Sandbox to experiment with dynamic mass virtual hosting and running a different composite per vhost.

git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@1063520 13f79535-47bb-0310-9956-ffa450edef68

155 files changed, 14874 insertions, 0 deletions

diff --git a/sandbox/sebastien/java/vhost/modules/assembly/LICENSE b/sandbox/sebastien/java/vhost/modules/assembly/LICENSE
new file mode 100644
index 0000000000..8aa906c321
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/LICENSE
@@ -0,0 +1,205 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
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+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
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+      "Licensor" shall mean the copyright owner or entity authorized by
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+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
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+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
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+      defend, and hold each Contributor harmless for any liability
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+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+
+
+
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/META-INF/MANIFEST.MF b/sandbox/sebastien/java/vhost/modules/assembly/META-INF/MANIFEST.MF
new file mode 100644
index 0000000000..61b8b3ffea
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/META-INF/MANIFEST.MF
@@ -0,0 +1,60 @@
+Manifest-Version: 1.0

+Export-Package: org.apache.tuscany.sca.assembly;version="2.0.0";

+  uses:="javax.xml.xpath,

+   org.apache.tuscany.sca.assembly.impl,

+   org.apache.tuscany.sca.core,

+   org.apache.tuscany.sca.policy,

+   org.apache.tuscany.sca.interfacedef,

+   javax.xml.namespace",

+ org.apache.tuscany.sca.assembly.builder;version="2.0.0";

+  uses:="org.apache.tuscany.sca.assembly,

+   org.apache.tuscany.sca.definitions,

+   org.apache.tuscany.sca.core,

+   org.apache.tuscany.sca.monitor",

+ org.apache.tuscany.sca.assembly.impl;version="2.0.0";

+  uses:="javax.xml.xpath,

+   org.apache.tuscany.sca.assembly,

+   org.apache.tuscany.sca.core,

+   org.apache.tuscany.sca.policy,

+   org.apache.tuscany.sca.interfacedef,

+   javax.xml.namespace",

+ org.apache.tuscany.sca.definitions;version="2.0.0",

+ org.apache.tuscany.sca.definitions.util;version="2.0.0";uses:="org.apache.tuscany.sca.definitions,org.apache.tuscany.sca.monitor",

+ org.apache.tuscany.sca.interfacedef;version="2.0.0";uses:="org.apache.tuscany.sca.interfacedef.util,org.apache.tuscany.sca.policy",

+ org.apache.tuscany.sca.interfacedef.impl;version="2.0.0";uses:="org.apache.tuscany.sca.interfacedef.util,org.apache.tuscany.sca.policy,org.apache.tuscany.sca.interfacedef",

+ org.apache.tuscany.sca.interfacedef.util;version="2.0.0";uses:="org.apache.tuscany.sca.interfacedef,javax.xml.namespace",

+ org.apache.tuscany.sca.policy;version="2.0.0";uses:="javax.xml.xpath,org.apache.tuscany.sca.policy.impl,javax.xml.namespace",

+ org.apache.tuscany.sca.policy.impl;version="2.0.0";uses:="javax.xml.xpath,org.apache.tuscany.sca.policy,javax.xml.namespace",

+ org.apache.tuscany.sca.policy.util;version="2.0.0";uses:="javax.xml.parsers,org.apache.tuscany.sca.policy"

+Private-Package: org.apache.tuscany.sca.assembly.builder.impl;version=

+ "2.0.0"

+SCA-Version: 1.1

+Bundle-Name: Apache Tuscany SCA Assembly Model

+Bundle-Vendor: The Apache Software Foundation

+Bundle-Version: 2.0.0

+Bundle-ManifestVersion: 2

+Bundle-License: http://www.apache.org/licenses/LICENSE-2.0.txt

+Bundle-Description: Apache Tuscany SCA Assembly Model

+Import-Package: javax.xml.datatype,

+ javax.xml.namespace,

+ javax.xml.parsers,

+ javax.xml.transform,

+ javax.xml.transform.dom,

+ javax.xml.transform.stream,

+ javax.xml.xpath,

+ org.apache.tuscany.sca.assembly;version="2.0.0",

+ org.apache.tuscany.sca.assembly.builder;version="2.0.0",

+ org.apache.tuscany.sca.assembly.impl;version="2.0.0",

+ org.apache.tuscany.sca.core;version="2.0.0",

+ org.apache.tuscany.sca.definitions;version="2.0.0",

+ org.apache.tuscany.sca.extensibility;version="2.0.0",

+ org.apache.tuscany.sca.interfacedef;version="2.0.0",

+ org.apache.tuscany.sca.interfacedef.impl;version="2.0.0";resolution:=optional,

+ org.apache.tuscany.sca.monitor;version="2.0.0",

+ org.apache.tuscany.sca.policy;version="2.0.0",

+ org.apache.tuscany.sca.policy.impl;version="2.0.0",

+ org.apache.tuscany.sca.policy.util;version="2.0.0",

+ org.w3c.dom

+Bundle-SymbolicName: org.apache.tuscany.sca.assembly

+Bundle-DocURL: http://www.apache.org/

+Bundle-RequiredExecutionEnvironment: J2SE-1.5,JavaSE-1.6
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/NOTICE b/sandbox/sebastien/java/vhost/modules/assembly/NOTICE
new file mode 100644
index 0000000000..d69e595698
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/NOTICE
@@ -0,0 +1,6 @@
+${pom.name}
+Copyright (c) 2005 - 2011 The Apache Software Foundation
+
+This product includes software developed by
+The Apache Software Foundation (http://www.apache.org/).
+
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/pom.xml b/sandbox/sebastien/java/vhost/modules/assembly/pom.xml
new file mode 100644
index 0000000000..11fa07c1e6
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/pom.xml
@@ -0,0 +1,45 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+-->
+<project>
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>org.apache.tuscany.sca</groupId>
+        <artifactId>tuscany-modules</artifactId>
+        <version>2.0-SNAPSHOT</version>
+        <relativePath>../pom.xml</relativePath>
+    </parent>
+    <artifactId>tuscany-assembly</artifactId>
+    <name>Apache Tuscany SCA Assembly Model</name>
+
+    <dependencies>
+      
+        <dependency>
+            <groupId>org.apache.tuscany.sca</groupId>
+            <artifactId>tuscany-monitor</artifactId>
+            <version>2.0-SNAPSHOT</version>
+        </dependency>        
+        <dependency>
+            <groupId>org.apache.tuscany.sca</groupId>
+            <artifactId>tuscany-extensibility</artifactId>
+            <version>2.0-SNAPSHOT</version>
+        </dependency>        
+    </dependencies>
+
+</project>
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/AbstractContract.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/AbstractContract.java
new file mode 100644
index 0000000000..dca1decb76
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/AbstractContract.java
@@ -0,0 +1,78 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.assembly;
+
+import org.apache.tuscany.sca.interfacedef.InterfaceContract;
+import org.apache.tuscany.sca.policy.PolicySubject;
+
+/**
+ * Interface contracts define one or more business functions. These business
+ * functions are provided by services and are used by references.
+ * 
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.asclient
+ */
+public interface AbstractContract extends Base, Extensible, PolicySubject {
+
+    /**
+     * Returns the name of the contract.
+     * 
+     * @return the name of the contract
+     */
+    String getName();
+
+    /**
+     * Sets the name of the contract.
+     * 
+     * @param name the name of the contract
+     */
+    void setName(String name);
+
+    /**
+     * Returns the interface contract defining the interface and callback
+     * interface for the contract.
+     * 
+     * @return the interface contract
+     */
+    InterfaceContract getInterfaceContract();
+
+    /**
+     * Sets the interface contract defining the interface and callback
+     * interface for the contract.
+     * 
+     * @param interfaceContract the interface contract
+     */
+    void setInterfaceContract(InterfaceContract interfaceContract);
+
+    /**
+     * Returns true if this contract is a reference or service created internally
+     * to handle a callback interface of another contract, false otherwise.
+     * 
+     * @return true for a callback contract, false otherwise
+     */
+    boolean isForCallback();
+
+    /**
+     * Sets a flag indicating whether this is a callback contract.
+     * 
+     * @param isCallback true for a callback contract, false otherwise
+     */
+    void setForCallback(boolean isCallback);
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/AbstractProperty.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/AbstractProperty.java
new file mode 100644
index 0000000000..45fa05d66c
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/AbstractProperty.java
@@ -0,0 +1,151 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.assembly;
+
+import javax.xml.namespace.QName;
+
+import org.apache.tuscany.sca.interfacedef.DataType;
+
+/**
+ * A property allows for the configuration of an implementation with externally
+ * set data values. An implementation can have zero or more properties. Each
+ * property has a data type, which may be either simple or complex. An
+ * implementation may also define a default value for a property.
+ *
+ * @version $Rev$ $Date$
+ */
+public interface AbstractProperty extends Base, Extensible {
+
+    /**
+     * Returns the property name.
+     * 
+     * @return the property name
+     */
+    String getName();
+
+    /**
+     * Sets the property name.
+     * 
+     * @param name the property name
+     */
+    void setName(String name);
+
+    /**
+     * Returns the default value of the property.
+     * 
+     * @return the default value of this property
+     */
+    Object getValue();
+
+    /**
+     * Sets the default value of the property.
+     * 
+     * @param defaultValue the default value of this property
+     */
+    void setValue(Object defaultValue);
+
+    /**
+     * Returns true if the property allows multiple values.
+     * 
+     * @return true if the property allows multiple values
+     */
+    boolean isMany();
+
+    /**
+     * Sets whether or not the property allows multiple values.
+     * 
+     * @param many true if the property should allow multiple values
+     */
+    void setMany(boolean many);
+
+    /**
+     * Returns true if a value must be supplied for the property.
+     * 
+     * @return true is a value must be supplied for the property
+     */
+    boolean isMustSupply();
+
+    /**
+     * Sets whether a value must be supplied for the property.
+     * 
+     * @param mustSupply set to true to require that a value be supplied for
+     *            uses of this property
+     */
+    void setMustSupply(boolean mustSupply);
+
+    /**
+     * Returns the data type of this property. This is the qualified name of an
+     * XML schema type.
+     * 
+     * @return the type of this property
+     */
+    QName getXSDType();
+
+    /**
+     * Sets the data type of this property. This is the qualified name of an XML
+     * schema type.
+     * 
+     * @param type the type of this property
+     */
+    void setXSDType(QName type);
+
+    /**
+     * Returns the element defining the data type of this property. This is the
+     * qualified name of an XML schema element.
+     * 
+     * @return the element defining the type of this property
+     */
+    QName getXSDElement();
+
+    /**
+     * Sets the element defining the data type of this property. This is the
+     * qualified name of an XML schema element.
+     * 
+     * @param element the element defining the type of this property
+     */
+    void setXSDElement(QName element);
+    
+    /**
+     * Get the data type for this property
+     * @return The data type
+     */
+    DataType getDataType();
+    
+    /**
+     * Set the data type
+     * @param dataType The data type
+     */
+    void setDataType(DataType dataType);
+    
+    /**
+     * Get the XML schema that represents the type if this property.
+     * Used during property value validation
+     * 
+     * @return
+     */
+    Object getXSDDefinition();
+    
+    /**
+     * Set the XML schema that represents the type if this property.
+     * Used during property value validation
+     * 
+     * @param xsdDefintion
+     */
+    void setXSDDefinition(Object xsdDefintion);
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/AbstractReference.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/AbstractReference.java
new file mode 100644
index 0000000000..a9ef26bbb9
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/AbstractReference.java
@@ -0,0 +1,43 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.assembly;
+
+/**
+ * Represents a reference contract.
+ * 
+ * @version $Rev$ $Date$
+ */
+public interface AbstractReference extends AbstractContract {
+
+    /**
+     * Returns the multiplicity allowed for wires connected to this reference.
+     * 
+     * @return the multiplicity allowed for wires connected to this reference
+     */
+    Multiplicity getMultiplicity();
+
+    /**
+     * Sets the multiplicity allowed for wires connected to this reference.
+     * 
+     * @param multiplicity the multiplicity allowed for wires connected to this
+     *            reference
+     */
+    void setMultiplicity(Multiplicity multiplicity);
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/AbstractService.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/AbstractService.java
new file mode 100644
index 0000000000..9ae511c07b
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/AbstractService.java
@@ -0,0 +1,28 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.assembly;
+
+/**
+ * Represents a service contract.
+ * 
+ * @version $Rev$ $Date$
+ */
+public interface AbstractService extends AbstractContract {
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/AssemblyFactory.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/AssemblyFactory.java
new file mode 100644
index 0000000000..5d82b9b727
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/AssemblyFactory.java
@@ -0,0 +1,167 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.assembly;
+
+/**
+ * A factory for the assembly model
+ * 
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.asclient
+ */
+public interface AssemblyFactory {
+
+    /**
+     * Create a new abstract property.
+     * 
+     * @return a new abstract property
+     */
+    AbstractProperty createAbstractProperty();
+
+    /**
+     * Create a new abstract reference.
+     * 
+     * @return a new abstract reference
+     */
+    AbstractReference createAbstractReference();
+
+    /**
+     * Create a new abstract service.
+     * 
+     * @return a new abstract service
+     */
+    AbstractService createAbstractService();
+
+    /**
+     * Create a new callback.
+     * 
+     * @return
+     */
+    Callback createCallback();
+
+    /**
+     * Create a new component.
+     * 
+     * @return a new component
+     */
+    Component createComponent();
+
+    /**
+     * Create a new component property.
+     * 
+     * @return a new component property
+     */
+    ComponentProperty createComponentProperty();
+
+    /**
+     * Create a new component reference.
+     * 
+     * @return a new component reference
+     */
+    ComponentReference createComponentReference();
+
+    /**
+     * Create a new component service.
+     * 
+     * @return a new component service
+     */
+    ComponentService createComponentService();
+
+    /**
+     * Create a new component type
+     * 
+     * @return a new component type
+     */
+    ComponentType createComponentType();
+
+    /**
+     * Create a new composite.
+     * 
+     * @return a new composite
+     */
+    Composite createComposite();
+
+    /**
+     * Create a new composite reference.
+     * 
+     * @return a new composite reference
+     */
+    CompositeReference createCompositeReference();
+
+    /**
+     * Create a new composite service.
+     * 
+     * @return a new composite service
+     */
+    CompositeService createCompositeService();
+
+    /**
+     * Create a new property.
+     * 
+     * @return a new property
+     */
+    Property createProperty();
+
+    /**
+     * Create a new reference.
+     * 
+     * @return a new reference
+     */
+    Reference createReference();
+
+    /**
+     * Create a new service.
+     * 
+     * @return a new service
+     */
+    Service createService();
+
+    /**
+     * Create a new wire.
+     * 
+     * @return a new wire
+     */
+    Wire createWire();
+
+    /**
+     * Create an Extension
+     * @return
+     */
+    Extension createExtension();
+
+    /**
+     * Create a new endpoint
+     * 
+     * @return a new endpoint
+     */
+    Endpoint createEndpoint();
+
+    /**
+     * Create a new endpoint reference
+     * 
+     * @return a new endpoint reference
+     */
+    EndpointReference createEndpointReference();
+
+    /** 
+     * Create a new configured operation.
+     * 
+     * @return a new ConfiguredOperation 
+     */
+    ConfiguredOperation createConfiguredOperation();
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Base.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Base.java
new file mode 100644
index 0000000000..b9abb90b03
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Base.java
@@ -0,0 +1,45 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.sca.assembly;
+
+/**
+ * Base interface for all assembly model objects.
+ *
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.inheritfrom
+ */
+public interface Base {
+    String SCA11_NS = "http://docs.oasis-open.org/ns/opencsa/sca/200912";
+    String SCA11_TUSCANY_NS = "http://tuscany.apache.org/xmlns/sca/1.1";
+
+    /**
+     * Returns true if the model element is unresolved.
+     *
+     * @return true if the model element is unresolved.
+     */
+    boolean isUnresolved();
+
+    /**
+     * Sets whether the model element is unresolved.
+     *
+     * @param unresolved whether the model element is unresolved
+     */
+    void setUnresolved(boolean unresolved);
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Binding.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Binding.java
new file mode 100644
index 0000000000..9b96556173
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Binding.java
@@ -0,0 +1,114 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.sca.assembly;
+
+import javax.xml.namespace.QName;
+
+/**
+ * Represents a binding.
+ *
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.inheritfrom
+ */
+public interface Binding extends Base, Cloneable {
+
+    /**
+     * Returns the binding URI.
+     *
+     * @return the binding URI
+     */
+    String getURI();
+
+    /**
+     * Sets the binding URI.
+     *
+     * @param uri the binding URI
+     */
+    void setURI(String uri);
+
+    /**
+     * Returns the binding name.
+     *
+     * @return the binding name
+     */
+    String getName();
+
+    /**
+     * Sets the binding name.
+     *
+     * @param name the binding name
+     */
+    void setName(String name);
+
+    /**
+     * Clone the binding
+     *
+     * @return the clone
+     */
+    Object clone() throws CloneNotSupportedException;
+
+    /**
+     * Returns the QName type for the binding
+     * 
+     * @return the binding type QName
+     */
+    QName getType();
+    
+    /**
+     * Returns the request wire format
+     * 
+     * @return the request wire format or null is none is specified
+     */
+    WireFormat getRequestWireFormat();
+
+    /**
+     * Sets the request wire format 
+     * 
+     * @param wireFormat the request wire format
+     */
+    void setRequestWireFormat(WireFormat wireFormat);
+
+    /**
+     * Returns the response wire format 
+     * 
+     * @return the response wire format or null is none is specified
+     */
+    WireFormat getResponseWireFormat();
+
+    /**
+     * Sets the response wire format
+     * 
+     * @param wireFormat the response wire format
+     */
+    void setResponseWireFormat(WireFormat wireFormat);
+
+    /**
+     * Returns the operation selector
+     * 
+     * @return the operation selector or null is none is specified
+     */
+    OperationSelector getOperationSelector();
+
+    /**
+     * Sets the operation selector
+     * 
+     * @param operationSelector the operation selector
+     */
+    void setOperationSelector(OperationSelector operationSelector);    
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Callback.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Callback.java
new file mode 100644
index 0000000000..a220f14159
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Callback.java
@@ -0,0 +1,53 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.assembly;
+
+import java.util.List;
+
+import org.apache.tuscany.sca.policy.PolicySubject;
+
+/**
+ * Represents a callback object describing the bindings to use for callbacks.
+ * 
+ * @version $Rev$ $Date$
+ */
+public interface Callback extends Base, Extensible, PolicySubject {
+
+    /**
+     * Returns the bindings supported for callbacks.
+     * 
+     * @return the bindings supported for callbacks
+     */
+    List<Binding> getBindings();
+    
+    /**
+     * Returns the contract that holds this callback
+     * 
+     * @return the contract that holds this callback
+     */
+    Contract getParentContract();
+    
+    /**
+     * Sets the contract that holds this callback
+     * 
+     * @param contract the contract that holds this callback
+     */    
+    void setParentContract(Contract contract);
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Component.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Component.java
new file mode 100644
index 0000000000..efd8557e07
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Component.java
@@ -0,0 +1,142 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.assembly;
+
+import java.util.List;
+
+import org.apache.tuscany.sca.policy.PolicySubject;
+
+/**
+ * Represents a component. A component is a configured instance of an
+ * implementation.
+ * 
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.asclient
+ */
+public interface Component extends Base, Extensible, PolicySubject, Cloneable {
+
+    /**
+     * Returns the URI of the component.
+     *  
+     * @return the URI of the component
+     */
+    String getURI();
+
+    /**
+     * Sets the URI of the component.
+     * 
+     * @param uri the URI of the component
+     */
+    void setURI(String uri);
+
+    /**
+     * Returns the name of the component.
+     * 
+     * @return the name of the component
+     */
+    String getName();
+
+    /**
+     * Sets the name of the component.
+     * 
+     * @param name the name of the component
+     */
+    void setName(String name);
+
+    /**
+     * Returns the component implementation.
+     * 
+     * @return the component implementation
+     */
+    Implementation getImplementation();
+
+    /**
+     * Sets the component implementation
+     * 
+     * @param implementation the component implementation
+     */
+    void setImplementation(Implementation implementation);
+
+    /**
+     * Returns a list of references used by the component.
+     * 
+     * @return a list of references used by the component
+     */
+    List<ComponentReference> getReferences();
+    
+    /**
+     * Return a reference by name
+     * 
+     * @param name the reference name
+     * @return reference the reference
+     */
+    ComponentReference getReference(String name);    
+
+    /**
+     * Returns a list of services exposed by the component.
+     * 
+     * @return a list of services exposed by the component
+     */
+    List<ComponentService> getServices();
+    
+    /**
+     * Return a service by name
+     * 
+     * @param name the service name
+     * @return service the service
+     */
+    ComponentService getService(String name);    
+
+    /**
+     * Returns a list of properties for the component.
+     * 
+     * @return a list of properties
+     */
+    List<ComponentProperty> getProperties();
+    
+    /**
+     * Return a property by name
+     * 
+     * @param name the property name
+     * @return property the property
+     */
+    ComponentProperty getProperty(String name);    
+
+    /**
+     * Return the Boolean value of autowire
+     * @return null/TRUE/FALSE
+     */
+    Boolean getAutowire();
+
+    /**
+     * Sets whether component references should be autowired.
+     * 
+     * @param autowire whether component references should be autowired
+     */
+    void setAutowire(Boolean autowire);
+
+    /**
+     * Returns a clone of the component.
+     * 
+     * @return a clone of the component
+     * @throws CloneNotSupportedException
+     */
+    Object clone() throws CloneNotSupportedException;
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/ComponentProperty.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/ComponentProperty.java
new file mode 100644
index 0000000000..1202b4d83a
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/ComponentProperty.java
@@ -0,0 +1,89 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.assembly;
+
+import javax.xml.xpath.XPathExpression;
+
+/**
+ * Represents a configured property of a component.
+ * 
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.asclient
+ */
+public interface ComponentProperty extends Property {
+
+    /**
+     * Returns the property defined by the component implementation.
+     * 
+     * @return the property defined by the component implementation
+     */
+    Property getProperty();
+
+    /**
+     * Sets the property defined by this component implementation.
+     * 
+     * @param property the property defined by this component implementation
+     */
+    void setProperty(Property property);
+
+    /**
+     * Returns an XPath expression referencing a property of the enclosing
+     * composite.
+     * 
+     * @return an XPath expression referencing a property of the enclosing
+     *         composite
+     */
+    String getSource();
+
+    /**
+     * Sets an XPath expression referencing a property of the enclosing
+     * composite.
+     * 
+     * @param source an XPath expression referencing a property of the enclosing
+     *            composite
+     */
+    void setSource(String source);
+
+    /**
+     * Get the XPath expression for the source attribute
+     * @return the XPath expression for the source attribute
+     */
+    XPathExpression getSourceXPathExpression();
+
+    /**
+     * Set the XPath expression for the source attribute
+     * @param sourceXPathExpression the XPath expression for the source attribute
+     */
+    void setSourceXPathExpression(XPathExpression sourceXPathExpression);
+
+    /**
+     * Returns a URI to a file containing the property value.
+     * 
+     * @return a URI to a file containing the property value
+     */
+    String getFile();
+
+    /**
+     * Sets a URI to a file containing the property value.
+     * 
+     * @param file a URI to a file containing the property value
+     */
+    void setFile(String file);
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/ComponentReference.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/ComponentReference.java
new file mode 100644
index 0000000000..ad72780de8
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/ComponentReference.java
@@ -0,0 +1,113 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.sca.assembly;
+
+/**
+ * An instance of a reference associated with a particular component.
+ *
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.asclient
+ */
+public interface ComponentReference extends Reference {
+
+    /**
+     * Returns the reference defined by the implementation for this reference.
+     *
+     * @return the implementation reference
+     */
+    Reference getReference();
+
+    /**
+     * Sets the reference defined by the implementation for this reference.
+     *
+     * @param reference the implementation reference
+     */
+    void setReference(Reference reference);
+
+    /**
+     * Return the Boolean value of autowire
+     * @return null/TRUE/FALSE
+     */
+    Boolean getAutowire();
+
+    /**
+     * Sets whether component references should be autowired.
+     *
+     * @param autowire whether component references should be autowired
+     */
+    void setAutowire(Boolean autowire);
+
+    /**
+     * Returns the callback service created internally as a target endpoint
+     * for callbacks to this reference.
+     *
+     * @return the callback service
+     */
+    ComponentService getCallbackService();
+
+    /**
+     * Sets the callback service created internally as a target endpoint
+     * for callbacks to this reference.
+     *
+     * @param callbackService the callback service
+     */
+    void setCallbackService(ComponentService callbackService);
+
+    /**
+     * A boolean value, "false" by default, which indicates whether this component reference
+     * can have its targets overridden by a composite reference which promotes the
+     * component reference.
+     *
+     *  If @nonOverridable==false, the target(s) of the promoting composite reference
+     *  replace all the targets explicitly declared on the component reference for any
+     *  value of @multiplicity on the component reference.
+     *
+     *  If the component reference has @nonOverridable==false and @multiplicity 1..1
+     *  and the reference has a target, then any composite reference which promotes
+     *  the component reference has @multiplicity 0..1.by default and MAY have an explicit @multiplicity of either
+     *  0..1 or 1..1.
+     *
+     *  If @nonOverridable==true, and the component reference has @multiplicity 0..1 or
+     *  1..1 and the component reference also declares a target, promotion implies
+     *  that the promoting composite reference has @wiredbyImpl==true and the composite
+     *  reference cannot supply a target, but can influence the policy attached to the
+     *  component reference.
+     *
+     *  If @nonOverridable==true, and the component reference @multiplicity is 0..n
+     *  or 1..n, promotion targeting is additive
+     *
+     *  @return
+     */
+    boolean isNonOverridable();
+
+    /**
+     * Set the nonOverridable flag
+     * @param nonOverridable
+     */
+    void setNonOverridable(boolean nonOverridable);
+
+    /**
+     * Sets whether this Component Reference is promoted
+     * @param isPromoted - true if the component reference is promoted
+     */
+    void setPromoted(boolean isPromoted);
+
+    boolean isPromoted();
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/ComponentService.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/ComponentService.java
new file mode 100644
index 0000000000..e1e3eab90c
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/ComponentService.java
@@ -0,0 +1,59 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.assembly;
+
+/**
+ * An addressable instance of a service associated with a particular component.
+ * 
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.asclient
+ */
+public interface ComponentService extends Service {
+
+    /**
+     * Returns the service defined by the implementation for this service.
+     * 
+     * @return
+     */
+    Service getService();
+
+    /**
+     * Sets the service defined by the implementation for this service.
+     * 
+     * @param service
+     */
+    void setService(Service service);
+
+    /**
+     * Returns the callback reference created internally as a source endpoint
+     * for callbacks from this service.
+     * 
+     * @return the callback reference
+     */
+    ComponentReference getCallbackReference();
+
+    /**
+     * Sets the callback reference created internally as a source endpoint
+     * for callbacks from this service.
+     * 
+     * @param callbackReference the callback reference
+     */
+    void setCallbackReference(ComponentReference callbackReference);
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/ComponentType.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/ComponentType.java
new file mode 100644
index 0000000000..f748828999
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/ComponentType.java
@@ -0,0 +1,90 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.assembly;
+
+import java.util.List;
+
+import org.apache.tuscany.sca.policy.PolicySubject;
+
+/**
+ * Describes an implementation and represents its configurable aspects.
+ * 
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.asclient
+ */
+public interface ComponentType extends Base, PolicySubject {
+
+    /**
+     * Returns the URI of this component type.
+     * @return the URI of the component type
+     */
+    String getURI();
+
+    /**
+     * Sets the URI of this component type.
+     * @param uri the URI of the component type
+     */
+    void setURI(String uri);
+
+    /**
+     * Returns a list of services that are offered.
+     * 
+     * @return a list of services that are offered
+     */
+    List<Service> getServices();
+    
+    /**
+     * Return a service by name
+     * 
+     * @param name the service name
+     * @return service the service
+     */
+    Service getService(String name);
+   
+    /**
+     * Returns the list of reference types that are used.
+     * 
+     * @return the list of reference types that are used
+     */
+    List<Reference> getReferences();
+    
+    /**
+     * Return a reference by name
+     * 
+     * @param name the reference name
+     * @return reference the reference
+     */
+    Reference getReference(String name);
+
+    /**
+     * Returns the list of properties that can be set.
+     * 
+     * @return the list of properties that can be set
+     */
+    List<Property> getProperties();
+    
+    /**
+     * Return a property by name
+     * 
+     * @param name the property name
+     * @return property the property
+     */
+    Property getProperty(String name);
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Composite.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Composite.java
new file mode 100644
index 0000000000..64a55f1b44
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Composite.java
@@ -0,0 +1,132 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.sca.assembly;
+
+import java.util.List;
+
+import javax.xml.namespace.QName;
+
+import org.apache.tuscany.sca.policy.PolicySubject;
+
+/**
+ * Represents a composite.
+ *
+ * @version $Rev$ $Date$
+ */
+public interface Composite extends Implementation, Extensible, Cloneable, PolicySubject {
+    /**
+     * Special name for the domain composite
+     */
+    QName DOMAIN_COMPOSITE = new QName(SCA11_NS, "");
+    QName TYPE = new QName(SCA11_NS, "implementation.composite");
+
+    /**
+     * Returns the spec version of the composite used to build this model
+     *
+     * @return the spec version used to build this model
+     */
+    String getSpecVersion();
+
+    /**
+     * Sets the spec version of the composite used to build this model
+     *
+     * @param specVersion the spec version used to build this model
+     */
+    void setSpecVersion(String specVersion);
+
+    /**
+     * Returns the name of the composite.
+     *
+     * @return the name of the composite
+     */
+    QName getName();
+
+    /**
+     * Sets the name of the composite.
+     *
+     * @param name the name of the composite
+     */
+    void setName(QName name);
+
+    /**
+     * Returns a list of composites included in this composite.
+     *
+     * @return a list of composites included in this composite.
+     */
+    List<Composite> getIncludes();
+
+    /**
+     * Returns a list of components contained in this composite.
+     *
+     * @return a list of components contained in this composite
+     */
+    List<Component> getComponents();
+    
+    /**
+     * Returns a component by name
+     */
+    Component getComponent(String name);
+    
+    /**
+     * Returns a list of wires contained in this composite.
+     *
+     * @return a list of wires contained in this composite
+     */
+    List<Wire> getWires();
+
+    /**
+     * Returns true if all the components within the composite must run in the
+     * same process.
+     *
+     * @return true if all the components within the composite must run in the
+     *         same process
+     */
+    boolean isLocal();
+
+    /**
+     * Sets whether all the components within the composite must run in the same
+     * process.
+     *
+     * @param local whether all the components within the composite must run in
+     *            the same process
+     */
+    void setLocal(boolean local);
+
+    /**
+     * Return the Boolean value of autowire
+     * @return null/TRUE/FALSE
+     */
+    Boolean getAutowire();
+
+    /**
+     * Sets whether component references should be autowired.
+     *
+     * @param autowire whether component references should be autowired
+     */
+    void setAutowire(Boolean autowire);
+
+    /**
+     * Returns a clone of the component type.
+     *
+     * @return a clone of the component type
+     * @throws CloneNotSupportedException
+     */
+    Object clone() throws CloneNotSupportedException;
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/CompositeReference.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/CompositeReference.java
new file mode 100644
index 0000000000..88cb2f9a2c
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/CompositeReference.java
@@ -0,0 +1,44 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.assembly;
+
+import java.util.List;
+
+/**
+ * Represents composite reference.
+ * 
+ * @version $Rev$ $Date$
+ */
+public interface CompositeReference extends Reference {
+    /**
+     * Returns the promoted components. For each promoted component/reference, 
+     * they have the same index in the component and reference list. 
+     *  
+     * @return the promoted components
+     */
+    List<Component> getPromotedComponents();
+
+    /**
+     * Returns the promoted component references.
+     * 
+     * @return the promoted component references
+     */
+    List<ComponentReference> getPromotedReferences();
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/CompositeService.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/CompositeService.java
new file mode 100644
index 0000000000..575d0784ce
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/CompositeService.java
@@ -0,0 +1,57 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.assembly;
+
+/**
+ * Represents a composite service.
+ * 
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.asclient
+ */
+public interface CompositeService extends Service {
+
+    /**
+     * Returns the promoted component.
+     * 
+     * @return the promoted component.
+     */
+    Component getPromotedComponent();
+
+    /**
+     * Sets the promoted component
+     * 
+     * @param promotedComponent the promoted component.
+     */
+    void setPromotedComponent(Component promotedComponent);
+
+    /**
+     * Returns the promoted component service .
+     * 
+     * @return the promoted component service.
+     */
+    ComponentService getPromotedService();
+
+    /**
+     * Sets the promoted component service
+     * 
+     * @param promotedService the promoted component service.
+     */
+    void setPromotedService(ComponentService promotedService);
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/ConfiguredOperation.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/ConfiguredOperation.java
new file mode 100644
index 0000000000..25ae82aa8f
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/ConfiguredOperation.java
@@ -0,0 +1,62 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.assembly;
+
+import org.apache.tuscany.sca.policy.PolicySubject;
+
+/**
+ * Represents an Operation. Typically Operation elements are used when there is a
+ * need to apply certain facets such as intents and policysets only to a specific
+ * operation provided by a service or reference.
+ *
+ * @tuscany.spi.extension.asclient
+ * @version $Rev$ $Date$
+ */
+public interface ConfiguredOperation extends Base, PolicySubject {
+    /**
+     * Returns the name of the operation.
+     * 
+     * @return the name of the operation
+     */
+    String getName();
+
+    /**
+     * Sets the name of the operation.
+     * 
+     * @param name the name of the operation
+     */
+    void setName(String name);
+    
+    /**
+     * Returns the name of the service or reference to which this operation belongs.
+     * This method is particularly useful when operation elements are specified under implementation
+     * elements and it is necessary to identify which of the various services provided by the 
+     * implementation is referred to by the operation element in question
+     * 
+     * @return the name of the contract to which this operation belongs
+     */
+    String getContractName();
+    
+    /**
+     * Sets the name of the service or reference to which this operation belongs.
+     * 
+     * @param contractName the name of the contract to which this operation belongs
+     */
+    void setContractName(String contractName);
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Contract.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Contract.java
new file mode 100644
index 0000000000..0c57c74ec0
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Contract.java
@@ -0,0 +1,111 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.assembly;
+
+import java.util.List;
+
+import org.apache.tuscany.sca.interfacedef.InterfaceContract;
+import org.apache.tuscany.sca.policy.PolicySubject;
+
+/**
+ * Represents a contract. A contract can be either a service or a reference.
+ * 
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.asclient
+ */
+public interface Contract extends AbstractContract, PolicySubject, Cloneable {
+
+    /**
+     * Returns the bindings supported by this contract.
+     * 
+     * @return the bindings supported by this contract
+     */
+    List<Binding> getBindings();
+
+    /**
+     * Returns a binding of the specified type or null if there is no such
+     * binding configured on this contract.
+     * 
+     * @param <B> the binding type
+     * @param bindingClass the binding type class
+     * @return the binding or null if there is no binding of the specified type
+     */
+    <B> B getBinding(Class<B> bindingClass);
+
+    /**
+     * Returns a callback binding of the specified type or null if there is no such
+     * callback binding configured on this contract.
+     * 
+     * @param <B> the callback binding type
+     * @param bindingClass the callback binding type class
+     * @return the callback binding or null if there is no callback binding of the specified type
+     */
+    <B> B getCallbackBinding(Class<B> bindingClass);
+
+    /**
+     * Returns a callback definition of the bindings to use for callbacks.
+     * 
+     * @return a definition of the bindings to use for callbacks
+     */
+    Callback getCallback();
+
+    /**
+     * Sets a callback definition of the bindings to use for callbacks
+     * 
+     * @param callback a definition of the bindings to use for callbacks
+     */
+    void setCallback(Callback callback);
+
+    /**
+     * Returns a clone of the contract.
+     * 
+     * @return a clone of the reference
+     * @throws CloneNotSupportedException
+     */
+    Object clone() throws CloneNotSupportedException;
+
+    /**
+     * Returns the interface contract given a binding. Important in the case where
+     * a reference with multiplicity > 1 has been promoted and has it's list of 
+     * resolved bindings extended by a promoting reference. Here the binding
+     * from the promoting reference may need the interface contract from the 
+     * promoting reference and not the promoted reference.
+     * TODO - remove this wrinkle with better endpoint support.  
+     * 
+     * @param binding the binding for which the interface contract is required
+     * @return the interface contract
+     */
+    InterfaceContract getInterfaceContract(Binding binding);
+    
+    /**
+     * A flag to tell if there are any binding elements specified for this service or reference. 
+     * If true, they override the the bindings in the corresponding reference/service in the 
+     * component type or promoted reference/service.  
+     * @return
+     */
+    boolean isOverridingBindings();
+    
+    /**
+     * Set the flag depending on if there are any binding elements specified for this service or 
+     * reference.
+     * @param overridingBindings true if there are binding elements specified
+     */
+    void setOverridingBindings(boolean overridingBindings);
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/DefaultAssemblyFactory.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/DefaultAssemblyFactory.java
new file mode 100644
index 0000000000..6d8350fc66
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/DefaultAssemblyFactory.java
@@ -0,0 +1,41 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.tuscany.sca.assembly;
+
+import org.apache.tuscany.sca.assembly.impl.AssemblyFactoryImpl;
+import org.apache.tuscany.sca.core.DefaultExtensionPointRegistry;
+import org.apache.tuscany.sca.core.ExtensionPointRegistry;
+
+/**
+ * A factory for the assembly model.
+ *
+ * @version $Rev$ $Date$
+ */
+public class DefaultAssemblyFactory extends AssemblyFactoryImpl implements AssemblyFactory {
+
+    public DefaultAssemblyFactory(ExtensionPointRegistry registry) {
+        super(registry);
+    }
+
+    public DefaultAssemblyFactory() {
+        super(new DefaultExtensionPointRegistry());
+    }
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Endpoint.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Endpoint.java
new file mode 100644
index 0000000000..ec16b20b6e
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Endpoint.java
@@ -0,0 +1,148 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.sca.assembly;
+
+import java.io.Serializable;
+import java.util.List;
+
+import org.apache.tuscany.sca.interfacedef.InterfaceContract;
+import org.apache.tuscany.sca.policy.PolicySubject;
+
+/**
+ * Represents a service endpoint which is what results from having a configured
+ * binding applied to a component service. In a deployed application an endpoint
+ * will relate directly to a physical endpoint, for example, a HTTP URL or a
+ * JMS destination.
+ *
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.asclient
+ */
+public interface Endpoint extends Base, PolicySubject, Cloneable, Serializable {
+    /**
+     * Get the structural URI of the service binding
+     * @return structural URI of the service/binding
+     */
+    String getURI();
+
+    /**
+     * Set the structural URI of the service binding
+     * @param uri &lt;componentURI&gt;#service-binding(serviceName/bindingName)
+     * or &lt;componentURI&gt;#service(serviceName)
+     */
+    void setURI(String uri);
+
+    /**
+     * Get the component model object
+     *
+     * @return component
+     */
+    Component getComponent();
+
+    /**
+     * Set the component model object
+     *
+     * @param component
+     */
+    void setComponent(Component component);
+
+    /**
+     * Get the service model object
+     *
+     * @return service
+     */
+    ComponentService getService();
+
+    /**
+     * Set the service model object
+     *
+     * @param service
+     */
+    void setService(ComponentService service);
+
+    /**
+     * Get the resolved target binding
+     *
+     * @return target binding
+     */
+    Binding getBinding();
+
+    /**
+     * Set the binding
+     *
+     * @param  binding
+     */
+    void setBinding(Binding binding);
+
+    /**
+     * Returns the interface contract defining the interface
+     *
+     * @return the interface contract
+     */
+    InterfaceContract getComponentServiceInterfaceContract();
+
+    /**
+     * Get the service's callback endpoint references that
+     * represent endpoint references from which callbacks
+     * originate
+     *
+     * @return callbackEndpoint the reference callback endpoint
+     */
+    List<EndpointReference> getCallbackEndpointReferences();
+
+    /**
+     * Returns true if this endpoint represents a serivce that is not
+     * running in this JVM
+     * 
+     * @return true if the endpoint is remote
+     */
+    boolean isRemote();
+
+    /**
+     * Set true if this endpoint represents a serivce that is not
+     * running in this JVM
+     * 
+     * @param remote set to true if the endpoint is remote
+     */
+    void setRemote(boolean remote);
+
+    /**
+     * Supports endpoint cloning
+     *
+     * @return endpoint
+     * @throws CloneNotSupportedException
+     */
+    Object clone() throws CloneNotSupportedException;
+
+    /**
+     * Tests if the URI of this endpoint matches the service URI
+     * @param serviceName the service URI to test
+     * @return true if the endpoint URI matches the service URI
+     */
+    boolean matches(String serviceURI);
+    
+    /**
+     * When true this endpoint is able to process the invocation
+     * asynchronously. The forward call is effectively one-way
+     * and the response will arrive asynchronously
+     * 
+     * @return true if the service is asynchronous
+     */
+    boolean isAsyncInvocation();    
+    
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/EndpointReference.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/EndpointReference.java
new file mode 100644
index 0000000000..c70d4521ba
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/EndpointReference.java
@@ -0,0 +1,174 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.sca.assembly;
+
+import java.io.Serializable;
+
+import org.apache.tuscany.sca.interfacedef.InterfaceContract;
+import org.apache.tuscany.sca.policy.PolicySubject;
+
+/**
+ * Represents an endpoint reference. An SCA reference can reference service endpoints in a
+ * number of ways. Target names, autowire, configured bindings. The endpoint reference
+ * captures the result of specifying one of these things.
+ *
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.asclient
+ */
+public interface EndpointReference extends Base, PolicySubject, Cloneable, Serializable {
+
+    /**
+     * Status of the endpoint reference resolution
+     */
+    enum Status {
+        NOT_CONFIGURED, // Not configured
+        RESOLVED_BINDING, // The endpoint reference is configured with a binding
+        AUTOWIRE_PLACEHOLDER, // Autowire to be performed
+        WIRED_TARGET_NOT_FOUND, // Wire target not found
+        WIRED_TARGET_FOUND_READY_FOR_MATCHING, // Wire target found and ready to be resolved to an endpoint
+        WIRED_TARGET_FOUND_AND_MATCHED, // Wire target found and resolved to an endpoint
+        WIRED_TARGET_IN_BINDING_URI // SCA target specified by the binding uri
+    };
+
+    /**
+     * Get the structural URI of the reference binding
+     * @return The structural URI of the reference/binding
+     */
+    String getURI();
+
+    /**
+     * Set the structural URI of the reference binding
+     * @param uri &lt;componentURI&gt;#reference-binding(referenceName/bindingName)
+     * or &lt;componentURI&gt;#reference(referenceName) if binding is not present
+     *
+     */
+    void setURI(String uri);
+
+    /**
+     * Supports endpoint reference cloning
+     *
+     * @return endpointReference
+     * @throws CloneNotSupportedException
+     */
+    Object clone() throws CloneNotSupportedException;
+
+    /**
+     * Get the component model object
+     *
+     * @return component
+     */
+    Component getComponent();
+
+    /**
+     * Set the  component model object
+     *
+     * @param component the component for the endpoint
+     */
+    void setComponent(Component component);
+
+    /**
+     * Get the source component reference model object
+     *
+     * @return reference the source component reference  for the endpoint
+     */
+    ComponentReference getReference();
+
+    /**
+     * Set the source component reference model object
+     *
+     * @param reference
+     */
+    void setReference(ComponentReference reference);
+
+    /**
+     * Get the resolved reference binding
+     *
+     * @return binding the resolved reference binding
+     */
+    Binding getBinding();
+
+    /**
+     * Set the resolved reference binding
+     *
+     * @param binding the resolved reference binding
+     */
+    void setBinding(Binding binding);
+
+    /**
+     * Get the target endpoint
+     *
+     * @return endpoint the target endpoint
+     */
+    Endpoint getTargetEndpoint();
+
+    /**
+     * Set the target endpoint model object
+     *
+     * @param endpoint the target endpoint
+     */
+    void setTargetEndpoint(Endpoint targetEndpoint);
+
+    /**
+     * Returns the interface contract defining the interface
+     *
+     * @return the interface contract
+     */
+    InterfaceContract getComponentReferenceInterfaceContract();
+
+    /**
+     * Get the reference callback endpoint that
+     * represents that target endpoint to which callback
+     * messages will be directed
+     *
+     * @return callbackEndpoint the reference callback endpoint
+     */
+    Endpoint getCallbackEndpoint();
+
+    /**
+     * Set the reference callback endpoint
+     *
+     * @param callbackEndpoint the reference callback endpoint
+     */
+    void setCallbackEndpoint(Endpoint callbackEndpoint);
+
+    /**
+     * Rather than relying on combinations of unresolved flags and 
+     * other data we maintain a status enumeration
+     * 
+     * @return status
+     */
+    Status getStatus();
+
+    /**
+     * Rather than relying on combinations of unresolved flags and 
+     * other data we maintain a status enumeration
+     * 
+     * @param status the new status
+     */
+    void setStatus(Status status);
+    
+    /**
+     * When true this endpoint reference is able to process the invocation
+     * asynchronously. The forward call is effectively one-way
+     * and the response will arrive asynchronously
+     * 
+     * @return true if the reference is asynchronous
+     */
+    boolean isAsyncInvocation();
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Extensible.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Extensible.java
new file mode 100644
index 0000000000..da8d054140
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Extensible.java
@@ -0,0 +1,45 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.assembly;
+
+import java.util.List;
+
+/**
+ * Base interface for extensible assembly model objects.
+ * 
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.inheritfrom
+ */
+public interface Extensible extends Base {
+
+    /**
+     * Returns a list of extension objects contained in this model object.
+     * 
+     * @return a list of extension objects container in this model object
+     */
+    List<Object> getExtensions();
+
+    /**
+     * Returns a list of attribute extensions contained in this model object
+     * 
+     * @return a list of attribute extensions contained in this model object
+     */
+    List<Extension> getAttributeExtensions();
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Extension.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Extension.java
new file mode 100644
index 0000000000..d179ce7b3b
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Extension.java
@@ -0,0 +1,66 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.assembly;
+
+import javax.xml.namespace.QName;
+
+/**
+ * Base interface for storing contents of extensible assembly model objects.
+ * 
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.asclient
+ */
+public interface Extension {
+
+    /**
+     * Return QName for the extension
+     * @return the extension QName
+     */
+    QName getQName();
+
+    /**
+     * Set QName for the extension
+     * @param qName the extension QName
+     */
+    void setQName(QName qName);
+
+    /**
+     * Return the original extension value
+     * @return the extension value
+     */
+    <T> T getValue();
+
+    /**
+     * Set the original extension value
+     * @param value the extension value
+     */
+    <T> void setValue(T value);
+
+    /**
+     * Return whether or not the extension is an attribute
+     * @return 
+     */
+    boolean isAttribute();
+
+    /**
+     * Set whether or not the extension is an attribute
+     * @param value
+     */
+    void setAttribute(boolean isAttribute);
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Implementation.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Implementation.java
new file mode 100644
index 0000000000..3912896f0c
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Implementation.java
@@ -0,0 +1,36 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.sca.assembly;
+
+import java.util.List;
+
+import javax.xml.namespace.QName;
+
+import org.apache.tuscany.sca.interfacedef.Operation;
+
+/**
+ * Represents a component implementation.
+ *
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.inheritfrom
+ */
+public interface Implementation extends ComponentType {
+    QName getType();
+    List<Operation> getOperations();
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Multiplicity.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Multiplicity.java
new file mode 100644
index 0000000000..5b719e50bc
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Multiplicity.java
@@ -0,0 +1,50 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.assembly;
+
+/**
+ * Enumeration for multiplicity. Defines the number of wires that can connect a
+ * reference to target services.
+ * 
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension
+ */
+public enum Multiplicity {
+
+    /**
+     * Zero or one wire can have the reference as a source.
+     */
+    ZERO_ONE,
+
+    /**
+     * The default setting, one wire can have the reference as a source.
+     */
+    ONE_ONE,
+
+    /**
+     * Zero or more wires can have the reference as a source.
+     */
+    ZERO_N,
+
+    /**
+     * One or more wires can have the reference as a source.
+     */
+    ONE_N
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/OperationSelector.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/OperationSelector.java
new file mode 100644
index 0000000000..9df72e358d
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/OperationSelector.java
@@ -0,0 +1,29 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.assembly;
+
+/**
+ * Represents an operationSelector
+ * 
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.asclient
+ */
+public interface OperationSelector extends Base, Cloneable {
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/OperationsConfigurator.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/OperationsConfigurator.java
new file mode 100644
index 0000000000..9563d2e1cb
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/OperationsConfigurator.java
@@ -0,0 +1,33 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.assembly;
+
+import java.util.List;
+
+/**
+ * Interface to be implemented by SCA artifacts that support configuration of 'operation' child
+ * elements for policies etc. 
+ * @tuscany.spi.extension.inheritfrom
+ * @version $Rev$ $Date$
+ */
+
+public interface OperationsConfigurator {
+    List<ConfiguredOperation> getConfiguredOperations();
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Property.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Property.java
new file mode 100644
index 0000000000..c65b6213b0
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Property.java
@@ -0,0 +1,40 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.assembly;
+
+/**
+ * A property allows for the configuration of an implementation with externally
+ * set data values. An implementation can have zero or more properties. Each
+ * property has a data type, which may be either simple or complex. An
+ * implementation may also define a default value for a property.
+ * 
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.asclient
+ */
+public interface Property extends AbstractProperty, Cloneable {
+
+    /**
+     * Returns a clone of the property.
+     * 
+     * @return a clone of the property
+     * @throws CloneNotSupportedException
+     */
+    Object clone() throws CloneNotSupportedException;
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Reference.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Reference.java
new file mode 100644
index 0000000000..2ee3e774e4
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Reference.java
@@ -0,0 +1,71 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.assembly;
+
+import java.util.List;
+
+/**
+ * Represents a reference. References within an implementation represent links
+ * to services that the implementation uses that must be provided by other
+ * components.
+ * 
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.asclient
+ */
+public interface Reference extends AbstractReference, Contract {
+
+    /**
+     * Returns a boolean value, "false" by default, which indicates that the
+     * implementation wires this reference dynamically.
+     * 
+     * @return true if the implementation wires this reference dynamically
+     */
+    boolean isWiredByImpl();
+
+    /**
+     * Sets a boolean value, "false" by default, which indicates that the
+     * implementation wires this reference dynamically.
+     * 
+     * @param wiredByImpl whether the implementation wires this reference
+     *            dynamically
+     */
+    void setWiredByImpl(boolean wiredByImpl);
+
+
+    /**
+     * Returns the targets of this reference.
+     * 
+     * @return the targets of this reference.
+     */
+    List<ComponentService> getTargets();
+
+    /**
+     * Returns the endpoint references implied by this reference.
+     *  
+     * Endpoint references are used to represent:
+     * 
+     *   - manually specified reference targets
+     *   - reference targets determined by autowire
+     *   - manually configured remote bindings
+     *   
+     * @return the endpoint references implied by this reference
+     */
+    List<EndpointReference> getEndpointReferences();
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/SCABinding.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/SCABinding.java
new file mode 100644
index 0000000000..aa356e3857
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/SCABinding.java
@@ -0,0 +1,30 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.sca.assembly;
+
+import javax.xml.namespace.QName;
+
+/**
+ * Represents an SCA binding.
+ *
+ * @version $Rev$ $Date$
+ */
+public interface SCABinding extends Binding {
+    QName TYPE = new QName(SCA11_NS, "binding.sca");
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/SCABindingFactory.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/SCABindingFactory.java
new file mode 100644
index 0000000000..feae980326
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/SCABindingFactory.java
@@ -0,0 +1,35 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.sca.assembly;
+
+/**
+ * A factory for the SCA binding model
+ *
+ * @version $Rev$ $Date$
+ */
+public interface SCABindingFactory {
+
+    /**
+     * Create a new SCA binding.
+     *
+     * @return a new SCA binding
+     */
+    SCABinding createSCABinding();
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Service.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Service.java
new file mode 100644
index 0000000000..9caa7563c9
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Service.java
@@ -0,0 +1,59 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.assembly;
+
+import java.util.List;
+
+/**
+ * Represents a service. Services are used to publish services provided by
+ * implementations, so that they are addressable by other components.
+ * 
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.asclient
+ */
+public interface Service extends AbstractService, Contract {
+    /**
+     * Returns the endpoints implied by this service.
+     * 
+     * Endpoints represent configured bindings for a service. Hence a service
+     * with two bindings will expose two Endpoints. Where a promoted service has 
+     * new binding configuration applied by a promoting component Endpoints are
+     * introduced to represent these new bindings.  
+     * 
+     * @return the endpoints implied by this service
+     */
+    List<Endpoint> getEndpoints();
+    
+    
+    /**
+     * Returns true if this service was defined based on JAXWS annotations 
+     * in a Java implementation
+     * 
+     * @return
+     */
+    boolean isJAXWSService();
+    
+    /**
+     * Allows the JAXWSService flag to be set. It should be set true if the service
+     * configuration has been affected by JAXWS annotations. 
+     * 
+     * @param isJAXWSService
+     */
+    void setJAXWSService(boolean isJAXWSService);
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Wire.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Wire.java
new file mode 100644
index 0000000000..075b50eec1
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Wire.java
@@ -0,0 +1,85 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.assembly;
+
+import org.apache.tuscany.sca.policy.PolicySubject;
+
+/**
+ * Represents a wire.
+ * 
+ * @version $Rev$ $Date$
+ */
+public interface Wire extends Base, Extensible, PolicySubject, Cloneable {
+
+    /**
+     * Returns the source of the wire.
+     * 
+     * @return the source of the wire
+     */
+    ComponentReference getSource();
+
+    /**
+     * Sets the source of the wire.
+     * 
+     * @param source the source of the wire
+     */
+    void setSource(ComponentReference source);
+
+    /**
+     * Returns the target of the wire.
+     * 
+     * @return the target of the wire
+     */
+    ComponentService getTarget();
+
+    /**
+     * Sets the target of the wire.
+     * 
+     * @param target the target of the wire
+     */
+    void setTarget(ComponentService target);
+
+    /**
+     * A boolean value, with the default of "false". When a wire element has
+     * @replace="false", the wire is added to the set of wires which apply to 
+     * the reference identified by the @source attribute. When a wire element 
+     * has @replace="true", the wire is added to the set of wires which apply to 
+     * the reference identified by the @source attribute - but any wires for that 
+     * reference specified by means of the @target attribute of the reference 
+     * are removed from the set of wires which apply to the reference.
+     * 
+     * @return
+     */
+    boolean isReplace();
+
+    /**
+     * Set the replace flag for the wire 
+     * @param replace
+     */
+    void setReplace(boolean replace);
+
+    /**
+     * Returns a clone of the wire.
+     * 
+     * @return a clone of the wire
+     * @throws CloneNotSupportedException
+     */
+    Object clone() throws CloneNotSupportedException;
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/WireFormat.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/WireFormat.java
new file mode 100644
index 0000000000..c622737454
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/WireFormat.java
@@ -0,0 +1,31 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.assembly;
+
+import javax.xml.namespace.QName;
+
+/**
+ * Represents a wireFormat.
+ * 
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.inheritfrom
+ */
+public interface WireFormat extends Base, Cloneable {
+    QName getSchemaName();
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/BindingBuilder.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/BindingBuilder.java
new file mode 100644
index 0000000000..8c56385c9e
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/BindingBuilder.java
@@ -0,0 +1,54 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.assembly.builder;
+
+import javax.xml.namespace.QName;
+
+import org.apache.tuscany.sca.assembly.Binding;
+import org.apache.tuscany.sca.assembly.Component;
+import org.apache.tuscany.sca.assembly.Contract;
+
+/**
+ * A builder that handles any build-time configuration needed by bindings.
+ *
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.inheritfrom
+ */
+public interface BindingBuilder<B extends Binding> {
+
+    /**
+     * Configure a binding.
+     * 
+     * @param component The component for the binding's service or reference
+     * @param contract The binding's service or reference
+     * @param context The context for the builder
+     * @param rebuild Set true to have derived data in the binding rebuilt
+     *                caching can cause problems in the late binding case so we
+     *                need to be able to remove cached data
+     */
+    void build(Component component, Contract contract, B binding, BuilderContext context, boolean rebuild);
+
+    /**
+     * Get QName of the binding type
+     * @return The binding type
+     */
+    QName getBindingType();
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/BuilderContext.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/BuilderContext.java
new file mode 100644
index 0000000000..374c36c1f5
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/BuilderContext.java
@@ -0,0 +1,107 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.assembly.builder;
+
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+
+import javax.xml.namespace.QName;
+
+import org.apache.tuscany.sca.core.ExtensionPointRegistry;
+import org.apache.tuscany.sca.core.UtilityExtensionPoint;
+import org.apache.tuscany.sca.definitions.Definitions;
+import org.apache.tuscany.sca.monitor.DefaultMonitorFactory;
+import org.apache.tuscany.sca.monitor.Monitor;
+import org.apache.tuscany.sca.monitor.MonitorFactory;
+
+/**
+ * Context for builders
+ * @tuscany.spi.extension.asclient
+ */
+public class BuilderContext {
+    protected Definitions definitions;
+    protected Map<QName, List<String>> bindingBaseURIs = Collections.emptyMap();
+    protected Monitor monitor;
+
+    /**
+     * @param definitions
+     * @param bindingBaseURIs
+     * @param monitor
+     */
+    public BuilderContext(Definitions definitions, Map<QName, List<String>> bindingBaseURIs, Monitor monitor) {
+        super();
+        this.definitions = definitions;
+        if (bindingBaseURIs != null) {
+            this.bindingBaseURIs = bindingBaseURIs;
+        }
+        this.monitor = monitor;
+    }
+
+    /**
+     * Create a builder context with the monitor
+     * @param monitor
+     */
+    public BuilderContext(Monitor monitor) {
+        super();
+        this.monitor = monitor;
+    }
+
+    /**
+     * Create a builder context with the extension point registry
+     * @param registry
+     */
+    public BuilderContext(ExtensionPointRegistry registry) {
+        super();
+        MonitorFactory monitorFactory =
+            registry.getExtensionPoint(UtilityExtensionPoint.class).getUtility(MonitorFactory.class);
+        this.monitor = monitorFactory.createMonitor();
+    }
+
+    /**
+     * Create a builder context with a default monitor
+     */
+    public BuilderContext() {
+        super();
+        this.monitor = new DefaultMonitorFactory().createMonitor();
+    }
+
+    public Monitor getMonitor() {
+        return monitor;
+    }
+
+    public Monitor setMonitor(Monitor monitor) {
+        Monitor old = this.monitor;
+        this.monitor = monitor;
+        return old;
+    }
+
+    public Definitions getDefinitions() {
+        return definitions;
+    }
+
+    public Map<QName, List<String>> getBindingBaseURIs() {
+        return bindingBaseURIs;
+    }
+
+    public void setDefinitions(Definitions definitions) {
+        this.definitions = definitions;
+    }
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/BuilderExtensionPoint.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/BuilderExtensionPoint.java
new file mode 100644
index 0000000000..14ae2042d3
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/BuilderExtensionPoint.java
@@ -0,0 +1,149 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.assembly.builder;
+
+import java.util.Collection;
+
+import javax.xml.namespace.QName;
+
+import org.apache.tuscany.sca.assembly.Binding;
+import org.apache.tuscany.sca.assembly.Implementation;
+
+/**
+ * An extension point for Composite builders.
+ *
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.asclient
+ */
+public interface BuilderExtensionPoint {
+    
+    /**
+     * Adds a contract builder.
+     * 
+     * @param compositeBuilder
+     */
+    void addContractBuilder(ContractBuilder contractBuilder);
+
+    /**
+     * Removes a contract builder.
+     *  
+     * @param compositeBuilder
+     */
+    void removeContractBuilder(ContractBuilder contractBuilder);
+
+    /**
+     * Returns the contract builder
+     * 
+     * @param id
+     * @return
+     */
+    ContractBuilder getContractBuilder();    
+
+    /**
+     * Adds a composite builder.
+     * 
+     * @param compositeBuilder
+     */
+    void addCompositeBuilder(CompositeBuilder compositeBuilder);
+
+    /**
+     * Removes a composite builder.
+     *  
+     * @param compositeBuilder
+     */
+    void removeCompositeBuilder(CompositeBuilder compositeBuilder);
+
+    /**
+     * Returns the composite builder with the given id.
+     * 
+     * @param id
+     * @return
+     */
+    CompositeBuilder getCompositeBuilder(String id);
+    
+    /**
+     * Add a binding builder
+     * @param bindingBuilder
+     */
+    void addBindingBuilder(BindingBuilder<?> bindingBuilder);
+
+    /**
+     * Look up a binding builder by the binding type
+     * @param <B>
+     * @param bindingType
+     * @return
+     */
+    <B extends Binding> BindingBuilder<B> getBindingBuilder(QName bindingType);
+
+    /**
+     * Remove a binding builder
+     * @param <B>
+     * @param builder
+     */
+    <B extends Binding> void removeBindingBuilder(BindingBuilder<B> builder);
+
+    /**
+     * Add an implementation builder
+     * @param implementationBuilder
+     */
+    void addImplementationBuilder(ImplementationBuilder<?> implementationBuilder);
+
+    /**
+     * Look up an implementation builder by implementation type
+     * @param <I>
+     * @param implementationType
+     * @return
+     */
+    <I extends Implementation> ImplementationBuilder<I> getImplementationBuilder(QName implementationType);
+
+    /**
+     * Remove an implementation builder
+     * @param <I>
+     * @param builder
+     */
+    <I extends Implementation> void removeImplementationBuilder(ImplementationBuilder<I> builder);
+    
+    /**
+     * Add a policy builder
+     * @param policyBuilder
+     */
+    void addPolicyBuilder(PolicyBuilder<?> policyBuilder);
+
+    /**
+     * Look up a Policy builder by the Policy type
+     * @param <P>
+     * @param policyType
+     * @return
+     */
+    <P> PolicyBuilder<P> getPolicyBuilder(QName policyType);
+
+    /**
+     * Remove a Policy builder
+     * @param <P>
+     * @param builder
+     */
+    <P> void removePolicyBuilder(PolicyBuilder<P> builder);
+    
+    /**
+     * Get a collection of policy builders
+     * @return
+     */
+    public Collection<PolicyBuilder> getPolicyBuilders();
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/CompositeBuilder.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/CompositeBuilder.java
new file mode 100644
index 0000000000..50bf10f54a
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/CompositeBuilder.java
@@ -0,0 +1,51 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.assembly.builder;
+
+import org.apache.tuscany.sca.assembly.Composite;
+
+/**
+ * A builder that handles the configuration of the components inside a
+ * composite and the wiring of component references to component services.
+ *
+ * @version $Rev$ $Date$
+ */
+public interface CompositeBuilder {
+
+    /**
+     * Returns the ID of the builder.
+     * 
+     * @return An ID that identifies the builder
+     */
+    String getID();
+
+    /**
+     * Build a composite.
+     * 
+     * @param composite The composite
+     * @param context The builder context
+     * @return The composite built from the original one. In most cases, it is the same as the orginal one as
+     * most builders only change the content of the composite. 
+     * 
+     * @throws CompositeBuilderException
+     */
+    Composite build(Composite composite, BuilderContext context) throws CompositeBuilderException;
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/CompositeBuilderException.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/CompositeBuilderException.java
new file mode 100644
index 0000000000..5a2015f55e
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/CompositeBuilderException.java
@@ -0,0 +1,45 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.assembly.builder;
+
+/**
+ * Reports a composite builder exception.
+ *
+ * @version $Rev$ $Date$
+ */
+public class CompositeBuilderException extends Exception {
+    private static final long serialVersionUID = -8916323176803443856L;
+
+    public CompositeBuilderException() {
+    }
+
+    public CompositeBuilderException(String message) {
+        super(message);
+    }
+
+    public CompositeBuilderException(Throwable cause) {
+        super(cause);
+    }
+
+    public CompositeBuilderException(String message, Throwable cause) {
+        super(message, cause);
+    }
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/ContractBuilder.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/ContractBuilder.java
new file mode 100644
index 0000000000..99a58dc1c8
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/ContractBuilder.java
@@ -0,0 +1,37 @@
+/*

+ * Licensed to the Apache Software Foundation (ASF) under one

+ * or more contributor license agreements.  See the NOTICE file

+ * distributed with this work for additional information

+ * regarding copyright ownership.  The ASF licenses this file

+ * to you under the Apache License, Version 2.0 (the

+ * "License"); you may not use this file except in compliance

+ * with the License.  You may obtain a copy of the License at

+ * 

+ *   http://www.apache.org/licenses/LICENSE-2.0

+ * 

+ * Unless required by applicable law or agreed to in writing,

+ * software distributed under the License is distributed on an

+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

+ * KIND, either express or implied.  See the License for the

+ * specific language governing permissions and limitations

+ * under the License.    

+ */

+

+package org.apache.tuscany.sca.assembly.builder;

+

+import org.apache.tuscany.sca.assembly.Endpoint;

+import org.apache.tuscany.sca.assembly.EndpointReference;

+import org.apache.tuscany.sca.interfacedef.InterfaceContract;

+

+/**

+ * A builder that builds WSDL versions of component contracts so that the

+ * component contracts can be compared with binding contracts in a generic way.

+ * The generic interface format defined by the Assembly spec is WSDL 1.1

+ */

+public interface ContractBuilder {

+      

+    /**

+     * Build the WSDL version of the Interface Contract

+     */

+    boolean build(InterfaceContract interfaceContract, BuilderContext context);    

+}

diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/DefaultBuilderExtensionPoint.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/DefaultBuilderExtensionPoint.java
new file mode 100644
index 0000000000..8b037a7534
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/DefaultBuilderExtensionPoint.java
@@ -0,0 +1,479 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.tuscany.sca.assembly.builder;
+
+import java.lang.reflect.Constructor;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import javax.xml.namespace.QName;
+
+import org.apache.tuscany.sca.assembly.Binding;
+import org.apache.tuscany.sca.assembly.Component;
+import org.apache.tuscany.sca.assembly.Composite;
+import org.apache.tuscany.sca.assembly.Contract;
+import org.apache.tuscany.sca.assembly.Endpoint;
+import org.apache.tuscany.sca.assembly.EndpointReference;
+import org.apache.tuscany.sca.assembly.Implementation;
+import org.apache.tuscany.sca.core.ExtensionPointRegistry;
+import org.apache.tuscany.sca.core.FactoryExtensionPoint;
+import org.apache.tuscany.sca.core.LifeCycleListener;
+import org.apache.tuscany.sca.core.UtilityExtensionPoint;
+import org.apache.tuscany.sca.extensibility.ServiceDeclaration;
+import org.apache.tuscany.sca.extensibility.ServiceDeclarationParser;
+import org.apache.tuscany.sca.extensibility.ServiceDiscovery;
+import org.apache.tuscany.sca.interfacedef.InterfaceContract;
+import org.apache.tuscany.sca.interfacedef.InterfaceContractMapper;
+
+/**
+ * Default implementation of a provider factory extension point.
+ *
+ * @version $Rev$ $Date$
+ */
+public class DefaultBuilderExtensionPoint implements BuilderExtensionPoint, LifeCycleListener {
+
+    private ExtensionPointRegistry registry;
+    private final Map<String, CompositeBuilder> builders = new HashMap<String, CompositeBuilder>();
+    private final Map<QName, BindingBuilder> bindingBuilders = new HashMap<QName, BindingBuilder>();
+    private final Map<QName, ImplementationBuilder> implementationBuilders =
+        new HashMap<QName, ImplementationBuilder>();
+    private final Map<QName, PolicyBuilder> policyBuilders = new HashMap<QName, PolicyBuilder>();
+    private ContractBuilder contractBuilder  = null;
+
+    private boolean loaded;
+
+    public DefaultBuilderExtensionPoint(ExtensionPointRegistry registry) {
+        this.registry = registry;
+    }
+
+    public void start() {
+    }
+
+    public void stop() {
+        builders.clear();
+        bindingBuilders.clear();
+        implementationBuilders.clear();
+        loaded = false;
+    }
+
+    public void addCompositeBuilder(CompositeBuilder builder) {
+        builders.put(builder.getID(), builder);
+    }
+
+    public void removeCompositeBuilder(CompositeBuilder builder) {
+        builders.remove(builder.getID());
+    }
+
+    public CompositeBuilder getCompositeBuilder(String id) {
+        loadBuilders();
+        return builders.get(id);
+    }
+    
+    public void addContractBuilder(ContractBuilder contractBuilder){ 
+        this.contractBuilder = contractBuilder;
+    }
+
+    public void removeContractBuilder(ContractBuilder contractBuilder){
+        this.contractBuilder = null;
+    }
+
+    public ContractBuilder getContractBuilder(){
+        loadBuilders();
+        return contractBuilder;
+    }
+
+    /**
+     * Load builders declared under META-INF/services.
+     */
+    private synchronized void loadBuilders() {
+        if (loaded)
+            return;
+
+        FactoryExtensionPoint factories = registry.getExtensionPoint(FactoryExtensionPoint.class);
+
+        UtilityExtensionPoint utils = registry.getExtensionPoint(UtilityExtensionPoint.class);
+        InterfaceContractMapper mapper = utils.getUtility(InterfaceContractMapper.class);
+
+        // Get the provider factory service declarations
+        Collection<ServiceDeclaration> builderDeclarations;
+        ServiceDiscovery serviceDiscovery = registry.getServiceDiscovery();
+        try {
+            builderDeclarations = serviceDiscovery.getServiceDeclarations(CompositeBuilder.class.getName());
+        } catch (Exception e) {
+            throw new IllegalStateException(e);
+        }
+
+        for (ServiceDeclaration builderDeclaration : builderDeclarations) {
+            Map<String, String> attributes = builderDeclaration.getAttributes();
+            String id = attributes.get("id");
+
+            CompositeBuilder builder = new LazyCompositeBuilder(id, builderDeclaration, this, factories, mapper);
+            builders.put(id, builder);
+        }
+
+        try {
+            builderDeclarations = serviceDiscovery.getServiceDeclarations(BindingBuilder.class);
+        } catch (Exception e) {
+            throw new IllegalStateException(e);
+        }
+
+        for (ServiceDeclaration builderDeclaration : builderDeclarations) {
+            BindingBuilder<?> builder = new LazyBindingBuilder(builderDeclaration);
+            bindingBuilders.put(builder.getBindingType(), builder);
+        }
+
+        try {
+            builderDeclarations = serviceDiscovery.getServiceDeclarations(ImplementationBuilder.class);
+        } catch (Exception e) {
+            throw new IllegalStateException(e);
+        }
+
+        for (ServiceDeclaration builderDeclaration : builderDeclarations) {
+            ImplementationBuilder<?> builder = new LazyImplementationBuilder(builderDeclaration);
+            implementationBuilders.put(builder.getImplementationType(), builder);
+        }
+        
+        try {
+            builderDeclarations = serviceDiscovery.getServiceDeclarations(PolicyBuilder.class);
+        } catch (Exception e) {
+            throw new IllegalStateException(e);
+        }
+
+        for (ServiceDeclaration builderDeclaration : builderDeclarations) {
+            PolicyBuilder<?> builder = new LazyPolicyBuilder(builderDeclaration);
+            policyBuilders.put(builder.getPolicyType(), builder);
+        }
+        
+        try {
+            builderDeclarations = serviceDiscovery.getServiceDeclarations(ContractBuilder.class);
+        } catch (Exception e) {
+            throw new IllegalStateException(e);
+        }
+        
+        for (ServiceDeclaration builderDeclaration : builderDeclarations) {
+            contractBuilder = new LazyContractBuilder(builderDeclaration);
+        }
+
+
+        loaded = true;
+
+    }
+
+    public void addBindingBuilder(BindingBuilder<?> bindingBuilder) {
+        bindingBuilders.put(bindingBuilder.getBindingType(), bindingBuilder);
+    }
+    
+    public <B extends Binding> BindingBuilder<B> getBindingBuilder(QName bindingType) {
+        loadBuilders();
+        return (BindingBuilder<B>)bindingBuilders.get(bindingType);
+    }
+
+    public <B extends Binding> void removeBindingBuilder(BindingBuilder<B> builder) {
+        bindingBuilders.remove(builder.getBindingType());
+    }
+
+    public void addImplementationBuilder(ImplementationBuilder<?> implementationBuilder) {
+        implementationBuilders.put(implementationBuilder.getImplementationType(), implementationBuilder);
+    }
+
+    public <I extends Implementation> ImplementationBuilder<I> getImplementationBuilder(QName implementationType) {
+        loadBuilders();
+        return (ImplementationBuilder<I>)implementationBuilders.get(implementationType);
+    }
+
+    public <I extends Implementation> void removeImplementationBuilder(ImplementationBuilder<I> builder) {
+        implementationBuilders.remove(builder.getImplementationType());
+    }
+
+    public void addPolicyBuilder(PolicyBuilder<?> policyBuilder) {
+        policyBuilders.put(policyBuilder.getPolicyType(), policyBuilder);
+    }
+
+    public <B> PolicyBuilder<B> getPolicyBuilder(QName policyType) {
+        loadBuilders();
+        return (PolicyBuilder<B>)policyBuilders.get(policyType);
+    }
+    
+    public Collection<PolicyBuilder> getPolicyBuilders() {
+        loadBuilders();
+        return policyBuilders.values();
+    }
+
+    public <B> void removePolicyBuilder(PolicyBuilder<B> builder) {
+        policyBuilders.remove(builder.getPolicyType());
+    }
+    
+    /**
+     * A wrapper around a composite builder allowing lazy
+     * loading and initialization of implementation providers.
+     */
+    private class LazyCompositeBuilder implements CompositeBuilder {
+
+        private FactoryExtensionPoint factories;
+        private InterfaceContractMapper mapper;
+        private String id;
+        private ServiceDeclaration builderDeclaration;
+        private CompositeBuilder builder;
+        private BuilderExtensionPoint builders;
+
+        private LazyCompositeBuilder(String id,
+                                     ServiceDeclaration factoryDeclaration,
+                                     BuilderExtensionPoint builders,
+                                     FactoryExtensionPoint factories,
+                                     InterfaceContractMapper mapper) {
+            this.id = id;
+            this.builderDeclaration = factoryDeclaration;
+            this.builders = builders;
+            this.factories = factories;
+            this.mapper = mapper;
+        }
+
+        public String getID() {
+            return id;
+        }
+
+        public Composite build(Composite composite, BuilderContext context)
+            throws CompositeBuilderException {
+            return getBuilder().build(composite, context);
+        }
+
+        private CompositeBuilder getBuilder() {
+            if (builder == null) {
+                try {
+                    Class<CompositeBuilder> builderClass = (Class<CompositeBuilder>)builderDeclaration.loadClass();
+                    try {
+                        Constructor<CompositeBuilder> constructor =
+                            builderClass.getConstructor(FactoryExtensionPoint.class, InterfaceContractMapper.class);
+                        builder = constructor.newInstance(factories, mapper);
+                    } catch (NoSuchMethodException e) {
+                        try {
+                            Constructor<CompositeBuilder> constructor =
+                                builderClass.getConstructor(BuilderExtensionPoint.class,
+                                                            FactoryExtensionPoint.class,
+                                                            InterfaceContractMapper.class);
+                            builder = constructor.newInstance(builders, factories, mapper);
+                        } catch (NoSuchMethodException ex) {
+                            Constructor<CompositeBuilder> constructor =
+                                builderClass.getConstructor(ExtensionPointRegistry.class);
+                            builder = constructor.newInstance(registry);
+                        }
+                    }
+                } catch (Exception e) {
+                    throw new IllegalStateException(e);
+                }
+            }
+            return builder;
+        }
+
+    }
+
+    private class LazyBindingBuilder implements BindingBuilder {
+        private ServiceDeclaration sd;
+        private BindingBuilder<?> builder;
+        private QName qname;;
+
+        /**
+         * @param sd
+         */
+        public LazyBindingBuilder(ServiceDeclaration sd) {
+            super();
+            this.sd = sd;
+            this.qname = ServiceDeclarationParser.getQName(sd.getAttributes().get("qname"));
+        }
+
+        public void build(Component component, Contract contract, Binding binding, BuilderContext context, boolean rebuild) {
+            getBuilder().build(component, contract, binding, context, rebuild);
+        }
+
+        public QName getBindingType() {
+            return qname;
+        }
+
+
+        private synchronized BindingBuilder getBuilder() {
+            if (builder == null) {
+                try {
+                    Class<?> builderClass = sd.loadClass();
+                    try {
+                        Constructor<?> constructor = builderClass.getConstructor(ExtensionPointRegistry.class);
+                        builder = (BindingBuilder)constructor.newInstance(registry);
+                    } catch (NoSuchMethodException e) {
+                        Constructor<?> constructor = builderClass.getConstructor();
+                        builder = (BindingBuilder)constructor.newInstance();
+
+                    }
+                } catch (Exception e) {
+                    throw new IllegalStateException(e);
+                }
+            }
+            return builder;
+        }
+
+    }
+
+    private class LazyImplementationBuilder implements ImplementationBuilder {
+        private ServiceDeclaration sd;
+        private ImplementationBuilder<?> builder;
+        private QName qname;;
+
+        /**
+         * @param sd
+         */
+        public LazyImplementationBuilder(ServiceDeclaration sd) {
+            super();
+            this.sd = sd;
+            this.qname = ServiceDeclarationParser.getQName(sd.getAttributes().get("qname"));
+        }
+
+        public void build(Component component, Implementation implementation, BuilderContext context) {
+            getBuilder().build(component, implementation, context);
+        }
+
+        public QName getImplementationType() {
+            return qname;
+        }
+
+        private synchronized ImplementationBuilder getBuilder() {
+            if (builder == null) {
+                try {
+                    Class<?> builderClass = sd.loadClass();
+                    try {
+                        Constructor<?> constructor = builderClass.getConstructor(ExtensionPointRegistry.class);
+                        builder = (ImplementationBuilder)constructor.newInstance(registry);
+                    } catch (NoSuchMethodException e) {
+                        Constructor<?> constructor = builderClass.getConstructor();
+                        builder = (ImplementationBuilder)constructor.newInstance();
+
+                    }
+                } catch (Exception e) {
+                    throw new IllegalStateException(e);
+                }
+            }
+            return builder;
+        }
+
+    }
+
+    private class LazyPolicyBuilder implements PolicyBuilder {
+        private ServiceDeclaration sd;
+        private PolicyBuilder<?> builder;
+        private QName qname;;
+
+        /**
+         * @param sd
+         */
+        public LazyPolicyBuilder(ServiceDeclaration sd) {
+            super();
+            this.sd = sd;
+            this.qname = ServiceDeclarationParser.getQName(sd.getAttributes().get("qname"));
+        }
+
+        public boolean build(Component component, Implementation implementation, BuilderContext context) {
+            return getBuilder().build(component, implementation, context);
+        }
+
+        public QName getPolicyType() {
+            return qname;
+        }
+        
+        public List<QName> getSupportedBindings() {
+            return getBuilder().getSupportedBindings();
+        }
+        
+        private synchronized PolicyBuilder getBuilder() {
+            if (builder == null) {
+                try {
+                    Class<?> builderClass = sd.loadClass();
+                    try {
+                        Constructor<?> constructor = builderClass.getConstructor(ExtensionPointRegistry.class);
+                        builder = (PolicyBuilder)constructor.newInstance(registry);
+                    } catch (NoSuchMethodException e) {
+                        Constructor<?> constructor = builderClass.getConstructor();
+                        builder = (PolicyBuilder)constructor.newInstance();
+
+                    }
+                } catch (Exception e) {
+                    throw new IllegalStateException(e);
+                }
+            }
+            return builder;
+        }
+
+        public boolean build(Endpoint endpoint, BuilderContext context) {
+            return getBuilder().build(endpoint, context);
+        }
+
+        public boolean build(org.apache.tuscany.sca.assembly.EndpointReference endpointReference, BuilderContext context) {
+            return getBuilder().build(endpointReference, context);
+        }
+
+        public boolean build(EndpointReference endpointReference, Endpoint endpoint, BuilderContext context) {
+            return getBuilder().build(endpointReference, endpoint, context);
+        }      
+    }
+    
+    private class LazyContractBuilder implements ContractBuilder {
+        private ServiceDeclaration sd;
+        private ContractBuilder builder;
+
+        /**
+         * @param sd
+         */
+        public LazyContractBuilder(ServiceDeclaration sd) {
+            super();
+            this.sd = sd;
+        }
+        
+/*        
+        public boolean build(EndpointReference endpointReference, BuilderContext context){
+            return getBuilder().build(endpointReference, context);
+        }
+        
+        public boolean build(Endpoint endpoint, BuilderContext context){
+            return getBuilder().build(endpoint, context);
+        }
+*/        
+        
+        public boolean build(InterfaceContract interfaceContract, BuilderContext context){
+            return getBuilder().build(interfaceContract, context);
+        }        
+        
+        private synchronized ContractBuilder getBuilder() {
+            if (builder == null) {
+                try {
+                    Class<?> builderClass = sd.loadClass();
+                    try {
+                        Constructor<?> constructor = builderClass.getConstructor(ExtensionPointRegistry.class);
+                        builder = (ContractBuilder)constructor.newInstance(registry);
+                    } catch (NoSuchMethodException e) {
+                        Constructor<?> constructor = builderClass.getConstructor();
+                        builder = (ContractBuilder)constructor.newInstance();
+
+                    }
+                } catch (Exception e) {
+                    throw new IllegalStateException(e);
+                }
+            }
+            return builder;
+        } 
+    }    
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/ImplementationBuilder.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/ImplementationBuilder.java
new file mode 100644
index 0000000000..d47c3d9032
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/ImplementationBuilder.java
@@ -0,0 +1,50 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.assembly.builder;
+
+import javax.xml.namespace.QName;
+
+import org.apache.tuscany.sca.assembly.Component;
+import org.apache.tuscany.sca.assembly.Implementation;
+
+/**
+ * A builder that handles any build-time configuration needed by implementations.
+ *
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.inheritfrom
+ */
+public interface ImplementationBuilder<I extends Implementation> {
+
+    /**
+     * Configure a component implementation.
+     * 
+     * @param component The component 
+     * @param context TODO
+     * @param contract The implementation
+     */
+    void build(Component component, I implmentation, BuilderContext context);
+
+    /**
+     * Get the QName of the implementation type
+     * @return
+     */
+    QName getImplementationType();
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/Messages.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/Messages.java
new file mode 100644
index 0000000000..4f2842c61a
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/Messages.java
@@ -0,0 +1,31 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.assembly.builder;
+
+/**
+ * Constants for resource bundle names
+ */
+public interface Messages {
+    String RESOURCE_PACKAGE = "org.apache.tuscany.sca.assembly.builder.";
+    String ASSEMBLY_VALIDATION = RESOURCE_PACKAGE + "assembly-validation-messages";
+    String ASSEMBLY_CONFORMANCE = RESOURCE_PACKAGE + "assembly-conformance-messages";
+    String DEFINITIONS_VALIDATION = RESOURCE_PACKAGE + "definitions-validation-messages";
+    String BUILDER_VALIDATION_BUNDLE = "org.apache.tuscany.sca.builder.builder-validation-messages";
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/PolicyBuilder.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/PolicyBuilder.java
new file mode 100644
index 0000000000..423c856973
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/PolicyBuilder.java
@@ -0,0 +1,84 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.assembly.builder;
+
+import java.util.List;
+
+import javax.xml.namespace.QName;
+
+import org.apache.tuscany.sca.assembly.Component;
+import org.apache.tuscany.sca.assembly.Endpoint;
+import org.apache.tuscany.sca.assembly.EndpointReference;
+import org.apache.tuscany.sca.assembly.Implementation;
+
+/**
+ * A builder that is contributed by a specific policy language to validate the configurations
+ * for SCA endpoints, endpoint references and component implementations
+ * @tuscany.spi.extension.inheritfrom
+ */
+public interface PolicyBuilder<T> {
+    /**
+     * Get the policy type
+     * @return
+     */
+    QName getPolicyType();
+    
+    /** 
+     * Return the list of binding type QNames at which this policy implementation
+     * is targeted. Or null if the policy is not binding specific
+     * @return list of binding type QNames at which this policy implementation or null if it's not binding specific
+     */
+    List<QName> getSupportedBindings();
+
+    /**
+     * Build (and validate) the policy settings on the endpoint
+     * @param endpoint
+     * @param monitor
+     * @return true if the policy setting is compatible
+     */
+    boolean build(Endpoint endpoint, BuilderContext context);
+
+    /**
+     * Build (and validate) the policy settings on the endpoint reference
+     * @param endpointReference
+     * @param monitor
+     * @return true if the policy setting is compatible
+     */
+    boolean build(EndpointReference endpointReference, BuilderContext context);
+
+    /**
+     * Build (and validate) the policy settings on the component implementation
+     * @param component
+     * @param implementation
+     * @param monitor
+     * @return true if the policy setting is compatible
+     */
+    boolean build(Component component, Implementation implementation, BuilderContext context);
+    
+    /**
+     * Build (and validate) the policy settings on the endpoint reference is compatible with the endpoint
+     * @param endpointReference 
+     * @param endpoint
+     * @param context
+     * @return if the policy setting is compatible
+     */
+    boolean build(EndpointReference endpointReference, Endpoint endpoint, BuilderContext context);
+ 
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/WireBuilder.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/WireBuilder.java
new file mode 100644
index 0000000000..2bfbe85664
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/WireBuilder.java
@@ -0,0 +1,39 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.assembly.builder;
+
+import org.apache.tuscany.sca.assembly.Endpoint;
+import org.apache.tuscany.sca.assembly.EndpointReference;
+
+/**
+ * A builder that connects an endpoint reference to an endpoint
+ */
+public interface WireBuilder {
+    /**
+     * Build the endpoint reference against the endpoint. If the endpoint is a valid target for the
+     * endpoint reference, the wire buidler can populate some information from the endpoint into the 
+     * endpoint reference (such as targetEndpoint, policySets or requiredIntents)
+     * @param endpointReference
+     * @param endpoint
+     * @param context
+     * @return true if the endpoint is a valid target for the endpoint reference
+     */
+    boolean build(EndpointReference endpointReference, Endpoint endpoint, BuilderContext context);
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/AbstractPropertyImpl.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/AbstractPropertyImpl.java
new file mode 100644
index 0000000000..24dc20f815
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/AbstractPropertyImpl.java
@@ -0,0 +1,112 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.assembly.impl;
+
+import javax.xml.namespace.QName;
+
+import org.apache.tuscany.sca.assembly.AbstractProperty;
+import org.apache.tuscany.sca.interfacedef.DataType;
+
+/**
+ * Represents an abstract property.
+ * 
+ * @version $Rev$ $Date$
+ */
+public class AbstractPropertyImpl extends ExtensibleImpl implements AbstractProperty {
+    protected Object value;
+    protected String name;
+    protected QName xsdType;
+    protected QName xsdElement;
+    protected boolean many;
+    protected boolean mustSupply;
+    protected DataType dataType;
+    protected Object xsdDefinition;
+
+    /**
+     * Constructs a new abstract property.
+     */
+    protected AbstractPropertyImpl() {
+    }
+
+    public Object getValue() {
+        return value;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public QName getXSDElement() {
+        return xsdElement;
+    }
+
+    public QName getXSDType() {
+        return xsdType;
+    }
+
+    public boolean isMany() {
+        return many;
+    }
+
+    public boolean isMustSupply() {
+        return mustSupply;
+    }
+
+    public void setValue(Object defaultValue) {
+        this.value = defaultValue;
+    }
+
+    public void setMany(boolean many) {
+        this.many = many;
+    }
+
+    public void setMustSupply(boolean mustSupply) {
+        this.mustSupply = mustSupply;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public void setXSDElement(QName element) {
+        this.xsdElement = element;
+    }
+
+    public void setXSDType(QName type) {
+        this.xsdType = type;
+    }
+
+    public DataType getDataType() {
+        return dataType;
+    }
+
+    public void setDataType(DataType dataType) {
+        this.dataType = dataType;
+    }
+    
+    public Object getXSDDefinition() {
+        return xsdDefinition;
+    }
+    
+    public void setXSDDefinition(Object xsdDefinition) {
+        this.xsdDefinition = xsdDefinition;
+    }
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/AbstractReferenceImpl.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/AbstractReferenceImpl.java
new file mode 100644
index 0000000000..3e44f5f7ae
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/AbstractReferenceImpl.java
@@ -0,0 +1,46 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.assembly.impl;
+
+import org.apache.tuscany.sca.assembly.AbstractReference;
+import org.apache.tuscany.sca.assembly.Multiplicity;
+
+/**
+ * Represents an abstract reference
+ * 
+ * @version $Rev$ $Date$
+ */
+public class AbstractReferenceImpl extends ContractImpl implements AbstractReference {
+    private Multiplicity multiplicity = Multiplicity.ONE_ONE;
+
+    /**
+     * Constructs a new abstract reference.
+     */
+    protected AbstractReferenceImpl() {
+    }
+
+    public Multiplicity getMultiplicity() {
+        return multiplicity;
+    }
+
+    public void setMultiplicity(Multiplicity multiplicity) {
+        this.multiplicity = multiplicity;
+    }
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/AbstractServiceImpl.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/AbstractServiceImpl.java
new file mode 100644
index 0000000000..24b1a0e03e
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/AbstractServiceImpl.java
@@ -0,0 +1,36 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.assembly.impl;
+
+import org.apache.tuscany.sca.assembly.AbstractService;
+
+/**
+ * Represents an abstract service
+ * 
+ * @version $Rev$ $Date$
+ */
+public class AbstractServiceImpl extends ContractImpl implements AbstractService {
+
+    /**
+     * Constructs a new abstract service.
+     */
+    protected AbstractServiceImpl() {
+    }
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/AssemblyFactoryImpl.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/AssemblyFactoryImpl.java
new file mode 100644
index 0000000000..0759ff1361
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/AssemblyFactoryImpl.java
@@ -0,0 +1,138 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.tuscany.sca.assembly.impl;
+
+import org.apache.tuscany.sca.assembly.AbstractProperty;
+import org.apache.tuscany.sca.assembly.AbstractReference;
+import org.apache.tuscany.sca.assembly.AbstractService;
+import org.apache.tuscany.sca.assembly.AssemblyFactory;
+import org.apache.tuscany.sca.assembly.Callback;
+import org.apache.tuscany.sca.assembly.Component;
+import org.apache.tuscany.sca.assembly.ComponentProperty;
+import org.apache.tuscany.sca.assembly.ComponentReference;
+import org.apache.tuscany.sca.assembly.ComponentService;
+import org.apache.tuscany.sca.assembly.ComponentType;
+import org.apache.tuscany.sca.assembly.Composite;
+import org.apache.tuscany.sca.assembly.CompositeReference;
+import org.apache.tuscany.sca.assembly.CompositeService;
+import org.apache.tuscany.sca.assembly.ConfiguredOperation;
+import org.apache.tuscany.sca.assembly.Endpoint;
+import org.apache.tuscany.sca.assembly.EndpointReference;
+import org.apache.tuscany.sca.assembly.Extension;
+import org.apache.tuscany.sca.assembly.Property;
+import org.apache.tuscany.sca.assembly.Reference;
+import org.apache.tuscany.sca.assembly.Service;
+import org.apache.tuscany.sca.assembly.Wire;
+import org.apache.tuscany.sca.core.ExtensionPointRegistry;
+
+/**
+ * A factory for the assembly model.
+ *
+ * @version $Rev$ $Date$
+ */
+public abstract class AssemblyFactoryImpl implements AssemblyFactory {
+
+    protected ExtensionPointRegistry registry;
+
+    protected AssemblyFactoryImpl(ExtensionPointRegistry registry) {
+        super();
+        this.registry = registry;
+    }
+
+    public AbstractProperty createAbstractProperty() {
+        return new AbstractPropertyImpl();
+    }
+
+    public AbstractReference createAbstractReference() {
+        return new AbstractReferenceImpl();
+    }
+
+    public AbstractService createAbstractService() {
+        return new AbstractServiceImpl();
+    }
+
+    public Callback createCallback() {
+        return new CallbackImpl();
+    }
+
+    public Component createComponent() {
+        return new ComponentImpl();
+    }
+
+    public ComponentProperty createComponentProperty() {
+        return new ComponentPropertyImpl();
+    }
+
+    public ComponentReference createComponentReference() {
+        return new ComponentReferenceImpl();
+    }
+
+    public ComponentService createComponentService() {
+        return new ComponentServiceImpl();
+    }
+
+    public ComponentType createComponentType() {
+        return new ComponentTypeImpl();
+    }
+
+    public Composite createComposite() {
+        return new CompositeImpl();
+    }
+
+    public CompositeReference createCompositeReference() {
+        return new CompositeReferenceImpl();
+    }
+
+    public CompositeService createCompositeService() {
+        return new CompositeServiceImpl();
+    }
+
+    public Property createProperty() {
+        return new PropertyImpl();
+    }
+
+    public Reference createReference() {
+        return new ReferenceImpl();
+    }
+
+    public Service createService() {
+        return new ServiceImpl();
+    }
+
+    public Wire createWire() {
+        return new WireImpl();
+    }
+
+    public Extension createExtension() {
+        return new ExtensionImpl();
+    }
+
+    public Endpoint createEndpoint() {
+        return new EndpointImpl(registry);
+    }
+
+    public EndpointReference createEndpointReference() {
+        return new EndpointReferenceImpl(registry);
+    }
+
+    public ConfiguredOperation createConfiguredOperation() {
+        return new ConfiguredOperationImpl();
+    }
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/BaseImpl.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/BaseImpl.java
new file mode 100644
index 0000000000..516b11724f
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/BaseImpl.java
@@ -0,0 +1,45 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.assembly.impl;
+
+import org.apache.tuscany.sca.assembly.Base;
+
+/**
+ * Convenience base class for assembly model objects.
+ * 
+ * @version $Rev$ $Date$
+ */
+public abstract class BaseImpl implements Base {
+    private boolean unresolved;
+
+    /**
+     * Constructs a new base model object.
+     */
+    protected BaseImpl() {
+    }
+
+    public boolean isUnresolved() {
+        return unresolved;
+    }
+
+    public void setUnresolved(boolean undefined) {
+        this.unresolved = undefined;
+    }
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/BindingImpl.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/BindingImpl.java
new file mode 100644
index 0000000000..d912606f1d
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/BindingImpl.java
@@ -0,0 +1,122 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.tuscany.sca.assembly.impl;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import javax.xml.namespace.QName;
+
+import org.apache.tuscany.sca.assembly.Binding;
+import org.apache.tuscany.sca.assembly.OperationSelector;
+import org.apache.tuscany.sca.assembly.WireFormat;
+import org.apache.tuscany.sca.policy.ExtensionType;
+import org.apache.tuscany.sca.policy.Intent;
+import org.apache.tuscany.sca.policy.PolicySet;
+
+/**
+ * Base Binding implementation class
+ */
+public abstract class BindingImpl extends ExtensibleImpl implements Binding {
+    private String name;
+    private ExtensionType extensionType;
+    private String uri;
+    private List<Intent> requiredIntents = new ArrayList<Intent>();
+    private List<PolicySet> policySets = new ArrayList<PolicySet>();
+
+    protected QName type;
+
+    protected BindingImpl(QName type) {
+        super();
+        this.type = type;
+    }
+
+    public QName getType() {
+        return type;
+    }
+
+    public List<Intent> getRequiredIntents() {
+        return requiredIntents;
+    }
+
+    public List<PolicySet> getPolicySets() {
+        return policySets;
+    }
+
+    @Override
+    public Object clone() throws CloneNotSupportedException {
+        return super.clone();
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public ExtensionType getExtensionType() {
+        return extensionType;
+    }
+
+    public void setExtensionType(ExtensionType type) {
+        this.extensionType = type;
+    }
+
+    public String getURI() {
+        return uri;
+    }
+
+    public void setURI(String uri) {
+        this.uri = uri;
+    }
+    
+    public OperationSelector getOperationSelector() {
+        return null;
+    }
+
+    public WireFormat getRequestWireFormat() {
+        return null;
+    }
+
+    public WireFormat getResponseWireFormat() {
+        return null;
+    }
+
+    public void setOperationSelector(OperationSelector operationSelector) {
+    }
+
+    public void setRequestWireFormat(WireFormat wireFormat) {
+    }
+
+    public void setResponseWireFormat(WireFormat wireFormat) {
+    }
+
+    public String toString() {
+        StringBuffer buf = new StringBuffer();
+        buf.append(getType()).append(" (");
+        buf.append("uri=").append(getURI());
+        buf.append(",name=").append(getName());
+        buf.append(")");
+        return buf.toString();
+    }
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/CallbackImpl.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/CallbackImpl.java
new file mode 100644
index 0000000000..dec68d1413
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/CallbackImpl.java
@@ -0,0 +1,77 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.assembly.impl;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.tuscany.sca.assembly.Binding;
+import org.apache.tuscany.sca.assembly.Callback;
+import org.apache.tuscany.sca.assembly.Contract;
+import org.apache.tuscany.sca.policy.ExtensionType;
+import org.apache.tuscany.sca.policy.Intent;
+import org.apache.tuscany.sca.policy.PolicySet;
+
+/**
+ * Represents a reference.
+ * 
+ * @version $Rev$ $Date$
+ */
+public class CallbackImpl extends ExtensibleImpl implements Callback {
+    private List<Binding> bindings = new ArrayList<Binding>();
+    private List<Intent> requiredIntents = new ArrayList<Intent>();
+    private List<PolicySet> policySets = new ArrayList<PolicySet>();
+    private Contract parentContract;
+
+    public List<PolicySet> getPolicySets() {
+        return policySets;
+    }
+
+    public List<Intent> getRequiredIntents() {
+        return requiredIntents;
+    }
+
+    protected CallbackImpl() {
+    }
+
+    public List<Binding> getBindings() {
+        return bindings;
+    }
+
+    public ExtensionType getExtensionType() {
+        return null;
+    }
+
+    public void setExtensionType(ExtensionType type) {
+    }
+
+    public void setRequiredIntents(List<Intent> intents) {
+        this.requiredIntents = intents;
+    }
+    
+    public Contract getParentContract() {
+        return parentContract;
+    }
+    
+    public void setParentContract(Contract contract) {
+        this.parentContract = contract;
+    }
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ComponentImpl.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ComponentImpl.java
new file mode 100644
index 0000000000..8a03df339c
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ComponentImpl.java
@@ -0,0 +1,186 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.assembly.impl;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.tuscany.sca.assembly.Component;
+import org.apache.tuscany.sca.assembly.ComponentProperty;
+import org.apache.tuscany.sca.assembly.ComponentReference;
+import org.apache.tuscany.sca.assembly.ComponentService;
+import org.apache.tuscany.sca.assembly.Composite;
+import org.apache.tuscany.sca.assembly.Implementation;
+import org.apache.tuscany.sca.policy.ExtensionType;
+import org.apache.tuscany.sca.policy.Intent;
+import org.apache.tuscany.sca.policy.PolicySet;
+
+/**
+ * Represents a component.
+ * 
+ * @version $Rev$ $Date$
+ */
+public class ComponentImpl extends ExtensibleImpl implements Component, Cloneable {
+    private Implementation implementation;
+    private String name;
+    private String uri;
+    private List<ComponentProperty> properties = new ArrayList<ComponentProperty>();
+    private List<ComponentReference> references = new ArrayList<ComponentReference>();
+    private List<ComponentService> services = new ArrayList<ComponentService>();
+    private List<Intent> requiredIntents = new ArrayList<Intent>();
+    private List<PolicySet> policySets = new ArrayList<PolicySet>();
+    private Boolean autowire;
+    private ExtensionType type;
+
+    /**
+     * Constructs a new component.
+     */
+    protected ComponentImpl() {
+    }
+
+    @Override
+    public Object clone() throws CloneNotSupportedException {
+        ComponentImpl clone = (ComponentImpl)super.clone();
+
+        clone.properties = new ArrayList<ComponentProperty>();
+        for (ComponentProperty property : getProperties()) {
+            clone.properties.add((ComponentProperty)property.clone());
+        }
+        clone.references = new ArrayList<ComponentReference>();
+        for (ComponentReference reference : getReferences()) {
+            clone.references.add((ComponentReference)reference.clone());
+        }
+        clone.services = new ArrayList<ComponentService>();
+        for (ComponentService service : getServices()) {
+            clone.services.add((ComponentService)service.clone());
+        }
+        
+        // Clone the implementation.composite
+        if(implementation instanceof Composite) {
+            clone.implementation = (Composite) ((Composite) implementation).clone();
+        }
+        
+        // Clone the Lists for intents and policySets
+        clone.requiredIntents = new ArrayList<Intent>(getRequiredIntents());
+        clone.policySets = new ArrayList<PolicySet>(getPolicySets());
+        
+        return clone;
+    }
+
+    public String getURI() {
+        return uri;
+    }
+
+    public void setURI(String uri) {
+        this.uri = uri;
+    }
+
+    public Implementation getImplementation() {
+        return implementation;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public List<ComponentProperty> getProperties() {
+        return properties;
+    }
+    
+    public ComponentProperty getProperty(String name) {
+        for (ComponentProperty property : getProperties()) {
+            if (property.getName().equals(name)) {
+                return property;
+            }
+        }
+        return null;
+    }
+
+    public List<ComponentReference> getReferences() {
+        return references;
+    }
+    
+    public ComponentReference getReference(String name){
+        for (ComponentReference ref : getReferences()){
+            if (ref.getName().equals(name)){
+                return ref;
+            }
+        }
+        return null;
+    }      
+
+    public List<ComponentService> getServices() {
+        return services;
+    }
+    
+    public ComponentService getService(String name) {
+        for (ComponentService service : getServices()) {
+            if (service.getName().equals(name)) {
+                return service;
+            }
+        }
+        return null;
+    }
+
+    public void setImplementation(Implementation implementation) {
+        this.implementation = implementation;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public List<Intent> getRequiredIntents() {
+        return requiredIntents;
+    }
+
+    public List<PolicySet> getPolicySets() {
+        return policySets;
+    }
+
+    public boolean isAutowire() {
+        return (autowire == null) ? false : autowire.booleanValue();
+    }
+
+    public void setAutowire(Boolean autowire) {
+        this.autowire = autowire;
+    }
+
+    public Boolean getAutowire() {
+        return autowire;
+    }
+
+    public ExtensionType getExtensionType() {
+        return type;
+    }
+
+    public void setExtensionType(ExtensionType type) {
+        this.type = type;
+    }
+    
+    public String toString() {
+        StringBuffer buf = new StringBuffer("Component (");
+        buf.append("uri=").append(uri);
+        buf.append(",name=").append(name);
+        buf.append(",implementation=").append(implementation);
+        buf.append(")");
+        return buf.toString();
+    }
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ComponentPropertyImpl.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ComponentPropertyImpl.java
new file mode 100644
index 0000000000..9db522930f
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ComponentPropertyImpl.java
@@ -0,0 +1,97 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.assembly.impl;
+
+import javax.xml.xpath.XPathExpression;
+
+import org.apache.tuscany.sca.assembly.ComponentProperty;
+import org.apache.tuscany.sca.assembly.Property;
+
+/**
+ * Represents a component property.
+ * 
+ * @version $Rev$ $Date$
+ */
+public class ComponentPropertyImpl extends PropertyImpl implements ComponentProperty, Cloneable {
+    private String file;
+    private Property property;
+    private String source;
+    private XPathExpression sourceXPathExpression;
+
+    /**
+     * Constructs a new component property.
+     */
+    protected ComponentPropertyImpl() {
+    }
+
+    @Override
+    public Object clone() throws CloneNotSupportedException {
+        return super.clone();
+    }
+
+    // FIXME getValue should not delegate to property.getValue()
+    // Doing this violates the setValue/getValue semantics, as you
+    // can call setValue() then get a different value from getValue()
+    @Override
+    public Object getValue() {
+        if (super.getValue() == null && property != null) {
+            return property.getValue();
+        } else {
+            return super.getValue();
+        }
+    }
+
+    public String getFile() {
+        return file;
+    }
+
+    public Property getProperty() {
+        return property;
+    }
+
+    public String getSource() {
+        return source;
+    }
+
+    public void setFile(String file) {
+        this.file = file;
+    }
+
+    public void setProperty(Property property) {
+        this.property = property;
+    }
+
+    public void setSource(String source) {
+        this.source = source;
+    }
+
+    public XPathExpression getSourceXPathExpression() {
+        return sourceXPathExpression;
+    }
+
+    public void setSourceXPathExpression(XPathExpression sourceXPathExpression) {
+        this.sourceXPathExpression = sourceXPathExpression;
+    }
+    
+    public String toString() {
+    	return "Property: " + getName() + " Value: " + getValue();
+    } // end method toString
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ComponentReferenceImpl.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ComponentReferenceImpl.java
new file mode 100644
index 0000000000..78b54668b3
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ComponentReferenceImpl.java
@@ -0,0 +1,119 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.assembly.impl;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.tuscany.sca.assembly.Binding;
+import org.apache.tuscany.sca.assembly.ComponentReference;
+import org.apache.tuscany.sca.assembly.ComponentService;
+import org.apache.tuscany.sca.assembly.CompositeReference;
+import org.apache.tuscany.sca.assembly.Reference;
+import org.apache.tuscany.sca.interfacedef.InterfaceContract;
+
+/**
+ * Represents a component reference
+ * 
+ * @version $Rev$ $Date$
+ */
+public class ComponentReferenceImpl extends ReferenceImpl implements ComponentReference, Cloneable {
+    private Reference reference;
+    private Boolean autowire;
+    private boolean nonOverridable;
+    private List<CompositeReference> promotedAs = new ArrayList<CompositeReference>();
+    private ComponentService callbackService;
+    private boolean isPromoted = false;
+
+    /**
+     * Constructs a new component reference.
+     */
+    protected ComponentReferenceImpl() {
+        // Set multiplicity to null so that by default it'll inherit from the Reference
+        setMultiplicity(null);
+    }
+
+    @Override
+    public Object clone() throws CloneNotSupportedException {
+        return super.clone();
+    }
+
+    public Reference getReference() {
+        return reference;
+    }
+
+    public void setReference(Reference reference) {
+        this.reference = reference;
+    }
+
+    public boolean isAutowire() {
+        return (autowire == null) ? false : autowire.booleanValue();
+    }
+
+    public void setAutowire(Boolean autowire) {
+        this.autowire = autowire;
+    }
+
+    public Boolean getAutowire() {
+        return autowire;
+    }
+
+    public List<CompositeReference> promotedAs() {
+        return promotedAs;
+    }
+
+    public ComponentService getCallbackService() {
+        return callbackService;
+    }
+
+    public void setCallbackService(ComponentService callbackService) {
+        this.callbackService = callbackService;
+    }
+
+    /**
+     * Use endpoint information to work out what the interface contract for the
+     * binding is. 
+     */
+    @Override
+    public InterfaceContract getInterfaceContract(Binding binding) {
+        InterfaceContract interfaceContract = null;
+
+        if (interfaceContract == null) {
+            interfaceContract = getInterfaceContract();
+        }
+        return interfaceContract;
+    }
+
+    public boolean isNonOverridable() {
+        return nonOverridable;
+    }
+
+    public void setNonOverridable(boolean nonOverridable) {
+        this.nonOverridable = nonOverridable;
+    }
+
+    public void setPromoted(boolean isPromoted) {
+        this.isPromoted = isPromoted;
+    } // end method setPromoted
+
+    public boolean isPromoted() {
+        return isPromoted;
+    }
+} // end class ComponentReferenceImpl
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ComponentServiceImpl.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ComponentServiceImpl.java
new file mode 100644
index 0000000000..f8c9f53413
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ComponentServiceImpl.java
@@ -0,0 +1,71 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.assembly.impl;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.tuscany.sca.assembly.ComponentReference;
+import org.apache.tuscany.sca.assembly.ComponentService;
+import org.apache.tuscany.sca.assembly.CompositeService;
+import org.apache.tuscany.sca.assembly.Service;
+
+/**
+ * Represents a component service
+ * 
+ * @version $Rev$ $Date$
+ */
+public class ComponentServiceImpl extends ServiceImpl implements ComponentService, Cloneable {
+    private Service service;
+    private List<CompositeService> promotedAs = new ArrayList<CompositeService>();
+    private ComponentReference callbackReference;
+
+    /**
+     * Constructs a new component service.
+     */
+    protected ComponentServiceImpl() {
+    }
+
+    @Override
+    public Object clone() throws CloneNotSupportedException {
+        return super.clone();
+    }
+
+    public Service getService() {
+        return service;
+    }
+
+    public void setService(Service service) {
+        this.service = service;
+    }
+
+    public List<CompositeService> promotedAs() {
+        return promotedAs;
+    }
+
+    public ComponentReference getCallbackReference() {
+        return callbackReference;
+    }
+
+    public void setCallbackReference(ComponentReference callbackReference) {
+        this.callbackReference = callbackReference;
+    }
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ComponentTypeImpl.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ComponentTypeImpl.java
new file mode 100644
index 0000000000..b52c65ef8b
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ComponentTypeImpl.java
@@ -0,0 +1,176 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.assembly.impl;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.tuscany.sca.assembly.ComponentType;
+import org.apache.tuscany.sca.assembly.Property;
+import org.apache.tuscany.sca.assembly.Reference;
+import org.apache.tuscany.sca.assembly.Service;
+import org.apache.tuscany.sca.policy.ExtensionType;
+import org.apache.tuscany.sca.policy.Intent;
+import org.apache.tuscany.sca.policy.PolicySet;
+
+/** 
+ * Represents a component type.
+ * 
+ * @version $Rev$ $Date$
+ */
+public class ComponentTypeImpl extends ExtensibleImpl implements ComponentType, Cloneable {
+    private String uri;
+    private List<Property> properties = new ArrayList<Property>();
+    private List<Reference> references = new ArrayList<Reference>();
+    private List<Service> services = new ArrayList<Service>();
+    private List<Intent> requiredIntents = new ArrayList<Intent>();
+    private List<PolicySet> policySets = new ArrayList<PolicySet>();
+
+    /**
+     * Constructs a new component type.
+     */
+    protected ComponentTypeImpl() {
+    }
+
+    @Override
+    public Object clone() throws CloneNotSupportedException {
+        ComponentTypeImpl clone = (ComponentTypeImpl)super.clone();
+
+        clone.services = new ArrayList<Service>();
+        for (Service service : getServices()) {
+            clone.services.add((Service)service.clone());
+        }
+        clone.references = new ArrayList<Reference>();
+        for (Reference reference : getReferences()) {
+            clone.references.add((Reference)reference.clone());
+        }
+        clone.properties = new ArrayList<Property>();
+        for (Property property : getProperties()) {
+            clone.properties.add((Property)property.clone());
+        }
+        clone.requiredIntents = new ArrayList<Intent>(requiredIntents);
+        clone.policySets = new ArrayList<PolicySet>(policySets);
+        return clone;
+    }
+
+    public String getURI() {
+        return uri;
+    }
+
+    public void setURI(String uri) {
+        this.uri = uri;
+    }
+
+    public List<Property> getProperties() {
+        return properties;
+    }
+    
+    public Property getProperty(String name){
+        Property property = null;
+        
+        for (Property tmp : getProperties()){
+            if (tmp.getName().equals(name)){
+                property = tmp;
+                break;
+            }
+        }
+        
+        return property;
+    }
+
+    public List<Reference> getReferences() {
+        return references;
+    }
+    
+    public Reference getReference(String name){
+        Reference reference = null;
+        
+        for (Reference tmp : getReferences()){
+            if (tmp.getName().equals(name)){
+                reference = tmp;
+                break;
+            }
+        }
+        
+        return reference;
+    }    
+
+    public List<Service> getServices() {
+        return services;
+    }
+    
+    public Service getService(String name){
+        Service service = null;
+        
+        for (Service tmp : getServices()){
+            if (tmp.getName().equals(name)){
+                service = tmp;
+                break;
+            }
+        }
+        
+        return service;
+    }  
+
+
+    public List<Intent> getRequiredIntents() {
+        return requiredIntents;
+    }
+
+    public List<PolicySet> getPolicySets() {
+        return policySets;
+    }
+
+    public ExtensionType getExtensionType() {
+        return null;
+    }
+
+    public void setExtensionType(ExtensionType type) {
+    }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((uri == null) ? 0 : uri.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (getClass() != obj.getClass()) {
+            return false;
+        }
+        ComponentTypeImpl other = (ComponentTypeImpl)obj;
+        if (uri == null) {
+            if (other.uri != null) {
+                return false;
+            }
+        } else if (!uri.equals(other.uri)) {
+            return false;
+        }
+        return true;
+    }
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/CompositeImpl.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/CompositeImpl.java
new file mode 100644
index 0000000000..fba6af7e7f
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/CompositeImpl.java
@@ -0,0 +1,185 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.tuscany.sca.assembly.impl;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import javax.xml.namespace.QName;
+
+import org.apache.tuscany.sca.assembly.Component;
+import org.apache.tuscany.sca.assembly.ComponentReference;
+import org.apache.tuscany.sca.assembly.Composite;
+import org.apache.tuscany.sca.assembly.CompositeReference;
+import org.apache.tuscany.sca.assembly.CompositeService;
+import org.apache.tuscany.sca.assembly.Reference;
+import org.apache.tuscany.sca.assembly.Service;
+import org.apache.tuscany.sca.assembly.Wire;
+
+/**
+ * Implementation of a Composite.
+ *
+ * @version $Rev$ $Date$
+ */
+public class CompositeImpl extends ImplementationImpl implements Composite, Cloneable {
+    private String specVersion = "undefined";
+    private List<Component> components = new ArrayList<Component>();
+    private List<Composite> includes = new ArrayList<Composite>();
+    private QName name;
+    private List<Wire> wires = new ArrayList<Wire>();
+    private Boolean autowire;
+    private boolean local = true;
+
+    /**
+     * Constructs a new composite.
+     */
+    protected CompositeImpl() {
+        super(TYPE);
+    }
+
+    @Override
+    public Object clone() throws CloneNotSupportedException {
+        CompositeImpl clone = (CompositeImpl)super.clone();
+
+        // clone the child components
+        clone.components = new ArrayList<Component>();
+        for (Component component : getComponents()) {
+            Component clonedComponent = (Component)component.clone();
+            clone.components.add(clonedComponent);
+        }
+        
+        // reset the references and services so the get re-resolved
+        for (Service service : clone.getServices()) {
+            CompositeService compositeService = (CompositeService)service;
+            // Force the promoted component/service to be rebuilt against the clone
+            if (compositeService.getPromotedComponent() != null) {
+                compositeService.getPromotedComponent().setUnresolved(true);
+            }
+            if (compositeService.getPromotedService() != null) {
+                compositeService.getPromotedService().setUnresolved(true);
+            }
+        }
+        for (Reference reference : clone.getReferences()) {
+            CompositeReference compositeReference = (CompositeReference)reference;
+            for (ComponentReference ref : compositeReference.getPromotedReferences()) {
+                // Force the promoted reference to be rebuilt against the clone
+                ref.setUnresolved(true);
+            }
+        }
+        
+        // clone the wires
+        clone.wires = new ArrayList<Wire>();
+        for (Wire wire : getWires()) {
+            clone.wires.add((Wire)wire.clone());
+        }
+        
+        // Clone the includes 
+        clone.includes = new ArrayList<Composite>();
+        for (Composite included : getIncludes()) {
+            clone.includes.add((Composite)included.clone());
+        }
+        return clone;
+    }
+
+    public String getSpecVersion() {
+        return specVersion;
+    }
+
+    public void setSpecVersion(String specVersion) {
+        this.specVersion = specVersion;
+    }
+
+    public List<Component> getComponents() {
+        return components;
+    }
+    
+    public Component getComponent(String name) {
+        Component component = null;
+        
+        for (Component tmp : getComponents()){
+            if (tmp.getName().equals(name)){
+                component = tmp;
+                break;
+            }
+        }
+        return component;
+    }
+
+    public List<Composite> getIncludes() {
+        return includes;
+    }
+
+    public QName getName() {
+        return name;
+    }
+
+    public List<Wire> getWires() {
+        return wires;
+    }
+
+    public boolean isLocal() {
+        return local;
+    }
+
+    public void setLocal(boolean local) {
+        this.local = local;
+    }
+
+    public boolean isAutowire() {
+        return (autowire == null) ? false : autowire.booleanValue();
+    }
+
+    public void setAutowire(Boolean autowire) {
+        this.autowire = autowire;
+    }
+
+    public Boolean getAutowire() {
+        return autowire;
+    }
+
+    public void setName(QName name) {
+        this.name = name;
+    }
+
+    @Override
+    public int hashCode() {
+        return String.valueOf(getName()).hashCode();
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (obj == this) {
+            return true;
+        } else if (obj instanceof Composite) {
+            if (getName() != null) {
+                return getName().equals(((Composite)obj).getName());
+            } else {
+                return ((Composite)obj).getName() == null;
+            }
+        } else {
+            return false;
+        }
+    }
+
+    @Override
+    public String toString() {
+        return "Composite (name=" + getName() + ")";
+    }
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/CompositeReferenceImpl.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/CompositeReferenceImpl.java
new file mode 100644
index 0000000000..ae5fad461b
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/CompositeReferenceImpl.java
@@ -0,0 +1,63 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.assembly.impl;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.tuscany.sca.assembly.Component;
+import org.apache.tuscany.sca.assembly.ComponentReference;
+import org.apache.tuscany.sca.assembly.CompositeReference;
+
+/**
+ * Represents a composite reference.
+ * 
+ * @version $Rev$ $Date$
+ */
+public class CompositeReferenceImpl extends ReferenceImpl implements CompositeReference, Cloneable {
+    private List<Component> promotedComponents = new ArrayList<Component>();
+    private List<ComponentReference> promotedReferences = new ArrayList<ComponentReference>();
+
+    /**
+     * Constructs a new composite reference.
+     */
+    protected CompositeReferenceImpl() {
+    }
+
+    @Override
+    public Object clone() throws CloneNotSupportedException {
+        CompositeReferenceImpl copy = (CompositeReferenceImpl)super.clone();
+        copy.promotedComponents = new ArrayList<Component>(promotedComponents);
+        copy.promotedReferences = new ArrayList<ComponentReference>(promotedReferences);
+        return copy;
+    }
+
+    public List<ComponentReference> getPromotedReferences() {
+        return promotedReferences;
+    }
+
+    public List<Component> getPromotedComponents() {
+        return promotedComponents;
+    }
+
+    public String toString() {
+        return getName();
+    }
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/CompositeServiceImpl.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/CompositeServiceImpl.java
new file mode 100644
index 0000000000..55b48ec578
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/CompositeServiceImpl.java
@@ -0,0 +1,62 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.assembly.impl;
+
+import org.apache.tuscany.sca.assembly.Component;
+import org.apache.tuscany.sca.assembly.ComponentService;
+import org.apache.tuscany.sca.assembly.CompositeService;
+
+/**
+ * Represents a composite service
+ * 
+ * @version $Rev$ $Date$
+ */
+public class CompositeServiceImpl extends ServiceImpl implements CompositeService, Cloneable {
+    private ComponentService promotedService;
+    private Component promotedComponent;
+
+    /**
+     * Constructs a new composite service.
+     */
+    protected CompositeServiceImpl() {
+    }
+
+    @Override
+    public Object clone() throws CloneNotSupportedException {
+        return super.clone();
+    }
+
+    public ComponentService getPromotedService() {
+        return promotedService;
+    }
+
+    public void setPromotedService(ComponentService promotedService) {
+        this.promotedService = promotedService;
+    }
+
+    public Component getPromotedComponent() {
+        return promotedComponent;
+    }
+
+    public void setPromotedComponent(Component promotedComponent) {
+        this.promotedComponent = promotedComponent;
+    }
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ConfiguredOperationImpl.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ConfiguredOperationImpl.java
new file mode 100644
index 0000000000..80c1c7cd21
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ConfiguredOperationImpl.java
@@ -0,0 +1,95 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.assembly.impl;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.tuscany.sca.assembly.ConfiguredOperation;
+import org.apache.tuscany.sca.policy.ExtensionType;
+import org.apache.tuscany.sca.policy.Intent;
+import org.apache.tuscany.sca.policy.PolicySet;
+
+/**
+ * Represents an Operation.
+ *
+ * @version $Rev$ $Date$
+ */
+public class ConfiguredOperationImpl extends BaseImpl implements ConfiguredOperation {
+    private List<PolicySet> policySets = new ArrayList<PolicySet>();
+    private List<Intent> requiredIntents = new ArrayList<Intent>();
+    private List<PolicySet> applicablePolicySets = new ArrayList<PolicySet>();
+    
+    private String name;
+    private String contractName;
+    private ExtensionType type;
+
+    /**
+     * Constructs a new Operation.
+     */
+    protected ConfiguredOperationImpl() {
+    }
+    
+    public List<PolicySet> getPolicySets() {
+        return policySets;
+    }
+    
+    public void setPolicySets(List<PolicySet> policySets) {
+        this.policySets = policySets; 
+    }
+    
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+    
+    public List<Intent> getRequiredIntents() {
+        return requiredIntents;
+    }
+    
+    public void setRequiredIntents(List<Intent> intents) {
+        this.requiredIntents = intents;
+    }
+
+    public String getContractName() {
+        return contractName;
+    }
+
+    public void setContractName(String contractName) {
+        this.contractName = contractName;
+    }
+
+    public List<PolicySet> getApplicablePolicySets() {
+        return applicablePolicySets;
+    }
+
+    public ExtensionType getExtensionType() {
+        return type;
+    }
+
+    public void setExtensionType(ExtensionType type) {
+        this.type = type;
+    }
+    
+    
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ContractImpl.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ContractImpl.java
new file mode 100644
index 0000000000..2b72f1f047
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ContractImpl.java
@@ -0,0 +1,88 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.assembly.impl;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.tuscany.sca.assembly.AbstractContract;
+import org.apache.tuscany.sca.interfacedef.InterfaceContract;
+import org.apache.tuscany.sca.policy.ExtensionType;
+import org.apache.tuscany.sca.policy.Intent;
+import org.apache.tuscany.sca.policy.PolicySet;
+
+/**
+ * Implementation of a Contract.
+ *
+ * @version $Rev$ $Date$
+ */
+public class ContractImpl extends ExtensibleImpl implements AbstractContract {
+    private InterfaceContract interfaceContract;
+    private String name;
+    private List<Intent> requiredIntents = new ArrayList<Intent>();
+    private List<PolicySet> policySets = new ArrayList<PolicySet>();
+
+    private boolean isCallback = false;
+
+    /**
+     * Constructs a new contract.
+     */
+    protected ContractImpl() {
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public InterfaceContract getInterfaceContract() {
+        return interfaceContract;
+    }
+
+    public void setInterfaceContract(InterfaceContract interfaceContract) {
+        this.interfaceContract = interfaceContract;
+    }
+
+    public List<Intent> getRequiredIntents() {
+        return requiredIntents;
+    }
+
+    public boolean isForCallback() {
+        return isCallback;
+    }
+
+    public void setForCallback(boolean isCallback) {
+        this.isCallback = isCallback;
+    }
+
+    public ExtensionType getExtensionType() {
+        return null;
+    }
+
+    public void setExtensionType(ExtensionType type) {
+    }
+
+    public List<PolicySet> getPolicySets() {
+        return policySets;
+    }
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/EndpointImpl.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/EndpointImpl.java
new file mode 100644
index 0000000000..f4a8429f13
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/EndpointImpl.java
@@ -0,0 +1,298 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.sca.assembly.impl;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.tuscany.sca.assembly.Binding;
+import org.apache.tuscany.sca.assembly.Component;
+import org.apache.tuscany.sca.assembly.ComponentService;
+import org.apache.tuscany.sca.assembly.Endpoint;
+import org.apache.tuscany.sca.assembly.EndpointReference;
+import org.apache.tuscany.sca.assembly.builder.BuilderExtensionPoint;
+import org.apache.tuscany.sca.assembly.builder.ContractBuilder;
+import org.apache.tuscany.sca.core.ExtensionPointRegistry;
+import org.apache.tuscany.sca.interfacedef.InterfaceContract;
+import org.apache.tuscany.sca.policy.ExtensionType;
+import org.apache.tuscany.sca.policy.Intent;
+import org.apache.tuscany.sca.policy.PolicySet;
+import org.apache.tuscany.sca.policy.PolicySubject;
+
+/**
+ * The assembly model object for an endpoint.
+ *
+ * @version $Rev$ $Date$
+ */
+public class EndpointImpl implements Endpoint {
+    private static final long serialVersionUID = 7344399683703812593L;
+
+    protected transient ExtensionPointRegistry registry;
+    protected transient BuilderExtensionPoint builders;
+    protected transient ContractBuilder contractBuilder; 
+    protected boolean unresolved;
+    protected String uri;
+    protected Component component;
+    protected ComponentService service;
+    protected Binding binding;
+    protected InterfaceContract interfaceContract;
+    protected List<EndpointReference> callbackEndpointReferences = new ArrayList<EndpointReference>();
+    protected List<PolicySet> policySets = new ArrayList<PolicySet>();
+    protected List<Intent> requiredIntents = new ArrayList<Intent>();
+    protected boolean remote = false;
+
+    protected EndpointImpl(ExtensionPointRegistry registry) {
+        this.registry = registry;
+    }
+
+    @Override
+    public Object clone() throws CloneNotSupportedException {
+        return super.clone();
+    }
+
+    public boolean isUnresolved() {
+        return unresolved;
+    }
+
+    public void setUnresolved(boolean unresolved) {
+        this.unresolved = unresolved;
+    }
+
+    public Component getComponent() {
+        resolve();
+        return component;
+    }
+
+    public void setComponent(Component component) {
+        this.component = component;
+        reset();
+    }
+
+    public ComponentService getService() {
+        resolve();
+        return service;
+    }
+
+    public void setService(ComponentService service) {
+        this.service = service;
+        reset();
+    }
+
+    public Binding getBinding() {
+        resolve();
+        return binding;
+    }
+
+    public void setBinding(Binding binding) {
+        this.binding = binding;
+        reset();
+    }
+
+    public InterfaceContract getComponentServiceInterfaceContract() {
+        resolve();
+        if (interfaceContract == null && service != null) {
+            interfaceContract = service.getInterfaceContract();
+        }
+        return interfaceContract;
+    }
+
+    public void setInterfaceContract(InterfaceContract interfaceContract) {
+        this.interfaceContract = interfaceContract;
+    }
+
+    /**
+     * Get the services callbacl enpoint references that
+     * represent endpoint references from which callbacks
+     * originate
+     *
+     * @return callbackEndpoint the reference callback endpoint
+     */
+    public List<EndpointReference> getCallbackEndpointReferences() {
+        resolve();
+        return callbackEndpointReferences;
+    }
+
+    public List<PolicySet> getPolicySets() {
+        resolve();
+        return policySets;
+    }
+
+    public List<Intent> getRequiredIntents() {
+        resolve();
+        return requiredIntents;
+    }
+
+    public ExtensionType getExtensionType() {
+        getBinding();
+        if (binding instanceof PolicySubject) {
+            return ((PolicySubject)binding).getExtensionType();
+        }
+        return null;
+    }
+
+    public void setExtensionType(ExtensionType type) {
+        throw new UnsupportedOperationException();
+    }
+    
+    public String toStringWithoutHash() {
+        String output = "Endpoint: ";
+        
+        if (getURI() != null) {
+            output += " URI = " + getURI();
+        }
+
+        if (unresolved) {
+            output += " [Unresolved]";
+        }
+
+        return output;
+    }
+
+    public String toString() {
+        return "(@" + this.hashCode() + ")" + toStringWithoutHash();
+    }
+
+    public String getURI() {
+        if (uri == null) {
+            if (component != null && service != null && binding != null) {
+                String bindingName = binding.getName();
+                if (bindingName == null) {
+                    bindingName = service.getName();
+                }
+                uri = component.getURI() + "#service-binding(" + service.getName() + "/" + bindingName + ")";
+            } else if (component != null && service != null) {
+                uri = component.getURI() + "#service(" + service.getName() + ")";
+            } else if (component != null) {
+                uri = component.getURI();
+            }
+        }
+        return uri;
+    }
+
+    public void setURI(String uri) {
+        this.uri = uri;
+    }
+
+    protected void resolve() {
+    }
+
+    protected void reset() {
+        this.uri = null;
+    }
+
+    protected void setExtensionPointRegistry(ExtensionPointRegistry registry) {
+        this.registry = registry;
+    }
+
+    public boolean isRemote() {
+        return remote;
+    }
+
+    public void setRemote(boolean remote) {
+        this.remote = remote;
+    }
+
+    public boolean matches(String serviceURI) {
+        String[] parts1 = parseServiceURI(serviceURI);
+        String[] parts2 = parseStructuralURI(getURI());
+        for (int i = 0; i < parts1.length; i++) {
+            if (parts1[i] == null || parts1[i].equals(parts2[i])) {
+                continue;
+            } else {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    /**
+     * Parse the service URI into an array of names. The service URI is in one of the following formats:
+     * <ul>
+     * <li>componentName
+     * <li>componentName/serviceName
+     * <li>componentName/serviceName/bindingName
+     * </ul> 
+     * @param serviceURI
+     * @return
+     */
+    private static String[] parseServiceURI(String serviceURI) {
+        if (serviceURI.startsWith("/")) {
+            serviceURI = serviceURI.substring(1);
+        }
+        if (serviceURI.contains("#")) {
+            return parseStructuralURI(serviceURI);
+        }
+        String[] names = new String[3];
+        String[] segments = serviceURI.split("/");
+        for (int i = 0; i < names.length && i < segments.length; i++) {
+            names[i] = segments[i];
+        }
+        return names;
+    }
+
+    /**
+     * Parse the structural URI into an array of parts (componentURI, serviceName, bindingName)
+     * @param structuralURI
+     * @return [0]: componentURI [1]: serviceName [2]: bindingName
+     */
+    private static String[] parseStructuralURI(String structuralURI) {
+        String[] names = new String[3];
+        int index = structuralURI.lastIndexOf('#');
+        if (index == -1) {
+            names[0] = structuralURI;
+        } else {
+            names[0] = structuralURI.substring(0, index);
+            String str = structuralURI.substring(index + 1);
+            if (str.startsWith("service-binding(") && str.endsWith(")")) {
+                str = str.substring("service-binding(".length(), str.length() - 1);
+                String[] parts = str.split("/");
+                if (parts.length != 2) {
+                    throw new IllegalArgumentException("Invalid service-binding URI: " + structuralURI);
+                }
+                names[1] = parts[0];
+                names[2] = parts[1];
+            } else if (str.startsWith("service(") && str.endsWith(")")) {
+                str = str.substring("service(".length(), str.length() - 1);
+                // [rfeng] Deal with empty service name
+                if (!"".equals(str)) {
+                    names[1] = str;
+                }
+            } else {
+                throw new IllegalArgumentException("Invalid structural URI: " + structuralURI);
+            }
+        }
+        return names;
+    }
+    
+    public boolean isAsyncInvocation() {
+        if (service.getName().endsWith("_asyncCallback")){
+            // this is a response service at the reference component so don't create a
+            // response reference. 
+            return false;
+        }
+        
+        for(Intent intent : getRequiredIntents()){
+            if (intent.getName().getLocalPart().equals("asyncInvocation")){
+                return true;
+            }
+        }
+        return false;
+    }
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/EndpointReferenceImpl.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/EndpointReferenceImpl.java
new file mode 100644
index 0000000000..96af9373cd
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/EndpointReferenceImpl.java
@@ -0,0 +1,248 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.sca.assembly.impl;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.tuscany.sca.assembly.Binding;
+import org.apache.tuscany.sca.assembly.Component;
+import org.apache.tuscany.sca.assembly.ComponentReference;
+import org.apache.tuscany.sca.assembly.Endpoint;
+import org.apache.tuscany.sca.assembly.EndpointReference;
+import org.apache.tuscany.sca.assembly.builder.BuilderExtensionPoint;
+import org.apache.tuscany.sca.assembly.builder.ContractBuilder;
+import org.apache.tuscany.sca.core.ExtensionPointRegistry;
+import org.apache.tuscany.sca.interfacedef.InterfaceContract;
+import org.apache.tuscany.sca.policy.ExtensionType;
+import org.apache.tuscany.sca.policy.Intent;
+import org.apache.tuscany.sca.policy.PolicySet;
+import org.apache.tuscany.sca.policy.PolicySubject;
+
+/**
+ * The assembly model object for an endpoint.
+ *
+ * @version $Rev$ $Date$
+ */
+public class EndpointReferenceImpl implements EndpointReference {
+    private static final long serialVersionUID = 8838066441709300972L;
+
+    protected transient ExtensionPointRegistry registry;
+    protected transient BuilderExtensionPoint builders;
+    protected transient ContractBuilder contractBuilder;    
+    protected boolean unresolved = true;
+    protected String uri;
+    protected Component component;
+    protected ComponentReference reference;
+    protected Binding binding;
+    protected List<PolicySet> policySets = new ArrayList<PolicySet>();
+    protected List<Intent> requiredIntents = new ArrayList<Intent>();
+    protected InterfaceContract interfaceContract;
+    protected Status status = Status.NOT_CONFIGURED;
+
+    // the target of the endpoint reference
+    protected Endpoint targetEndpoint;
+
+    // callback endpoint that messages across this reference
+    // will be directed toward
+    protected Endpoint callbackEndpoint;
+
+    protected EndpointReferenceImpl(ExtensionPointRegistry registry) {
+        this.registry = registry;
+    }
+
+    @Override
+    public Object clone() throws CloneNotSupportedException {
+        EndpointReference cloned = (EndpointReference)super.clone();
+
+        if (targetEndpoint != null) {
+            cloned.setTargetEndpoint((Endpoint)targetEndpoint.clone());
+        }
+
+        return cloned;
+    }
+
+    public boolean isUnresolved() {
+        return unresolved;
+    }
+
+    public void setUnresolved(boolean unresolved) {
+        this.unresolved = unresolved;
+    }
+
+    public Component getComponent() {
+        resolve();
+        return component;
+    }
+
+    public void setComponent(Component component) {
+        this.component = component;
+        reset();
+    }
+
+    public ComponentReference getReference() {
+        resolve();
+        return reference;
+    }
+
+    public void setReference(ComponentReference reference) {
+        this.reference = reference;
+        reset();
+    }
+
+    public Binding getBinding() {
+        resolve();
+        return binding;
+    }
+
+    public void setBinding(Binding binding) {
+        this.binding = binding;
+        reset();
+    }
+
+    public Endpoint getTargetEndpoint() {
+        resolve();
+        return targetEndpoint;
+    }
+
+    public void setTargetEndpoint(Endpoint targetEndpoint) {
+        this.targetEndpoint = targetEndpoint;
+        reset();
+    }
+
+    public InterfaceContract getComponentReferenceInterfaceContract() {
+        resolve();
+        if (interfaceContract == null && reference != null) {
+            interfaceContract = reference.getInterfaceContract();
+        }
+        return interfaceContract;
+    }
+
+    public void setInterfaceContract(InterfaceContract interfaceContract) {
+        this.interfaceContract = interfaceContract;
+        reset();
+    }
+
+    public List<PolicySet> getPolicySets() {
+        resolve();
+        return policySets;
+    }
+
+    public List<Intent> getRequiredIntents() {
+        resolve();
+        return requiredIntents;
+    }
+
+    public ExtensionType getExtensionType() {
+        getBinding();
+        if (binding instanceof PolicySubject) {
+            return ((PolicySubject)binding).getExtensionType();
+        }
+        return null;
+    }
+
+    public void setExtensionType(ExtensionType type) {
+        throw new UnsupportedOperationException();
+    }
+
+    public Endpoint getCallbackEndpoint() {
+        resolve();
+        return callbackEndpoint;
+    }
+
+    public void setCallbackEndpoint(Endpoint callbackEndpoint) {
+        this.callbackEndpoint = callbackEndpoint;
+        reset();
+    }
+    
+    public String toStringWithoutHash() {
+        StringBuffer output = new StringBuffer("EndpointReference: ");
+
+        if (getURI() != null) {
+            output.append(" URI = ").append(getURI());
+        }
+
+        output.append(" ").append(status);
+
+        if (targetEndpoint != null) {
+            output.append(" Target = ").append(targetEndpoint);
+        }
+
+        return output.toString();
+    }
+
+    public String toString() {
+        return "(@" + this.hashCode() + ")" + toStringWithoutHash();
+    }
+
+    public String getURI() {
+        if (uri == null) {
+            if (component != null && reference != null && binding != null) {
+                String bindingName = binding.getName();
+                if (bindingName == null) {
+                    bindingName = reference.getName();
+                }
+                uri = component.getURI() + "#reference-binding(" + reference.getName() + "/" + bindingName + ")";
+            } else if (component != null && reference != null) {
+                uri = component.getURI() + "#reference(" + reference.getName() + ")";
+            } else if (component != null) {
+                uri = component.getURI();
+            }
+        }
+        return uri;
+    }
+
+    public void setURI(String uri) {
+        this.uri = uri;
+    }
+
+    protected void resolve() {
+    }
+
+    protected void reset() {
+        this.uri = null;
+    }
+
+    public void setExtensionPointRegistry(ExtensionPointRegistry registry) {
+        this.registry = registry;
+    }
+
+    public Status getStatus() {
+        return status;
+    }
+
+    public void setStatus(Status status) {
+        this.status = status;
+    }
+    
+    public boolean isAsyncInvocation() {
+        if (reference.getName().endsWith("_asyncCallback")){
+            // this is a response reference at the service component so don't create a
+            // response service. The response service will be at the reference component
+            return false;
+        }
+        
+        for(Intent intent : getRequiredIntents()){
+            if (intent.getName().getLocalPart().equals("asyncInvocation")){
+                return true;
+            }
+        }
+        return false;
+    }
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ExtensibleImpl.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ExtensibleImpl.java
new file mode 100644
index 0000000000..340fa2854c
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ExtensibleImpl.java
@@ -0,0 +1,49 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.assembly.impl;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.tuscany.sca.assembly.Extensible;
+import org.apache.tuscany.sca.assembly.Extension;
+
+/**
+ * Convenience base class for extensible assembly model objects.
+ * 
+ * @version $Rev$ $Date$
+ */
+public abstract class ExtensibleImpl extends BaseImpl implements Extensible {
+    private List<Object> extensions = new ArrayList<Object>();
+    private List<Extension> attributeExtensions = new ArrayList<Extension>();
+
+    /**
+     * Constructs a new base model object.
+     */
+    protected ExtensibleImpl() {
+    }
+
+    public List<Object> getExtensions() {
+        return extensions;
+    }
+
+    public List<Extension> getAttributeExtensions() {
+        return attributeExtensions;
+    }
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ExtensionImpl.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ExtensionImpl.java
new file mode 100644
index 0000000000..e69eb4a771
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ExtensionImpl.java
@@ -0,0 +1,62 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.assembly.impl;
+
+import javax.xml.namespace.QName;
+
+import org.apache.tuscany.sca.assembly.Extension;
+
+public class ExtensionImpl implements Extension {
+    private QName qName;
+    private Object value;
+    private boolean isAttribute = false;
+
+    public ExtensionImpl() {
+    }
+
+    public ExtensionImpl(QName qName, Object value, boolean isAttribute) {
+        this.qName = qName;
+        this.value = value;
+        this.isAttribute = isAttribute;
+    }
+
+    public QName getQName() {
+        return qName;
+    }
+
+    public void setQName(QName qName) {
+        this.qName = qName;
+    }
+
+    public <T> T getValue() {
+        return (T)value;
+    }
+
+    public <T> void setValue(T value) {
+        this.value = value;
+    }
+
+    public boolean isAttribute() {
+        return isAttribute;
+    }
+
+    public void setAttribute(boolean isAttribute) {
+        this.isAttribute = isAttribute;
+    }
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ImplementationImpl.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ImplementationImpl.java
new file mode 100644
index 0000000000..f943438a9f
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ImplementationImpl.java
@@ -0,0 +1,89 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.tuscany.sca.assembly.impl;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import javax.xml.namespace.QName;
+
+import org.apache.tuscany.sca.assembly.Implementation;
+import org.apache.tuscany.sca.interfacedef.Operation;
+import org.apache.tuscany.sca.policy.ExtensionType;
+import org.apache.tuscany.sca.policy.PolicySubject;
+
+/**
+ * Base implementation class of Implementation model interface
+ *
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.inheritfrom
+ */
+public abstract class ImplementationImpl extends ComponentTypeImpl implements Implementation, PolicySubject {
+    protected QName type;
+    protected ExtensionType extensionType;
+    protected List<Operation> operations = new ArrayList<Operation>();
+
+    protected ImplementationImpl(QName type) {
+        super();
+        this.type = type;
+    }
+
+    public ExtensionType getExtensionType() {
+        return extensionType;
+    }
+
+    public void setExtensionType(ExtensionType extensionType) {
+        this.extensionType = extensionType;
+    }
+
+    public QName getType() {
+        return type;
+    }
+    
+    public String toString() {
+        return String.valueOf(getType());
+    }
+
+    public List<Operation> getOperations() {
+        return operations;
+    }
+
+    @Override
+    public Object clone() throws CloneNotSupportedException {
+        ImplementationImpl impl = (ImplementationImpl)super.clone();
+        impl.operations = new ArrayList<Operation>();
+        for (Operation operation : operations) {
+            impl.operations.add((Operation)operation.clone());
+        }
+        return impl;
+    }
+
+    // Override the ComponentTypeImpl.hashCode()
+    @Override
+    public int hashCode() {
+        return System.identityHashCode(this);
+    }
+
+    // Override the ComponentTypeImpl.equals()
+    @Override
+    public boolean equals(Object obj) {
+        return this == obj;
+    }
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/PropertyImpl.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/PropertyImpl.java
new file mode 100644
index 0000000000..263af296b1
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/PropertyImpl.java
@@ -0,0 +1,59 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.assembly.impl;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.tuscany.sca.assembly.Property;
+import org.apache.tuscany.sca.policy.PolicySet;
+
+/**
+ * Represents a property.
+ * 
+ * @version $Rev$ $Date$
+ */
+public class PropertyImpl extends AbstractPropertyImpl implements Property, Cloneable {
+    private List<PolicySet> policySets = new ArrayList<PolicySet>();
+    private List<PolicySet> applicablePolicySets = new ArrayList<PolicySet>();
+
+    /**
+     * Constructs a new property.
+     */
+    protected PropertyImpl() {
+    }
+
+    @Override
+    public Object clone() throws CloneNotSupportedException {
+        return super.clone();
+    }
+
+    public List<PolicySet> getPolicySets() {
+        return policySets;
+    }
+
+    public void setPolicySets(List<PolicySet> policySets) {
+        this.policySets = policySets;
+    }
+
+    public List<PolicySet> getApplicablePolicySets() {
+        return applicablePolicySets;
+    }
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ReferenceImpl.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ReferenceImpl.java
new file mode 100644
index 0000000000..69d76f238d
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ReferenceImpl.java
@@ -0,0 +1,135 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.assembly.impl;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.tuscany.sca.assembly.Binding;
+import org.apache.tuscany.sca.assembly.Callback;
+import org.apache.tuscany.sca.assembly.ComponentReference;
+import org.apache.tuscany.sca.assembly.ComponentService;
+import org.apache.tuscany.sca.assembly.EndpointReference;
+import org.apache.tuscany.sca.assembly.Reference;
+import org.apache.tuscany.sca.interfacedef.InterfaceContract;
+
+/**
+ * Represents a reference.
+ * 
+ * @version $Rev$ $Date$
+ */
+public class ReferenceImpl extends AbstractReferenceImpl implements Reference, Cloneable {
+    private List<Binding> bindings = new ArrayList<Binding>();
+    private boolean wiredByImpl;
+    private List<ComponentService> targets = new ArrayList<ComponentService>();
+    private Callback callback;
+    private boolean overridingBindings;
+    private List<EndpointReference> endpointReferences = new ArrayList<EndpointReference>();
+
+    /**
+     * Constructs a new reference.
+     */
+    protected ReferenceImpl() {
+    }
+
+    @Override
+    public Object clone() throws CloneNotSupportedException {
+        ReferenceImpl clone = (ReferenceImpl)super.clone();
+        clone.bindings = new ArrayList<Binding>(bindings);
+        clone.targets = new ArrayList<ComponentService>(targets);
+        // clone the endpoint references themselves and set the reference pointer back to 
+        // this new refrence
+        clone.endpointReferences = new ArrayList<EndpointReference>();
+
+        for (EndpointReference epr : endpointReferences) {
+            EndpointReference eprClone = (EndpointReference)epr.clone();
+            eprClone.setReference((ComponentReference)clone);
+            clone.endpointReferences.add(eprClone);
+        }
+        return clone;
+    }
+
+    public List<Binding> getBindings() {
+        return bindings;
+    }
+
+    public <B> B getBinding(Class<B> bindingClass) {
+        for (Binding binding : bindings) {
+            if (bindingClass.isInstance(binding)) {
+                return bindingClass.cast(binding);
+            }
+        }
+        return null;
+    }
+
+    public <B> B getCallbackBinding(Class<B> bindingClass) {
+        if (callback != null) {
+            for (Binding binding : callback.getBindings()) {
+                if (bindingClass.isInstance(binding)) {
+                    return bindingClass.cast(binding);
+                }
+            }
+        }
+        return null;
+    }
+
+    public boolean isWiredByImpl() {
+        return wiredByImpl;
+    }
+
+    public void setWiredByImpl(boolean wiredByImpl) {
+        this.wiredByImpl = wiredByImpl;
+    }
+
+    public List<ComponentService> getTargets() {
+        return targets;
+    }
+
+    public Callback getCallback() {
+        return callback;
+    }
+
+    public void setCallback(Callback callback) {
+        this.callback = callback;
+    }
+
+    /**
+     * By default return the interface contract for the reference
+     */
+    public InterfaceContract getInterfaceContract(Binding binding) {
+        return getInterfaceContract();
+    }
+
+    public List<EndpointReference> getEndpointReferences() {
+        return endpointReferences;
+    }
+
+    public String toString() {
+        return getName();
+    }
+
+    public boolean isOverridingBindings() {
+        return overridingBindings;
+    }
+
+    public void setOverridingBindings(boolean overridingBindings) {
+        this.overridingBindings = overridingBindings;
+    }
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/SCABindingFactoryImpl.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/SCABindingFactoryImpl.java
new file mode 100644
index 0000000000..84e5825b50
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/SCABindingFactoryImpl.java
@@ -0,0 +1,40 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.tuscany.sca.assembly.impl;
+
+import org.apache.tuscany.sca.assembly.SCABinding;
+import org.apache.tuscany.sca.assembly.SCABindingFactory;
+
+/**
+ * A factory for the SCA binding model.
+ *
+ * @version $Rev$ $Date$
+ */
+public class SCABindingFactoryImpl implements SCABindingFactory {
+
+    public SCABindingFactoryImpl() {
+
+    }
+
+    public SCABinding createSCABinding() {
+        return new SCABindingImpl();
+    }
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/SCABindingImpl.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/SCABindingImpl.java
new file mode 100644
index 0000000000..b42f3f929f
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/SCABindingImpl.java
@@ -0,0 +1,148 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.sca.assembly.impl;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import javax.xml.namespace.QName;
+
+import org.apache.tuscany.sca.assembly.Extensible;
+import org.apache.tuscany.sca.assembly.Extension;
+import org.apache.tuscany.sca.assembly.OperationSelector;
+import org.apache.tuscany.sca.assembly.SCABinding;
+import org.apache.tuscany.sca.assembly.WireFormat;
+import org.apache.tuscany.sca.policy.ExtensionType;
+import org.apache.tuscany.sca.policy.Intent;
+import org.apache.tuscany.sca.policy.PolicySet;
+import org.apache.tuscany.sca.policy.PolicySubject;
+
+/**
+ * The assembly mode object for an SCA binding.
+ *
+ * @version $Rev$ $Date$
+ */
+public class SCABindingImpl implements SCABinding, Extensible, PolicySubject {
+    private String name;
+    private String uri;
+    private List<Object> extensions = new ArrayList<Object>();
+    private List<Extension> attributeExtensions = new ArrayList<Extension>();
+    private List<Intent> requiredIntents = new ArrayList<Intent>();
+    private List<PolicySet> policySets = new ArrayList<PolicySet>();
+    private ExtensionType extensionType;
+
+    /**
+     * Constructs a new SCA binding.
+     */
+    protected SCABindingImpl() {
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    /**
+     * Getters for the binding URI. The computed URI for the
+     * service that the reference is targeting or which the service represents
+     * depending on whether the biding is associated with a reference or
+     * service
+     *
+     * @return the binding URI
+     */
+    public String getURI() {
+        return uri;
+    }
+
+    public void setURI(String uri) {
+        this.uri = uri;
+    }
+
+    public List<Object> getExtensions() {
+        return extensions;
+    }
+
+    public List<Extension> getAttributeExtensions() {
+        return attributeExtensions;
+    }
+
+    public boolean isUnresolved() {
+        return false;
+    }
+
+    public void setUnresolved(boolean unresolved) {
+    }
+
+    public List<PolicySet> getPolicySets() {
+        return policySets;
+    }
+
+    public List<Intent> getRequiredIntents() {
+        return requiredIntents;
+    }
+
+    public ExtensionType getExtensionType() {
+        return extensionType;
+    }
+
+    public void setExtensionType(ExtensionType intentAttachPointType) {
+        this.extensionType = intentAttachPointType;
+    }
+
+    public void setPolicySets(List<PolicySet> policySets) {
+        this.policySets = policySets;
+    }
+
+    public void setRequiredIntents(List<Intent> intents) {
+        this.requiredIntents = intents;
+    }
+
+    @Override
+    public Object clone() throws CloneNotSupportedException {
+        return super.clone();
+    }
+
+    public QName getType() {
+        return TYPE;
+    }
+    
+    public WireFormat getRequestWireFormat() {
+        return null;
+    }
+    
+    public void setRequestWireFormat(WireFormat wireFormat) {  
+    }
+    
+    public WireFormat getResponseWireFormat() {
+        return null;
+    }
+    
+    public void setResponseWireFormat(WireFormat wireFormat) {
+    }
+    
+    public OperationSelector getOperationSelector() {
+        return null;
+    }
+    
+    public void setOperationSelector(OperationSelector operationSelector) {
+    }    
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ServiceImpl.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ServiceImpl.java
new file mode 100644
index 0000000000..f8eb0fa6ec
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ServiceImpl.java
@@ -0,0 +1,115 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.assembly.impl;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.tuscany.sca.assembly.Binding;
+import org.apache.tuscany.sca.assembly.Callback;
+import org.apache.tuscany.sca.assembly.Endpoint;
+import org.apache.tuscany.sca.assembly.Service;
+import org.apache.tuscany.sca.interfacedef.InterfaceContract;
+
+/**
+ * Represents a reference.
+ * 
+ * @version $Rev$ $Date$
+ */
+public class ServiceImpl extends AbstractServiceImpl implements Service, Cloneable {
+    private List<Binding> bindings = new ArrayList<Binding>();
+    private boolean overridingBindings;
+    private Callback callback;
+    private List<Endpoint> endpoints = new ArrayList<Endpoint>();
+    private boolean isJAXWSService = false;
+
+    /**
+     * Constructs a new service.
+     */
+    protected ServiceImpl() {
+    }
+
+    @Override
+    public Object clone() throws CloneNotSupportedException {
+        ServiceImpl clone = (ServiceImpl)super.clone();
+        clone.bindings = new ArrayList<Binding>();
+        clone.bindings.addAll(getBindings());
+        return clone;
+    }
+
+    public List<Binding> getBindings() {
+        return bindings;
+    }
+
+    public <B> B getBinding(Class<B> bindingClass) {
+        for (Binding binding : bindings) {
+            if (bindingClass.isInstance(binding)) {
+                return bindingClass.cast(binding);
+            }
+        }
+        return null;
+    }
+
+    public <B> B getCallbackBinding(Class<B> bindingClass) {
+        if (callback != null) {
+            for (Binding binding : callback.getBindings()) {
+                if (bindingClass.isInstance(binding)) {
+                    return bindingClass.cast(binding);
+                }
+            }
+        }
+        return null;
+    }
+
+    public Callback getCallback() {
+        return callback;
+    }
+
+    public void setCallback(Callback callback) {
+        this.callback = callback;
+    }
+
+    /**
+     * By default return the interface contract for the service
+     */
+    public InterfaceContract getInterfaceContract(Binding binding) {
+        return getInterfaceContract();
+    }
+
+    public List<Endpoint> getEndpoints() {
+        return endpoints;
+    }
+
+    public boolean isOverridingBindings() {
+        return overridingBindings;
+    }
+
+    public void setOverridingBindings(boolean overridingBindings) {
+        this.overridingBindings = overridingBindings;
+    }
+    
+    public boolean isJAXWSService() {
+        return isJAXWSService;
+    }
+    
+    public void setJAXWSService(boolean isJAXWSService) {
+        this.isJAXWSService = isJAXWSService;
+    }
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/WireImpl.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/WireImpl.java
new file mode 100644
index 0000000000..a4990f6a98
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/WireImpl.java
@@ -0,0 +1,105 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.assembly.impl;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.tuscany.sca.assembly.ComponentReference;
+import org.apache.tuscany.sca.assembly.ComponentService;
+import org.apache.tuscany.sca.assembly.Wire;
+import org.apache.tuscany.sca.policy.ExtensionType;
+import org.apache.tuscany.sca.policy.Intent;
+import org.apache.tuscany.sca.policy.PolicySet;
+
+/**
+ * Represents a wire
+ * 
+ * @version $Rev$ $Date$
+ */
+public class WireImpl extends ExtensibleImpl implements Wire, Cloneable {
+    private ComponentReference source;
+    private ComponentService target;
+    private boolean replace;
+    private List<Intent> requiredIntents = new ArrayList<Intent>();
+    private List<PolicySet> policySets = new ArrayList<PolicySet>();
+    private List<PolicySet> applicablePolicySets = new ArrayList<PolicySet>();
+
+    public List<PolicySet> getApplicablePolicySets() {
+        return applicablePolicySets;
+    }
+
+    /**
+     * Constructs a new wire.
+     */
+    protected WireImpl() {
+    }
+
+    @Override
+    public Object clone() throws CloneNotSupportedException {
+        return super.clone();
+    }
+
+    public ComponentReference getSource() {
+        return source;
+    }
+
+    public ComponentService getTarget() {
+        return target;
+    }
+
+    public void setSource(ComponentReference source) {
+        this.source = source;
+    }
+
+    public void setTarget(ComponentService target) {
+        this.target = target;
+    }
+
+    public List<Intent> getRequiredIntents() {
+        return requiredIntents;
+    }
+
+    public List<PolicySet> getPolicySets() {
+        return policySets;
+    }
+
+    public ExtensionType getExtensionType() {
+        return null;
+    }
+
+    public void setExtensionType(ExtensionType type) {
+    }
+
+    public void setPolicySets(List<PolicySet> policySets) {
+        this.policySets = policySets;
+    }
+
+    public void setRequiredIntents(List<Intent> intents) {
+        this.requiredIntents = intents;
+    }
+
+    public boolean isReplace() {
+        return replace;
+    }
+
+    public void setReplace(boolean replace) {
+        this.replace = replace;
+    }
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/definitions/DefaultDefinitionsFactory.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/definitions/DefaultDefinitionsFactory.java
new file mode 100644
index 0000000000..156fd0af75
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/definitions/DefaultDefinitionsFactory.java
@@ -0,0 +1,32 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.definitions;
+
+import org.apache.tuscany.sca.definitions.impl.DefinitionsImpl;
+
+/**
+ * Default Implementation of DefinitionsFactory
+ */
+public class DefaultDefinitionsFactory implements DefinitionsFactory {
+
+    public Definitions createDefinitions() {
+        return new DefinitionsImpl();
+    }
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/definitions/Definitions.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/definitions/Definitions.java
new file mode 100644
index 0000000000..9ae5e6f26f
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/definitions/Definitions.java
@@ -0,0 +1,92 @@
+ /*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.definitions;
+
+import java.util.List;
+
+import org.apache.tuscany.sca.assembly.Binding;
+import org.apache.tuscany.sca.policy.BindingType;
+import org.apache.tuscany.sca.policy.ImplementationType;
+import org.apache.tuscany.sca.policy.Intent;
+import org.apache.tuscany.sca.policy.PolicySet;
+
+import org.apache.tuscany.sca.policy.ExternalAttachment;
+
+
+/**
+ * Represents SCA Definitions.
+ *
+ * @version $Rev$ $Date$
+ */
+public interface Definitions {
+    /**
+     * Returns the target namespace for this SCA Definition
+     * @return the target namespace
+     */
+    String getTargetNamespace();
+    
+    /**
+     * Sets the target names for this SCA Definition.
+     * 
+     * @param ns the target namespace for this SCA Definition
+     */
+    void setTargetNamespace(String ns);
+
+    /**
+     * Returns a list of domain wide Policy Intents
+     * 
+     * @return a list of domain wide Policy Intents 
+     */
+    List<Intent> getIntents();
+    
+    /**
+     * Returns a list of domain wide PolicySets
+     * 
+     * @return a list of domain wide PolicySets 
+     */
+    List<PolicySet> getPolicySets();
+    
+    /**
+     * Returns a list of domain wide Binding Types
+     * 
+     * @return a list of domain wide Binding Types 
+     */
+    List<BindingType> getBindingTypes();
+    
+    
+    /**
+     * Returns a list of domain wide Implementation Types
+     * 
+     * @return a list of domain wide Implementation Types 
+     */
+    List<ImplementationType> getImplementationTypes();
+
+    /**
+     * Returns a list of domain wide binding definition objects
+     * 
+     * @return a list of domain wide binding definition objects 
+     */
+    List<Binding> getBindings();
+    
+    /**
+     * Returns a list of external attachments
+     * @return
+     */
+    List<ExternalAttachment> getExternalAttachments();
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/definitions/DefinitionsBuilder.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/definitions/DefinitionsBuilder.java
new file mode 100644
index 0000000000..5c68c6cbff
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/definitions/DefinitionsBuilder.java
@@ -0,0 +1,34 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.definitions;
+
+
+/**
+ * Interface to abstract building of SCA Definitions for a Domain
+ *
+ * @version $Rev$ $Date$
+ */
+public interface DefinitionsBuilder {
+    /**
+     * Builds the SCA definitions 
+     * 
+     * @param scaDefns
+     */
+    void build(Definitions scaDefns) throws DefinitionsBuilderException;
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/definitions/DefinitionsBuilderException.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/definitions/DefinitionsBuilderException.java
new file mode 100644
index 0000000000..f45be80888
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/definitions/DefinitionsBuilderException.java
@@ -0,0 +1,43 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.definitions;
+
+/**
+ * Builder Exception
+ *
+ * @version $Rev$ $Date$
+ */
+public class DefinitionsBuilderException extends Exception {
+    private static final long serialVersionUID = 2513219325230252783L;
+
+    public DefinitionsBuilderException() {
+    }
+
+    public DefinitionsBuilderException(String message) {
+        super(message);
+    }
+
+    public DefinitionsBuilderException(Throwable cause) {
+        super(cause);
+    }
+
+    public DefinitionsBuilderException(String message, Throwable cause) {
+        super(message, cause);
+    }
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/definitions/DefinitionsFactory.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/definitions/DefinitionsFactory.java
new file mode 100644
index 0000000000..616616ae7a
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/definitions/DefinitionsFactory.java
@@ -0,0 +1,31 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.definitions;
+
+/**
+ * Factory interface to create SCA definitions model
+ *
+ */
+public interface DefinitionsFactory {
+    /**
+     * Create an instance of SCA definitions
+     * @return a new instance of SCA definitions
+     */
+    Definitions createDefinitions();
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/definitions/impl/DefinitionsBuilderImpl.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/definitions/impl/DefinitionsBuilderImpl.java
new file mode 100644
index 0000000000..d87d45b27a
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/definitions/impl/DefinitionsBuilderImpl.java
@@ -0,0 +1,307 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.definitions.impl;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import javax.xml.namespace.QName;
+
+import org.apache.tuscany.sca.definitions.Definitions;
+import org.apache.tuscany.sca.definitions.DefinitionsBuilder;
+import org.apache.tuscany.sca.definitions.DefinitionsBuilderException;
+import org.apache.tuscany.sca.policy.BindingType;
+import org.apache.tuscany.sca.policy.ExtensionType;
+import org.apache.tuscany.sca.policy.ImplementationType;
+import org.apache.tuscany.sca.policy.Intent;
+import org.apache.tuscany.sca.policy.IntentMap;
+import org.apache.tuscany.sca.policy.PolicySet;
+import org.apache.tuscany.sca.policy.Qualifier;
+
+/**
+ * Provides a concrete implementation for a SCADefinitionsBuilder
+ *
+ * @version $Rev$ $Date$
+ */
+public class DefinitionsBuilderImpl implements DefinitionsBuilder {
+
+    public void build(Definitions scaDefns) throws DefinitionsBuilderException {
+        Map<QName, Intent> definedIntents = new HashMap<QName, Intent>();
+        for (Intent intent : scaDefns.getIntents()) {
+            definedIntents.put(intent.getName(), intent);
+        }
+
+        Map<QName, PolicySet> definedPolicySets = new HashMap<QName, PolicySet>();
+        for (PolicySet policySet : scaDefns.getPolicySets()) {
+            definedPolicySets.put(policySet.getName(), policySet);
+        }
+
+        Map<QName, BindingType> definedBindingTypes = new HashMap<QName, BindingType>();
+        for (BindingType bindingType : scaDefns.getBindingTypes()) {
+            definedBindingTypes.put(bindingType.getType(), bindingType);
+        }
+
+        Map<QName, ImplementationType> definedImplTypes = new HashMap<QName, ImplementationType>();
+        for (ImplementationType implType : scaDefns.getImplementationTypes()) {
+            definedImplTypes.put(implType.getType(), implType);
+        }
+
+        //filling up the maps removes all duplicate entries... so fill this unique lists
+        //into the scaDefns.
+        scaDefns.getIntents().clear();
+        scaDefns.getPolicySets().clear();
+        scaDefns.getBindingTypes().clear();
+        scaDefns.getImplementationTypes().clear();
+
+        scaDefns.getIntents().addAll(definedIntents.values());
+        scaDefns.getPolicySets().addAll(definedPolicySets.values());
+        scaDefns.getBindingTypes().addAll(definedBindingTypes.values());
+        scaDefns.getImplementationTypes().addAll(definedImplTypes.values());
+
+        buildPolicyIntents(scaDefns, definedIntents);
+        buildPolicySets(scaDefns, definedPolicySets, definedIntents);
+        buildBindingTypes(scaDefns, definedBindingTypes, definedIntents);
+        buildImplementationTypes(scaDefns, definedImplTypes, definedIntents);
+    }
+
+    private void buildBindingTypes(Definitions scaDefns,
+                                   Map<QName, BindingType> definedBindingTypes,
+                                   Map<QName, Intent> definedIntents) throws DefinitionsBuilderException {
+        for (BindingType bindingType : scaDefns.getBindingTypes()) {
+            buildAlwaysProvidedIntents(bindingType, definedIntents);
+            buildMayProvideIntents(bindingType, definedIntents);
+        }
+
+    }
+
+    private void buildImplementationTypes(Definitions scaDefns,
+                                          Map<QName, ImplementationType> definedImplTypes,
+                                          Map<QName, Intent> definedIntents) throws DefinitionsBuilderException {
+        for (ImplementationType implType : scaDefns.getImplementationTypes()) {
+            buildAlwaysProvidedIntents(implType, definedIntents);
+            buildMayProvideIntents(implType, definedIntents);
+        }
+    }
+
+    private void buildPolicyIntents(Definitions scaDefns, Map<QName, Intent> definedIntents)
+        throws DefinitionsBuilderException {
+        for (Intent policyIntent : scaDefns.getIntents()) {
+            if (!policyIntent.getRequiredIntents().isEmpty()) {
+                buildProfileIntent(policyIntent, definedIntents);
+            }
+
+            if (!policyIntent.getQualifiedIntents().isEmpty()) {
+                buildQualifiedIntent(policyIntent, definedIntents);
+            }
+        }
+    }
+
+    private void buildPolicySets(Definitions scaDefns,
+                                 Map<QName, PolicySet> definedPolicySets,
+                                 Map<QName, Intent> definedIntents) throws DefinitionsBuilderException {
+
+        for (PolicySet policySet : scaDefns.getPolicySets()) {
+            buildProvidedIntents(policySet, definedIntents);
+            buildIntentsInMappedPolicies(policySet, definedIntents);
+            buildReferredPolicySets(policySet, definedPolicySets);
+        }
+
+        for (PolicySet policySet : scaDefns.getPolicySets()) {
+            for (PolicySet referredPolicySet : policySet.getReferencedPolicySets()) {
+                includeReferredPolicySets(policySet, referredPolicySet);
+            }
+        }
+    }
+
+    private void buildProfileIntent(Intent policyIntent, Map<QName, Intent> definedIntents)
+        throws DefinitionsBuilderException {
+        //FIXME: Need to check for cyclic references first i.e an A requiring B and then B requiring A... 
+        if (policyIntent != null) {
+            //resolve all required intents
+            List<Intent> requiredIntents = new ArrayList<Intent>();
+            for (Intent requiredIntent : policyIntent.getRequiredIntents()) {
+                if (requiredIntent.isUnresolved()) {
+                    Intent resolvedRequiredIntent = definedIntents.get(requiredIntent.getName());
+                    if (resolvedRequiredIntent != null) {
+                        requiredIntents.add(resolvedRequiredIntent);
+                    } else {
+                        throw new DefinitionsBuilderException("Required Intent - " + requiredIntent
+                            + " not found for ProfileIntent "
+                            + policyIntent);
+
+                    }
+                } else {
+                    requiredIntents.add(requiredIntent);
+                }
+            }
+            policyIntent.getRequiredIntents().clear();
+            policyIntent.getRequiredIntents().addAll(requiredIntents);
+        }
+    }
+
+    private void buildQualifiedIntent(Intent policyIntent, Map<QName, Intent> definedIntents)
+        throws DefinitionsBuilderException {
+        /*
+        if (policyIntent != null) {
+            //resolve the qualifiable intent
+            Intent qualifiableIntent = policyIntent.getQualifiableIntent();
+            if (qualifiableIntent.isUnresolved()) {
+                Intent resolvedQualifiableIntent = definedIntents.get(qualifiableIntent.getName());
+
+                if (resolvedQualifiableIntent != null) {
+                    policyIntent.setQualifiableIntent(resolvedQualifiableIntent);
+                } else {
+                    throw new DefinitionsBuilderException("Qualifiable Intent - " + qualifiableIntent
+                        + " not found for QualifiedIntent "
+                        + policyIntent);
+                }
+
+            }
+        }
+        */
+    }
+
+    private void buildAlwaysProvidedIntents(ExtensionType extensionType, Map<QName, Intent> definedIntents)
+        throws DefinitionsBuilderException {
+        if (extensionType != null) {
+            // resolve all provided intents
+            List<Intent> alwaysProvided = new ArrayList<Intent>();
+            for (Intent providedIntent : extensionType.getAlwaysProvidedIntents()) {
+                if (providedIntent.isUnresolved()) {
+                    Intent resolvedProvidedIntent = definedIntents.get(providedIntent.getName());
+                    if (resolvedProvidedIntent != null) {
+                        alwaysProvided.add(resolvedProvidedIntent);
+                    } else {
+                        throw new DefinitionsBuilderException("Always Provided Intent - " + providedIntent
+                            + " not found for ExtensionType "
+                            + extensionType);
+
+                    }
+                } else {
+                    alwaysProvided.add(providedIntent);
+                }
+            }
+            extensionType.getAlwaysProvidedIntents().clear();
+            extensionType.getAlwaysProvidedIntents().addAll(alwaysProvided);
+        }
+    }
+
+    private void buildMayProvideIntents(ExtensionType extensionType, Map<QName, Intent> definedIntents)
+        throws DefinitionsBuilderException {
+        if (extensionType != null) {
+            // resolve all provided intents
+            List<Intent> mayProvide = new ArrayList<Intent>();
+            for (Intent providedIntent : extensionType.getMayProvidedIntents()) {
+                if (providedIntent.isUnresolved()) {
+                    Intent resolvedProvidedIntent = definedIntents.get(providedIntent.getName());
+                    if (resolvedProvidedIntent != null) {
+                        mayProvide.add(resolvedProvidedIntent);
+                    } else {
+                        throw new DefinitionsBuilderException("May Provide Intent - " + providedIntent
+                            + " not found for ExtensionType "
+                            + extensionType);
+
+                    }
+                } else {
+                    mayProvide.add(providedIntent);
+                }
+            }
+            extensionType.getMayProvidedIntents().clear();
+            extensionType.getMayProvidedIntents().addAll(mayProvide);
+        }
+    }
+
+    private void buildProvidedIntents(PolicySet policySet, Map<QName, Intent> definedIntents)
+        throws DefinitionsBuilderException {
+        if (policySet != null) {
+            //resolve all provided intents
+            List<Intent> providedIntents = new ArrayList<Intent>();
+            for (Intent providedIntent : policySet.getProvidedIntents()) {
+                if (providedIntent.isUnresolved()) {
+                    Intent resolvedProvidedIntent = definedIntents.get(providedIntent.getName());
+                    if (resolvedProvidedIntent != null) {
+                        providedIntents.add(resolvedProvidedIntent);
+                    } else {
+                        throw new DefinitionsBuilderException("Provided Intent - " + providedIntent
+                            + " not found for PolicySet "
+                            + policySet);
+
+                    }
+                } else {
+                    providedIntents.add(providedIntent);
+                }
+            }
+            policySet.getProvidedIntents().clear();
+            policySet.getProvidedIntents().addAll(providedIntents);
+        }
+    }
+
+    private void buildIntentsInMappedPolicies(PolicySet policySet, Map<QName, Intent> definedIntents)
+        throws DefinitionsBuilderException {
+        for (IntentMap intentMap : policySet.getIntentMaps()) {
+            for (Qualifier qualifier : intentMap.getQualifiers()) {
+                Intent mappedIntent = qualifier.getIntent();
+                if (mappedIntent.isUnresolved()) {
+                    Intent resolvedMappedIntent = definedIntents.get(mappedIntent.getName());
+
+                    if (resolvedMappedIntent != null) {
+                        qualifier.setIntent(resolvedMappedIntent);
+                    } else {
+                        throw new DefinitionsBuilderException("Mapped Intent - " + mappedIntent
+                            + " not found for PolicySet "
+                            + policySet);
+
+                    }
+                }
+            }
+        }
+    }
+
+    private void buildReferredPolicySets(PolicySet policySet, Map<QName, PolicySet> definedPolicySets)
+        throws DefinitionsBuilderException {
+
+        List<PolicySet> referredPolicySets = new ArrayList<PolicySet>();
+        for (PolicySet referredPolicySet : policySet.getReferencedPolicySets()) {
+            if (referredPolicySet.isUnresolved()) {
+                PolicySet resolvedReferredPolicySet = definedPolicySets.get(referredPolicySet.getName());
+                if (resolvedReferredPolicySet != null) {
+                    referredPolicySets.add(resolvedReferredPolicySet);
+                } else {
+                    throw new DefinitionsBuilderException("Referred PolicySet - " + referredPolicySet
+                        + "not found for PolicySet - "
+                        + policySet);
+                }
+            } else {
+                referredPolicySets.add(referredPolicySet);
+            }
+        }
+        policySet.getReferencedPolicySets().clear();
+        policySet.getReferencedPolicySets().addAll(referredPolicySets);
+    }
+
+    private void includeReferredPolicySets(PolicySet policySet, PolicySet referredPolicySet) {
+        for (PolicySet furtherReferredPolicySet : referredPolicySet.getReferencedPolicySets()) {
+            includeReferredPolicySets(referredPolicySet, furtherReferredPolicySet);
+        }
+        policySet.getPolicies().addAll(referredPolicySet.getPolicies());
+        policySet.getIntentMaps().addAll(referredPolicySet.getIntentMaps());
+    }
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/definitions/impl/DefinitionsImpl.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/definitions/impl/DefinitionsImpl.java
new file mode 100644
index 0000000000..e58261cda2
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/definitions/impl/DefinitionsImpl.java
@@ -0,0 +1,79 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.definitions.impl;
+
+import java.util.List;
+import java.util.concurrent.CopyOnWriteArrayList;
+
+import org.apache.tuscany.sca.assembly.Binding;
+import org.apache.tuscany.sca.definitions.Definitions;
+import org.apache.tuscany.sca.policy.BindingType;
+import org.apache.tuscany.sca.policy.ExternalAttachment;
+import org.apache.tuscany.sca.policy.ImplementationType;
+import org.apache.tuscany.sca.policy.Intent;
+import org.apache.tuscany.sca.policy.PolicySet;
+
+/**
+ * Provides a concrete implementation for SCADefinitions
+ *
+ * @version $Rev$ $Date$
+ */
+public class DefinitionsImpl implements Definitions {
+    private String targetNamespace = null;
+    private List<Intent> intents = new CopyOnWriteArrayList<Intent>();
+    private List<PolicySet> policySets = new CopyOnWriteArrayList<PolicySet>();
+    private List<BindingType> bindingTypes = new CopyOnWriteArrayList<BindingType>();
+    private List<ImplementationType> implementationTypes = new CopyOnWriteArrayList<ImplementationType>();
+    private List<Binding> bindings = new CopyOnWriteArrayList<Binding>();
+	private List<ExternalAttachment> externalAttachments = new CopyOnWriteArrayList<ExternalAttachment>();
+
+   
+    public List<BindingType> getBindingTypes() {
+        return bindingTypes;
+    }
+
+    public List<ImplementationType> getImplementationTypes() {
+        return implementationTypes;
+    }
+
+    public List<Intent> getIntents() {
+        return intents;
+    }
+
+    public List<PolicySet> getPolicySets() {
+        return policySets;
+    }
+
+    public String getTargetNamespace() {
+        return targetNamespace;
+    }
+
+    public void setTargetNamespace(String ns) {
+       this.targetNamespace = ns;
+    }
+
+    public List<Binding> getBindings() {
+        return bindings;
+    }
+
+	public List<ExternalAttachment> getExternalAttachments() {
+		return externalAttachments ;
+	}
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/definitions/util/DefinitionsUtil.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/definitions/util/DefinitionsUtil.java
new file mode 100644
index 0000000000..452c3bf883
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/definitions/util/DefinitionsUtil.java
@@ -0,0 +1,110 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.definitions.util;
+
+import static org.apache.tuscany.sca.assembly.builder.Messages.DEFINITIONS_VALIDATION;
+
+import java.util.HashSet;
+
+import org.apache.tuscany.sca.definitions.Definitions;
+import org.apache.tuscany.sca.monitor.Monitor;
+import org.apache.tuscany.sca.policy.BindingType;
+import org.apache.tuscany.sca.policy.ImplementationType;
+import org.apache.tuscany.sca.policy.Intent;
+import org.apache.tuscany.sca.policy.PolicySet;
+
+/**
+ * Some utility functions to deal with SCADefinitions
+ *
+ * @version $Rev$ $Date$
+ */
+public class DefinitionsUtil {
+    
+    /**
+     * Add the source set of definitions into the target set of definitions checking that 
+     * definitions artifacts are unique in the process
+     * 
+     * @param source the input definitions collection
+     * @param target the definition collection into which source will aggregated
+     */
+    public static void aggregate(Definitions source, Definitions target, Monitor monitor) {
+        
+        HashSet<Intent> intents = new HashSet<Intent>(target.getIntents());
+        for(Intent intent : source.getIntents()){           
+            if (intents.contains(intent)){
+                Monitor.error(monitor, 
+                              target, 
+                              DEFINITIONS_VALIDATION, 
+                              "DuplicateIntent", 
+                              intent.getName().toString());
+            } else {          
+                target.getIntents().add(intent);
+                intents.add(intent);
+            }
+        }
+        
+        HashSet<PolicySet> policySets = new HashSet<PolicySet>(target.getPolicySets());
+        for(PolicySet policySet : source.getPolicySets()){           
+            if (policySets.contains(policySet)){
+                Monitor.error(monitor, 
+                              target, 
+                              DEFINITIONS_VALIDATION, 
+                              "DuplicatePolicySet", 
+                              policySet.getName().toString());
+            } else {          
+                target.getPolicySets().add(policySet);
+                policySets.add(policySet);
+            }
+        }        
+
+        HashSet<BindingType> bindingTypes = new HashSet<BindingType>(target.getBindingTypes());
+        for(BindingType bindingType : source.getBindingTypes()){           
+            if (bindingTypes.contains(bindingType)){
+                Monitor.error(monitor, 
+                              target, 
+                              DEFINITIONS_VALIDATION, 
+                              "DuplicateBindingType", 
+                              bindingType.getType().toString());
+            } else {          
+                target.getBindingTypes().add(bindingType);
+                bindingTypes.add(bindingType);
+            }
+        }   
+
+        HashSet<ImplementationType> implementationTypes = new HashSet<ImplementationType>(target.getImplementationTypes());
+        for(ImplementationType implementationType : source.getImplementationTypes()){           
+            if (implementationTypes.contains(implementationType)){
+                Monitor.error(monitor, 
+                              target, 
+                              DEFINITIONS_VALIDATION, 
+                              "DuplicateImplementationType", 
+                              implementationType.getType().toString());
+            } else {          
+                target.getImplementationTypes().add(implementationType);
+                implementationTypes.add(implementationType);
+            }
+        }        
+      
+        target.getBindings().addAll(source.getBindings());
+        
+        target.getExternalAttachments().addAll(source.getExternalAttachments());
+    }
+    
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/Compatibility.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/Compatibility.java
new file mode 100644
index 0000000000..e05a05476a
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/Compatibility.java
@@ -0,0 +1,29 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.interfacedef;
+
+/**
+ * Types of compatibility
+ */
+public enum Compatibility {
+    SUPERSET,       // The source is a superset of the target    
+    SUBSET,         // The source is a subset of the target
+    MUTUAL,          // The source is the same set as the target
+    INCOMPATIBLE     // The source is not compatible with the target   
+}
\ No newline at end of file
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/DataType.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/DataType.java
new file mode 100644
index 0000000000..386275b41b
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/DataType.java
@@ -0,0 +1,120 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.interfacedef;
+
+import java.lang.reflect.Type;
+
+/**
+ * Representation of the type of data associated with an operation. Data is
+ * represented in two forms: the physical form used by the runtime and a logical
+ * form used by the assembly. The physical form is a Java Type because the
+ * runtime is written in Java. This may be the same form used by the application
+ * but it may not; for example, an application that is performing stream
+ * processing may want a physical form such as an
+ * {@link java.io.InputStream InputStream} to semantically operate on application
+ * data such as a purchase order. The logical description is that used by the
+ * assembly model and is an identifier into some well-known type space; examples
+ * may be a Java type represented by its Class or an XML type represented by its
+ * QName. Every data type may also contain metadata describing the expected
+ * data; for example, it could specify a preferred data binding technology or
+ * the size of a typical instance.
+ * 
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.asclient
+ */
+public interface DataType<L> extends Cloneable {
+    /**
+     * Set the java type for the data
+     * @param cls
+     */
+    void setPhysical(Class<?> cls);
+
+    /**
+     * Returns the physical type used by the runtime.
+     * 
+     * @return the physical type used by the runtime
+     */
+    Class<?> getPhysical();
+
+    /**
+     * Get the java generic type
+     * @return The java generic type
+     */
+    Type getGenericType();
+
+    /**
+     * Set the java generic type
+     * @param genericType
+     */
+    void setGenericType(Type genericType);
+
+    /**
+     * Returns the logical identifier used by the assembly. The type of this
+     * value identifies the logical type system in use. Known values are:
+     * <ul>
+     * <li>a Class identifies a Java type by name and
+     * ClassLoader; this includes Java Classes as they are specializations of
+     * Type</li>
+     * <li>a XMLType identifies an XML type by local name and
+     * namespace</li>
+     * </ul>
+     * 
+     * @return the logical type name
+     */
+    L getLogical();
+
+    /**
+     * Get the databinding for the given data type
+     * @return the databinding
+     */
+    String getDataBinding();
+
+    /**
+     * Set the databinding for the given data type
+     * @param dataBinding the dataBinding to set
+     */
+    void setDataBinding(String dataBinding);
+
+    /**
+     * Clone a data type
+     * @return The cloned data type
+     * @throws CloneNotSupportedException
+     */
+    Object clone() throws CloneNotSupportedException;
+
+    /**
+     * Set the logical type of the data type
+     * @param logical the logical to set
+     */
+    void setLogical(L logical);
+
+    /**
+     * Get the databinding-specific metadata
+     * @param type The java type of the metadata
+     * @return the databinding-specific metadata
+     */
+    <T> T getMetaData(Class<T> type);
+    /**
+     * Set the databinding-specific metadata
+     * @param type The java type of the metadata
+     * @param metaData the databinding-specific metadata, such as SDO's commonj.sdo.Type or 
+     * JAXB's javax.xml.bind.JAXBContext
+     */
+    <T> void setMetaData(Class<T> type, T metaData);
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/FaultExceptionMapper.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/FaultExceptionMapper.java
new file mode 100644
index 0000000000..4aa5f2780a
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/FaultExceptionMapper.java
@@ -0,0 +1,63 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.interfacedef;
+
+/**
+ * This interface represents the mapping between WSDL faults and Java exceptions
+ * 
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.inheritfrom
+ */
+@SuppressWarnings("unchecked")
+public interface FaultExceptionMapper {
+    /**
+     * Introspect an exception class to find out the fault data type following the WSDL2Java
+     * mapping rules. The result will be populated into the logical type of the exception data
+     * type
+     * 
+     * @param exceptionDataType The data type representing a java exception class
+     * @param operation TODO
+     * @param generatingFaultBean If JAXWS Section 3.7 Fault Bean will be generated
+     * @return true if the introspection can recognize the exception data type 
+     */
+    boolean introspectFaultDataType(DataType<DataType> exceptionDataType, Operation operation, boolean generatingFaultBean);
+    
+    /**
+     * Create a java exception to wrap the fault data
+     * 
+     * @param exceptionType The DataType for the exception
+     * @param message message for the exception
+     * @param faultInfo The fault data
+     * @param cause of the exception
+     * @param operation TODO
+     * @return An instance of java exception to represent the fault
+     */
+    Throwable wrapFaultInfo(DataType<DataType> exceptionType, String message, Object faultInfo, Throwable cause, Operation operation);
+
+    /**
+     * Retrieve the fault info from a java exception
+     * 
+     * @param exception The java exception that represents the fault data
+     * @param faultBeanClass
+     * @param operation TODO
+     * @return The fault data
+     */
+    Object getFaultInfo(Throwable exception, Class<?> faultBeanClass, Operation operation);
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/IncompatibleInterfaceContractException.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/IncompatibleInterfaceContractException.java
new file mode 100644
index 0000000000..179dc1755e
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/IncompatibleInterfaceContractException.java
@@ -0,0 +1,69 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.interfacedef;
+
+/**
+ * Denotes incompatible service contracts for a wire
+ * 
+ * @version $Rev$ $Date$
+ */
+public class IncompatibleInterfaceContractException extends Exception {
+    private static final long serialVersionUID = 5127478601823295587L;
+    private final InterfaceContract source;
+    private final InterfaceContract target;
+    private final Operation sourceOperation;
+    private final Operation targetOperation;
+
+    public IncompatibleInterfaceContractException(String message, InterfaceContract source, InterfaceContract target) {
+        super(message);
+        this.source = source;
+        this.target = target;
+        this.sourceOperation = null;
+        this.targetOperation = null;
+    }
+
+    public IncompatibleInterfaceContractException(String message,
+                                                  InterfaceContract source,
+                                                  InterfaceContract target,
+                                                  Operation sourceOperation,
+                                                  Operation targetOperation) {
+        super(message);
+        this.source = source;
+        this.target = target;
+        this.sourceOperation = sourceOperation;
+        this.targetOperation = targetOperation;
+    }
+
+    public InterfaceContract getTarget() {
+        return target;
+    }
+
+    public InterfaceContract getSource() {
+        return source;
+    }
+
+    public Operation getSourceOperation() {
+        return sourceOperation;
+    }
+
+    public Operation getTargetOperation() {
+        return targetOperation;
+    }
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/Interface.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/Interface.java
new file mode 100644
index 0000000000..e3103b768a
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/Interface.java
@@ -0,0 +1,116 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.sca.interfacedef;
+
+import java.util.List;
+import java.util.Map;
+
+import org.apache.tuscany.sca.policy.PolicySubject;
+
+/**
+ * Represents a service interface. This interface will typically be extended to
+ * support concrete interface type systems, such as Java interfaces, WSDL 1.1
+ * portTypes and WSDL 2.0 interfaces.
+ *
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.inheritfrom
+ */
+public interface Interface extends Cloneable, PolicySubject {
+
+    /**
+     * Returns true if the interface is a remotable interface..
+     *
+     * @return true if the interface is a remotable interface
+     */
+    boolean isRemotable();
+
+    /**
+     * Sets whether the interface is a remotable or local interface.
+     *
+     * @param remotable indicates whether the interface is remotable or local
+     */
+    void setRemotable(boolean remotable);
+    
+    /**
+     * Returns true if the interface remotable property is set..
+     * 
+     * This is used to verify if a @remotable attribute is used in the 
+     * <interface.java> SCDL element. If true, use isRemotable to verify the
+     * current value
+     * 
+     * @return
+     */
+    boolean isRemotableSet();
+
+    /**
+     * Returns the operations defined on this interface.
+     *
+     * @return the operations defined on this interface
+     */
+    List<Operation> getOperations();
+
+    /**
+     * Set the databinding for the interface
+     * @param dataBinding
+     * @deprecated Please use resetDataBinding
+     */
+    @Deprecated
+    void setDefaultDataBinding(String dataBinding);
+
+    /**
+     * Reset the databinding for the interface
+     * @param dataBinding
+     */
+    void resetDataBinding(String dataBinding);
+
+    /**
+     * Set the interface input types by copying those from the
+     * interface provided
+     * 
+     * @param newInterface
+     */
+    public void resetInterfaceInputTypes(Interface newInterface);
+    
+    /**
+     * Set the interface output types by copying those from the
+     * interface provided
+     * 
+     * @param newInterface
+     */
+    public void resetInterfaceOutputTypes(Interface newInterface);
+
+    /**
+     * Returns true if the Interface is dynamic.
+     *
+     * @return true if the Interface is dynamic.
+     */
+    boolean isDynamic();
+
+    /**
+     * Get a map of attributes associated with the interface
+     * @return A map of attributes
+     */
+    Map<Object, Object> getAttributes();
+
+    /**
+     * Implementations must support cloning.
+     */
+    Object clone() throws CloneNotSupportedException;
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/InterfaceContract.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/InterfaceContract.java
new file mode 100644
index 0000000000..3eda9f37e5
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/InterfaceContract.java
@@ -0,0 +1,100 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.interfacedef;
+
+
+/**
+ * Interface contracts define one or more business functions. These business
+ * functions are provided by services and are used by references.
+ * 
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.inheritfrom
+ */
+public interface InterfaceContract extends Cloneable {
+
+    /**
+     * Returns the interface definition representing the interface for
+     * invocations from the requestor to the provider.
+     * 
+     * @return the interface definition representing the interface for
+     *         invocations from the requestor to the provider
+     */
+    Interface getInterface();
+
+    /**
+     * Sets the interface definition representing the interface for invocations
+     * from the requestor to the provider.
+     * 
+     * @param callInterface the interface definition representing the interface
+     *            for invocations from the requestor to the provider
+     */
+    void setInterface(Interface callInterface);
+
+    /**
+     * Returns the interface definition representing the interface for
+     * invocations from the provider to the requestor.
+     * 
+     * @return the interface definition representing the interface for
+     *         invocations from the provider to the requestor.
+     */
+    Interface getCallbackInterface();
+
+    /**
+     * Sets the interface definition representing the interface for invocations
+     * from the provider to the requestor.
+     * 
+     * @param callbackInterface the interface definition representing the
+     *            interface for invocations from the provider to the requestor.
+     */
+    void setCallbackInterface(Interface callbackInterface);
+
+    // FIXME: We need a better way to do this
+    /**
+     * Convert an interface contract to a unidirectional interface contract
+     *  
+     * @param isCallback true for a callback interface contract, false for
+     *        a forward interface contract
+     * @return A unidirectional interface contract, cloned if necessary 
+     */
+    InterfaceContract makeUnidirectional(boolean isCallback);
+
+    /**
+     * Implementations must support cloning.
+     */
+    Object clone() throws CloneNotSupportedException;
+    
+    /**
+     * For matching purposes the Java interface contract is 
+     * turned into a WSDL contract in the cases where it needs to be matched
+     * against another WSDL contract
+     * 
+     * @return WSDL interface contract
+     */
+    InterfaceContract getNormalizedWSDLContract();
+    
+    /**
+     * For matching purposes the Java interface contract is 
+     * turned into a WSDL contract in the cases where it needs to be matched
+     * against another WSDL contract
+     * 
+     * @param wsdlInterfaceContract
+     */
+    void setNormailizedWSDLContract(InterfaceContract wsdlInterfaceContract);    
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/InterfaceContractMapper.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/InterfaceContractMapper.java
new file mode 100644
index 0000000000..94bce6d6b4
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/InterfaceContractMapper.java
@@ -0,0 +1,232 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.interfacedef;
+
+import org.apache.tuscany.sca.interfacedef.util.Audit;
+
+/**
+ * The InterfaceContractMapper is responsible to match interfaces
+ * 
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.asclient
+ */
+public interface InterfaceContractMapper {
+    /**
+     * @param source The source interface contract
+     * @param target The target interface contract
+     * @param compatibility The compatibility style 
+     * @param ignoreCallback
+     * @param silent
+     * @return
+     * @throws IncompatibleInterfaceContractException
+     */
+    boolean checkCompatibility(InterfaceContract source,
+                               InterfaceContract target,
+                               Compatibility compatibility,
+                               boolean ignoreCallback,
+                               boolean silent) throws IncompatibleInterfaceContractException;
+    
+    /**
+     * @param source The source interface contract
+     * @param target The target interface contract
+     * @param compatibility The compatibility style 
+     * @param ignoreCallback
+     * @param silent
+     * @return
+     * @throws IncompatibleInterfaceContractException
+     * this interface is intended to incrementally replace the variant without the audit trail
+     * the presence of both interfaces implies a state of partial development
+     */
+    boolean checkCompatibility(InterfaceContract source,
+                               InterfaceContract target,
+                               Compatibility compatibility,
+                               boolean ignoreCallback,
+                               boolean silent,
+                               Audit audit) throws IncompatibleInterfaceContractException;
+
+    /**
+     * Test if the source data type is compatible with the target data type. The
+     * compatibility is defined as follows.
+     * <ul>
+     * <li>source's logical type is either the same or subtype of the target's
+     * logical type
+     * </ul>
+     * For example, if the source type is a SDO Customer and the target type is
+     * a JAXB Customer and both Customer are generated from the same XSD type.
+     * 
+     * @param source The source data type
+     * @param target The target data type
+     * @param passByValue A flag to indicate how the compatibility is checked
+     * <ul>
+     * <li>true: Check the two types as compatible "by-value" (can be copied)
+     * <li>false: Check the two types as compatible "by-reference" (can be assigned)
+     * </ul> 
+     * @return true if the source data type is the same or subtype of the target data type 
+     */
+    boolean isCompatible(DataType<?> source, DataType<?> target, boolean passByValue);
+
+    /**
+     * Check if source operation is compatible with the target operation. A source operation is 
+     * compatible with the target operation means the following:
+     * 
+     * <ol>
+     * <li>compatibility for the two operations is defined as compatibility 
+     * of the signature, i.e., the operation name, the input types, and the output types are the same
+     * 
+     * <li>the order of the input and output types of the source operation is the same as the order of 
+     * the input and output types for the corresponding target operation
+     * <li>the set of Faults and Exceptions expected by the source operation is the same as or is 
+     * a SUPERSET of the set of Faults and Exceptions specified by the corresponding target operation
+     * </ol>
+     * 
+     * Simply speaking, any request from the source operation can be processed by the target operation and
+     * the normal response or fault/exception from the target operation can be handled by the source operation.
+     * 
+     * Please note this compatibility check is NOT symmetric. But the following should be guaranteed:
+     * <ul>
+     * <li>(source, target, SUB) == (target, source, SUPER)
+     * <li>(source, target, MUTUAL) == (source, target, SUB) && (target, source, SUB) == (source, target, SUPER) && (source, target, SUPER)
+     * 
+     * @param source The source operation
+     * @param target The target operation
+     * @param compatibilityType The type of compatibility
+     * @return true if the source operation is compatible with the target
+     *         operation
+     */
+    boolean isCompatible(Operation source, Operation target, Compatibility compatibilityType);
+    
+    boolean isCompatibleByReference(Operation source, Operation target, Compatibility compatibilityType);
+    boolean isCompatibleByValue(Operation source, Operation target, Compatibility compatibilityType);
+
+    /**
+     * An interface A is a Compatible Subset of a second interface B if and only if all of points 1 through 6 
+     * in the following list apply:
+     * <ol>
+     * <li>interfaces A and B are either both remotable or else both local
+     * <li>the set of operations in interface A is the same as or is a subset of the set of operations in 
+     * interface B
+     * <li>compatibility for individual operations of the interfaces A and B is defined as compatibility 
+     * of the signature, i.e., the operation name, the input types, and the output types are the same
+     * <li>the order of the input and output types for each operation in interface A is the same as the 
+     * order of the input and output types for the corresponding operation in interface B
+     * <li>the set of Faults and Exceptions expected by each operation in interface A is the same as or is 
+     * a superset of the set of Faults and Exceptions specified by the corresponding operation in interface B
+     * <li>for checking the compatibility of 2 remotable interfaces which are in different interface 
+     * languages, both are mapped to WSDL 1.1 (if not already WSDL 1.1) and compatibility checking is done 
+     * between the WSDL 1.1 mapped interfaces.<br>
+     * For checking the compatibility of 2 local interfaces which are in different interface languages, the 
+     * method of checking compatibility is defined by the specifications which define those interface types, 
+     * which must define mapping rules for the 2 interface types concerned.
+     * 
+     * </ol>
+     * 
+     * <b>The callback interfaces are not considered her.</b>
+     * 
+     * @param source The source interface 
+     * @param target The target interface 
+     * @return true if the source interface is a compatible subset of the target interface 
+     */
+    boolean isCompatibleSubset(Interface source, Interface target);
+
+    /**
+     * An interface A is a Compatible Subset of a second interface B if and only if all of points 1 through 7 
+     * in the following list apply:
+     * <ol>
+     * <li>interfaces A and B are either both remotable or else both local
+     * <li>the set of operations in interface A is the same as or is a subset of the set of operations in 
+     * interface B
+     * <li>compatibility for individual operations of the interfaces A and B is defined as compatibility 
+     * of the signature, i.e., the operation name, the input types, and the output types are the same
+     * <li>the order of the input and output types for each operation in interface A is the same as the 
+     * order of the input and output types for the corresponding operation in interface B
+     * <li>the set of Faults and Exceptions expected by each operation in interface A is the same as or is 
+     * a superset of the set of Faults and Exceptions specified by the corresponding operation in interface B
+     * <li>for checking the compatibility of 2 remotable interfaces which are in different interface 
+     * languages, both are mapped to WSDL 1.1 (if not already WSDL 1.1) and compatibility checking is done 
+     * between the WSDL 1.1 mapped interfaces.<br>
+     * For checking the compatibility of 2 local interfaces which are in different interface languages, the 
+     * method of checking compatibility is defined by the specifications which define those interface types, 
+     * which must define mapping rules for the 2 interface types concerned.
+     * <li>if either interface A or interface B declares a callback interface then both interface
+     * A and interface B declare callback interfaces and the callback interface declared on interface B is a 
+     * compatible subset of the callback interface declared on interface A, according to points 1 through 6 
+     * above
+     * </ol>
+     * 
+     * @param source The source interface contract
+     * @param target The target interface contract
+     * @return true if the source interface contract is a compatible subset of the target interface contract
+     */
+    boolean isCompatibleSubset(InterfaceContract source, InterfaceContract target);
+    /*
+     * the variant of isCompatibleSubset with the audit parameter is intended to supersed the other
+     * -- the presence of both indicates a partial development state
+     */
+    boolean isCompatibleSubset(InterfaceContract source, InterfaceContract target, Audit audit);
+
+    /**
+     * Check that two interfaces are mutually compatible. The interfaces are mutually compatible if the two 
+     * interfaces have the same set of operations, with each operation having the same signature (name, input 
+     * types, output types and fault/exception types).
+     * 
+     * @param source an interface
+     * @param target a second interface
+     * @return true if the two interfaces are mutually compatible, otherwise return false
+     */
+    public boolean isMutuallyCompatible(Interface source, Interface target);
+
+    /**
+     * An interface A is Compatible with a second interface B if and only if all of points 1 through 7 in the
+     * following list apply:<p>
+     * <ol>
+     * <li>interfaces A and B are either both remotable or else both local
+     * <li>the set of operations in interface A is the same as the set of operations in interface B
+     * <li>compatibility for individual operations of the interfaces A and B is defined as compatibility 
+     * of the signature, i.e., the operation name, the input types, and the output types are the same
+     * <li>the order of the input and output types for each operation in interface A is the same as the 
+     * order of the input and output types for the corresponding operation in interface B
+     * <li>the set of Faults and Exceptions expected by each operation in interface A is the
+     * same as the set of Faults and Exceptions specified by the corresponding operation in interface B
+     * <li>for checking the compatibility of 2 remotable interfaces which are in different interface 
+     * languages, both are mapped to WSDL 1.1 (if not already WSDL 1.1) and compatibility checking is done 
+     * between the WSDL 1.1 mapped interfaces.
+     * <br>For checking the compatibility of 2 local interfaces which are in different interface languages, 
+     * the method of checking compatibility is defined by the specifications which define those interface types, 
+     * which must define mapping rules for the 2 interface types concerned.
+     * <li>if either interface A or interface B declares a callback interface then both interface
+     * A and interface B declare callback interfaces and the callback interface declared on interface A is 
+     * compatible with the callback interface declared on interface B, according to points 1 through 6 above
+     *  
+     * @param source - the source interface contract
+     * @param target - the target interface contract
+     * @return true if the source and target interface contracts are mutually compatible
+     */
+    boolean isMutuallyCompatible(InterfaceContract source, InterfaceContract target);
+
+    /**
+     * Map the source operation to a compatible operation in the target interface
+     * 
+     * @param target The target interface
+     * @param source The source operation
+     * @return A compatible operation if the target interface is compatible superset of the source interface
+     */
+    Operation map(Interface target, Operation source);
+    
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/InvalidAnnotationException.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/InvalidAnnotationException.java
new file mode 100644
index 0000000000..db1d5f7fd7
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/InvalidAnnotationException.java
@@ -0,0 +1,40 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.interfacedef;
+
+/**
+ * 
+ * @tuscany.spi.extension.asclient
+ *
+ */
+public class InvalidAnnotationException extends InvalidInterfaceException {
+
+    private static final long serialVersionUID = 4923028138353415223L;
+    private final Class<?> clazz;
+
+    public InvalidAnnotationException(String message, Class<?> clazz) {
+        super(message);
+        this.clazz = clazz;
+    }
+
+    public Class<?> getAnnotation() {
+        return clazz;
+    }
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/InvalidCallbackException.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/InvalidCallbackException.java
new file mode 100644
index 0000000000..392e81a8fa
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/InvalidCallbackException.java
@@ -0,0 +1,35 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.interfacedef;
+
+
+/**
+ * Denotes an illegal callback interface
+ *
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.asclient
+ */
+
+public class InvalidCallbackException extends InvalidInterfaceException {
+    private static final long serialVersionUID = 2727755895702116397L;
+
+    public InvalidCallbackException(String message) {
+        super(message);
+    }
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/InvalidInterfaceException.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/InvalidInterfaceException.java
new file mode 100644
index 0000000000..0cac606e1a
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/InvalidInterfaceException.java
@@ -0,0 +1,43 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.interfacedef;
+
+/**
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.inheritfrom
+ */
+public abstract class InvalidInterfaceException extends Exception {
+    private static final long serialVersionUID = -3850574026273544538L;
+
+    public InvalidInterfaceException() {
+        super();
+    }
+
+    public InvalidInterfaceException(String message) {
+        super(message);
+    }
+
+    public InvalidInterfaceException(String message, Throwable cause) {
+        super(message, cause);
+    }
+
+    public InvalidInterfaceException(Throwable cause) {
+        super(cause);
+    }
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/InvalidOperationException.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/InvalidOperationException.java
new file mode 100644
index 0000000000..2e82c201d9
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/InvalidOperationException.java
@@ -0,0 +1,43 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.sca.interfacedef;
+
+import java.lang.reflect.Method;
+
+/**
+ * Denotes an invalid conversational interface definition
+ * 
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.asclient
+ */
+public class InvalidOperationException extends InvalidInterfaceException {
+
+    private static final long serialVersionUID = -1797615361821517091L;
+    private final Method operation;
+
+    public InvalidOperationException(String message, Method operation) {
+        super(message);
+        this.operation = operation;
+    }
+
+    public Method getOperation() {
+        return operation;
+    }
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/Operation.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/Operation.java
new file mode 100644
index 0000000000..fd47ece34c
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/Operation.java
@@ -0,0 +1,216 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.sca.interfacedef;
+
+import java.util.List;
+import java.util.Map;
+
+import javax.xml.namespace.QName;
+
+import org.apache.tuscany.sca.interfacedef.util.WrapperInfo;
+import org.apache.tuscany.sca.interfacedef.util.XMLType;
+import org.apache.tuscany.sca.policy.PolicySubject;
+
+/**
+ * Represents an operation on a service interface.
+ *
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.inheritfrom
+ */
+public interface Operation extends Cloneable, PolicySubject {
+    /**
+     * Returns the name of the operation.
+     *
+     * @return the name of the operation
+     */
+    String getName();
+
+    /**
+     * Sets the name of the operation.
+     *
+     * @param name the name of the operation
+     */
+    void setName(String name);
+
+    /**
+     * Returns true if the model element is unresolved.
+     *
+     * @return true if the model element is unresolved.
+     */
+    boolean isUnresolved();
+
+    /**
+     * Sets whether the model element is unresolved.
+     *
+     * @param unresolved whether the model element is unresolved
+     */
+    void setUnresolved(boolean unresolved);
+
+    /**
+     * Get the data type that represents the input of this operation. The logic
+     * type is a list of data types and each element represents a parameter
+     *
+     * @return the inputType
+     */
+    DataType<List<DataType>> getInputType();
+
+    /**
+     * @param inputType
+     */
+    void setInputType(DataType<List<DataType>> inputType);
+
+    /**
+     * Get the data type for the output
+     *
+     * @return the outputType
+     */  
+    DataType<List<DataType>> getOutputType();
+    /**
+     * @param outputType
+     */
+    void setOutputType(DataType<List<DataType>> outputType);
+
+    /**
+     * Get a list of data types to represent the faults/exceptions
+     *
+     * @return the faultTypes
+     */
+    List<DataType> getFaultTypes();
+
+    /**
+     * @param faultTypes
+     */
+    void setFaultTypes(List<DataType> faultTypes);
+
+    /**
+     * Get the owning interface
+     * @return
+     */
+    Interface getInterface();
+
+    /**
+     * Set the owning interface
+     * @param interfaze
+     */
+    void setInterface(Interface interfaze);
+
+    /**
+     * Indicate if the operation is non-blocking
+     * @return
+     */
+    boolean isNonBlocking();
+    
+    /**
+     * Indicate if the operation is an async server operation
+     * @return - true if the operation is an async server operation
+     */
+    boolean isAsyncServer();
+
+    /**
+     * Set the operation to be non-blocking
+     */
+    void setNonBlocking(boolean nonBlocking);
+
+    /**
+     * @return the wrapperInfo
+     */
+    WrapperInfo getWrapper();
+
+    /**
+     * @param wrapperInfo the wrapperInfo to set
+     */
+    void setWrapper(WrapperInfo wrapperInfo);
+
+    /**
+     * @return the wrapperStyle
+     */
+    boolean isWrapperStyle();
+
+    /**
+     * @param wrapperStyle the wrapperStyle to set
+     */
+    void setWrapperStyle(boolean wrapperStyle);
+
+    /**
+     * @deprecated This should be the WrapperInfo.getDataBinding()
+     * Get the databinding for the operation
+     * @return
+     */
+    @Deprecated
+    String getDataBinding();
+
+    /**
+     * @deprecated This should be the WrapperInfo.setDataBinding()
+     * Set the databinding for the operation
+     * @param dataBinding
+     */
+    @Deprecated
+    void setDataBinding(String dataBinding);
+
+    /**
+     * Returns true if the operation is dynamic.
+     *
+     * @return true if the operation is dynamic otherwise false
+     */
+    boolean isDynamic();
+
+    /**
+     * Set if the operation is dynamic
+     * @param b
+     */
+    void setDynamic(boolean b);
+
+    /**
+     * Get the synthesized fault beans for this operation
+     *
+     * @return the fault beans
+     */
+    Map<QName, List<DataType<XMLType>>> getFaultBeans();
+
+    /**
+     * Set the synthesized fault beans for this operation
+     * @param faultBeans
+     */
+    void setFaultBeans(Map<QName, List<DataType<XMLType>>> faultBeans);
+
+    /**
+     * Get a map of attributes assoicated with the operation
+     * @return A map of attributes
+     */
+    Map<Object, Object> getAttributes();
+
+    /**
+     * Implementations must support cloning.
+     */
+    Object clone() throws CloneNotSupportedException;
+
+    /**
+     * Returns the ParameterModes
+     * @return
+     */
+    List<ParameterMode> getParameterModes();
+    
+    /**
+     * Returns true 
+     * @return
+     */
+    public boolean hasHolders();
+    
+    public void setHasHolders(boolean value);
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/OverloadedOperationException.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/OverloadedOperationException.java
new file mode 100644
index 0000000000..92ac0850e7
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/OverloadedOperationException.java
@@ -0,0 +1,46 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.interfacedef;
+
+import java.lang.reflect.Method;
+
+/**
+ * Exception thrown to indicate that a service contract specification contains
+ * an overloaded method.
+ * 
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.asclient
+ */
+public class OverloadedOperationException extends InvalidInterfaceException {
+    private static final long serialVersionUID = -4658711318608885638L;
+    private final Method operation;
+
+    public OverloadedOperationException(Method operation) {
+        super(operation == null ? 
+                null : "[JCA20001] Cannot overload operation " + operation.getName() 
+                         + " on " + operation.getDeclaringClass().getName()
+                         + " as it is a @Remotable interface");
+        this.operation = operation;
+    }
+
+    public Method getOperation() {
+        return operation;
+    }
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/ParameterMode.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/ParameterMode.java
new file mode 100644
index 0000000000..c4244a3480
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/ParameterMode.java
@@ -0,0 +1,28 @@
+/*

+ * Licensed to the Apache Software Foundation (ASF) under one

+ * or more contributor license agreements.  See the NOTICE file

+ * distributed with this work for additional information

+ * regarding copyright ownership.  The ASF licenses this file

+ * to you under the Apache License, Version 2.0 (the

+ * "License"); you may not use this file except in compliance

+ * with the License.  You may obtain a copy of the License at

+ *

+ *   http://www.apache.org/licenses/LICENSE-2.0

+ *

+ * Unless required by applicable law or agreed to in writing,

+ * software distributed under the License is distributed on an

+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

+ * KIND, either express or implied.  See the License for the

+ * specific language governing permissions and limitations

+ * under the License.

+ */

+

+package org.apache.tuscany.sca.interfacedef;

+

+/**

+ * Parameter mode

+ * @see http://java.sun.com/javase/6/docs/api/javax/jws/WebParam.Mode.html

+ */

+public enum ParameterMode {

+    IN, OUT, INOUT;

+}

diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/impl/DataTypeImpl.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/impl/DataTypeImpl.java
new file mode 100644
index 0000000000..572dd7e356
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/impl/DataTypeImpl.java
@@ -0,0 +1,227 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.interfacedef.impl;
+
+import java.lang.reflect.Type;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+import org.apache.tuscany.sca.interfacedef.DataType;
+
+/**
+ * Representation of the type of data associated with an operation. Data is
+ * represented in two forms: the physical form used by the runtime and a logical
+ * form used by the assembly. The physical form is a Java Type because the
+ * runtime is written in Java. This may be the same form used by the application
+ * but it may not; for example, an application that is performing stream
+ * processing may want a physical form such as an
+ * {@link java.io.InputStream InputStream} to semantically operate on application
+ * data such as a purchase order. The logical description is that used by the
+ * assembly model and is an identifier into some well-known type space; examples
+ * may be a Java type represented by its Class or an XML type represented by its
+ * QName. Every data type may also contain metadata describing the expected
+ * data; for example, it could specify a preferred data binding technology or
+ * the size of a typical instance.
+ * 
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.asclient
+ */
+public class DataTypeImpl<L> implements DataType<L> {
+    private String dataBinding;
+    private Class<?> physical;
+    private Type genericType;
+    private L logical;
+    private Map<Class<?>, Object> metaDataMap;
+
+    /**
+     * Construct a data type specifying the physical and logical types.
+     * 
+     * @param physical the physical class used by the runtime
+     * @param logical the logical type
+     * @see #getLogical()
+     */
+    public DataTypeImpl(Class<?> physical, L logical) {
+        this(null, physical, physical, logical);
+    }
+
+    /**
+     * @param dataBinding
+     * @param physical
+     * @param logical
+     */
+    public DataTypeImpl(String dataBinding, Class<?> physical, L logical) {
+        this(dataBinding, physical, physical, logical);
+    }
+
+    /**
+     * @param dataBinding
+     * @param physical
+     * @param genericType
+     * @param logical
+     */
+    public DataTypeImpl(String dataBinding, Class<?> physical, Type genericType, L logical) {
+        super();
+        this.dataBinding = dataBinding;
+        this.physical = physical;
+        this.genericType = genericType;
+        this.logical = logical;
+    }
+
+    /**
+     * Returns the physical type used by the runtime.
+     * 
+     * @return the physical type used by the runtime
+     */
+    public Class<?> getPhysical() {
+        return physical;
+    }
+
+    /**
+     * @param physical the physical to set
+     */
+    public void setPhysical(Class<?> physical) {
+        this.physical = physical;
+    }
+
+    /**
+     * Get the java generic type
+     * @return The java generic type
+     */
+    public Type getGenericType() {
+        return genericType;
+    }
+
+    /**
+     * Set the java generic type
+     * @param genericType
+     */
+    public void setGenericType(Type genericType) {
+        this.genericType = genericType;
+    }
+
+    /**
+     * Returns the logical identifier used by the assembly. The type of this
+     * value identifies the logical type system in use. Known values are:
+     * <ul>
+     * <li>a java.lang.reflect.Type identifies a Java type by name and
+     * ClassLoader; this includes Java Classes as they are specializations of
+     * Type</li>
+     * <li>a javax.xml.namespace.QName identifies an XML type by local name and
+     * namespace</li>
+     * </ul>
+     * 
+     * @return the logical type name
+     */
+    public L getLogical() {
+        return logical;
+    }
+
+    /**
+     * @param logical the logical to set
+     */
+    public void setLogical(L logical) {
+        this.logical = logical;
+    }
+
+    public String getDataBinding() {
+        return dataBinding;
+    }
+
+    /**
+     * @param dataBinding the dataBinding to set
+     */
+    public void setDataBinding(String dataBinding) {
+        this.dataBinding = dataBinding;
+    }
+
+        
+    @Override
+    public String toString() {    	
+    	StringBuilder b = new StringBuilder( 256 );
+    	b.append( "DataType[" );
+    	b.append( "dataBinding=" + ((dataBinding==null) ? "null" : dataBinding) );
+    	b.append( ", genericType=" + ((genericType==null) ? "null" : genericType) ); 
+    	b.append( ", physical=" + ((physical==null) ? "null" : physical) ); 
+    	b.append( ", logical=" + ((logical==null) ? "null" : logical) );
+    	b.append( ", metaData size=" + ((metaDataMap==null) ? "0" : metaDataMap.size()) );
+    	b.append( "]" );
+    	return b.toString();
+    }
+
+    @SuppressWarnings("unchecked")
+    @Override
+    public Object clone() throws CloneNotSupportedException {
+        DataTypeImpl copy = (DataTypeImpl)super.clone();
+        return copy;
+    }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((dataBinding == null) ? 0 : dataBinding.hashCode());
+        result = prime * result + ((genericType == null) ? 0 : genericType.hashCode());
+        result = prime * result + ((logical == null) ? 0 : logical.hashCode());
+        result = prime * result + ((physical == null) ? 0 : physical.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj)
+            return true;
+        if (obj == null)
+            return false;
+        if (getClass() != obj.getClass())
+            return false;
+        final DataTypeImpl other = (DataTypeImpl)obj;
+        if (dataBinding == null) {
+            if (other.dataBinding != null)
+                return false;
+        } else if (!dataBinding.equals(other.dataBinding))
+            return false;
+        if (genericType == null) {
+            if (other.genericType != null)
+                return false;
+        } else if (!genericType.equals(other.genericType))
+            return false;
+        if (logical == null) {
+            if (other.logical != null)
+                return false;
+        } else if (!logical.equals(other.logical))
+            return false;
+        if (physical == null) {
+            if (other.physical != null)
+                return false;
+        } else if (!physical.equals(other.physical))
+            return false;
+        return true;
+    }
+
+    public <T> T getMetaData(Class<T> type) {
+        return metaDataMap == null ? null : type.cast(metaDataMap.get(type));
+    }
+
+    public <T> void setMetaData(Class<T> type, T metaData) {
+        if (metaDataMap == null) {
+            metaDataMap = new ConcurrentHashMap<Class<?>, Object>();
+        }
+        metaDataMap.put(type, metaData);
+    }
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/impl/InterfaceContractImpl.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/impl/InterfaceContractImpl.java
new file mode 100644
index 0000000000..4fad64ac89
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/impl/InterfaceContractImpl.java
@@ -0,0 +1,142 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.interfacedef.impl;
+
+import org.apache.tuscany.sca.interfacedef.Interface;
+import org.apache.tuscany.sca.interfacedef.InterfaceContract;
+
+/**
+ * Represents an interface contract. InterfaceContractImpl
+ * 
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.inheritfrom
+ */
+public abstract class InterfaceContractImpl implements InterfaceContract {
+    private Interface callInterface;
+    private Interface callbackInterface;
+
+    public Interface getCallbackInterface() {
+        return callbackInterface;
+    }
+
+    public Interface getInterface() {
+        return callInterface;
+    }
+
+    public void setCallbackInterface(Interface callbackInterface) {
+        this.callbackInterface = callbackInterface;
+    }
+
+    public void setInterface(Interface callInterface) {
+        this.callInterface = callInterface;
+    }
+
+    public InterfaceContract makeUnidirectional(boolean isCallback) {
+        if (!isCallback && callbackInterface == null)
+            return this; // already a unidirectional forward interface contract
+
+        if (isCallback && callInterface == null)
+            return this; // already a unidirectional callback interface contract
+
+        // contract is bidirectional, so create a new unidirectional contract        
+        try {
+            InterfaceContract newContract = clone();
+            if (!isCallback) {
+                newContract.setCallbackInterface(null); // create unidirectional forward interface contract
+            } else {
+                newContract.setInterface(null); // create unidirectional callback interface contract
+            }
+            return newContract;
+        } catch (CloneNotSupportedException e) {
+            // will not happen
+            return null;
+        }
+    }
+
+    @Override
+    public InterfaceContractImpl clone() throws CloneNotSupportedException {
+        InterfaceContractImpl copy = (InterfaceContractImpl)super.clone();
+        if (this.callbackInterface != null) {
+            copy.callbackInterface = (Interface)this.callbackInterface.clone();
+        }
+        if (this.callInterface != null) {
+            copy.callInterface = (Interface)this.callInterface.clone();
+        }
+        return copy;
+    }
+
+    /**
+     * @see java.lang.Object#hashCode()
+     */
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((callInterface == null) ? 0 : callInterface.hashCode());
+        result = prime * result + ((callbackInterface == null) ? 0 : callbackInterface.hashCode());
+        return result;
+    }
+
+    /**
+     * @see java.lang.Object#equals(java.lang.Object)
+     */
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (getClass() != obj.getClass()) {
+            return false;
+        }
+        final InterfaceContractImpl other = (InterfaceContractImpl)obj;
+        if (callInterface == null) {
+            if (other.callInterface != null) {
+                return false;
+            }
+        } else if (!callInterface.equals(other.callInterface)) {
+            return false;
+        }
+        if (callbackInterface == null) {
+            if (other.callbackInterface != null) {
+                return false;
+            }
+        } else if (!callbackInterface.equals(other.callbackInterface)) {
+            return false;
+        }
+        return true;
+    }
+    
+    // By default there is no normailized contract
+    // as only Java needs it
+    public InterfaceContract getNormalizedWSDLContract() {
+        return null;
+    }
+    
+    // By default there is no normailized contract
+    // as only Java needs it
+    public void setNormailizedWSDLContract(
+            InterfaceContract wsdlInterfaceContract) {
+        // do nothing
+    }
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/impl/InterfaceContractMapperImpl.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/impl/InterfaceContractMapperImpl.java
new file mode 100644
index 0000000000..c28694c930
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/impl/InterfaceContractMapperImpl.java
@@ -0,0 +1,589 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.tuscany.sca.interfacedef.impl;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import javax.xml.namespace.QName;
+
+import org.apache.tuscany.sca.assembly.builder.BuilderExtensionPoint;
+import org.apache.tuscany.sca.assembly.builder.ContractBuilder;
+import org.apache.tuscany.sca.core.ExtensionPointRegistry;
+import org.apache.tuscany.sca.interfacedef.Compatibility;
+import org.apache.tuscany.sca.interfacedef.DataType;
+import org.apache.tuscany.sca.interfacedef.IncompatibleInterfaceContractException;
+import org.apache.tuscany.sca.interfacedef.Interface;
+import org.apache.tuscany.sca.interfacedef.InterfaceContract;
+import org.apache.tuscany.sca.interfacedef.InterfaceContractMapper;
+import org.apache.tuscany.sca.interfacedef.Operation;
+import org.apache.tuscany.sca.interfacedef.util.Audit;
+import org.apache.tuscany.sca.interfacedef.util.XMLType;
+import org.apache.tuscany.sca.policy.ExtensionType;
+
+/**
+ * @version $Rev$ $Date$
+ */
+public class InterfaceContractMapperImpl implements InterfaceContractMapper {
+    
+    protected ExtensionPointRegistry registry;
+    protected BuilderExtensionPoint builders;
+    protected ContractBuilder contractBuilder;
+    
+    public InterfaceContractMapperImpl(ExtensionPointRegistry registry){
+        this.registry = registry;
+        this.builders = registry.getExtensionPoint(BuilderExtensionPoint.class);
+    }
+    
+    public boolean isCompatible(DataType source, DataType target, boolean passByValue) {
+        return isCompatible(source, target, passByValue, null);   
+    }
+
+    public boolean isCompatible(DataType source, DataType target, boolean passByValue, Audit audit) {
+        if (source == target) {
+            return true;
+        }
+        if (!passByValue) {
+            if (source == null || target == null) {
+                if (audit != null){
+                    audit.append("One of either the source or target data types is null for");
+                }
+                return false;
+            }
+            // For local case
+            return target.getPhysical().isAssignableFrom(source.getPhysical());
+        } else {
+            // For remote interfaces where the target is represented with WSDL 
+            // the source will have been converted to WSDL so we rely on JAXB mappings
+            // being the same in both cases and just compare the type names directly. 
+            // TODO - is this right?
+            XMLType sourceLogicalType = null;
+            
+            // There is some nesting of data types (when GeneratedDataType is used) so
+            // dig a bit deeper to find the real data type
+            if (source.getLogical() instanceof DataType<?>){
+                sourceLogicalType = (XMLType)((DataType<?>)source.getLogical()).getLogical();
+            } else {
+                sourceLogicalType = (XMLType)source.getLogical();
+            }
+            
+            XMLType targetLogicalType = null; 
+            
+            if (target.getLogical() instanceof DataType<?>){
+                targetLogicalType = (XMLType)((DataType<?>)target.getLogical()).getLogical();
+            } else {
+                targetLogicalType = (XMLType)target.getLogical();
+            }
+            
+            // The logical type seems to be null in some cases, e.g. when the 
+            // argument or return type is something like a Map. 
+            // TODO - check when some type give rise to a null logical type
+            if (sourceLogicalType.getTypeName() == null ||
+                targetLogicalType.getTypeName() == null) {
+                return true;
+            }
+            
+            boolean match = sourceLogicalType.getTypeName().equals(targetLogicalType.getTypeName());
+            
+            if (!match){
+                
+                QName anyType = new QName("http://www.w3.org/2001/XMLSchema", "anyType");
+                if (sourceLogicalType.getTypeName().equals(anyType) || 
+                    targetLogicalType.getTypeName().equals(anyType)){
+                    // special case where a Java interface uses a generic type, e.g.
+                    // public OMElement getGreetings(OMElement om)
+                    // while the provided WSDL uses a specific type. So we assume
+                    // that xsd:anyType matched anything
+                    match = true;
+                } else {
+                    if (audit != null){
+                        audit.append("Operation argument types source = " + 
+                                     sourceLogicalType.getTypeName() + 
+                                     " target = " + 
+                                     targetLogicalType.getTypeName() +
+                                     " don't match for");
+                    }
+                }
+            }
+            
+            return match; 
+        }
+
+    }
+
+    /**
+     * Check that two interface contracts are equal. The contracts are equal if the two contracts have the 
+     * same set of operations, with each operation having the same signature, both for forward and callback
+     * interfaces
+     * @param source
+     * @param target
+     * @return
+     */
+    public boolean isMutuallyCompatible(InterfaceContract source, InterfaceContract target) {
+        ExtensionType ext = source.getInterface().getExtensionType();
+        InterfaceContract sourceContract = null;
+        
+        // Are the forward interfaces equal?
+        if (isMutuallyCompatible(source.getInterface(), target.getInterface())) {
+            // Is there a Callback interface?
+            if (source.getCallbackInterface() == null && target.getCallbackInterface() == null) {
+                return true;
+            } else {
+                if (isMutuallyCompatible(source.getCallbackInterface(), target.getCallbackInterface())) {
+                    return true;
+                } // end if
+            } // end if
+        } // end if
+        return false;
+    } // end method isEqual
+
+    /**
+     * Check that two interfaces are equal. The interfaces are equal if the two interfaces have the 
+     * same set of operations, with each operation having the same signature. 
+     * @param source
+     * @param target
+     * @return
+     */
+    public boolean isMutuallyCompatible(Interface source, Interface target) {
+        if (source == target) {
+            // Shortcut for performance
+            return true;
+        } // end if
+        if (source == null || target == null) {
+            return false;
+        } // end if
+
+        if (source.isDynamic() || target.isDynamic()) {
+            return true;
+        }
+
+        if (source.isRemotable() != target.isRemotable()) {
+            return false;
+        }
+        if (source.getOperations().size() != target.getOperations().size()) {
+            return false;
+        }
+
+        for (Operation operation : source.getOperations()) {
+            Operation targetOperation = getOperation(target.getOperations(), operation.getName());
+            if (targetOperation == null) {
+                return false;
+            }
+            if (!isCompatible(operation, targetOperation, Compatibility.SUBSET)) {
+                return false;
+            }
+        }
+        return true;
+    } // end method isEqual
+
+    public boolean isCompatible(Operation source, Operation target, Compatibility compatibilityType) {
+        return isCompatible(source, target, compatibilityType, true);
+    }
+
+    public boolean isCompatible(Operation source, Operation target, Compatibility compatibilityType, boolean byValue) {
+        return isCompatible(source, target, compatibilityType, true, null);
+    }
+    
+    public boolean isCompatible(Operation source, Operation target, Compatibility compatibilityType, boolean byValue, Audit audit) {
+        if (source == target) {
+            return true;
+        }
+
+        if (source.isDynamic() || target.isDynamic()) {
+            return true;
+        }
+
+        // Check name
+        if (!source.getName().equals(target.getName())) {
+            if (audit != null){
+                audit.append("operation names are not the same source = " +
+                             source.getName() + 
+                             " target = " +
+                             target.getName());
+                audit.appendSeperator();
+            }
+            return false;
+        }
+
+        if (source.getInterface().isRemotable() != target.getInterface().isRemotable()) {
+            if (audit != null){
+                audit.append("Interfaces have different remote settings source = " +
+                             source.getName() + 
+                             " target = " +
+                             target.getName());
+                audit.appendSeperator();
+            }            
+            return false;
+        }
+
+        if (source.isNonBlocking() != target.isNonBlocking()) {
+            if (audit != null){
+                audit.append("operations one-way not the same, source = " +
+                             source.isNonBlocking() + 
+                             " target = " +
+                             target.isNonBlocking());
+                audit.appendSeperator();
+            }            
+            return false;
+        }
+
+        boolean passByValue = (source.getInterface().isRemotable()) && byValue;
+
+        //        if (source.getInterface().isRemotable()) {
+        //            return true;
+        //        }
+
+        // FIXME: We need to deal with wrapped<-->unwrapped conversion
+
+        // Check output type
+        List<DataType> sourceOutputType = source.getOutputType().getLogical();
+        List<DataType> targetOutputType = target.getOutputType().getLogical();
+
+        boolean checkSourceWrapper = true;
+        List<DataType> sourceInputType = source.getInputType().getLogical();
+        if (source.isWrapperStyle() && source.getWrapper() != null) {
+            sourceInputType = source.getWrapper().getUnwrappedInputType().getLogical();
+            sourceOutputType = new ArrayList<DataType>();
+            sourceOutputType.add(source.getWrapper().getUnwrappedOutputType());
+            checkSourceWrapper = false;
+        }
+        boolean checkTargetWrapper = true;
+        List<DataType> targetInputType = target.getInputType().getLogical();
+        if (target.isWrapperStyle() && target.getWrapper() != null) {
+            targetInputType = target.getWrapper().getUnwrappedInputType().getLogical();
+            targetOutputType = new ArrayList<DataType>();
+            targetOutputType.add(target.getWrapper().getUnwrappedOutputType());
+            checkTargetWrapper = false;
+        }
+
+/* TODO - Why are we assuming compatibility if one side is wrapped and the other is not?
+        if (checkSourceWrapper != checkTargetWrapper) {
+            return true;
+        }
+*/
+
+        
+        if ( sourceOutputType.size() != targetOutputType.size()) {
+        	  if (audit != null){
+                  audit.append("different number of output types");
+                  audit.appendSeperator();
+              } 
+              return false;
+        }
+               
+        for ( int i=0; i < sourceOutputType.size(); i++) {
+        	 if (!isCompatible(targetOutputType.get(i), sourceOutputType.get(i), passByValue, audit)) {
+                 if (audit != null){
+                     audit.append(" output types");
+                     audit.appendSeperator();
+                 } 
+                 return false;
+             }
+        }
+       
+
+        if (sourceInputType.size() != targetInputType.size()) {
+            if (audit != null){
+                audit.append("different number of input types");
+                audit.appendSeperator();
+            } 
+            return false;
+        }
+
+        int size = sourceInputType.size();
+        for (int i = 0; i < size; i++) {
+            if (!isCompatible(sourceInputType.get(i), targetInputType.get(i), passByValue, audit)) {
+                if (audit != null){
+                    audit.append(" input types");
+                    audit.appendSeperator();
+                } 
+                return false;
+            }
+        }
+
+        // Check fault types
+        for (DataType targetFaultType : target.getFaultTypes()) {
+            // Source fault types must be the same or superset of target fault
+            // types
+            boolean found = true;
+            for (DataType sourceFaultType : source.getFaultTypes()) {
+                found = false;
+                if (isCompatible(targetFaultType, sourceFaultType, passByValue, audit)) {
+                    // Target fault type can be covered by the source fault type
+                    found = true;
+                    break;
+                }
+            }
+            if (!found) {
+                if (audit != null){
+                    audit.append("Fault types incompatible");
+                    audit.appendSeperator();
+                } 
+                return false;
+            }
+        }
+
+        return true;
+    }    
+    public boolean isCompatibleByReference(Operation source, Operation target, Compatibility compatibilityType) {
+        return isCompatible(source, target, compatibilityType, false);
+    }
+
+    public boolean isCompatibleByValue(Operation source, Operation target, Compatibility compatibilityType) {
+        return isCompatible(source, target, compatibilityType, true);
+    }
+
+    // FIXME: How to improve the performance for the lookup
+    private Operation getOperation(List<Operation> operations, String name) {
+        for (Operation op : operations) {
+            if (op.getName().equals(name)) {
+                return op;
+            }
+        }
+        return null;
+    }
+
+    /*
+     * this variant of the checkCompatibility method is intended to supersede the one without an audit argument
+     * Presence of both method variants indicates a state of partial development
+     */
+    public boolean checkCompatibility(InterfaceContract source,
+			                          InterfaceContract target, 
+			                          Compatibility compatibility,
+			                          boolean ignoreCallback, 
+			                          boolean silent, 
+			                          Audit audit)
+			throws IncompatibleInterfaceContractException {
+
+		if (source == target) {
+			// Shortcut for performance
+			return true;
+		}
+
+		if (source == null || target == null) {
+			return false;
+		}
+
+		if (source.getInterface() == target.getInterface()) {
+			return ignoreCallback
+					|| isCallbackCompatible(source, target, silent);
+		}
+
+		if (source.getInterface() == null || target.getInterface() == null) {
+			return false;
+		}
+
+		if (source.getInterface().isDynamic()
+				|| target.getInterface().isDynamic()) {
+			return ignoreCallback
+					|| isCallbackCompatible(source, target, silent);
+		}
+
+		if (source.getInterface().isRemotable() != target.getInterface()
+				.isRemotable()) {
+			if (!silent) {
+				audit.append("Remotable settings do not match: "+ source + "," + target); // TODO see if serialization is sufficient
+				audit.appendSeperator();
+				throw new IncompatibleInterfaceContractException(
+						"Remotable settings do not match", source, target);
+				
+			} else {
+				return false;
+			}
+		}
+
+		for (Operation operation : source.getInterface().getOperations()) {
+			Operation targetOperation = map(target.getInterface(), operation);
+			if (targetOperation == null) {
+				if (!silent) {
+	                audit.append("Operation " + operation.getName()+ " not found on target"); 
+	                audit.appendSeperator();
+					throw new IncompatibleInterfaceContractException(
+							"Operation " + operation.getName()
+									+ " not found on target", source, target);
+				} else {
+					return false;
+				}
+			}
+
+			if (!silent) {
+				if (audit == null)
+					audit = new Audit();
+				if (!isCompatible(operation, targetOperation,
+						Compatibility.SUBSET, true, audit)) {
+                    audit.append("Operations called " + operation.getName()+ " are not compatible"); 
+                    audit.appendSeperator();
+					throw new IncompatibleInterfaceContractException(
+							"Operations called " + operation.getName()
+									+ " are not compatible " + audit, source,
+							target);
+				}
+			} else {
+				if (!isCompatible(operation, targetOperation,
+						Compatibility.SUBSET)) {
+					return false;
+				}
+			}
+		}
+
+		return ignoreCallback || isCallbackCompatible(source, target, silent);
+	}
+
+    /*
+     * The old checkCompatibility operation without auditing. This just delegates to the new one for the time
+     * being while there are still calls that don't provide and audit object. In the medium term when the calls have
+     * been converted to sue the new opetion directly this should be removed. 
+     */
+    public boolean checkCompatibility(InterfaceContract source,
+                                      InterfaceContract target,
+                                      Compatibility compatibility,
+                                      boolean ignoreCallback,
+                                      boolean silent) 
+        throws IncompatibleInterfaceContractException {
+      
+        // create dummy audit object.
+        Audit audit = new Audit();
+        
+        return checkCompatibility(source, 
+                                  target, 
+                                  compatibility, 
+                                  ignoreCallback, 
+                                  silent,
+                                  audit);
+    }
+
+    
+    
+    protected boolean isCallbackCompatible(InterfaceContract source, InterfaceContract target, boolean silent)
+        throws IncompatibleInterfaceContractException {
+        if (source.getCallbackInterface() == null && target.getCallbackInterface() == null) {
+            return true;
+        }
+        if (source.getCallbackInterface() == null || target.getCallbackInterface() == null) {
+            if (!silent) {
+                throw new IncompatibleInterfaceContractException("Callback interface doesn't match as one of the callback interfaces is null", source, target);
+            } else {
+                return false;
+            }
+        }
+
+        for (Operation operation : source.getCallbackInterface().getOperations()) {
+            Operation targetOperation =
+                getOperation(target.getCallbackInterface().getOperations(), operation.getName());
+            if (targetOperation == null) {
+                if (!silent) {
+                    throw new IncompatibleInterfaceContractException("Callback operation not found on target", source,
+                                                                     target, null, targetOperation);
+                } else {
+                    return false;
+                }
+            }
+            if (!source.getCallbackInterface().isRemotable()) {
+                // FIXME: for remotable operation, only compare name for now
+                if (!operation.equals(targetOperation)) {
+                    if (!silent) {
+                        throw new IncompatibleInterfaceContractException("Target callback operation is not compatible",
+                                                                         source, target, operation, targetOperation);
+                    } else {
+                        return false;
+                    }
+                }
+            }
+        }
+        return true;
+    }
+
+    public boolean isCompatibleSubset(Interface source, Interface target) {
+        if (source == target) {
+            // Shortcut for performance
+            return true;
+        }
+        if (source == null || target == null) {
+            return false;
+        }
+
+        if (source.isDynamic() || target.isDynamic()) {
+            return true;
+        }
+
+        if (source.isRemotable() != target.isRemotable()) {
+            return false;
+        }
+
+        for (Operation operation : source.getOperations()) {
+            Operation targetOperation = getOperation(target.getOperations(), operation.getName());
+            if (targetOperation == null) {
+                return false;
+            }
+            if (!isCompatible(operation, targetOperation, Compatibility.SUBSET)) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    /*
+     * the variant of isCompatibleSubset with the audit parameter is intended to supersede the other
+     * -- the presence of both indicates a partial development state
+     */
+    public boolean isCompatibleSubset(InterfaceContract source, InterfaceContract target, Audit audit) {
+
+        try {
+            return checkCompatibility(source, target, Compatibility.SUBSET, false, false, audit);
+        } catch (IncompatibleInterfaceContractException e) {
+            return false;
+        }
+    }
+    
+    public boolean isCompatibleSubset(InterfaceContract source, InterfaceContract target) {
+
+        try {
+            return checkCompatibility(source, target, Compatibility.SUBSET, false, false);
+        } catch (IncompatibleInterfaceContractException e) {
+            return false;
+        }
+    }
+
+    /**
+     * @see org.apache.tuscany.sca.interfacedef.InterfaceContractMapper#map(org.apache.tuscany.sca.interfacedef.Interface,
+     *      org.apache.tuscany.sca.interfacedef.Operation)
+     */
+    public Operation map(Interface target, Operation source) {
+        // TODO: How to handle the case that source operation is dynamic?
+        if (target == null || target.isDynamic()) {
+            return source;
+        } else if (target.isRemotable()) {
+            for (Operation op : target.getOperations()) {
+                if (op.getName().equals(source.getName())) {
+                    return op;
+                }
+            }
+            return null;
+        } else {
+            for (Operation op : target.getOperations()) {
+                if (isCompatible(source, op, Compatibility.SUBSET)) {
+                    return op;
+                }
+            }
+            return null;
+        }
+    }
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/impl/InterfaceImpl.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/impl/InterfaceImpl.java
new file mode 100644
index 0000000000..eeab73e14e
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/impl/InterfaceImpl.java
@@ -0,0 +1,332 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.sca.interfacedef.impl;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+import org.apache.tuscany.sca.interfacedef.DataType;
+import org.apache.tuscany.sca.interfacedef.Interface;
+import org.apache.tuscany.sca.interfacedef.Operation;
+import org.apache.tuscany.sca.interfacedef.util.WrapperInfo;
+import org.apache.tuscany.sca.policy.ExtensionType;
+import org.apache.tuscany.sca.policy.Intent;
+import org.apache.tuscany.sca.policy.PolicySet;
+
+/**
+ * Represents a service interface.
+ *
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.inheritfrom
+ */
+public class InterfaceImpl implements Interface {
+
+    private Boolean remotable;
+    private boolean conversational;
+    private OperationList operations = new OperationList();
+    private boolean unresolved;
+
+    private ExtensionType type;
+    private List<PolicySet> policySets = new ArrayList<PolicySet>();
+    private List<Intent> requiredIntents = new ArrayList<Intent>();
+    private Map<Object, Object> attributes = new ConcurrentHashMap<Object, Object>();
+
+    public boolean isRemotable() {
+        boolean value = false;
+        if (remotable != null && remotable.booleanValue()) {
+            value = true;
+        }
+        return value;
+    }
+
+    public void setRemotable(boolean remotable) {
+        this.remotable = Boolean.valueOf(remotable);
+    }
+    
+    public boolean isRemotableSet() {
+        return remotable == null ? false : true;
+    }
+
+    public List<Operation> getOperations() {
+        return operations;
+    }
+
+    public boolean isUnresolved() {
+        return unresolved;
+    }
+
+    public void setUnresolved(boolean undefined) {
+        this.unresolved = undefined;
+    }
+
+    /**
+     * @return the conversational
+     */
+    public boolean isConversational() {
+        return conversational;
+    }
+
+    /**
+     * @param conversational the conversational to set
+     */
+    public void setConversational(boolean conversational) {
+        this.conversational = conversational;
+    }
+
+    private class OperationList extends ArrayList<Operation> {
+        private static final long serialVersionUID = -903469106307606099L;
+
+        @Override
+        public Operation set(int index, Operation element) {
+            element.setInterface(InterfaceImpl.this);
+            return super.set(index, element);
+        }
+
+        @Override
+        public void add(int index, Operation element) {
+            element.setInterface(InterfaceImpl.this);
+            super.add(index, element);
+        }
+
+        @Override
+        public boolean add(Operation o) {
+            o.setInterface(InterfaceImpl.this);
+            return super.add(o);
+        }
+
+        @Override
+        public boolean addAll(Collection<? extends Operation> c) {
+            for (Operation op : c) {
+                op.setInterface(InterfaceImpl.this);
+            }
+            return super.addAll(c);
+        }
+
+        @Override
+        public boolean addAll(int index, Collection<? extends Operation> c) {
+            for (Operation op : c) {
+                op.setInterface(InterfaceImpl.this);
+            }
+            return super.addAll(index, c);
+        }
+
+    }
+
+    @Deprecated
+    public void setDefaultDataBinding(String dataBinding) {
+        for (Operation op : getOperations()) {
+            if (op.getDataBinding() == null) {
+                op.setDataBinding(dataBinding);
+                DataType<List<DataType>> inputType = op.getInputType();
+                if (inputType != null) {
+                    for (DataType d : inputType.getLogical()) {
+                        if (d.getDataBinding() == null) {
+                            d.setDataBinding(dataBinding);
+                        }
+                    }
+                }
+                DataType outputType = op.getOutputType();
+                if (outputType != null && outputType.getDataBinding() == null) {
+                    outputType.setDataBinding(dataBinding);
+                }
+                List<DataType> faultTypes = op.getFaultTypes();
+                if (faultTypes != null) {
+                    for (DataType d : faultTypes) {
+                        if (d.getDataBinding() == null) {
+                            d.setDataBinding(dataBinding);
+                        }
+                        DataType ft = (DataType) d.getLogical();
+                        if (ft.getDataBinding() == null) {
+                            ft.setDataBinding(dataBinding);
+                        }
+
+                    }
+                }
+                if (op.isWrapperStyle()) {
+                    WrapperInfo wrapper = op.getWrapper();
+                    if (wrapper != null) {
+                        DataType<List<DataType>> unwrappedInputType = wrapper.getUnwrappedInputType();
+                        if (unwrappedInputType != null) {
+                            for (DataType d : unwrappedInputType.getLogical()) {
+                                if (d.getDataBinding() == null) {
+                                    d.setDataBinding(dataBinding);
+                                }
+                            }
+                        }
+                        DataType unwrappedOutputType = wrapper.getUnwrappedOutputType();
+                        if (unwrappedOutputType != null && unwrappedOutputType.getDataBinding() == null) {
+                            unwrappedOutputType.setDataBinding(dataBinding);
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    private void setDataBinding(DataType dataType, String dataBinding) {
+        if ("java:array".equals(dataType.getDataBinding())) {
+            setDataBinding((DataType)dataType.getLogical(), dataBinding);
+        } else {
+            dataType.setDataBinding(dataBinding);
+        }
+    }
+
+    public void resetDataBinding(String dataBinding) {
+        for (Operation op : getOperations()) {
+            op.setDataBinding(dataBinding);
+            DataType<List<DataType>> inputType = op.getInputType();
+            if (inputType != null) {
+                for (DataType d : inputType.getLogical()) {
+                    setDataBinding(d, dataBinding);
+                }
+            }
+            List<DataType> outputTypes = op.getOutputType().getLogical();
+            for ( DataType outputType : outputTypes ) {
+            	if (outputType != null) {
+            		setDataBinding(outputType, dataBinding);
+            	}
+            }
+           
+            List<DataType> faultTypes = op.getFaultTypes();
+            if (faultTypes != null) {
+                for (DataType d : faultTypes) {
+                    setDataBinding(d, dataBinding);
+                    setDataBinding((DataType) d.getLogical(), dataBinding);
+                }
+            }
+            if (op.isWrapperStyle()) {
+                WrapperInfo wrapper = op.getWrapper();
+                if (wrapper != null) {
+                    DataType<List<DataType>> unwrappedInputType = wrapper.getUnwrappedInputType();
+                    if (unwrappedInputType != null) {
+                        for (DataType d : unwrappedInputType.getLogical()) {
+                            setDataBinding(d, dataBinding);
+                        }
+                    }
+                    DataType unwrappedOutputType = wrapper.getUnwrappedOutputType();
+                    if (unwrappedOutputType != null) {
+                        setDataBinding(unwrappedOutputType, dataBinding);
+                    }
+                }
+            }
+        }
+    }
+
+    public void resetInterfaceInputTypes(Interface newInterface){
+        for (int i = 0; i < getOperations().size(); i++) {
+            // only remote interfaces only have a data type model defined
+            // and in this case operations cannot be overloaded so match
+            // operations by name
+            Operation oldOperation = getOperations().get(i);
+            Operation newOperation = null;
+
+            for (Operation tmpOperation : newInterface.getOperations()){
+                if (tmpOperation.getName().equals(oldOperation.getName())){
+                    newOperation = tmpOperation;
+                }
+            }
+
+            if (newOperation == null){
+                break;
+            }
+
+            // set input types
+            oldOperation.setInputType(newOperation.getInputType());
+
+            // set wrapper
+            if (newOperation.isWrapperStyle()) {
+                oldOperation.setWrapperStyle(true);
+                oldOperation.setWrapper(newOperation.getWrapper());
+            }
+        }
+    }
+
+    public void resetInterfaceOutputTypes(Interface newInterface){
+        for (int i = 0; i < getOperations().size(); i++) {
+            // only remote interfaces only have a data type model defined
+            // and in this case operations cannot be overloaded so match
+            // operations by name
+            Operation oldOperation = getOperations().get(i);
+            Operation newOperation = null;
+
+            for (Operation tmpOperation : newInterface.getOperations()){
+                if (tmpOperation.getName().equals(oldOperation.getName())){
+                    newOperation = tmpOperation;
+                }
+            }
+
+            if (newOperation == null){
+                break;
+            }
+
+            // set output types
+            oldOperation.setOutputType(newOperation.getOutputType());
+
+            // set fault types
+            oldOperation.setFaultTypes(newOperation.getFaultTypes());
+
+            // set wrapper
+            if (newOperation.isWrapperStyle()) {
+                oldOperation.setWrapperStyle(true);
+                oldOperation.setWrapper(newOperation.getWrapper());
+            }
+        }
+    }
+
+    public boolean isDynamic() {
+        return false;
+    }
+
+    public List<PolicySet> getPolicySets() {
+        return policySets;
+    }
+
+    public List<Intent> getRequiredIntents() {
+        return requiredIntents;
+    }
+
+    public ExtensionType getExtensionType() {
+        return type;
+    }
+
+    public void setExtensionType(ExtensionType type) {
+        this.type = type;
+    }
+
+    @Override
+    public Object clone() throws CloneNotSupportedException {
+        InterfaceImpl copy = (InterfaceImpl)super.clone();
+        copy.operations = new OperationList();
+        for (Operation operation : this.operations) {
+            Operation clonedOperation = (Operation)operation.clone();
+            copy.operations.add(clonedOperation);
+        }
+        copy.attributes = new ConcurrentHashMap<Object, Object>();
+        copy.attributes.putAll(attributes);
+        return copy;
+    }
+
+    public Map<Object, Object> getAttributes() {
+        return attributes;
+    }
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/impl/OperationImpl.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/impl/OperationImpl.java
new file mode 100644
index 0000000000..350135d974
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/impl/OperationImpl.java
@@ -0,0 +1,310 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.sca.interfacedef.impl;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+import javax.xml.namespace.QName;
+
+import org.apache.tuscany.sca.interfacedef.DataType;
+import org.apache.tuscany.sca.interfacedef.Interface;
+import org.apache.tuscany.sca.interfacedef.Operation;
+import org.apache.tuscany.sca.interfacedef.ParameterMode;
+import org.apache.tuscany.sca.interfacedef.util.WrapperInfo;
+import org.apache.tuscany.sca.interfacedef.util.XMLType;
+import org.apache.tuscany.sca.policy.ExtensionType;
+import org.apache.tuscany.sca.policy.Intent;
+import org.apache.tuscany.sca.policy.PolicySet;
+
+/**
+ * Represents an operation on a service interface.
+ *
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.inheritfrom
+ */
+public class OperationImpl implements Operation {
+
+    private String name;
+    private boolean unresolved;    
+    private DataType<List<DataType>> inputType;
+    private List<DataType> faultTypes;
+    private Interface interfaze;
+    private List<ParameterMode> parameterModes = new ArrayList<ParameterMode>();
+    private boolean nonBlocking;
+    private boolean wrapperStyle;
+    private WrapperInfo wrapper;
+    private boolean dynamic;
+
+    private Map<Object, Object> attributes = new ConcurrentHashMap<Object, Object>();
+
+    private Map<QName, List<DataType<XMLType>>> faultBeans;
+
+    private List<PolicySet> applicablePolicySets = new ArrayList<PolicySet>();
+    private List<PolicySet> policySets = new ArrayList<PolicySet>();
+    private List<Intent> requiredIntents = new ArrayList<Intent>();
+    private ExtensionType type;
+	private DataType<List<DataType>> outputType;
+	private boolean hasHolders;
+
+    /**
+     * @param name
+     */
+    public OperationImpl() {
+        inputType = new DataTypeImpl<List<DataType>>("idl:input", Object[].class, new ArrayList<DataType>());
+        faultTypes = new ArrayList<DataType>();
+        faultBeans = new HashMap<QName, List<DataType<XMLType>>>();
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public boolean isUnresolved() {
+        return unresolved;
+    }
+
+    public void setUnresolved(boolean undefined) {
+        this.unresolved = undefined;
+    }
+
+    /**
+     * @return the faultTypes
+     */
+    public List<DataType> getFaultTypes() {
+        return faultTypes;
+    }
+
+    /**
+     * @param faultTypes the faultTypes to set
+     */
+    public void setFaultTypes(List<DataType> faultTypes) {
+        this.faultTypes = faultTypes;
+    }
+
+    /**
+     * @return the inputType
+     */
+    public DataType<List<DataType>> getInputType() {
+        return inputType;
+    }
+
+    /**
+     * @param inputType the inputType to set
+     */
+    public void setInputType(DataType<List<DataType>> inputType) {
+        this.inputType = inputType;
+    }
+
+    /**
+     * @return the outputType
+     */
+    public DataType<List<DataType>> getOutputType() {
+    	return this.outputType;
+    }     
+
+    
+    /**
+     * @param outputType the outputType to set
+     */
+    public void setOutputType(DataType<List<DataType>> outputType) {
+       this.outputType = outputType;
+    }
+
+    /**
+     * @return the interface
+     */
+    public Interface getInterface() {
+        return interfaze;
+    }
+
+    /**
+     * @param interfaze the interface to set
+     */
+    public void setInterface(Interface interfaze) {
+        this.interfaze = interfaze;
+    }
+
+    /**
+     * @return the nonBlocking
+     */
+    public boolean isNonBlocking() {
+        return nonBlocking;
+    }
+
+    /**
+     * @param nonBlocking the nonBlocking to set
+     */
+    public void setNonBlocking(boolean nonBlocking) {
+        this.nonBlocking = nonBlocking;
+    }
+
+    /**
+     * @return the wrapperInfo
+     */
+    public WrapperInfo getWrapper() {
+        return wrapper;
+    }
+
+    /**
+     * @param wrapperInfo the wrapperInfo to set
+     */
+    public void setWrapper(WrapperInfo wrapperInfo) {
+        this.wrapper = wrapperInfo;
+    }
+
+    /**
+     * @return the wrapperStyle
+     */
+    public boolean isWrapperStyle() {
+        return wrapperStyle;
+    }
+
+    /**
+     * @param wrapperStyle the wrapperStyle to set
+     */
+    public void setWrapperStyle(boolean wrapperStyle) {
+        this.wrapperStyle = wrapperStyle;
+    }
+
+    public String getDataBinding() {
+        return wrapper != null ? wrapper.getDataBinding() : null;
+    }
+
+    public void setDataBinding(String dataBinding) {
+        if (wrapper != null) {
+            wrapper.setDataBinding(dataBinding);
+        }
+    }
+
+    public boolean isDynamic() {
+        return dynamic;
+    }
+
+    public void setDynamic(boolean b) {
+        this.dynamic = b;
+    }
+
+    public Map<QName, List<DataType<XMLType>>> getFaultBeans() {
+        return faultBeans;
+    }
+
+    public void setFaultBeans(Map<QName, List<DataType<XMLType>>> faultBeans) {
+        this.faultBeans = faultBeans;
+    }
+
+    @Override
+    public OperationImpl clone() throws CloneNotSupportedException {
+        OperationImpl copy = (OperationImpl) super.clone();
+
+        final List<DataType> clonedFaultTypes = new ArrayList<DataType>(this.faultTypes.size());
+        for (DataType t : this.faultTypes) {
+            clonedFaultTypes.add((DataType) t.clone());
+        }
+        copy.faultTypes = clonedFaultTypes;
+
+        List<DataType> clonedLogicalTypes = new ArrayList<DataType>();
+        for (DataType t : inputType.getLogical()) {
+            DataType type = (DataType) t.clone();
+            clonedLogicalTypes.add(type);
+        }
+        DataType<List<DataType>> clonedInputType =
+            new DataTypeImpl<List<DataType>>(inputType.getPhysical(), clonedLogicalTypes);
+        clonedInputType.setDataBinding(inputType.getDataBinding());
+        copy.inputType = clonedInputType;
+
+        if ( outputType != null ) {
+        	List<DataType> clonedLogicalOutputTypes = new ArrayList<DataType>();
+        	for ( DataType t : outputType.getLogical()) {
+        		if ( t == null ) {
+        			clonedLogicalOutputTypes.add(null);
+        		} else {
+        			DataType type = (DataType) t.clone();
+        			clonedLogicalOutputTypes.add(type);
+        		}
+        	}
+        	DataType<List<DataType>> clonedOutputType = 
+        		new DataTypeImpl<List<DataType>>(outputType.getPhysical(), clonedLogicalOutputTypes);
+       		 clonedOutputType.setDataBinding(outputType.getDataBinding());
+       		 copy.outputType = clonedOutputType;    
+        }
+
+        copy.attributes = new ConcurrentHashMap<Object, Object>();
+        copy.attributes.putAll(attributes);
+        
+        // [rfeng] We need to clone the wrapper as it holds the databinding information
+        if (wrapper != null) {
+            copy.wrapper = (WrapperInfo)wrapper.clone();
+        }
+
+        return copy;
+    }
+
+    public List<PolicySet> getApplicablePolicySets() {
+        return applicablePolicySets;
+    }
+
+    public List<PolicySet> getPolicySets() {
+        return policySets;
+    }
+
+    public List<Intent> getRequiredIntents() {
+        return requiredIntents;
+    }
+
+    public ExtensionType getExtensionType() {
+        return type;
+    }
+
+    public void setExtensionType(ExtensionType type) {
+        this.type = type;
+    }
+
+    public Map<Object, Object> getAttributes() {
+        return attributes;
+    }
+
+	/**
+	 * Indicates if this operation is an async server style of operation
+	 * @return true if the operation is async server style
+	 */
+	public boolean isAsyncServer() {
+		return false;
+	}
+
+	public List<ParameterMode> getParameterModes() {
+		return this.parameterModes;
+	}
+	
+	public boolean hasHolders() {
+		return this.hasHolders;
+	}
+	
+	public void setHasHolders(boolean value) {
+		this.hasHolders = value;
+	}
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/util/Audit.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/util/Audit.java
new file mode 100644
index 0000000000..343d369fdb
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/util/Audit.java
@@ -0,0 +1,45 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.interfacedef.util;
+
+
+/*
+ * utility to allow building up an audit trail in case reporting is necessary later 
+ * 
+ */
+public class Audit {
+	
+	public static final String seperator = "|||"; 
+	private StringBuffer buf;
+
+	public Audit() {
+		this.buf = new StringBuffer();
+	}
+	public void  append(String str) {
+		buf.append(str);
+	}
+	
+	public void appendSeperator() {
+		buf.append(seperator);
+	}
+	public String toString() {
+		return buf.toString();
+	}
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/util/ElementInfo.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/util/ElementInfo.java
new file mode 100644
index 0000000000..38e33e33d9
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/util/ElementInfo.java
@@ -0,0 +1,115 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.interfacedef.util;
+
+import javax.xml.namespace.QName;
+
+/**
+ * An abstraction of XML schema elements.
+ *
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.asclient
+ */
+public class ElementInfo {
+    private final QName name;
+    private final TypeInfo type;
+    private boolean many = false;
+    private boolean nillable = false;
+
+    /**
+     * @param name
+     * @param type
+     */
+    public ElementInfo(QName name, TypeInfo type) {
+        super();
+        this.name = name;
+        this.type = type;
+    }
+
+    /**
+     * @return the name
+     */
+    public QName getQName() {
+        return name;
+    }
+
+    /**
+     * @return the type
+     */
+    public TypeInfo getType() {
+        return type;
+    }
+
+    @Override
+    public String toString() {
+        StringBuffer sb = new StringBuffer();
+        sb.append("Element: ").append(name).append(" ").append(type);
+        return sb.toString();
+    }
+
+    public boolean isMany() {
+        return many;
+    }
+
+    public void setMany(boolean many) {
+        this.many = many;
+    }
+
+    public boolean isNillable() {
+        return nillable;
+    }
+
+    public void setNillable(boolean nillable) {
+        this.nillable = nillable;
+    }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((name == null) ? 0 : name.hashCode());
+        result = prime * result + ((type == null) ? 0 : type.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj)
+            return true;
+        if (obj == null)
+            return false;
+        if (getClass() != obj.getClass())
+            return false;
+        final ElementInfo other = (ElementInfo)obj;
+        if (name == null) {
+            if (other.name != null)
+                return false;
+        } else if (!name.equals(other.name))
+            return false;
+        /*
+        if (type == null) {
+            if (other.type != null)
+                return false;
+        } else if (!type.equals(other.type))
+            return false;
+        */    
+        return true;
+    }
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/util/FaultException.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/util/FaultException.java
new file mode 100644
index 0000000000..334c826f86
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/util/FaultException.java
@@ -0,0 +1,83 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.interfacedef.util;
+
+import javax.xml.namespace.QName;
+
+/**
+ * The generic java exception to wrap service faults
+ * 
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.asclient
+ */
+public class FaultException extends Exception {
+    private static final long serialVersionUID = -8002583655240625792L;
+    private transient Object faultInfo; // FIXME: How to serialize it?
+    private QName faultName;
+
+    /**
+     * @param message
+     * @param faultInfo
+     */
+    public FaultException(String message, Object faultInfo) {
+        super(message);
+        this.faultInfo = faultInfo;
+    }
+
+    /**
+     * @param message
+     * @param faultInfo
+     * @param cause
+     */
+    public FaultException(String message, Object faultInfo, Throwable cause) {
+        super(message, cause);
+        this.faultInfo = faultInfo;
+    }
+
+    /**
+     * @return the faultInfo
+     */
+    public Object getFaultInfo() {
+        return faultInfo;
+    }
+
+    public QName getFaultName() {
+        return faultName;
+    }
+
+    public void setFaultName(QName logical) {
+        this.faultName = logical;
+    }
+
+    public boolean isMatchingType(Object type) {
+        if (faultName == null) {
+            return false;
+        }
+
+        if ((type instanceof QName) && faultName.equals(type)) {
+            return true;
+        }
+        if (type instanceof XMLType && faultName.equals(((XMLType)type).getElementName())) {
+            return true;
+        }
+        return false;
+    }
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/util/JavaXMLMapper.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/util/JavaXMLMapper.java
new file mode 100644
index 0000000000..849b922285
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/util/JavaXMLMapper.java
@@ -0,0 +1,144 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.interfacedef.util;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import javax.xml.namespace.QName;
+
+/**
+ * Utility class that can be used to map XSD types to Java classes and Java classes to XSD types.
+ *
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.asclient
+ */
+public final class JavaXMLMapper {
+    public static final String URI_2001_SCHEMA_XSD = "http://www.w3.org/2001/XMLSchema";
+    private static final Map<Class, QName> JAVA2XML = new HashMap<Class, QName>();
+    private static final Map<String, Class> XML2JAVA = new HashMap<String, Class>();
+
+    private JavaXMLMapper() {
+    }
+
+    static {
+        JAVA2XML.put(boolean.class, getTypeName("boolean"));
+        JAVA2XML.put(byte.class, getTypeName("byte"));
+        JAVA2XML.put(short.class, getTypeName("short"));
+        JAVA2XML.put(int.class, getTypeName("int"));
+        JAVA2XML.put(long.class, getTypeName("long"));
+        JAVA2XML.put(float.class, getTypeName("float"));
+        JAVA2XML.put(double.class, getTypeName("double"));
+        JAVA2XML.put(Boolean.class, getTypeName("boolean"));
+        JAVA2XML.put(Byte.class, getTypeName("byte"));
+        JAVA2XML.put(Short.class, getTypeName("short"));
+        JAVA2XML.put(Integer.class, getTypeName("int"));
+        JAVA2XML.put(Long.class, getTypeName("long"));
+        JAVA2XML.put(Float.class, getTypeName("float"));
+        JAVA2XML.put(Double.class, getTypeName("double"));
+        JAVA2XML.put(java.lang.String.class, getTypeName("string"));
+        JAVA2XML.put(java.math.BigInteger.class, getTypeName("integer"));
+        JAVA2XML.put(java.math.BigDecimal.class, getTypeName("decimal"));
+        JAVA2XML.put(java.util.Calendar.class, getTypeName("dateTime"));
+        JAVA2XML.put(java.util.Date.class, getTypeName("dateTime"));
+        JAVA2XML.put(javax.xml.namespace.QName.class, getTypeName("QName"));
+        JAVA2XML.put(java.net.URI.class, getTypeName("string"));
+        JAVA2XML.put(javax.xml.datatype.XMLGregorianCalendar.class, getTypeName("anySimpleType"));
+        JAVA2XML.put(javax.xml.datatype.Duration.class, getTypeName("duration"));
+        JAVA2XML.put(java.lang.Object.class, getTypeName("anyType"));
+        JAVA2XML.put(java.awt.Image.class, getTypeName("base64Binary"));
+        JAVA2XML.put(byte[].class, getTypeName("base64Binary"));
+        // java2XSD.put(javax.activation.DataHandler.class, getTypeName("base64Binary"));
+        JAVA2XML.put(javax.xml.transform.Source.class, getTypeName("base64Binary"));
+        JAVA2XML.put(java.util.UUID.class, getTypeName("string"));
+    }
+
+    static {
+        XML2JAVA.put("string", java.lang.String.class);
+        XML2JAVA.put("integer", java.math.BigInteger.class);
+        XML2JAVA.put("int", int.class);
+        XML2JAVA.put("long", long.class);
+        XML2JAVA.put("short", short.class);
+        XML2JAVA.put("decimal", java.math.BigDecimal.class);
+        XML2JAVA.put("float", float.class);
+        XML2JAVA.put("double", double.class);
+        XML2JAVA.put("boolean", boolean.class);
+        XML2JAVA.put("byte", byte.class);
+        XML2JAVA.put("QName", javax.xml.namespace.QName.class);
+        XML2JAVA.put("dateTime", javax.xml.datatype.XMLGregorianCalendar.class);
+        XML2JAVA.put("base64Binary", byte[].class);
+        XML2JAVA.put("hexBinary", byte[].class);
+        XML2JAVA.put("unsignedInt", long.class);
+        XML2JAVA.put("unsignedShort", int.class);
+        XML2JAVA.put("unsignedByte", short.class);
+        XML2JAVA.put("time", javax.xml.datatype.XMLGregorianCalendar.class);
+        XML2JAVA.put("date", javax.xml.datatype.XMLGregorianCalendar.class);
+        XML2JAVA.put("gDay", javax.xml.datatype.XMLGregorianCalendar.class);
+        XML2JAVA.put("gMonth", javax.xml.datatype.XMLGregorianCalendar.class);
+        XML2JAVA.put("gYear", javax.xml.datatype.XMLGregorianCalendar.class);
+        XML2JAVA.put("gYearMonth", javax.xml.datatype.XMLGregorianCalendar.class);
+        XML2JAVA.put("gMonthDay", javax.xml.datatype.XMLGregorianCalendar.class);
+        XML2JAVA.put("anySimpleType", java.lang.Object.class); // For elements
+        // XML2JAVA.put("anySimpleType", java.lang.String.class); // For
+        // attributes
+        XML2JAVA.put("duration", javax.xml.datatype.Duration.class);
+        XML2JAVA.put("NOTATION", javax.xml.namespace.QName.class);
+    }
+
+    public static Class getJavaType(QName xmlType) {
+        if (URI_2001_SCHEMA_XSD.equals(xmlType.getNamespaceURI())) {
+            return XML2JAVA.get(xmlType.getLocalPart());
+        } else {
+            return null;
+        }
+    }
+
+    private static QName getTypeName(String name) {
+        return new QName(URI_2001_SCHEMA_XSD, name);
+    }
+
+    public static QName getXMLType(Class javaType) {
+        return JAVA2XML.get(javaType);
+    }
+    
+    private static String getPackageName(Class<?> cls) {
+        String name = cls.getName();
+        int index = name.lastIndexOf('.');
+        return index == -1 ? "" : name.substring(0, index);
+    }
+
+    public static String getNamespace(Class<?> cls) {
+        String packageName = getPackageName(cls);
+        if ("".equals(packageName)) {
+            return "";
+        }
+        StringBuffer ns = new StringBuffer("http://");
+        String[] names = packageName.split("\\.");
+        for (int i = names.length - 1; i >= 0; i--) {
+            ns.append(names[i]);
+            if (i != 0) {
+                ns.append('.');
+            }
+        }
+        ns.append('/');
+        return ns.toString();
+    }
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/util/TypeInfo.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/util/TypeInfo.java
new file mode 100644
index 0000000000..abae4e7e38
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/util/TypeInfo.java
@@ -0,0 +1,101 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.interfacedef.util;
+
+import javax.xml.namespace.QName;
+
+/**
+ * An abstraction of XML schema types
+ *
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.asclient
+ */
+public class TypeInfo {
+    private QName name;
+
+    private boolean isSimpleType;
+
+    private TypeInfo baseType;
+
+    /**
+     * @param name
+     * @param isSimpleType
+     */
+    public TypeInfo(QName name, boolean isSimpleType, TypeInfo baseType) {
+        super();
+        this.name = name;
+        this.isSimpleType = isSimpleType;
+        this.baseType = baseType;
+    }
+
+    /**
+     * @return the isSimpleType
+     */
+    public boolean isSimpleType() {
+        return isSimpleType;
+    }
+
+    /**
+     * @return the name
+     */
+    public QName getQName() {
+        return name;
+    }
+
+    /**
+     * @return the baseType
+     */
+    public TypeInfo getBaseType() {
+        return baseType;
+    }
+
+    @Override
+    public String toString() {
+        StringBuffer sb = new StringBuffer();
+        sb.append("Type: ").append(name);
+        return sb.toString();
+    }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((name == null) ? 0 : name.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj)
+            return true;
+        if (obj == null)
+            return false;
+        if (getClass() != obj.getClass())
+            return false;
+        final TypeInfo other = (TypeInfo)obj;
+        if (name == null) {
+            if (other.name != null)
+                return false;
+        } else if (!name.equals(other.name))
+            return false;
+        return true;
+    }
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/util/WrapperInfo.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/util/WrapperInfo.java
new file mode 100644
index 0000000000..2252434c39
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/util/WrapperInfo.java
@@ -0,0 +1,204 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.interfacedef.util;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.tuscany.sca.interfacedef.DataType;
+import org.apache.tuscany.sca.interfacedef.impl.DataTypeImpl;
+
+/**
+ * The "Wrapper Style" WSDL operation is defined by The Java API for XML-Based
+ * Web Services (JAX-WS) 2.0 specification, section 2.3.1.2 Wrapper Style. <p/>
+ * A WSDL operation qualifies for wrapper style mapping only if the following
+ * criteria are met:
+ * <ul>
+ * <li>(i) The operation�s input and output messages (if present) each contain
+ * only a single part
+ * <li>(ii) The input message part refers to a global element declaration whose
+ * localname is equal to the operation name
+ * <li>(iii) The output message part refers to a global element declaration
+ * <li>(iv) The elements referred to by the input and output message parts
+ * (henceforth referred to as wrapper elements) are both complex types defined
+ * using the xsd:sequence compositor
+ * <li>(v) The wrapper elements only contain child elements, they must not
+ * contain other structures such as wildcards (element or attribute),
+ * xsd:choice, substitution groups (element references are not permitted) or
+ * attributes; furthermore, they must not be nillable.
+ * </ul>
+ * 
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.asclient
+ */
+public class WrapperInfo implements Cloneable {
+    private ElementInfo inputWrapperElement;
+
+    private ElementInfo outputWrapperElement;
+
+    private List<ElementInfo> inputChildElements;
+
+    private List<ElementInfo> outputChildElements;
+
+    // The data type of the unwrapped input child elements 
+    private DataType<List<DataType>> unwrappedInputType;
+
+    // The data type of the unwrapped output child element (we only supports one child)
+    private DataType<XMLType> unwrappedOutputType;
+
+    // The data for the input/output wrappers
+    private String dataBinding;
+
+    // The data type for the input (request) wrapper bean
+    private DataType<XMLType> inputWrapperType;
+    // The data type for the output (response) wrapper bean
+    private DataType<XMLType> outputWrapperType;
+
+    public WrapperInfo(String dataBinding,
+                       ElementInfo inputWrapperElement,
+                       ElementInfo outputWrapperElement,
+                       List<ElementInfo> inputElements,
+                       List<ElementInfo> outputElements) {
+        super();
+        this.dataBinding = dataBinding;
+        this.inputWrapperElement = inputWrapperElement;
+        this.outputWrapperElement = outputWrapperElement;
+        this.inputChildElements = inputElements;
+        this.outputChildElements = outputElements;
+    }
+
+    /**
+     * @return the inputElements
+     */
+    public List<ElementInfo> getInputChildElements() {
+        return inputChildElements;
+    }
+
+    /**
+     * @return the inputWrapperElement
+     */
+    public ElementInfo getInputWrapperElement() {
+        return inputWrapperElement;
+    }
+
+    /**
+     * @return the outputElements
+     */
+    public List<ElementInfo> getOutputChildElements() {
+        return outputChildElements;
+    }
+
+    /**
+     * @return the outputWrapperElement
+     */
+    public ElementInfo getOutputWrapperElement() {
+        return outputWrapperElement;
+    }
+
+    /**
+     * @return the unwrappedInputType
+     */
+    public DataType<List<DataType>> getUnwrappedInputType() {
+        if (unwrappedInputType == null) {
+            List<DataType> childTypes = new ArrayList<DataType>();
+            for (ElementInfo element : getInputChildElements()) {
+                DataType type = getDataType(element);
+                childTypes.add(type);
+            }
+            unwrappedInputType = new DataTypeImpl<List<DataType>>("idl:unwrapped.input", Object[].class, childTypes);
+        }
+        return unwrappedInputType;
+    }
+
+    private DataType getDataType(ElementInfo element) {
+        DataType type = null;
+        if (element.isMany()) {
+            DataType logical = new DataTypeImpl<XMLType>(dataBinding, Object.class, new XMLType(element));
+            type = new DataTypeImpl<DataType>("java:array", Object[].class, logical);
+        } else {
+            type = new DataTypeImpl<XMLType>(dataBinding, Object.class, new XMLType(element));
+        }
+        return type;
+    }
+
+    /**
+     * @return the unwrappedOutputType
+     */
+    public DataType getUnwrappedOutputType() {
+        if (unwrappedOutputType == null) {
+            List<ElementInfo> elements = getOutputChildElements();
+            if (elements != null && elements.size() > 0) {
+                if (elements.size() > 1) {
+                    // We don't support output with multiple parts
+                    // throw new IllegalArgumentException("Multi-part output is not supported");
+                }
+                ElementInfo element = elements.get(0);
+
+                unwrappedOutputType = getDataType(element);
+            }
+        }
+        return unwrappedOutputType;
+    }
+
+    public Class<?> getInputWrapperClass() {
+        return inputWrapperType == null ? null : inputWrapperType.getPhysical();
+    }
+
+    public Class<?> getOutputWrapperClass() {
+        return outputWrapperType == null ? null : outputWrapperType.getPhysical();
+    }
+
+    public String getDataBinding() {
+        return dataBinding;
+    }
+
+    public void setDataBinding(String dataBinding) {
+        this.dataBinding = dataBinding;
+    }
+
+    public DataType<XMLType> getInputWrapperType() {
+        return inputWrapperType;
+    }
+
+    public void setInputWrapperType(DataType<XMLType> inputWrapperType) {
+        this.inputWrapperType = inputWrapperType;
+    }
+
+    public DataType<XMLType> getOutputWrapperType() {
+        return outputWrapperType;
+    }
+
+    public void setOutputWrapperType(DataType<XMLType> outputWrapperType) {
+        this.outputWrapperType = outputWrapperType;
+    }
+
+    @Override
+    public Object clone() throws CloneNotSupportedException {
+        WrapperInfo copy = (WrapperInfo) super.clone();
+        if (inputWrapperType != null) {
+            copy.inputWrapperType = (DataType<XMLType>)inputWrapperType.clone();
+        }
+        if (outputWrapperType != null) {
+            copy.outputWrapperType = (DataType<XMLType>)outputWrapperType.clone();
+        }
+        return copy;
+
+    }
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/util/XMLType.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/util/XMLType.java
new file mode 100644
index 0000000000..fd1b840b17
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/util/XMLType.java
@@ -0,0 +1,153 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.interfacedef.util;
+
+import javax.xml.namespace.QName;
+
+/**
+ * The metadata for an XML element or type.
+ *
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.asclient
+ */
+public class XMLType {
+    public static final XMLType UNKNOWN = new XMLType(null, null);
+    protected QName element;
+    protected QName type;
+    protected boolean nillable = true;
+    protected boolean many = false;
+
+    /**
+     * @param element
+     */
+    public XMLType(ElementInfo element) {
+        super();
+        this.element = element.getQName();
+        if (element.getType() != null) {
+            this.type = element.getType().getQName();
+        }
+    }
+
+    /**
+     * @param element
+     */
+    public XMLType(TypeInfo type) {
+        this.element = null;
+        this.type = type.getQName();
+    }
+
+    public XMLType(QName element, QName type) {
+        this.element = element;
+        this.type = type;
+    }
+
+    /**
+     * @return the type
+     */
+    public QName getTypeName() {
+        return type;
+    }
+
+    public boolean isElement() {
+        return element != null;
+    }
+
+    public QName getElementName() {
+        return element;
+    }
+
+    public void setElementName(QName element) {
+        this.element = element;
+    }
+
+    public void setTypeName(QName type) {
+        this.type = type;
+    }
+
+    public static XMLType getType(QName type) {
+        return new XMLType(null, type);
+    }
+
+    /**
+     * @see java.lang.Object#hashCode()
+     */
+    @Override
+    public int hashCode() {
+        final int PRIME = 31;
+        int result = 1;
+        result = PRIME * result + ((element == null) ? 0 : element.hashCode());
+        result = PRIME * result + ((type == null) ? 0 : type.hashCode());
+        return result;
+    }
+
+    /**
+     * @see java.lang.Object#equals(java.lang.Object)
+     */
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (getClass() != obj.getClass()) {
+            return false;
+        }
+        final XMLType other = (XMLType)obj;
+        if (element == null) {
+            if (other.element != null) {
+                return false;
+            }
+        } else if (!element.equals(other.element)) {
+            return false;
+        }
+        if (type == null) {
+            if (other.type != null) {
+                return false;
+            }
+        } else if (!type.equals(other.type)) {
+            return false;
+        }
+        return true;
+    }
+
+    @Override
+    public String toString() {
+        return "Element: " + element + " Type: " + type;
+    }
+
+    public boolean isNillable() {
+        return nillable;
+    }
+
+    public void setNillable(boolean niable) {
+        this.nillable = niable;
+    }
+
+    public boolean isMany() {
+        return many;
+    }
+
+    public void setMany(boolean many) {
+        this.many = many;
+    }
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/BindingType.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/BindingType.java
new file mode 100644
index 0000000000..f43c428563
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/BindingType.java
@@ -0,0 +1,27 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.policy;
+
+
+/**
+ * Definition of binding type which extends from sca:binding
+ */
+public interface BindingType extends ExtensionType {
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/DefaultPolicyFactory.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/DefaultPolicyFactory.java
new file mode 100644
index 0000000000..2da41675a1
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/DefaultPolicyFactory.java
@@ -0,0 +1,30 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.policy;
+
+import org.apache.tuscany.sca.policy.impl.PolicyFactoryImpl;
+
+/**
+ * A factory for the policy model.
+ * 
+ * @version $Rev$ $Date$
+ */
+public class DefaultPolicyFactory extends PolicyFactoryImpl implements PolicyFactory {
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/ExtensionType.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/ExtensionType.java
new file mode 100644
index 0000000000..f8f8a48b06
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/ExtensionType.java
@@ -0,0 +1,82 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.policy;
+
+import java.util.List;
+
+import javax.xml.namespace.QName;
+
+/**
+ * Definition of extension type: binding or implementation
+ * @tuscany.spi.extension.asclient
+ */
+public interface ExtensionType {
+    QName BINDING_BASE = new QName("http://docs.oasis-open.org/ns/opencsa/sca/200912", "binding");
+    QName IMPLEMENTATION_BASE = new QName("http://docs.oasis-open.org/ns/opencsa/sca/200912", "implementation");
+
+    /**
+     * The name of the extension type (binding or implementation). The extension type name 
+     * attribute MUST be the QName of an XSD global element definition used for 
+     * binding/implementation elements of that type
+     * 
+     * @return The QName of this type
+     */
+    QName getType();
+
+    /**
+     * Set the QName for this type
+     * @param type The QName of this type
+     */
+    void setType(QName type);
+    
+    QName getBaseType();
+
+    /**
+     * A set of intents. The intents in the alwaysProvides set are always 
+     * provided by this extension type, whether the intents are attached 
+     * to the using component or not.
+     * 
+     * @return A list of intents that are always provided by this type
+     */
+    List<Intent> getAlwaysProvidedIntents();
+
+    /**
+     * a set of intents. The intents in the mayProvide set are provided by this 
+     * extension type if the intent in question is attached to the using 
+     * component.
+     * 
+     * @return A list of intents that may be provided by this type
+     */
+    List<Intent> getMayProvidedIntents();
+    /**
+     * Returns true if the model element is unresolved.
+     * 
+     * @return true if the model element is unresolved.
+     */
+    boolean isUnresolved();
+
+    /**
+     * Sets whether the model element is unresolved.
+     * 
+     * @param unresolved whether the model element is unresolved
+     */
+    void setUnresolved(boolean unresolved);
+    
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/ExternalAttachment.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/ExternalAttachment.java
new file mode 100644
index 0000000000..5bccf51b91
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/ExternalAttachment.java
@@ -0,0 +1,85 @@
+/*

+ * Licensed to the Apache Software Foundation (ASF) under one

+ * or more contributor license agreements.  See the NOTICE file

+ * distributed with this work for additional information

+ * regarding copyright ownership.  The ASF licenses this file

+ * to you under the Apache License, Version 2.0 (the

+ * "License"); you may not use this file except in compliance

+ * with the License.  You may obtain a copy of the License at

+ * 

+ *   http://www.apache.org/licenses/LICENSE-2.0

+ * 

+ * Unless required by applicable law or agreed to in writing,

+ * software distributed under the License is distributed on an

+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

+ * KIND, either express or implied.  See the License for the

+ * specific language governing permissions and limitations

+ * under the License.    

+ */

+package org.apache.tuscany.sca.policy;

+

+import java.util.List;

+

+import javax.xml.xpath.XPathExpression;

+

+/*

+ * Represents an external attachment element. See the Policy Framework specification for a

+ * description of this element.

+ *

+ * @version $Rev: 937291 $ $Date: 2010-04-23 06:41:24 -0700 (Fri, 23 Apr 2010) $

+ * @tuscany.spi.extension.asclient

+ */

+

+

+public interface ExternalAttachment {

+	

+	/**

+	 * Get the attachTo attribute

+	 * @return

+	 */

+	String getAttachTo();

+	

+	/**

+	 * Set the attachTo attribute

+	 * @param name

+	 */

+	void setAttachTo(String name);

+	

+	/**

+	 * Get the compiled XPath attachTo expression

+	 * @return

+	 */

+	XPathExpression getAttachToXPathExpression();

+	

+	/**

+	 * Set the compiled XPath attachTo expression 

+	 * @param expression

+	 */

+	void setAttachToXPathExpression(XPathExpression expression);

+	

+	/**

+	 * Get the policy sets associated with this ExternalAttachment

+	 * @return

+	 */

+	List<PolicySet> getPolicySets();

+	

+	/**

+	 * Get the intents associated with this ExternalAttachment

+	 * @return

+	 */

+	List<Intent> getIntents();

+	

+	 /**

+     * Returns true if the model element is unresolved.

+     * 

+     * @return true if the model element is unresolved.

+     */

+    boolean isUnresolved();

+

+    /**

+     * Sets whether the model element is unresolved.

+     * 

+     * @param unresolved whether the model element is unresolved

+     */

+    void setUnresolved(boolean unresolved);

+}

diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/ImplementationType.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/ImplementationType.java
new file mode 100644
index 0000000000..d142015f57
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/ImplementationType.java
@@ -0,0 +1,27 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.policy;
+
+
+/**
+ * Definition of an implementation type which extends from sca:implementation
+ */
+public interface ImplementationType extends ExtensionType {
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/Intent.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/Intent.java
new file mode 100644
index 0000000000..b2578fab49
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/Intent.java
@@ -0,0 +1,161 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.policy;
+
+import java.util.List;
+
+import javax.xml.namespace.QName;
+
+/**
+ * Represents a policy intent. See the Policy Framework specification for a
+ * description of this element.
+ *
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.asclient
+ */
+public interface Intent {
+    enum Type {
+        interaction, implementation
+    };
+
+    /**
+     * Returns the intent name.
+     * 
+     * @return the intent name
+     */
+    QName getName();
+
+    /**
+     * Sets the intent name
+     * 
+     * @param name the intent name
+     */
+    void setName(QName name);
+
+    /**
+     * Returns the list of SCA constructs that this intent is meant to
+     * configure.
+     * 
+     * @return the list of SCA constructs that this intent is meant to configure
+     */
+    List<ExtensionType> getConstrainedTypes();
+
+    /**
+     * Return a list of required intents
+     * @return The list of required intents
+     */
+    List<Intent> getRequiredIntents();
+
+    /**
+     * Returns the list of intents which are mutually exclusive with this intent.
+     * 
+     * @return the list of mutually exclusive intents.
+     */
+    List<Intent> getExcludedIntents();
+
+    /**
+     * Returns the list of qualified intents.  
+     * 
+     * @return the list of qualified intents.
+     */
+    List<Intent> getQualifiedIntents();
+
+    /**
+     * Get the default qualified intent
+     * 
+     * @return
+     */
+    Intent getDefaultQualifiedIntent();
+
+    /**
+     * Set the default qualified intent
+     * 
+     * @param qualifiedIntent
+     */
+    void setDefaultQualifiedIntent(Intent qualifiedIntent);
+
+    /**
+     * Get the intent type: Interaction or Implementation
+     * @return 
+     */
+    Type getType();
+
+    /**
+     * Set the intent type 
+     * @param type: Interaction or Implementation
+     */
+    void setType(Type type);
+
+    /**
+     * If this attribute is present and has a value of true it indicates that 
+     * the qualified intents defined for this intent are mutually exclusive
+     * 
+     * @return
+     */
+    boolean isMutuallyExclusive();
+
+    /**
+     * Set the value of mutuallyExclusive  
+     * @param mutuallyExclusive
+     */
+    void setMutuallyExclusive(boolean mutuallyExclusive);
+
+    /**
+     * Returns the intent description.
+     * 
+     * @return the intent description
+     */
+    String getDescription();
+
+    /**
+     * Sets the intent description.
+     * 
+     * @param description the intent description
+     */
+    void setDescription(String description);
+
+    /**
+     * Returns true if the model element is unresolved.
+     * 
+     * @return true if the model element is unresolved.
+     */
+
+    /**
+     * Get the parent intent for a qualified intent. If an intent is not qualified,
+     * return null.
+     * @return The parent intent or null if this intent is not qualified
+     */
+    Intent getQualifiableIntent();
+
+    /**
+     * Set the parent intent for a qualified intent
+     * @param intent
+     */
+    void setQualifiableIntent(Intent intent);
+
+    boolean isUnresolved();
+
+    /**
+     * Sets whether the model element is unresolved.
+     * 
+     * @param unresolved whether the model element is unresolved
+     */
+    void setUnresolved(boolean unresolved);
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/IntentMap.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/IntentMap.java
new file mode 100644
index 0000000000..5b401baeb3
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/IntentMap.java
@@ -0,0 +1,49 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.policy;
+
+import java.util.List;
+
+
+/**
+ * Map policies to the qualified intents
+ */
+public interface IntentMap {
+    /**
+     * Returns the intent realized by this intent map.
+     * 
+     * @return the intent realized by this intent map
+     */
+    Intent getProvidedIntent();
+
+    /**
+     * Sets the intent realized by this intent map.
+     * 
+     * @param providedIntent the intent realized by this intent map
+     */
+    void setProvidedIntent(Intent providedIntent);
+    
+    /**
+     * Get a list of qualifiers  
+     * 
+     * @return A list of qualifiers
+     */
+    List<Qualifier> getQualifiers();
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/PolicyAttachment.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/PolicyAttachment.java
new file mode 100644
index 0000000000..ee4f5b5236
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/PolicyAttachment.java
@@ -0,0 +1,31 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.policy;
+
+import java.util.List;
+
+/**
+ * Attach a policySet to a collection of policy subjects
+ */
+public interface PolicyAttachment {
+    PolicySet getPolicySet();
+    void setPolicySet(PolicySet policySet);
+    List<PolicySubject> getPolicySubjects();
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/PolicyContainer.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/PolicyContainer.java
new file mode 100644
index 0000000000..6bb7244e05
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/PolicyContainer.java
@@ -0,0 +1,37 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.policy;
+
+/**
+ * Base interface for policy models. Mainly allows policies to hold 
+ * other policies
+ *
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.inheritfrom
+ */
+public interface PolicyContainer {
+    /**
+     * For complex policy models, such as ws-policy, 
+     * a policy provider may only match against one of a 
+     * number of child policy models
+     * 
+     * @return the matching child policy object or null
+     */
+    <T> Object getChildPolicy(Class<T> policyType);
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/PolicyExpression.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/PolicyExpression.java
new file mode 100644
index 0000000000..b7de263789
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/PolicyExpression.java
@@ -0,0 +1,66 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.policy;
+
+import javax.xml.namespace.QName;
+
+/**
+ * Interface that will abstract various types of policy specifications
+ * and attachments for example WS-Policy
+ *
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.asclient
+ */
+public interface PolicyExpression {
+    /**
+     * Get the QName of the policy expression
+     * @return the QName of the policy expression
+     */
+    QName getName();
+
+    /**
+     * Set the QName of the policy expression
+     * @param name
+     */
+    void setName(QName name);
+
+    /**
+     * Get the policy definition in the type of the specific domain
+     * @return
+     */
+    <T> T getPolicy();
+
+    /**
+     * Set the policy definition
+     * @param expression
+     */
+    <T> void setPolicy(T policy);
+
+    /**
+     * 
+     * @param unresolved
+     */
+    void setUnresolved(boolean unresolved);
+
+    /**
+     * 
+     * @return
+     */
+    boolean isUnresolved();
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/PolicyFactory.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/PolicyFactory.java
new file mode 100644
index 0000000000..b23060dafb
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/PolicyFactory.java
@@ -0,0 +1,72 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.policy;
+
+/**
+ * A factory for the policy model.
+ *
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.asclient
+ */
+public interface PolicyFactory {
+
+    /**
+     * Create a new intent.
+     * 
+     * @return a new intent
+     */
+    Intent createIntent();
+
+    /**
+     * Create a new policy set.
+     * 
+     * @return a new policy set
+     */
+    PolicySet createPolicySet();
+
+    /**
+     * Create a new intent map.
+     * 
+     * @return a new intent map
+     */
+    IntentMap createIntentMap();
+
+    /**
+     * create a new Qualifier
+     * 
+     * @return a Qualifier
+     */
+    Qualifier createQualifier();
+    
+    /**
+     * Create a new PolicyExpression
+     * @return
+     */
+    PolicyExpression createPolicyExpression();
+    
+    ExtensionType createExtensionType();
+    BindingType createBindingType();
+    ImplementationType createImplementationType();
+
+    /**
+     * Create a new ExternalAttachment
+     * @return
+     */
+    ExternalAttachment createExternalAttachment();
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/PolicySet.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/PolicySet.java
new file mode 100644
index 0000000000..230d635e76
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/PolicySet.java
@@ -0,0 +1,159 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.policy;
+
+import java.util.List;
+
+import javax.xml.namespace.QName;
+import javax.xml.xpath.XPathExpression;
+
+/**
+ * Represents a policy set. See the Policy Framework specification for a
+ * description of this element.
+ *
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.asclient
+ */
+public interface PolicySet {
+
+    /**
+     * Returns the intent name.
+     * 
+     * @return the intent name
+     */
+    QName getName();
+
+    /**
+     * Sets the intent name
+     * 
+     * @param name the intent name
+     */
+    void setName(QName name);
+
+    /**
+     * Returns the list of
+     * 
+     * @return
+     */
+    List<PolicySet> getReferencedPolicySets();
+
+    /**
+     * Returns the list of provided intents
+     * 
+     * @return
+     */
+    List<Intent> getProvidedIntents();
+
+    /**
+     * Returns the list of concrete policies, either WS-Policy policy
+     * attachments, policy references, or policies expressed in another policy
+     * language.
+     * 
+     * @return the list of concrete policies
+     */
+    List<PolicyExpression> getPolicies();
+
+    /**
+     * Returns true if the model element is unresolved.
+     * 
+     * @return true if the model element is unresolved.
+     */
+    boolean isUnresolved();
+
+    /**
+     * Sets whether the model element is unresolved.
+     * 
+     * @param unresolved whether the model element is unresolved
+     */
+    void setUnresolved(boolean unresolved);
+
+    /**
+     * Returns the XPath expression that is to be used to evaluate
+     * if this PolicySet applies to specific policy subject
+     * 
+     * @return the XPath expression
+     */
+    String getAppliesTo();
+
+    /**
+     * Sets the XPath expression that is to be used to evaluate
+     * if this PolicySet applies to specific policy subject
+     * 
+     */
+    void setAppliesTo(String xpath);
+    
+    /**
+     * A string which is an XPath 1.0 expression identifying one or more
+     * elements (policy subject) in the Domain. It is used to declare which 
+     * set of elements the policySet is actually attached to.
+     * 
+     * @return The attachTo XPath
+     */
+    String getAttachTo();
+    
+    /**
+     * Set the attachTo XPath
+     * @param xpath
+     */
+    void setAttachTo(String xpath);
+    
+    /**
+     * Get the resolved XPathExpression for attachTo
+     * @return
+     */
+    XPathExpression getAttachToXPathExpression();
+    
+    /**
+     * Set the resolved XPathExpression for attachTo
+     * @param expression
+     */
+    void setAttachToXPathExpression(XPathExpression expression);
+
+    /**
+     * Returns the policies / policy attachments provided thro intent maps
+     * 
+     * @return
+     */
+    List<IntentMap> getIntentMaps();
+    
+    /**
+     * Get the XPath expression for the appliesTo attribute
+     * @return the XPath expression for the appliesTo attribute
+     */
+    XPathExpression getAppliesToXPathExpression();
+
+    /**
+     * Set the XPath expression for the appliesTo attribute
+     * @param xpathExpression the XPath expression for the appliesTo attribute
+     */
+    void setAppliesToXPathExpression(XPathExpression xpathExpression);
+
+    /**
+     * Returns true if this PolicySet was attached via external attachment
+     * For unattached and directly attached PolicySets, returns false
+     * @return
+     */
+    boolean isExternalAttachment();
+    
+    /**
+     * Sets whether this PolicySet has been attached via external attachment or not
+     * @param value
+     */
+    void setIsExternalAttachment(boolean value);
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/PolicySubject.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/PolicySubject.java
new file mode 100644
index 0000000000..e585fcf384
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/PolicySubject.java
@@ -0,0 +1,57 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.tuscany.sca.policy;
+
+import java.util.List;
+
+/**
+ * A policy subject is an entity in the assembly with which a policy can be
+ * associated.
+ *
+ * For example, a policy subject can be one of the following:
+ * <ul>
+ * <li>composite
+ * <li>component
+ * <li>implementation
+ * <li>service
+ * <li>reference
+ * <li>binding
+ * <li>interface
+ * </ul>
+ * @tuscany.spi.extension.inheritfrom
+ */
+public interface PolicySubject {
+    /**
+     * Get a list of required intents
+     *
+     * @return
+     */
+    List<Intent> getRequiredIntents();
+
+    /**
+     * Get a list of attached policySets
+     *
+     * @return A list of policySets
+     */
+    List<PolicySet> getPolicySets();
+
+    ExtensionType getExtensionType();
+    void setExtensionType(ExtensionType type);
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/Qualifier.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/Qualifier.java
new file mode 100644
index 0000000000..c1862283c7
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/Qualifier.java
@@ -0,0 +1,44 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.policy;
+
+import java.util.List;
+
+/**
+ * A qualifier provides a list of policies for a qualified intent within the IntentMap
+ */
+public interface Qualifier {
+    /**
+     * Get the qualified intent for this qualifier
+     * @return The intent
+     */
+    Intent getIntent();
+
+    /**
+     * Set the qualified intent for this qualifier
+     */
+    void setIntent(Intent intent);
+
+    /**
+     * Get the list of policies provided by this qualifier
+     * @return A list of policies
+     */
+    List<PolicyExpression> getPolicies();
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/BindingTypeImpl.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/BindingTypeImpl.java
new file mode 100644
index 0000000000..1a2a9c5bad
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/BindingTypeImpl.java
@@ -0,0 +1,38 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.policy.impl;
+
+import javax.xml.namespace.QName;
+
+import org.apache.tuscany.sca.policy.BindingType;
+
+/**
+ * Concrete implementation for a BindingType
+ *
+ * @version $Rev$ $Date$
+ */
+public class BindingTypeImpl extends ExtensionTypeImpl implements BindingType {
+    protected BindingTypeImpl() {
+        super();
+    }
+
+    public QName getBaseType() {
+        return BINDING_BASE;
+    }
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/ExtensionTypeImpl.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/ExtensionTypeImpl.java
new file mode 100644
index 0000000000..97fbc19ced
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/ExtensionTypeImpl.java
@@ -0,0 +1,97 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.policy.impl;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import javax.xml.namespace.QName;
+
+import org.apache.tuscany.sca.policy.ExtensionType;
+import org.apache.tuscany.sca.policy.Intent;
+
+/**
+ * Concrete implementation for a BindingType
+ *
+ * @version $Rev$ $Date$
+ */
+public class ExtensionTypeImpl implements ExtensionType {
+
+    private List<Intent> alwaysProvides = new ArrayList<Intent>();
+    private List<Intent> mayProvide = new ArrayList<Intent>();
+    private QName typeName;
+    private boolean unResolved = true;
+
+    protected ExtensionTypeImpl() {
+
+    }
+
+    public List<Intent> getAlwaysProvidedIntents() {
+        return alwaysProvides;
+    }
+
+    public List<Intent> getMayProvidedIntents() {
+        return mayProvide;
+    }
+
+    public QName getType() {
+        return typeName;
+    }
+
+    public void setType(QName type) {
+        this.typeName = type;
+    }
+
+    public boolean isUnresolved() {
+        return unResolved;
+    }
+
+    public void setUnresolved(boolean unresolved) {
+        this.unResolved = unresolved;
+    }
+
+    @Override
+    public int hashCode() {
+        return String.valueOf(getType()).hashCode();
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (obj == this) {
+            return true;
+        } else if (obj instanceof ExtensionTypeImpl) {
+            if (getType() != null) {
+                return getType().equals(((ExtensionTypeImpl)obj).getType());
+            } else {
+                return ((ExtensionTypeImpl)obj).getType() == null;
+            }
+        } else {
+            return false;
+        }
+    }
+
+    @Override
+    public String toString() {
+        return (this.typeName != null) ? getType().toString() : "null";
+    }
+
+    public QName getBaseType() {
+        return null;
+    }
+};
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/ExternalAttachmentImpl.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/ExternalAttachmentImpl.java
new file mode 100644
index 0000000000..1e90e26324
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/ExternalAttachmentImpl.java
@@ -0,0 +1,76 @@
+/*

+ * Licensed to the Apache Software Foundation (ASF) under one

+ * or more contributor license agreements.  See the NOTICE file

+ * distributed with this work for additional information

+ * regarding copyright ownership.  The ASF licenses this file

+ * to you under the Apache License, Version 2.0 (the

+ * "License"); you may not use this file except in compliance

+ * with the License.  You may obtain a copy of the License at

+ * 

+ *   http://www.apache.org/licenses/LICENSE-2.0

+ * 

+ * Unless required by applicable law or agreed to in writing,

+ * software distributed under the License is distributed on an

+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

+ * KIND, either express or implied.  See the License for the

+ * specific language governing permissions and limitations

+ * under the License.    

+ */

+package org.apache.tuscany.sca.policy.impl;

+

+import java.util.ArrayList;

+import java.util.List;

+

+import javax.xml.xpath.XPathExpression;

+

+import org.apache.tuscany.sca.policy.ExternalAttachment;

+

+import org.apache.tuscany.sca.policy.Intent;

+import org.apache.tuscany.sca.policy.PolicySet;

+

+/**

+ * An implementation of ExternalAttachment

+ *

+ */

+public class ExternalAttachmentImpl implements ExternalAttachment {

+	

+	private String attachTo;

+	private List<Intent> intents = new ArrayList<Intent>();

+	private List<PolicySet> policySets = new ArrayList<PolicySet>();

+	private XPathExpression xpath;

+	private boolean isUnresolved;

+	

+

+	public String getAttachTo() {

+		return attachTo;

+	}

+

+	public void setAttachTo(String attachTo) {

+		this.attachTo = attachTo;	

+	}

+

+	public List<PolicySet> getPolicySets() {

+		return this.policySets;

+	}

+

+	public List<Intent> getIntents() {

+		return this.intents;

+	}

+

+	public XPathExpression getAttachToXPathExpression() {

+		return this.xpath;

+	}

+

+	public void setAttachToXPathExpression(XPathExpression expression) {

+		this.xpath = expression;		

+	}

+

+	public boolean isUnresolved() {

+		return this.isUnresolved;

+	}

+

+	public void setUnresolved(boolean unresolved) {

+		this.isUnresolved = unresolved;		

+	}

+

+}

diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/ImplementationTypeImpl.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/ImplementationTypeImpl.java
new file mode 100644
index 0000000000..5c285e4d95
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/ImplementationTypeImpl.java
@@ -0,0 +1,39 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.policy.impl;
+
+import javax.xml.namespace.QName;
+
+import org.apache.tuscany.sca.policy.ImplementationType;
+
+/**
+ * Concrete implementation for a Implementation Type
+ *
+ * @version $Rev$ $Date$
+ */
+public class ImplementationTypeImpl extends ExtensionTypeImpl implements ImplementationType {
+    protected ImplementationTypeImpl() {
+        super();
+    }
+
+    public QName getBaseType() {
+        return IMPLEMENTATION_BASE;
+    }
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/IntentImpl.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/IntentImpl.java
new file mode 100644
index 0000000000..27a77f3ba8
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/IntentImpl.java
@@ -0,0 +1,168 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.policy.impl;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import javax.xml.namespace.QName;
+
+import org.apache.tuscany.sca.policy.ExtensionType;
+import org.apache.tuscany.sca.policy.Intent;
+
+/**
+ * Represents a policy intent.
+ * 
+ * @version $Rev$ $Date$
+ */
+public class IntentImpl implements Intent {
+
+    private QName name;
+    private Type type;
+    private List<ExtensionType> constrainedTypes = new ArrayList<ExtensionType>();
+    private String description;
+    private List<Intent> qualifiedIntents = new ArrayList<Intent>();
+    private Intent defaultQualifiedIntent;
+    private Intent parent;
+    private List<Intent> requiredIntents = new ArrayList<Intent>();
+    private List<Intent> excludedIntents = new ArrayList<Intent>();
+    private boolean mutuallyExclusive;
+    private boolean unresolved = true;
+
+    protected IntentImpl() {
+    }
+
+    public QName getName() {
+        return name;
+    }
+
+    public void setName(QName name) {
+        this.name = name;
+    }
+
+    public List<ExtensionType> getConstrainedTypes() {
+        return constrainedTypes;
+    }
+
+    public void setConstrainedTypes(List<ExtensionType> constrainedTypes) {
+        this.constrainedTypes = constrainedTypes;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+
+    public void setDescription(String description) {
+        this.description = description;
+    }
+
+    public Intent getQualifiableIntent() {
+        return parent;
+    }
+
+    public void setQualifiableIntent(Intent parent) {
+        this.parent = parent;
+    }
+
+    public List<Intent> getQualifiedIntents() {
+        return qualifiedIntents;
+    }
+
+    public void setQualifiedIntents(List<Intent> qualifiedIntents) {
+        this.qualifiedIntents = qualifiedIntents;
+    }
+
+    public List<Intent> getRequiredIntents() {
+        return requiredIntents;
+    }
+
+    public void setRequiredIntents(List<Intent> requiredIntents) {
+        this.requiredIntents = requiredIntents;
+    }
+
+    public List<Intent> getExcludedIntents() {
+        return excludedIntents;
+    }
+
+    public void setExcludedIntents(List<Intent> excludedIntents) {
+        this.excludedIntents = excludedIntents;
+    }
+
+    public boolean isUnresolved() {
+        return unresolved;
+    }
+
+    public void setUnresolved(boolean unresolved) {
+        this.unresolved = unresolved;
+    }
+
+    public Type getType() {
+        return type;
+    }
+
+    public void setType(Type type) {
+        this.type = type;
+    }
+
+    public boolean isMutuallyExclusive() {
+        return mutuallyExclusive;
+    }
+
+    public void setMutuallyExclusive(boolean mutuallyExclusive) {
+        this.mutuallyExclusive = mutuallyExclusive;
+    }
+
+    public Intent getDefaultQualifiedIntent() {
+        return defaultQualifiedIntent;
+    }
+
+    public void setDefaultQualifiedIntent(Intent defaultQualifiedIntent) {
+        this.defaultQualifiedIntent = defaultQualifiedIntent;
+    }
+    
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((name == null) ? 0 : name.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj)
+            return true;
+        if (obj == null)
+            return false;
+        if (getClass() != obj.getClass())
+            return false;
+        IntentImpl other = (IntentImpl)obj;
+        if (name == null) {
+            if (other.name != null)
+                return false;
+        } else if (!name.equals(other.name))
+            return false;
+        return true;
+    }
+    
+    public String toString() {
+        return String.valueOf(name);
+    }
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/IntentMapImpl.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/IntentMapImpl.java
new file mode 100644
index 0000000000..357b7afab4
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/IntentMapImpl.java
@@ -0,0 +1,78 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.policy.impl;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.tuscany.sca.policy.Intent;
+import org.apache.tuscany.sca.policy.IntentMap;
+import org.apache.tuscany.sca.policy.Qualifier;
+
+/**
+ * Represents an intent map.
+ * 
+ * @version $Rev$ $Date$
+ */
+public class IntentMapImpl implements IntentMap {
+
+    private boolean unresolved;
+    private Intent providedIntent;
+    private List<Qualifier> qualifiers = new ArrayList<Qualifier>();
+    
+    protected IntentMapImpl() {
+    }
+
+    public boolean isUnresolved() {
+        return unresolved;
+    }
+
+    public void setUnresolved(boolean unresolved) {
+        this.unresolved = unresolved;
+    }
+
+    public Intent getProvidedIntent() {
+        return providedIntent;
+    }
+
+    public void setProvidedIntent(Intent providedIntent) {
+        this.providedIntent = providedIntent;
+    }
+
+    public List<Qualifier> getQualifiers() {
+        return qualifiers;
+    }
+    
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj)
+            return true;
+        if (obj == null)
+            return false;
+        if (getClass() != obj.getClass())
+            return false;
+        IntentMapImpl other = (IntentMapImpl)obj;
+        if (providedIntent == null) {
+            if (other.providedIntent != null)
+                return false;
+        } else if (!providedIntent.equals(other.providedIntent))
+            return false;
+        return true;
+    }    
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/PolicyExpressionImpl.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/PolicyExpressionImpl.java
new file mode 100644
index 0000000000..b9f9fa5eb4
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/PolicyExpressionImpl.java
@@ -0,0 +1,87 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.policy.impl;
+
+import javax.xml.namespace.QName;
+
+import org.apache.tuscany.sca.policy.PolicyExpression;
+
+public class PolicyExpressionImpl implements PolicyExpression {
+    private QName name;
+    private Object policy;
+    private boolean unresolved = true;
+
+    protected PolicyExpressionImpl() {
+    }
+
+    public QName getName() {
+        return name;
+    }
+
+    @SuppressWarnings("unchecked")
+	public <T> T getPolicy() {
+        return (T)policy;
+    }
+
+    public boolean isUnresolved() {
+        return unresolved;
+    }
+
+    public void setName(QName name) {
+        this.name = name;
+    }
+
+    public <T> void setPolicy(T policy) {
+        this.policy = policy;
+    }
+
+    public void setUnresolved(boolean unresolved) {
+        this.unresolved = unresolved;
+    }
+    
+    public String toString() {
+        return String.valueOf(name);
+    }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((name == null) ? 0 : name.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj)
+            return true;
+        if (obj == null)
+            return false;
+        if (getClass() != obj.getClass())
+            return false;
+        PolicyExpressionImpl other = (PolicyExpressionImpl)obj;
+        if (name == null) {
+            if (other.name != null)
+                return false;
+        } else if (!name.equals(other.name))
+            return false;
+        return true;
+    }
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/PolicyFactoryImpl.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/PolicyFactoryImpl.java
new file mode 100644
index 0000000000..f700f7c41a
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/PolicyFactoryImpl.java
@@ -0,0 +1,76 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.policy.impl;
+
+import org.apache.tuscany.sca.policy.BindingType;
+import org.apache.tuscany.sca.policy.ExtensionType;
+import org.apache.tuscany.sca.policy.ImplementationType;
+import org.apache.tuscany.sca.policy.Intent;
+import org.apache.tuscany.sca.policy.IntentMap;
+import org.apache.tuscany.sca.policy.PolicyExpression;
+import org.apache.tuscany.sca.policy.PolicyFactory;
+import org.apache.tuscany.sca.policy.PolicySet;
+import org.apache.tuscany.sca.policy.Qualifier;
+
+import org.apache.tuscany.sca.policy.ExternalAttachment;
+
+/**
+ * A factory for the policy model.
+ * 
+ * @version $Rev$ $Date$
+ */
+public abstract class PolicyFactoryImpl implements PolicyFactory {
+
+    public Intent createIntent() {
+        return new IntentImpl();
+    }
+
+    public PolicySet createPolicySet() {
+        return new PolicySetImpl();
+    }
+
+    public IntentMap createIntentMap() {
+        return new IntentMapImpl();
+    }
+
+    public Qualifier createQualifier() {
+        return new QualifierImpl();
+    }
+
+    public PolicyExpression createPolicyExpression() {
+        return new PolicyExpressionImpl();
+    }
+    
+    public BindingType createBindingType() {
+        return new BindingTypeImpl();
+    }
+    
+    public ImplementationType createImplementationType() {
+        return new ImplementationTypeImpl();
+    }
+
+    public ExtensionType createExtensionType() {
+        return new ExtensionTypeImpl();
+    }
+    
+    public ExternalAttachment createExternalAttachment() {
+    	return new ExternalAttachmentImpl();
+    }
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/PolicySetImpl.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/PolicySetImpl.java
new file mode 100644
index 0000000000..22e6e4d4cf
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/PolicySetImpl.java
@@ -0,0 +1,154 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.policy.impl;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import javax.xml.namespace.QName;
+import javax.xml.xpath.XPathExpression;
+
+import org.apache.tuscany.sca.policy.Intent;
+import org.apache.tuscany.sca.policy.IntentMap;
+import org.apache.tuscany.sca.policy.PolicyExpression;
+import org.apache.tuscany.sca.policy.PolicySet;
+
+/**
+ * Represents a policy set.
+ * 
+ * @version $Rev$ $Date$
+ */
+public class PolicySetImpl implements PolicySet {
+
+    private QName name;
+    private String appliesTo;
+    private String attachTo;
+    private List<Intent> providedIntents = new ArrayList<Intent>();
+    private List<PolicySet> referencedPolicySets = new ArrayList<PolicySet>();
+    private boolean unresolved = true;
+
+    private XPathExpression appliesToXPathExpression;
+    private XPathExpression attachToXPathExpression;
+
+    private List<IntentMap> intentMaps = new ArrayList<IntentMap>();
+    private List<PolicyExpression> policies = new ArrayList<PolicyExpression>();
+	private boolean isExternalAttachment;
+
+    public QName getName() {
+        return name;
+    }
+
+    public void setName(QName name) {
+        this.name = name;
+    }
+
+    public String getAppliesTo() {
+        return appliesTo;
+    }
+
+    public void setAppliesTo(String appliesTo) {
+        this.appliesTo = appliesTo;
+    }
+
+    public String getAttachTo() {
+        return attachTo;
+    }
+
+    public void setAttachTo(String attachTo) {
+        this.attachTo = attachTo;
+    }
+
+    public boolean isUnresolved() {
+        return unresolved;
+    }
+
+    public void setUnresolved(boolean unresolved) {
+        this.unresolved = unresolved;
+    }
+
+    public XPathExpression getAppliesToXPathExpression() {
+        return appliesToXPathExpression;
+    }
+
+    public void setAppliesToXPathExpression(XPathExpression appliesToXPathExpression) {
+        this.appliesToXPathExpression = appliesToXPathExpression;
+    }
+
+    public XPathExpression getAttachToXPathExpression() {
+        return attachToXPathExpression;
+    }
+
+    public void setAttachToXPathExpression(XPathExpression attachToXPathExpression) {
+        this.attachToXPathExpression = attachToXPathExpression;
+    }
+
+    public List<IntentMap> getIntentMaps() {
+        return intentMaps;
+    }
+
+    public List<Intent> getProvidedIntents() {
+        return providedIntents;
+    }
+
+    public List<PolicySet> getReferencedPolicySets() {
+        return referencedPolicySets;
+    }
+
+    public List<PolicyExpression> getPolicies() {
+        return policies;
+    }
+    
+    public String toString() {
+        return String.valueOf(name);
+    }    
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((name == null) ? 0 : name.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj)
+            return true;
+        if (obj == null)
+            return false;
+        if (getClass() != obj.getClass())
+            return false;
+        PolicySetImpl other = (PolicySetImpl)obj;
+        if (name == null) {
+            if (other.name != null)
+                return false;
+        } else if (!name.equals(other.name))
+            return false;
+        return true;
+    }
+
+	public boolean isExternalAttachment() {
+		return this.isExternalAttachment;
+	}
+
+	public void setIsExternalAttachment(boolean value) {
+		this.isExternalAttachment = value;		
+	}
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/QualifierImpl.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/QualifierImpl.java
new file mode 100644
index 0000000000..102bea8d41
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/QualifierImpl.java
@@ -0,0 +1,48 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.policy.impl;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.tuscany.sca.policy.Intent;
+import org.apache.tuscany.sca.policy.PolicyExpression;
+import org.apache.tuscany.sca.policy.Qualifier;
+
+public class QualifierImpl implements Qualifier {
+    private Intent intent;
+    private List<PolicyExpression> policies = new ArrayList<PolicyExpression>();
+
+    protected QualifierImpl() {
+    }
+
+    public Intent getIntent() {
+        return intent;
+    }
+
+    public List<PolicyExpression> getPolicies() {
+        return policies;
+    }
+
+    public void setIntent(Intent intent) {
+        this.intent = intent;
+    }
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/util/PolicyHelper.java b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/util/PolicyHelper.java
new file mode 100644
index 0000000000..8a4adb3d7f
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/util/PolicyHelper.java
@@ -0,0 +1,130 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.policy.util;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+
+import javax.xml.namespace.QName;
+
+import org.apache.tuscany.sca.assembly.Binding;
+import org.apache.tuscany.sca.definitions.Definitions;
+import org.apache.tuscany.sca.policy.Intent;
+import org.apache.tuscany.sca.policy.PolicyExpression;
+import org.apache.tuscany.sca.policy.PolicySet;
+import org.apache.tuscany.sca.policy.PolicySubject;
+
+/**
+ * A utility that helps to navigate the policy model
+ * @tuscany.spi.extension.asclient
+ */
+public class PolicyHelper {
+    public PolicySet getPolicySet(PolicySubject subject, QName policySetName) {
+        for (PolicySet ps : subject.getPolicySets()) {
+            if (ps.getName().equals(policySetName)) {
+                return ps;
+            }
+        }
+        return null;
+    }
+
+    public Intent getIntent(Definitions subject, QName intentName) {
+        for (Intent i : subject.getIntents()) {
+            if (i.getName().equals(intentName)) {
+                return i;
+            }
+        }
+        return null;
+    }
+
+    public PolicySet getPolicySet(Definitions subject, QName policySetName) {
+        for (PolicySet ps : subject.getPolicySets()) {
+            if (ps.getName().equals(policySetName)) {
+                return ps;
+            }
+        }
+        return null;
+    }
+
+    public Intent getIntent(PolicySubject subject, QName intentName) {
+        for (Intent i : subject.getRequiredIntents()) {
+            if (i.getName().equals(intentName)) {
+                return i;
+            }
+        }
+        return null;
+    }
+
+    public Collection<PolicyExpression> getPolicyExpressions(PolicySubject subject, QName policyName) {
+        Collection<PolicyExpression> policies = new ArrayList<PolicyExpression>();
+        for (PolicySet ps : subject.getPolicySets()) {
+            for (PolicyExpression exp : ps.getPolicies()) {
+                if (exp.getName().equals(policyName)) {
+                    policies.add(exp);
+                }
+            }
+        }
+        return policies;
+    }
+
+    public Collection<Object> getPolicies(PolicySubject subject, QName policyName) {
+        Collection<Object> policies = new ArrayList<Object>();
+        for (PolicySet ps : subject.getPolicySets()) {
+            for (PolicyExpression exp : ps.getPolicies()) {
+                if (exp.getName().equals(policyName)) {
+                    policies.add(exp.getPolicy());
+                }
+            }
+        }
+        return policies;
+    }
+    
+    public static PolicySet getPolicySet(Binding wsBinding, QName intentName) {
+        PolicySet returnPolicySet = null;
+
+        if (wsBinding instanceof PolicySubject) {
+            PolicySubject policiedBinding = (PolicySubject)wsBinding;
+            for (PolicySet policySet : policiedBinding.getPolicySets()) {
+                for (Intent intent : policySet.getProvidedIntents()) {
+                    if (intent.getName().equals(intentName)) {
+                        returnPolicySet = policySet;
+                        break;
+                    }
+                }
+            }
+        }
+
+        return returnPolicySet;
+    }
+
+    public static boolean isIntentRequired(Binding wsBinding, QName intent) {
+        if (wsBinding instanceof PolicySubject) {
+            List<Intent> intents = ((PolicySubject)wsBinding).getRequiredIntents();
+            for (Intent i : intents) {
+                if (intent.equals(i.getName())) {
+                    return true;
+                }
+            }
+        }
+        return getPolicySet(wsBinding, intent) != null;
+    }    
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/resources/META-INF/services/org.apache.tuscany.sca.assembly.AssemblyFactory b/sandbox/sebastien/java/vhost/modules/assembly/src/main/resources/META-INF/services/org.apache.tuscany.sca.assembly.AssemblyFactory
new file mode 100644
index 0000000000..20189eae98
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/resources/META-INF/services/org.apache.tuscany.sca.assembly.AssemblyFactory
@@ -0,0 +1,18 @@
+# Licensed to the Apache Software Foundation (ASF) under one

+# or more contributor license agreements.  See the NOTICE file

+# distributed with this work for additional information

+# regarding copyright ownership.  The ASF licenses this file

+# to you under the Apache License, Version 2.0 (the

+# "License"); you may not use this file except in compliance

+# with the License.  You may obtain a copy of the License at

+# 

+#   http://www.apache.org/licenses/LICENSE-2.0

+# 

+# Unless required by applicable law or agreed to in writing,

+# software distributed under the License is distributed on an

+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

+# KIND, either express or implied.  See the License for the

+# specific language governing permissions and limitations

+# under the License. 

+

+org.apache.tuscany.sca.assembly.DefaultAssemblyFactory

diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/resources/META-INF/services/org.apache.tuscany.sca.assembly.SCABindingFactory b/sandbox/sebastien/java/vhost/modules/assembly/src/main/resources/META-INF/services/org.apache.tuscany.sca.assembly.SCABindingFactory
new file mode 100644
index 0000000000..6e24d0bcfd
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/resources/META-INF/services/org.apache.tuscany.sca.assembly.SCABindingFactory
@@ -0,0 +1,19 @@
+# Licensed to the Apache Software Foundation (ASF) under one

+# or more contributor license agreements.  See the NOTICE file

+# distributed with this work for additional information

+# regarding copyright ownership.  The ASF licenses this file

+# to you under the Apache License, Version 2.0 (the

+# "License"); you may not use this file except in compliance

+# with the License.  You may obtain a copy of the License at

+# 

+#   http://www.apache.org/licenses/LICENSE-2.0

+# 

+# Unless required by applicable law or agreed to in writing,

+# software distributed under the License is distributed on an

+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

+# KIND, either express or implied.  See the License for the

+# specific language governing permissions and limitations

+# under the License. 

+

+org.apache.tuscany.sca.assembly.impl.SCABindingFactoryImpl

+

diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/resources/META-INF/services/org.apache.tuscany.sca.assembly.builder.BuilderExtensionPoint b/sandbox/sebastien/java/vhost/modules/assembly/src/main/resources/META-INF/services/org.apache.tuscany.sca.assembly.builder.BuilderExtensionPoint
new file mode 100644
index 0000000000..61171ac041
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/resources/META-INF/services/org.apache.tuscany.sca.assembly.builder.BuilderExtensionPoint
@@ -0,0 +1,18 @@
+# Licensed to the Apache Software Foundation (ASF) under one

+# or more contributor license agreements.  See the NOTICE file

+# distributed with this work for additional information

+# regarding copyright ownership.  The ASF licenses this file

+# to you under the Apache License, Version 2.0 (the

+# "License"); you may not use this file except in compliance

+# with the License.  You may obtain a copy of the License at

+# 

+#   http://www.apache.org/licenses/LICENSE-2.0

+# 

+# Unless required by applicable law or agreed to in writing,

+# software distributed under the License is distributed on an

+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

+# KIND, either express or implied.  See the License for the

+# specific language governing permissions and limitations

+# under the License. 

+

+org.apache.tuscany.sca.assembly.builder.DefaultBuilderExtensionPoint

diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/resources/META-INF/services/org.apache.tuscany.sca.definitions.DefinitionsFactory b/sandbox/sebastien/java/vhost/modules/assembly/src/main/resources/META-INF/services/org.apache.tuscany.sca.definitions.DefinitionsFactory
new file mode 100644
index 0000000000..c1cb41d967
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/resources/META-INF/services/org.apache.tuscany.sca.definitions.DefinitionsFactory
@@ -0,0 +1,17 @@
+# Licensed to the Apache Software Foundation (ASF) under one

+# or more contributor license agreements.  See the NOTICE file

+# distributed with this work for additional information

+# regarding copyright ownership.  The ASF licenses this file

+# to you under the Apache License, Version 2.0 (the

+# "License"); you may not use this file except in compliance

+# with the License.  You may obtain a copy of the License at

+# 

+#   http://www.apache.org/licenses/LICENSE-2.0

+# 

+# Unless required by applicable law or agreed to in writing,

+# software distributed under the License is distributed on an

+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

+# KIND, either express or implied.  See the License for the

+# specific language governing permissions and limitations

+# under the License. 

+org.apache.tuscany.sca.definitions.DefaultDefinitionsFactory

diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/resources/META-INF/services/org.apache.tuscany.sca.interfacedef.InterfaceContractMapper b/sandbox/sebastien/java/vhost/modules/assembly/src/main/resources/META-INF/services/org.apache.tuscany.sca.interfacedef.InterfaceContractMapper
new file mode 100644
index 0000000000..e2da378609
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/resources/META-INF/services/org.apache.tuscany.sca.interfacedef.InterfaceContractMapper
@@ -0,0 +1,19 @@
+# Licensed to the Apache Software Foundation (ASF) under one

+# or more contributor license agreements.  See the NOTICE file

+# distributed with this work for additional information

+# regarding copyright ownership.  The ASF licenses this file

+# to you under the Apache License, Version 2.0 (the

+# "License"); you may not use this file except in compliance

+# with the License.  You may obtain a copy of the License at

+# 

+#   http://www.apache.org/licenses/LICENSE-2.0

+# 

+# Unless required by applicable law or agreed to in writing,

+# software distributed under the License is distributed on an

+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

+# KIND, either express or implied.  See the License for the

+# specific language governing permissions and limitations

+# under the License. 

+

+org.apache.tuscany.sca.interfacedef.impl.InterfaceContractMapperImpl

+

diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/resources/META-INF/services/org.apache.tuscany.sca.policy.PolicyFactory b/sandbox/sebastien/java/vhost/modules/assembly/src/main/resources/META-INF/services/org.apache.tuscany.sca.policy.PolicyFactory
new file mode 100644
index 0000000000..6ff07189e1
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/resources/META-INF/services/org.apache.tuscany.sca.policy.PolicyFactory
@@ -0,0 +1,18 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+# 
+#   http://www.apache.org/licenses/LICENSE-2.0
+# 
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License. 
+
+org.apache.tuscany.sca.policy.DefaultPolicyFactory

diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/resources/org/apache/tuscany/sca/assembly/builder/assembly-conformance-messages.properties b/sandbox/sebastien/java/vhost/modules/assembly/src/main/resources/org/apache/tuscany/sca/assembly/builder/assembly-conformance-messages.properties
new file mode 100644
index 0000000000..8ded10c9db
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/resources/org/apache/tuscany/sca/assembly/builder/assembly-conformance-messages.properties
@@ -0,0 +1,327 @@
+#
+#
+#    Licensed to the Apache Software Foundation (ASF) under one
+#    or more contributor license agreements. See the NOTICE file
+#    distributed with this work for additional information
+#    regarding copyright ownership. The ASF licenses this file
+#    to you under the Apache License, Version 2.0 (the
+#    "License"); you may not use this file except in compliance
+#    with the License. You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing,
+#    software distributed under the License is distributed on an
+#    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+#    KIND, either express or implied. See the License for the
+#    specific language governing permissions and limitations
+#    under the License.
+#
+#
+# C.1 Mandatory Items
+ASM13001=\
+An SCA runtime MUST reject a composite file that does not conform to the sca-core.xsd, sca-interface-wsdl.xsd, sca-implementation-composite.xsd and sca-binding-sca.xsd schema.
+ASM13002=\
+An SCA runtime MUST reject a contribution file that does not conform to the sca-contribution.xsd schema.
+ASM13003=\
+An SCA runtime MUST reject a definitions file that does not conform to the sca-definitions.xsd schema.
+ASM40001=\
+The extension of a componentType side file name MUST be .componentType.
+ASM40002=\
+If present, the @constrainingType attribute of a <componentType/> element MUST reference a <constrainingType/> element in the Domain through its QName.
+ASM40003=\
+The @name attribute of a <service/> child element of a <componentType/> MUST be unique amongst the service elements of that <componentType/>.
+ASM40004=\
+The @name attribute of a  <reference/> child element of a <componentType/> MUST be unique amongst the reference elements of that <componentType/>.
+ASM40005=\
+The @name attribute of a <property/> child element of a <componentType/> MUST be unique amongst the property elements of that  <componentType/>.
+ASM40006=\
+If @wiredByImpl is set to "true", then any reference targets configured for this reference MUST be ignored by the runtime.  
+ASM40007=\
+The value of the property @type attribute MUST be the QName of an XML schema type.
+ASM40008=\
+The value of the property @element attribute MUST be the QName of an XSD global element.
+ASM40009=\
+The SCA runtime MUST ensure that any implementation default property value is replaced by a value for that property explicitly set by a component using that implementation.
+ASM40010=\
+A single property element MUST NOT contain both a @type attribute and an @element attribute.
+ASM40011=\
+When the componentType has @mustSupply="true" for a property element, a component using the implementation MUST supply a value for the property since the implementation has no default value for the property.
+ASM50001=\ 
+The @name attribute of a <component/> child element of a <composite/> MUST be unique amongst the component elements of that <composite/>
+ASM50002=\
+The @name attribute of a service element of a <component/> MUST be unique amongst the service elements of that <component/>
+ASM50003=\
+The @name attribute of a service element of a <component/> MUST match the @name attribute of a service element of the componentType of the <implementation/> child element of the component.
+ ASM50004=\ 
+If an interface is declared for a component service, the interface MUST provide a compatible subset of the interface declared for the equivalent service in the componentType of the implementation
+ ASM50005=\ 
+If no binding elements are specified for the service, then the bindings specified for the equivalent service in the componentType of the implementation MUST be used, but if the componentType also has no bindings specified, then <binding.sca/> MUST be used as the binding. If binding elements are specified for the service, then those bindings MUST be used and they override any bindings specified for the equivalent service in the componentType of the implementation.
+ASM50006=\ 
+If the callback element is present and contains one or more binding child elements, then those bindings MUST be used for the callback.
+ASM50007=\
+The @name attribute of a reference element of a <component/> MUST be unique amongst the reference elements of that <component/>
+
+ASM50008=\
+The @name attribute of a reference element of a <component/> MUST match the @name attribute of a reference element of the componentType of the <implementation/> child element of the component.
+ASM50009=\
+The value of multiplicity for a component reference MUST only be equal or further restrict any value for the multiplicity of the reference with the same name in the componentType of the implementation, where further restriction means 0..n to 0..1 or 1..n to 1..1.
+ASM50010=\
+If @wiredByImpl="true" is set for a reference, then the reference MUST NOT be wired statically within a composite, but left unwired.
+ ASM50011=\
+If an interface is declared for a component reference, the interface MUST provide a compatible superset of the interface declared for the equivalent reference in the componentType of the implementation.
+ASM50012=\ 
+If no binding elements are specified for the reference, then the bindings specified for the equivalent reference in the componentType of the implementation MUST be used. If binding elements are specified for the reference, then those bindings MUST be used and they override any bindings specified for the equivalent reference in the componentType of the implementation.
+ASM50013=\
+If @wiredByImpl="true", other methods of specifying the target service MUST NOT be used.
+ASM50014=\
+If @autowire="true", the autowire procedure MUST only be used if no target is identified by any of the other ways listed above. It is not an error if @autowire="true" and a target is also defined through some other means, however in this  case the autowire procedure MUST NOT be used.
+ASM50015=\
+If a binding element has a value specified for a target service using its @uri attribute, the binding element MUST NOT identify target services using binding specific attributes or elements.
+ASM50016=\
+It is possible that a particular binding type uses more than a simple URI for the address of a target service. In cases where a reference element has a binding subelement that uses more than simple URI, the @uri attribute of the binding element MUST NOT be used to identify the target service - in this case binding specific attributes and/or child elements MUST be used.
+ASM50018=\
+A reference with multiplicity 0..1 or 0..n MAY have no target service defined.
+ASM50019=\
+A reference with multiplicity 0..1 or 1..1 MUST NOT have more that one target service defined.
+ASM50020=\
+A reference with multiplicity 1..1 or 1..n MUST have at least one target service defined.
+ASM50021=\
+A reference with multiplicity 0..n or 1..n MAY have one or more target services defined.
+ASM50022=\
+Where it is detected that the rules for the number of target services for a reference have been violated, either at deployment or at execution time, an SCA Runtime MUST raise an error no later than when the reference is invoked by the component implementation.
+ASM50025=\
+Where a component reference is promoted by a composite reference, the promotion MUST be treated from a multiplicity perspective as providing 0 or more target services for the component reference, depending upon the further configuration of the composite reference. These target services are in addition to any target services identified on the component reference itself, subject to the rules relating to multiplicity.
+ASM50026=\
+If a reference has a value specified for one or more target services in its @target attribute, there MUST NOT be any child <binding/> elements declared for that reference.
+ASM50027=\
+If the @value attribute of a component property element is declared, the type of the property MUST be an XML Schema simple type and the @value attribute MUST contain a single value of that type.
+ASM50028=\
+If the value subelement of a component property is specified, the type of the property MUST be an XML Schema simple type or an XML schema complex type.
+ASM50029=\
+If a component property value is declared using a child element of the <property/> element, the type of the property MUST be an XML Schema global element and the declared child element MUST be an instance of that global element.
+ASM50030=\
+A <component/> element MUST NOT contain two <property/> subelements with the same value of the @name attribute.
+ASM50031=\
+The @name attribute of a property element of a <component/> MUST be unique amongst the property elements of that <component/>.
+ASM50032
+If a property is single-valued, the <value/> subelement MUST NOT occur more than once.
+ASM50033=\
+A property <value/> subelement MUST NOT be used when the @value attribute is used to specify the value for that property.
+ASM50034=\
+If any <wire/> element with its @replace attribute set to "true" has a particular reference specified in its @source attribute, the value of the @target attribute for that reference MUST be ignored and MUST NOT be used to define target services for that reference.
+ASM50035=\
+A single property element MUST NOT contain both a @type attribute and an @element attribute.
+ASM50036=\
+The property type specified for the property element of a component MUST be compatible with the type of the property with the same @name declared in the component type of the implementation used by the component.  If no type is declared in the component property element, the type of the property declared in the componentType of the implementation MUST be used.
+ASM50037=\
+The @name attribute of a property element of a <component/> MUST match the @name attribute of a property element of the componentType of the <implementation/> child element of the component.
+ASM50038=\
+In these cases where the types of two property elements are matched, the types declared for the two <property/> elements MUST be compatible
+ASM50039=\
+A reference with multiplicity 0..1 MUST have no more than one target service defined.
+ASM50040=\
+A reference with multiplicity 1..1 MUST have exactly one target service defined.
+ASM50041=\
+A reference with multiplicity 1..n MUST have at least one target service defined.
+ASM50042=\
+If a component reference has @multiplicity 0..1 or 1..1 and @nonOverridable==true, then the component reference MUST NOT be promoted by any composite reference.
+ASM60001=\
+A composite @name attribute value MUST be unique within the namespace of the composite.
+ASM60002=\
+@local="true" for a composite means that all the components within the composite MUST run in the same operating system process.
+ASM60003=\
+The name of a composite <service/> element MUST be unique across all the composite services in the composite.
+ASM60004=\
+A composite <service/> element's @promote attribute MUST identify one of the component services within that composite.
+ASM60005=\ 
+If a composite service interface is specified it MUST be the same or a compatible subset of the interface provided by the promoted component service.
+ASM60006=\
+The name of a composite <reference/> element MUST be unique across all the composite references in the composite.
+ASM60007=\
+Each of the URIs declared by a composite reference's @promote attribute MUST identify a component reference within the composite.
+ASM60008=\
+the interfaces of the component references promoted by a composite reference MUST be the same, or if the composite reference itself declares an interface then each of the component reference interfaces MUST be a compatible subset of the composite reference interface..
+ASM60009=\
+the intents declared on a composite reference and on the component references which it promoites MUST NOT be mutually exclusive.
+ASM60010=\
+If any intents in the set which apply to a composite reference are mutually exclusive then the SCA runtime MUST raise an error.
+ASM60011=\
+The value specified for the @multiplicity attribute of a composite reference MUST be compatible with the multiplicity specified on each of the component references which it promotes, i.e. the multplicity of the composite reference MUST be equal to or further restrict the multiplicity of the component reference, except for the case where all the promoted component references have at least one target declared in which case a composite reference of 0..1 is compatble with component references of 1..1 and composite reference of 0..n is compatible with component references of 1..n.
+ASM60012=\ 
+If a composite reference has an interface specified, it MUST provide an interface which is the same or which is a compatible superset of the interface(s) declared by the promoted component reference(s).
+ASM60013=\
+If no interface is declared on a composite reference, the interface from one of its promoted component references MUST be used for the component type associated with the composite.
+ASM60014=\
+The @name attribute of a composite property MUST be unique amongst the properties of the same composite.
+ASM60022=\ 
+For each component reference for which autowire is enabled, the SCA runtime MUST search within the composite for target services which have an interface that is a compatible superset of the interface of the reference.
+ASM60024=\
+The intents, and policies applied to the service MUST be compatible with those on the reference when using autowire to wire a reference - so that wiring the reference to the service will not cause an error due to policy mismatch
+ASM60025=\
+for an autowire reference with multiplicity 0..1 or 1..1, the SCA runtime MUST wire the reference to one of the set of valid target services chosen from the set in a runtime-dependent fashion
+ASM60026=\
+for an autowire reference with multiplicity 0..n or 1..n, the reference MUST be wired to all of the set of valid target services
+ASM60027=\
+for an autowire reference with multiplicity 0..1 or 0..n, if the SCA runtime finds no valid target service, there is no problem - no services are wired and the SCA runtime MUST NOT raise an error
+ASM60028=\
+for an autowire reference with multiplicity 1..1 or 1..n, if the SCA runtime finds no valid target services an error MUST be raised by the SCA runtime since the reference is intended to be wired
+ASM60030=\
+The @name attribute of an <implementation.composite/> element MUST contain the QName of a composite in the SCA Domain.
+ASM60031=\
+The SCA runtime MUST raise an error if the composite resulting from the inclusion of one composite into another is invalid.
+ASM60032=\
+For a composite used as a component implementation, each composite service offered by the composite MUST promote a component service of a component that is within the composite. 
+ASM60033=\
+For a composite used as a component implementation, every component reference of components within the composite with a multiplicity of 1..1 or 1..n MUST be wired or promoted. 
+ASM60034=\
+For a composite used as a component implementation, all properties of components within the composite, where the underlying component implementation specifies "mustSupply=true" for the property, MUST either specify a value for the property or source the value from a composite property. 
+ASM60035=\
+All the component references promoted by a single composite reference MUST have the same value for @wiredByImpl.
+ASM60036=\
+If the @wiredByImpl attribute is not specified on the composite reference, the default value is "true" if all of the promoted component references have a wiredByImpl value of "true", and the default value is "false" if all the promoted component references have a wiredByImpl value of "false". If the @wiredByImpl attribute is specified, its value MUST be "true" if all of the promoted component references have a wiredByImpl value of "true", and its value MUST be "false" if all the promoted component references have a wiredByImpl value of "false".
+ASM60037=\
+<include/> processing MUST take place before the processing of the @promote attribute of a composite reference is performed.
+ASM60038=\
+<include/> processing MUST take place before the processing of the @promote attribute of a composite service is performed.
+ASM60039=\
+<include/> processing MUST take place before the @source and @target attributes of a wire are resolved.
+ASM60040=\
+A single property element MUST NOT contain both a @type attribute and an @element attribute.
+ASM60041=\
+If the included composite has the value true for the attribute @local then the including composite MUST have the same value for the @local attribute, else it is an error.
+ASM60042=\
+The @name attribute of an include element MUST be the QName of a composite in the SCA Domain.
+ASM60043=\
+The interface declared by the target of a wire MUST be a compatible superset of the interface declared by the source of the wire.
+ASM60044=\
+If the composite reference promotes multiple component references with different multiplicities, there is no default value for the @multiplicity attribute of the composite reference and a value for @multiplicity MUST be specified.
+ASM70001=\
+The constrainingType specifies the services, references and properties that MUST be provided by the implementation of the component to which the constrainingType is attached.
+ASM70002=\
+If the configuration of the component or its implementation does not conform to the constrainingType specified on the component element, the SCA runtime MUST raise an error.
+ASM70003=\
+The @name attribute of the constraining type MUST be unique in the SCA Domain.
+ASM70004=\
+When an implementation is constrained by a constrainingType its component type MUST contain all the services, references and properties specified in the constrainingType.
+ASM70005=\
+An implementation that is constrained by a constrainingType MUST NOT contain additional references with @multiplicity=1..1 or @multiplicity=1..n or additional properties with  @mustSupply=true
+ASM70006=\ 
+Additional services, references and properties provided by the implementation which are not declared in the constrainingType associated with a component MUST NOT be configured in any way by the containing composite.
+ASM70007=\
+When an implementation is constrained by a constrainingType and the constrainingType declares an interface for a service or for a reference, then the component type of the implementation MUST contain a declaration of a compatiible interface for that service or reference.
+ASM80001=\
+The interface.wsdl @interface attribute MUST reference a portType of a WSDL 1.1 document.
+ASM80002=\
+Remotable service Interfaces MUST NOT make use of method or operation overloading.
+ASM80003=\
+If a remotable service is called locally or remotely, the SCA container MUST ensure sure that no modification of input messages by the service or post-invocation modifications to return messages are seen by the caller.
+ASM80004=\
+If a reference is defined using a bidirectional interface element, the client component implementation using the reference calls the referenced service using the interface. The client MUST provide an implementation of the callback interface.
+ASM80005=\
+Either both interfaces of a bidirectional service MUST be remotable, or both MUST be local.  A bidirectional service MUST NOT mix local and remote services.
+ASM80008=\
+Any service or reference that uses an interface marked with intents MUST implicitly add those intents to its own @requires list.
+ASM80009=\
+In a bidirectional interface, the service interface can have more than one operation defined, and the callback interface can also have more than one operation defined. SCA runtimes MUST allow an invocation of any operation on the service interface to be followed by zero, one or many invocations of any of the operations on the callback interface.
+ASM80010=\
+Whenever an interface document declaring a callback interface is used in the declaration of an <interface/> element in SCA, it MUST be treated as being bidirectional with the declared callback interface.
+ASM80011=\
+If an <interface/> element references an interface document which declares a callback interface and also itself contains a declaration of a callback interface, the two callback interfaces MUST be compatible.
+ASM80016=\
+The interface.wsdl @callbackInterface attribute, if present, MUST reference a portType of a WSDL 1.1 document.
+ASM80017=\
+WSDL interfaces are always remotable and therefore an <interface.wsdl/> element MUST NOT contain remotable="false".
+ASM90001=\
+For a binding of a reference the @uri attribute defines the target URI of the reference. This MUST be either the componentName/serviceName for a wire to an endpoint within the SCA Domain, or the accessible address of some service endpoint either inside or outside the SCA Domain (where the addressing scheme is defined by the type of the binding).
+ASM90002=\
+When a service or reference has multiple bindings, only one binding can have the default @name value; all others MUST have a @name value specified that is unique within the service or reference.
+ASM90003=\
+If a reference has any bindings, they MUST be resolved, which means that each binding MUST include a value for the @uri attribute or MUST otherwise specify an endpoint. The reference MUST NOT be wired using other SCA mechanisms.
+ ASM90004=\
+To wire to a specific binding of a target service the syntax "componentName/serviceName/bindingName" MUST be used.
+ASM10001=\
+all of the QNames for the definitions contained in definitions.xml files MUST be unique within the Domain.
+ASM10002=\
+An SCA runtime MUST make available to the Domain all the artifacts contained within the definitions.xml files in the Domain.
+ASM10003=\
+An SCA runtime MUST reject a definitions.xml file that does not conform to the sca-definitions.xsd schema.
+ASM12001=\
+For any contribution packaging it MUST be possible to present the artifacts of the packaging to SCA as a hierarchy of resources based off of a single root
+ASM12005=\
+Where present, artifact-related or packaging-related artifact resolution mechanisms MUST be used by the SCA runtime to resolve artifact dependencies.
+ASM12006=\ 
+SCA requires that all runtimes MUST support the ZIP packaging format for contributions.
+ASM12009=\
+if there is ever a conflict between two indirect dependent contributions, then the conflict MUST be resolved by an explicit entry in the dependent contribution list.
+ASM12010=\ 
+Where present, non-SCA artifact resolution mechanisms MUST be used by the SCA runtime in precendence to the SCA mechanisms.
+ ASM12011=\
+If one of the non-SCA artifact resolution mechanisms is present, but there is a failure to find the resource indicated when using the mechanism (e.g. the URI is incorrect or invalid, say) the SCA runtime MUST raise an error and MUST NOT attempt to use SCA resolution mechanisms as an alternative.
+ASM12012=\
+The value of @autowire for the logical Domain composite MUST be autowire="false".
+ASM12013=\
+For components at the Domain level, with references for which @autowire="true" applies, the behaviour of the SCA runtime for a given Domain MUST take ONE of the 3 following forms:\
+1) The SCA runtime disallows deployment of any components with autowire references. In this case, the SCA runtime MUST raise an exception at the point where the component is deployed.\
+2) The SCA runtime evaluates the target(s) for the reference at the time that the component is deployed and does not update those targets when later deployment actions occur. \
+3) The SCA runtime re-evaluates the target(s) for the reference dynamically as later deployment actions occur resulting in updated reference targets which match the new Domain configuration. How the reconfiguration of the reference takes place is described by the relevant client and implementation specifications.
+ASM12015=\
+Where components are updated by deployment actions (their configuration is changed in some way, which includes changing the wires of component references), the new configuration MUST apply to all new instances of those components once the update is complete.
+ASM12017=\
+Where a component that is the target of a wire is removed, without the wire being changed, then future invocations of the reference that use that wire SHOULD fail with a ServiceUnavailable fault. If the wire is the result of the autowire process, the SCA runtime MUST:\
+* either cause future invocation of the target component's services to fail with a ServiceUnavailable fault\
+* or alternatively, if an alternative target component is available that satisfies the autowire process, update the reference of the source component 
+ASM12020=\
+Where a component is added to the Domain that is a potential target for a domain level component reference where that reference is marked as @autowire=true, the SCA runtime MUST:\
+- either update the references for the source component once the new component is running.  \
+- or alternatively, defer the updating of the references of the source component until the source component is stopped and restarted.
+ASM12021=\
+The SCA runtime MUST raise an error if an artifact cannot be resolved using these mechanisms, if present.
+ASM12022=\
+There can be multiple import declarations for a given namespace.   Where multiple import declarations are made for the same namespace, all the locations specified MUST be searched in lexical order.
+ASM12023=\
+When a contribution contains a reference to an artifact from a namespace that is declared in an import statement of the contribution, if the SCA artifact resolution mechanism is used to resolve the artifact, the SCA runtime MUST resolve artifacts in the following order:\
+1. from the locations identified by the import statement(s) for the namespace. Locations MUST NOT be searched recursively in order to locate artifacts (i.e. only a one-level search is performed).\
+2. from the contents of the contribution itself.
+ASM12024=\
+The SCA runtime MUST ignore local definitions of an artifact if the artifact is found through resolving an import statement.
+ASM12025=\
+The SCA runtime MUST raise an error if an artifact cannot be resolved by using artifact-related or packaging-related artifact resolution mechanisms, if present, by searching locations identified by the import statements of the contribution, if present, and by searching the contents of the contribution.
+ASM12026=\
+An SCA runtime MUST make the <import/> and <export/> elements found in the META-INF/sca-contribution.xml and META-INF/sca-contribution-generated.xml files available for the SCA artifact resolution process.
+ASM12027=\
+An SCA runtime MUST reject files that do not conform to the schema declared in sca-contribution.xsd.
+ASM12028=\
+An SCA runtime MUST merge the contents of sca-contribution-generated.xml into the contents of sca-contribution.xml, with the entries in sca-contribution.xml taking priority if there are any conflicting declarations.
+ASM12031=\
+When a contribution uses an artifact contained in another contribution through SCA artifact resolution, if that artifact itself has dependencies on other artifacts, the SCA runtime MUST resolve these dependencies in the context of the contribution containing the artifact, not in the context of the original contribution.
+ASM14003=\
+Where errors are only detected at runtime, when the error is detected an error MUST be raised to the component that is attempting the activity concerned with the error.
+
+# C.2 Non-mandatory Items
+ASM60021=\
+For the case of an un-wired reference with multiplicity 1..1 or 1..n the deployment process provided by an SCA runtime SHOULD issue a warning.
+ASM12002=\
+Within any contribution packaging A directory resource SHOULD exist at the root of the hierarchy named META-INF
+ASM12003=\
+Within any contribution packaging a document SHOULD exist directly under the META-INF directory named sca-contribution.xml which lists the SCA Composites within the contribution that are runnable.
+ASM12007=\
+Implementations of SCA MAY also raise an error if there are conflicting names exported from multiple contributions.
+ASM12008=\
+An SCA runtime MAY provide the contribution operation functions (install Contribution, update Contribution, add Deployment Composite, update Deployment Composite, remove Contribution).
+ASM12014=\
+Where <wire/> elements are added, removed or replaced by deployment actions, the components whose references are affected by those deployment actions MAY have their references updated by the SCA runtime dynamically without the need to stop and start those components. 
+ASM12016=\
+An SCA runtime MAY choose to maintain existing instances with the old configuration of components updated by deployment actions, but an SCA runtime MAY choose to stop and discard existing instances of those components.
+ASM12018=\
+Where a component that is the target of a wire is updated, future invocations of that reference SHOULD use the updated component. 
+ASM12029=\
+An SCA runtime MAY deploy the composites in <deployable/> elements found in the META-INF/sca-contribution.xml and META-INF/sca-contribution-generated.xml files.
+ASM12030=\
+For XML definitions, which are identified by QNames, the @namespace attribute of the export element SHOULD be the namespace URI for the exported definitions.
+ASM14001=\
+An SCA runtime SHOULD detect errors at deployment time where those errors can be found through static analysis. 
+ASM14002=\
+The SCA runtime SHOULD prevent deployment of contributions that are in error, and raise the error to the process performing the deployment (e.g. write a message to an interactive console or write a message to a log file).
+ASM14004=\
+When an error that could have been detected through static analysis is detected and raised at runtime for a component, the component SHOULD NOT be run until the error is fixed.
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/resources/org/apache/tuscany/sca/assembly/builder/assembly-validation-messages.properties b/sandbox/sebastien/java/vhost/modules/assembly/src/main/resources/org/apache/tuscany/sca/assembly/builder/assembly-validation-messages.properties
new file mode 100644
index 0000000000..91b1721bf7
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/resources/org/apache/tuscany/sca/assembly/builder/assembly-validation-messages.properties
@@ -0,0 +1,85 @@
+#
+#
+#    Licensed to the Apache Software Foundation (ASF) under one
+#    or more contributor license agreements. See the NOTICE file
+#    distributed with this work for additional information
+#    regarding copyright ownership. The ASF licenses this file
+#    to you under the Apache License, Version 2.0 (the
+#    "License"); you may not use this file except in compliance
+#    with the License. You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing,
+#    software distributed under the License is distributed on an
+#    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+#    KIND, either express or implied. See the License for the
+#    specific language governing permissions and limitations
+#    under the License.
+#
+DuplicateComponentName = [ASM50001] Duplicate component name: Composite = {0} Component = {1}
+DuplicateComponentServiceName = Duplicate component service name: Component = {0} Service = {1}
+DuplicateComponentReferenceName = Duplicate component reference name: Component = {0} Reference = {1}
+DuplicateComponentPropertyName = Duplicate component property name: Component = {0} Property = {1}
+NoComponentImplementation = No implementation for component: Component = {0}
+ServiceNotFoundForComponentService = Component type service not found for component service (missing @Remotable annotation?): Component = {0} Service = {1}
+UnresolvedComponentImplementation = [ASM60030,JCI50004,JCI80001] Component implementation not resolved: Component = {0} Uri = {1}
+DuplicateImplementationPropertyName = [ASM40005,ASM60014] Duplicate implementation property name: Component = {0} Property = {1}
+DuplicateImplementationServiceName = [ASM40003,ASM60003,JCA90045] Duplicate implementation service name: Component = {0} Service = {1}
+DuplicateImplementationReferenceName = [ASM40004,ASM50007,ASM60006] Duplicate implementation reference name: Component = {0} Reference = {1}
+PropertyNotFound = [ASM50031] Property not found for component property: Component = {0} Property = {1}
+PropertyMustSupplyIncompatible = Component property mustSupply attribute incompatible with property: Component = {0} Property = {1}
+PropertyMustSupplyNull = [ASM40011,ASM60034] No value configured on a mustSupply property: Component = {0} Property = {1}
+PropertyOverrideManyAttribute = Component property many attribute incompatible with property: Component = {0} Property = {1}
+ReferenceNotFoundForComponentReference = [ASM50008] Component type reference not found for component reference: Component = {0} Reference = {1}
+CompositeReferenceIncompatibleMultiplicity = [ASM60011] Composite reference multiplicity incompatible with component reference multiplicity: Composite = {0} Composite reference = {1} Component reference = {2}
+ReferenceIncompatibleMultiplicity = [ASM50009] Component reference multiplicity incompatible with reference multiplicity: Component = {0} Reference = {1}
+ReferenceIncompatibleInterface = Incompatible interfaces on component reference and target: Composite = {0} Reference = {1} Service = {2}
+ReferencePromotionIncompatibleInterface = Promoted reference interface incompatible with promoting reference: Promoting interface = {0} Promoted = {1}
+ReferencePromotionInterfacesNotEqual = Peer promoted references not equal: First interface = {0} second interface = {1}
+ReferenceIncompatibleComponentInterface = [JCA30001,JCA30002,JCA30003,JCA90046] Component reference interface incompatible with implementation reference interface: Component = {0} Reference = {1} {2}
+ServiceIncompatibleComponentInterface = [ASM50004,JCA30002,JCI80001] Component service interface incompatible with implementation service interface: Component = {0} Service = {1} {2}
+MultipleBindingsForService = Multiple bindings with the same name for a service: Service = {0} Binding name = {1}
+MultipleBindingsForReference = Multiple bindings with the same name for a reference: Reference = {0} Binding name = {1}
+ReferenceWithoutTargets = [ASM60033] No targets for reference: Composite = {0} Reference = {1}
+PromotedReferenceNotFound = [ASM60007] Promoted component reference not found: Composite = {0} Reference = {1}
+PromotedServiceNotFound = [ASM60004,ASM60032] Promoted component service not found: Composite = {0} Service = {1}
+NoSCABindingAvailableForUnresolvedService = A local service cannot be found for reference {0} target {1} and there is no SCA binding available to represent the unresolved target
+NoMatchingBinding = Component reference {0} does not have a binding which matches the bindings of service {1}
+NoMatchingCallbackBinding = Component reference {0} does not have a callback binding which matches the callback bindings of service {1}
+ReferenceEndPointMixWithTarget = [ASM50026] Composite {0} Component {1} Reference {2} must not specify endpoints using both target attribute and with a binding child element
+CompositeAlreadyIncluded = Composite {0} has already been included.
+ComponentReferenceMoreWire = Component reference {0} has more than one wires
+WireTargetNotFound = Wire target not found : {0}
+WireSourceNotFound = Wire source not found : {0}
+WireIncompatibleInterface = Incompatible interfaces on wire source and target : source = {0} target = {1}
+ComponentIncompatibleInterface = Incompatible interfaces on component reference and target : reference = {0} target = {1}
+TooManyReferenceTargets = [ASM50022] Too many targets on reference: {0}
+ReferenceInterfaceNotSubSet = [ASM60008,ASM60013] Interface of composite reference {0} must be compatible with the interface declared by promoted component reference. {1}
+ServiceInterfaceNotSubSet = Interface of composite service {0} must be subset of the interface declared by promoted component service. {1}
+NoComponentReferenceTarget = [ASM60028] No target services found for the component reference to be autowired: {0}
+NoTypeForComponentProperty = No type specified on component property: Component = {0} Property = {1}
+URLSyntaxException = URLSyntaxException when creating binding URI at component = {0} service = {1} binding = {2}
+IllegalCompositeIncusion = Local Composite {0} cannot include a non-local composite {1}
+PropertySourceNotFound = The property source {0} for property {1} in component {2} cannot be resolved to a composite property
+PropertySourceValueInvalid = The property source {0} for property {1} in component {2} has an invalid value. It should start with $ followed by the name of a composite property
+PropertySourceXPathInvalid = The property source {0} for property {1} in component {2} has an invalid XPath expression. The following error was returned while processing the XPath expression: {3}
+PropertyFileValueInvalid = The property file {0} for property {1} in component {2} is an invalid value. The following error was returned while processing the file name: {3}
+PolicyRelatedException = Policy Related Exception occured due to : {0}
+IntentNotFound = Intent {0} is not defined in SCA definitions
+PolicySetNotFound = PolicySet {0} is not defined in SCA definitions
+MutuallyExclusiveIntents = [POL40009,ASM60009,ASM60010] Intent {0} and {1} are mutually exclusive 
+PropertyXpathExpressionReturnedNull = The property XPath expression for component {0} property {1} expression {2} did not match anything in the source property
+PropertyHasManyValues = [ASM50032] The property component {0} property {1} has many values but its "many" attribute is set to false
+PropertXSDTypesDontMatch = [ASM_5036] The property component {0} property {1} has XSD type {2} while its component type property has the XSD type {3}
+PropertXSDElementsDontMatch = [ASM_5036] The property component {0} property {1} has XSD element {2} while its component type property has the XSD element {3}
+IntentNotSatisfied = The intent {0} associated with policy subject {1} has no matching policy set
+URIFoundOnServiceSCABinding = [ASM90005] The SCA binding {0} on component {1} service {2} should not have a URI and the URI is currently set to {3}
+CompositeReferencePromotesNonOverridableReference = [ASM50042] Composite reference promotes component reference with 1..1 multiplicity and nonOverridable flag set true: Composite = {0} Composite reference = {1} Component reference = {2}
+PropertyValueDoesNotMatchSimpleType = [ASM50027] The property {0} on component {1} has a value which does not match the simple type {2} with which it is associated
+PropertyValueDoesNotMatchComplexType = [ASM50038] The property {0} on component {1} has a value which does not match the complex type {2} with which it is associated. Validation reported {3}
+PropertyValueDoesNotMatchElement = [ASM50029] The property {0} on component {1} has a value which does not match the element {2} with which it is associated. Validation reported {3}
+EPRIncompatibleInterface = [BWS20007] The reference interface is incompatible with the interface of the reference binding {0}
+EPIncompatibleInterface = [BWS20007] The service interface is incompatible with the interface of the service binding {0}
+PromotedCallbackReferenceNotFound = For component {0} and service {1} the promoted component {2} does not have a callback reference called {3} which should have been created automatically by Tuscany
+PromotedCallbackServiceNotFound = For component {0} and reference {1} the promoted component {2} does not have a callback service called {3} which should have been created automatically by Tuscany
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/resources/org/apache/tuscany/sca/assembly/builder/assembly-validation-messages_it.properties b/sandbox/sebastien/java/vhost/modules/assembly/src/main/resources/org/apache/tuscany/sca/assembly/builder/assembly-validation-messages_it.properties
new file mode 100644
index 0000000000..b94d37ba2d
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/resources/org/apache/tuscany/sca/assembly/builder/assembly-validation-messages_it.properties
@@ -0,0 +1,30 @@
+#
+#
+#    Licensed to the Apache Software Foundation (ASF) under one
+#    or more contributor license agreements. See the NOTICE file
+#    distributed with this work for additional information
+#    regarding copyright ownership. The ASF licenses this file
+#    to you under the Apache License, Version 2.0 (the
+#    "License"); you may not use this file except in compliance
+#    with the License. You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing,
+#    software distributed under the License is distributed on an
+#    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+#    KIND, either express or implied. See the License for the
+#    specific language governing permissions and limitations
+#    under the License.
+#
+#
+DuplicateComponentName = Nome del componente duplicato: Composite = {0} Component = {1}
+DuplicateComponentServiceName = Nome del servizio del componente duplicato: Component = {0} Service = {1}
+DuplicateComponentReferenceName = Nome del reference del componente duplicato: Component = {0} Reference = {1}
+DuplicateComponentPropertyName = Nome della property del componente duplicato: Component = {0} Property = {1}
+NoComponentImplementation = Implementazione insistente per il componente: Component = {0}
+ServiceNotFoundForComponentService = Servizio non trovato per il componente: Component = {0} Service = {1}
+UnresolvedComponentImplementation = Implementazione del componente non trovata: Component = {0} Uri = {1}
+DuplicateImplementationPropertyName = Nome della property del componente duplicata: Component = {0} Property = {1}
+DuplicateImplementationReferenceName = Nome del riferimento duplicato: Component = {0} Reference = {1}
+PropertyNotFound = Property non trovata per il  componente: Component = {0} Property = {1}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/main/resources/org/apache/tuscany/sca/assembly/builder/definitions-validation-messages.properties b/sandbox/sebastien/java/vhost/modules/assembly/src/main/resources/org/apache/tuscany/sca/assembly/builder/definitions-validation-messages.properties
new file mode 100644
index 0000000000..d3905035b9
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/main/resources/org/apache/tuscany/sca/assembly/builder/definitions-validation-messages.properties
@@ -0,0 +1,25 @@
+#
+#
+#    Licensed to the Apache Software Foundation (ASF) under one
+#    or more contributor license agreements. See the NOTICE file
+#    distributed with this work for additional information
+#    regarding copyright ownership. The ASF licenses this file
+#    to you under the Apache License, Version 2.0 (the
+#    "License"); you may not use this file except in compliance
+#    with the License. You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing,
+#    software distributed under the License is distributed on an
+#    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+#    KIND, either express or implied. See the License for the
+#    specific language governing permissions and limitations
+#    under the License.
+#
+#
+
+DuplicateIntent = [ASM10001,POL30002] Duplicate intent {0} found in domain
+DuplicatePolicysSet = Duplicate policy set {0} found in domain
+DuplicateImplementationType = Duplicate implementation type {0} found in domain
+DuplicateBindingType = [POL40020] Duplicate binding type {0} found in domain
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/test/java/org/apache/tuscany/sca/assembly/AssemblyFactoryTestCase.java b/sandbox/sebastien/java/vhost/modules/assembly/src/test/java/org/apache/tuscany/sca/assembly/AssemblyFactoryTestCase.java
new file mode 100644
index 0000000000..20fd74d46e
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/test/java/org/apache/tuscany/sca/assembly/AssemblyFactoryTestCase.java
@@ -0,0 +1,170 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.sca.assembly;
+
+import javax.xml.namespace.QName;
+
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+/**
+ * Test building of assembly model instances using the assembly factory.
+ * 
+ * @version $Rev$ $Date$
+ */
+public class AssemblyFactoryTestCase {
+
+    private static AssemblyFactory assemblyFactory;
+
+    @BeforeClass
+    public static void setUp() throws Exception {
+        assemblyFactory = new DefaultAssemblyFactory();
+    }
+
+    @Test
+    public void testCreateComponent() {
+        createComponent("AccountServiceComponent1");
+    }
+
+    @Test
+    public void testCreateComponentType() {
+        createComponentType();
+    }
+
+    @Test
+    public void testCreateComposite() {
+        createComposite();
+    }
+
+    /**
+     * Create a composite
+     */
+    Composite createComposite() {
+        Composite c = assemblyFactory.createComposite();
+
+        Component c1 = createComponent("AccountServiceComponent1");
+        c.getComponents().add(c1);
+        Component c2 = createComponent("AccountServiceComponent2");
+        c.getComponents().add(c2);
+
+        Wire w = assemblyFactory.createWire();
+        w.setSource(c1.getReferences().get(0));
+        w.setTarget(c2.getServices().get(0));
+        c.getWires().add(w);
+
+        CompositeService cs = assemblyFactory.createCompositeService();
+        cs.setName("AccountService");
+        cs.setPromotedService(c1.getServices().get(0));
+        cs.setInterfaceContract(new TestInterfaceContract(assemblyFactory));
+        c.getServices().add(cs);
+        cs.getBindings().add(new TestBinding(assemblyFactory));
+
+        CompositeReference cr = assemblyFactory.createCompositeReference();
+        cr.setName("StockQuoteService");
+        cr.getPromotedReferences().add(c2.getReferences().get(1));
+        cr.setInterfaceContract(new TestInterfaceContract(assemblyFactory));
+        c.getReferences().add(cr);
+        cr.getBindings().add(new TestBinding(assemblyFactory));
+
+        return c;
+    }
+
+    /**
+     * Create a new component
+     */
+    Component createComponent(String name) {
+        Component c = assemblyFactory.createComponent();
+        c.setName(name);
+
+        Implementation i = new TestImplementation(assemblyFactory);
+        c.setImplementation(i);
+
+        ComponentProperty p = assemblyFactory.createComponentProperty();
+        p.setName("currency");
+        p.setValue("USD");
+        p.setMustSupply(true);
+        p.setXSDType(new QName("", ""));
+        p.setProperty(i.getProperties().get(0));
+        c.getProperties().add(p);
+
+        ComponentReference ref1 = assemblyFactory.createComponentReference();
+        ref1.setName("accountDataService");
+        ref1.setMultiplicity(Multiplicity.ONE_ONE);
+        ref1.setInterfaceContract(new TestInterfaceContract(assemblyFactory));
+        ref1.setReference(i.getReferences().get(0));
+        c.getReferences().add(ref1);
+        ref1.getBindings().add(new TestBinding(assemblyFactory));
+
+        ComponentReference ref2 = assemblyFactory.createComponentReference();
+        ref2.setName("stockQuoteService");
+        ref2.setMultiplicity(Multiplicity.ONE_ONE);
+        ref2.setInterfaceContract(new TestInterfaceContract(assemblyFactory));
+        ref2.setReference(i.getReferences().get(1));
+        c.getReferences().add(ref2);
+        ref2.getBindings().add(new TestBinding(assemblyFactory));
+
+        ComponentService s = assemblyFactory.createComponentService();
+        s.setName("AccountService");
+        s.setInterfaceContract(new TestInterfaceContract(assemblyFactory));
+        s.setService(i.getServices().get(0));
+        c.getServices().add(s);
+        s.getBindings().add(new TestBinding(assemblyFactory));
+
+        return c;
+    }
+
+    /**
+     * Create a new component type
+     * 
+     * @return
+     */
+    ComponentType createComponentType() {
+        ComponentType ctype = assemblyFactory.createComponentType();
+
+        Property p = assemblyFactory.createProperty();
+        p.setName("currency");
+        p.setValue("USD");
+        p.setMustSupply(true);
+        p.setXSDType(new QName("", ""));
+        ctype.getProperties().add(p);
+
+        Reference ref1 = assemblyFactory.createReference();
+        ref1.setName("accountDataService");
+        ref1.setInterfaceContract(new TestInterfaceContract(assemblyFactory));
+        ref1.setMultiplicity(Multiplicity.ONE_ONE);
+        ctype.getReferences().add(ref1);
+        ref1.getBindings().add(new TestBinding(assemblyFactory));
+
+        Reference ref2 = assemblyFactory.createReference();
+        ref2.setName("stockQuoteService");
+        ref2.setInterfaceContract(new TestInterfaceContract(assemblyFactory));
+        ref2.setMultiplicity(Multiplicity.ONE_ONE);
+        ctype.getReferences().add(ref2);
+        ref2.getBindings().add(new TestBinding(assemblyFactory));
+
+        Service s = assemblyFactory.createService();
+        s.setName("AccountService");
+        s.setInterfaceContract(new TestInterfaceContract(assemblyFactory));
+        ctype.getServices().add(s);
+        s.getBindings().add(new TestBinding(assemblyFactory));
+
+        return ctype;
+    }
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/test/java/org/apache/tuscany/sca/assembly/TestBinding.java b/sandbox/sebastien/java/vhost/modules/assembly/src/test/java/org/apache/tuscany/sca/assembly/TestBinding.java
new file mode 100644
index 0000000000..a09f7af06c
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/test/java/org/apache/tuscany/sca/assembly/TestBinding.java
@@ -0,0 +1,70 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.sca.assembly;
+
+import javax.xml.namespace.QName;
+
+import org.apache.tuscany.sca.assembly.impl.BindingImpl;
+
+/**
+ * A test interface model.
+ *
+ * @version $Rev$ $Date$
+ */
+public class TestBinding extends BindingImpl implements Binding {
+    private final static QName TYPE = new QName("http://test", "binding.test");
+
+    public TestBinding(AssemblyFactory factory) {
+        super(TYPE);
+    }
+
+    public String getName() {
+        return null;
+    }
+
+    public String getURI() {
+        return "http://test";
+    }
+
+    public boolean isUnresolved() {
+        return false;
+    }
+    
+    public WireFormat getRequestWireFormat() {
+        return null;
+    }
+    
+    public void setRequestWireFormat(WireFormat wireFormat) {  
+    }
+    
+    public WireFormat getResponseWireFormat() {
+        return null;
+    }
+    
+    public void setResponseWireFormat(WireFormat wireFormat) {
+    }
+    
+    public OperationSelector getOperationSelector() {
+        return null;
+    }
+    
+    public void setOperationSelector(OperationSelector operationSelector) {
+    }    
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/test/java/org/apache/tuscany/sca/assembly/TestImplementation.java b/sandbox/sebastien/java/vhost/modules/assembly/src/test/java/org/apache/tuscany/sca/assembly/TestImplementation.java
new file mode 100644
index 0000000000..6777c33ff1
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/test/java/org/apache/tuscany/sca/assembly/TestImplementation.java
@@ -0,0 +1,61 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.sca.assembly;
+
+import javax.xml.namespace.QName;
+
+import org.apache.tuscany.sca.assembly.impl.ImplementationImpl;
+
+/**
+ * A test component implementation model.
+ *
+ * @version $Rev$ $Date$
+ */
+public class TestImplementation extends ImplementationImpl implements Implementation {
+    public TestImplementation(AssemblyFactory factory) {
+        super(new QName("http://test", "implementation.test"));
+        Property p = factory.createProperty();
+        p.setName("currency");
+        p.setValue("USD");
+        p.setMustSupply(true);
+        p.setXSDType(new QName("", ""));
+        getProperties().add(p);
+
+        Reference ref1 = factory.createReference();
+        ref1.setName("accountDataService");
+        ref1.setMultiplicity(Multiplicity.ONE_ONE);
+        getReferences().add(ref1);
+        ref1.getBindings().add(new TestBinding(factory));
+
+        Reference ref2 = factory.createReference();
+        ref2.setName("stockQuoteService");
+        ref2.setMultiplicity(Multiplicity.ONE_ONE);
+        ref2.setInterfaceContract(new TestInterfaceContract(factory));
+        getReferences().add(ref2);
+        ref2.getBindings().add(new TestBinding(factory));
+
+        Service s = factory.createService();
+        s.setName("AccountService");
+        s.setInterfaceContract(new TestInterfaceContract(factory));
+        getServices().add(s);
+        s.getBindings().add(new TestBinding(factory));
+
+    }
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/test/java/org/apache/tuscany/sca/assembly/TestInterface.java b/sandbox/sebastien/java/vhost/modules/assembly/src/test/java/org/apache/tuscany/sca/assembly/TestInterface.java
new file mode 100644
index 0000000000..dbe0cb8225
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/test/java/org/apache/tuscany/sca/assembly/TestInterface.java
@@ -0,0 +1,42 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.sca.assembly;
+
+import org.apache.tuscany.sca.interfacedef.Interface;
+import org.apache.tuscany.sca.interfacedef.Operation;
+import org.apache.tuscany.sca.interfacedef.impl.InterfaceImpl;
+
+/**
+ * A test interface model.
+ * 
+ * @version $Rev$ $Date$
+ */
+public class TestInterface extends InterfaceImpl implements Interface {
+
+    public TestInterface(AssemblyFactory factory) {
+
+        setRemotable(true);
+
+        Operation operation = new TestOperation();
+        operation.setName("test");
+        getOperations().add(operation);
+
+    }
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/test/java/org/apache/tuscany/sca/assembly/TestInterfaceContract.java b/sandbox/sebastien/java/vhost/modules/assembly/src/test/java/org/apache/tuscany/sca/assembly/TestInterfaceContract.java
new file mode 100644
index 0000000000..24be8a3e7d
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/test/java/org/apache/tuscany/sca/assembly/TestInterfaceContract.java
@@ -0,0 +1,41 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.sca.assembly;
+
+import org.apache.tuscany.sca.interfacedef.InterfaceContract;
+import org.apache.tuscany.sca.interfacedef.impl.InterfaceContractImpl;
+
+/**
+ * A test interface contract model.
+ * 
+ * @version $Rev$ $Date$
+ */
+public class TestInterfaceContract extends InterfaceContractImpl implements InterfaceContract {
+
+    public TestInterfaceContract(AssemblyFactory factory) {
+
+        TestInterface testInterface = new TestInterface(factory);
+        setInterface(testInterface);
+
+        TestInterface testCallbackInterface = new TestInterface(factory);
+        setCallbackInterface(testCallbackInterface);
+
+    }
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/test/java/org/apache/tuscany/sca/assembly/TestOperation.java b/sandbox/sebastien/java/vhost/modules/assembly/src/test/java/org/apache/tuscany/sca/assembly/TestOperation.java
new file mode 100644
index 0000000000..d94a7e93a3
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/test/java/org/apache/tuscany/sca/assembly/TestOperation.java
@@ -0,0 +1,30 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.sca.assembly;
+
+import org.apache.tuscany.sca.interfacedef.impl.OperationImpl;
+
+/**
+ * A test operation model.
+ * 
+ * @version $Rev$ $Date$
+ */
+public class TestOperation extends OperationImpl {
+
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/test/java/org/apache/tuscany/sca/interfacedef/impl/ContractCompatibilityTestCase.java b/sandbox/sebastien/java/vhost/modules/assembly/src/test/java/org/apache/tuscany/sca/interfacedef/impl/ContractCompatibilityTestCase.java
new file mode 100644
index 0000000000..8d945038bf
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/test/java/org/apache/tuscany/sca/interfacedef/impl/ContractCompatibilityTestCase.java
@@ -0,0 +1,411 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.sca.interfacedef.impl;
+
+import static org.junit.Assert.fail;
+
+import java.lang.reflect.Type;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import org.apache.tuscany.sca.core.DefaultExtensionPointRegistry;
+import org.apache.tuscany.sca.core.ExtensionPointRegistry;
+import org.apache.tuscany.sca.core.UtilityExtensionPoint;
+import org.apache.tuscany.sca.interfacedef.Compatibility;
+import org.apache.tuscany.sca.interfacedef.DataType;
+import org.apache.tuscany.sca.interfacedef.IncompatibleInterfaceContractException;
+import org.apache.tuscany.sca.interfacedef.Interface;
+import org.apache.tuscany.sca.interfacedef.InterfaceContract;
+import org.apache.tuscany.sca.interfacedef.InterfaceContractMapper;
+import org.apache.tuscany.sca.interfacedef.Operation;
+import org.junit.Before;
+import org.junit.Test;
+
+/**
+ * TODO some tests commented out due to DataType.equals() needing to be strict
+ * 
+ * @version $Rev$ $Date$
+ */
+public class ContractCompatibilityTestCase {
+
+    private InterfaceContractMapper mapper;
+    
+    @Before
+    public void setUp() throws Exception {
+        ExtensionPointRegistry extensionPoints = new DefaultExtensionPointRegistry();
+        UtilityExtensionPoint utilities = extensionPoints.getExtensionPoint(UtilityExtensionPoint.class);
+        mapper = utilities.getUtility(InterfaceContractMapper.class);
+    }
+
+    @Test
+    public void testNoOperation() throws Exception {
+        InterfaceContract source = new MockContract("FooContract");
+        InterfaceContract target = new MockContract("FooContract");
+        mapper.checkCompatibility(source, target, Compatibility.SUBSET, false, false);
+    }
+
+    @Test
+    public void testBasic() throws Exception {
+        InterfaceContract source = new MockContract("FooContract");
+        Operation opSource1 = newOperation("op1");
+        Map<String, Operation> sourceOperations = new HashMap<String, Operation>();
+        sourceOperations.put("op1", opSource1);
+        source.getInterface().getOperations().addAll(sourceOperations.values());
+        InterfaceContract target = new MockContract("FooContract");
+        Operation opSource2 = newOperation("op1");
+        Map<String, Operation> targetOperations = new HashMap<String, Operation>();
+        targetOperations.put("op1", opSource2);
+        target.getInterface().getOperations().addAll(targetOperations.values());
+        mapper.checkCompatibility(source, target, Compatibility.SUBSET, false, false);
+    }
+
+    @Test
+    public void testBasicIncompatibleOperationNames() throws Exception {
+        InterfaceContract source = new MockContract("FooContract");
+        Operation opSource1 = newOperation("op1");
+        Map<String, Operation> sourceOperations = new HashMap<String, Operation>();
+        sourceOperations.put("op1", opSource1);
+        source.getInterface().getOperations().addAll(sourceOperations.values());
+        InterfaceContract target = new MockContract("FooContract");
+        Operation opSource2 = newOperation("op2");
+        Map<String, Operation> targetOperations = new HashMap<String, Operation>();
+        targetOperations.put("op2", opSource2);
+        target.getInterface().getOperations().addAll(targetOperations.values());
+        try {
+            mapper.checkCompatibility(source, target, Compatibility.SUBSET, false, false);
+            fail();
+        } catch (IncompatibleInterfaceContractException e) {
+            // expected
+        }
+    }
+
+    @Test
+    public void testInputTypes() throws Exception {
+        InterfaceContract source = new MockContract("FooContract");
+        List<DataType> sourceInputTypes = new ArrayList<DataType>();
+        sourceInputTypes.add(new DataTypeImpl<Type>(Object.class, Object.class));
+        DataType<List<DataType>> inputType = new DataTypeImpl<List<DataType>>(String.class, sourceInputTypes);
+        Operation opSource1 = newOperation("op1");
+        opSource1.setInputType(inputType);
+        Map<String, Operation> sourceOperations = new HashMap<String, Operation>();
+        sourceOperations.put("op1", opSource1);
+        source.getInterface().getOperations().addAll(sourceOperations.values());
+
+        InterfaceContract target = new MockContract("FooContract");
+        List<DataType> targetInputTypes = new ArrayList<DataType>();
+        targetInputTypes.add(new DataTypeImpl<Type>(Object.class, Object.class));
+        DataType<List<DataType>> targetInputType = new DataTypeImpl<List<DataType>>(String.class, targetInputTypes);
+
+        Operation opTarget = newOperation("op1");
+        opTarget.setInputType(targetInputType);
+        Map<String, Operation> targetOperations = new HashMap<String, Operation>();
+        targetOperations.put("op1", opTarget);
+        target.getInterface().getOperations().addAll(targetOperations.values());
+        mapper.checkCompatibility(source, target, Compatibility.SUBSET, false, false);
+    }
+
+    @Test
+    public void testIncompatibleInputTypes() throws Exception {
+        InterfaceContract source = new MockContract("FooContract");
+        List<DataType> sourceInputTypes = new ArrayList<DataType>();
+        sourceInputTypes.add(new DataTypeImpl<Type>(Integer.class, Integer.class));
+        DataType<List<DataType>> inputType = new DataTypeImpl<List<DataType>>(String.class, sourceInputTypes);
+        Operation opSource1 = newOperation("op1");
+        opSource1.setInputType(inputType);
+        Map<String, Operation> sourceOperations = new HashMap<String, Operation>();
+        sourceOperations.put("op1", opSource1);
+        source.getInterface().getOperations().addAll(sourceOperations.values());
+
+        InterfaceContract target = new MockContract("FooContract");
+        List<DataType> targetInputTypes = new ArrayList<DataType>();
+        targetInputTypes.add(new DataTypeImpl<Type>(String.class, String.class));
+        DataType<List<DataType>> targetInputType = new DataTypeImpl<List<DataType>>(String.class, targetInputTypes);
+
+        Operation opTarget = newOperation("op1");
+        opTarget.setInputType(targetInputType);
+        Map<String, Operation> targetOperations = new HashMap<String, Operation>();
+        targetOperations.put("op1", opTarget);
+        target.getInterface().getOperations().addAll(targetOperations.values());
+        try {
+            mapper.checkCompatibility(source, target, Compatibility.SUBSET, false, false);
+            fail();
+        } catch (IncompatibleInterfaceContractException e) {
+            // expected
+        }
+    }
+
+    /**
+     * Verifies source input types can be super types of the target
+     */
+    @Test
+    public void testSourceSuperTypeInputCompatibility() throws Exception {
+        // InterfaceContract source = new MockContract("FooContract");
+        // List<DataType> sourceInputTypes = new ArrayList<DataType>();
+        // sourceInputTypes.add(new DataTypeImpl<Type>(Object.class,
+        // Object.class));
+        // DataType<List<DataType>> inputType = new
+        // DataTypeImpl<List<DataType>>(String.class, sourceInputTypes);
+        // Operation opSource1 = newOperationImpl("op1", inputType, null, null,
+        // false, null);
+        // Map<String, Operation> sourceOperations = new HashMap<String,
+        // Operation>();
+        // sourceOperations.put("op1", opSource1);
+        // source.getInterface().getOperations().addAll(sourceOperations.values());
+        //
+        // InterfaceContract target = new MockContract("FooContract");
+        // List<DataType> targetInputTypes = new ArrayList<DataType>();
+        // targetInputTypes.add(new DataTypeImpl<Type>(String.class,
+        // String.class));
+        // DataType<List<DataType>> targetInputType =
+        // new DataTypeImpl<List<DataType>>(String.class, targetInputTypes);
+        //
+        // Operation opTarget = newOperationImpl("op1", targetInputType, null,
+        // null, false, null);
+        // Map<String, Operation> targetOperations = new HashMap<String,
+        // Operation>();
+        // targetOperations.put("op1", opTarget);
+        // target.getInterface().getOperations().addAll(targetOperations.values());
+        // wireService.checkCompatibility(source, target, false);
+    }
+
+    @Test
+    public void testOutputTypes() throws Exception {
+        InterfaceContract source = new MockContract("FooContract");
+        DataType sourceStringType =  new DataTypeImpl<Type>(String.class, String.class);
+        ArrayList sourceTypes = new ArrayList();
+        sourceTypes.add(sourceStringType);
+        DataType sourceOutputType = new DataTypeImpl(Object[].class, sourceTypes);
+        Operation opSource1 = newOperation("op1");
+        opSource1.setOutputType(sourceOutputType);
+        Map<String, Operation> sourceOperations = new HashMap<String, Operation>();
+        sourceOperations.put("op1", opSource1);
+        source.getInterface().getOperations().addAll(sourceOperations.values());
+
+        InterfaceContract target = new MockContract("FooContract");
+        DataType stringType = new DataTypeImpl<Type>(String.class, String.class);
+        ArrayList types = new ArrayList();
+        types.add(stringType);
+        DataType targetOutputType = new DataTypeImpl(Object[].class, types);
+        Operation opTarget = newOperation("op1");
+        opTarget.setOutputType(targetOutputType);
+        Map<String, Operation> targetOperations = new HashMap<String, Operation>();
+        targetOperations.put("op1", opTarget);
+        target.getInterface().getOperations().addAll(targetOperations.values());
+        mapper.checkCompatibility(source, target, Compatibility.SUBSET, false, false);
+    }
+
+    /**
+     * Verifies a return type that is a supertype of of the target is compatible
+     */
+    @Test
+    public void testSupertypeOutputTypes() throws Exception {
+        // InterfaceContract source = new MockContract("FooContract");
+        // DataType sourceOutputType = new DataTypeImpl<Type>(Object.class,
+        // Object.class);
+        // Operation opSource1 = newOperationImpl("op1", null,
+        // sourceOutputType, null, false, null);
+        // Map<String, Operation> sourceOperations = new HashMap<String,
+        // Operation>();
+        // sourceOperations.put("op1", opSource1);
+        // source.getInterface().getOperations().addAll(sourceOperations.values());
+        //
+        // InterfaceContract target = new MockContract("FooContract");
+        // DataType targetOutputType = new DataTypeImpl<Type>(String.class,
+        // String.class);
+        // Operation opTarget = newOperationImpl("op1", null, targetOutputType,
+        // null, false, null);
+        // Map<String, Operation> targetOperations = new HashMap<String,
+        // Operation>();
+        // targetOperations.put("op1", opTarget);
+        // target.getInterface().getOperations().addAll(targetOperations.values());
+        // wireService.checkCompatibility(source, target, false);
+    }
+
+    @Test
+    public void testIncompatibleOutputTypes() throws Exception {
+        InterfaceContract source = new MockContract("FooContract");
+        DataType sourceType = new DataTypeImpl<Type>(String.class, String.class);
+        ArrayList sourceTypes = new ArrayList();
+        sourceTypes.add(sourceType);
+        DataType sourceOutputType = new DataTypeImpl(Object[].class, sourceTypes);
+        Operation opSource1 = newOperation("op1");
+        opSource1.setOutputType(sourceOutputType);
+        Map<String, Operation> sourceOperations = new HashMap<String, Operation>();
+        sourceOperations.put("op1", opSource1);
+        source.getInterface().getOperations().addAll(sourceOperations.values());
+
+        InterfaceContract target = new MockContract("FooContract");
+        DataType targetType = new DataTypeImpl<Type>(Integer.class, Integer.class);
+        ArrayList targetTypes = new ArrayList();
+        targetTypes.add(targetType);
+        DataType targetOutputType = new DataTypeImpl(Object[].class, targetTypes);
+        Operation opTarget = newOperation("op1");
+        opTarget.setOutputType(targetOutputType);
+        Map<String, Operation> targetOperations = new HashMap<String, Operation>();
+        targetOperations.put("op1", opTarget);
+        target.getInterface().getOperations().addAll(targetOperations.values());
+        try {
+            mapper.checkCompatibility(source, target, Compatibility.SUBSET, false, false);
+            fail();
+        } catch (IncompatibleInterfaceContractException e) {
+            // expected
+        }
+    }
+
+    @Test
+    public void testFaultTypes() throws Exception {
+        InterfaceContract source = new MockContract("FooContract");
+        DataType sourceFaultType = new DataTypeImpl<Type>(String.class, String.class);
+        List<DataType> sourceFaultTypes = new ArrayList<DataType>();
+        sourceFaultTypes.add(0, sourceFaultType);
+        Operation opSource1 = newOperation("op1");
+        opSource1.setFaultTypes(sourceFaultTypes);
+        Map<String, Operation> sourceOperations = new HashMap<String, Operation>();
+        sourceOperations.put("op1", opSource1);
+        source.getInterface().getOperations().addAll(sourceOperations.values());
+
+        InterfaceContract target = new MockContract("FooContract");
+        DataType targetFaultType = new DataTypeImpl<Type>(String.class, String.class);
+        List<DataType> targetFaultTypes = new ArrayList<DataType>();
+        targetFaultTypes.add(0, targetFaultType);
+
+        Operation opTarget = newOperation("op1");
+        opTarget.setFaultTypes(targetFaultTypes);
+        Map<String, Operation> targetOperations = new HashMap<String, Operation>();
+        targetOperations.put("op1", opTarget);
+        target.getInterface().getOperations().addAll(targetOperations.values());
+        mapper.checkCompatibility(source, target, Compatibility.SUBSET, false, false);
+    }
+
+    @Test
+    public void testSourceFaultTargetNoFaultCompatibility() throws Exception {
+        InterfaceContract source = new MockContract("FooContract");
+        DataType sourceFaultType = new DataTypeImpl<Type>(String.class, String.class);
+        List<DataType> sourceFaultTypes = new ArrayList<DataType>();
+        sourceFaultTypes.add(0, sourceFaultType);
+        Operation opSource1 = newOperation("op1");
+        opSource1.setFaultTypes(sourceFaultTypes);
+        Map<String, Operation> sourceOperations = new HashMap<String, Operation>();
+        sourceOperations.put("op1", opSource1);
+        source.getInterface().getOperations().addAll(sourceOperations.values());
+
+        InterfaceContract target = new MockContract("FooContract");
+        Operation opTarget = newOperation("op1");
+        Map<String, Operation> targetOperations = new HashMap<String, Operation>();
+        targetOperations.put("op1", opTarget);
+        target.getInterface().getOperations().addAll(targetOperations.values());
+        mapper.checkCompatibility(source, target, Compatibility.SUBSET, false, false);
+    }
+
+    /**
+     * Verifies a source's fault which is a supertype of the target's fault are
+     * compatible
+     * 
+     * @throws Exception
+     */
+    @Test
+    public void testFaultSuperTypes() throws Exception {
+        // InterfaceContract source = new MockContract("FooContract");
+        // DataType sourceFaultType = new DataTypeImpl<Type>(Exception.class,
+        // Exception.class);
+        // List<DataType> sourceFaultTypes = new ArrayList<DataType>();
+        // sourceFaultTypes.add(0, sourceFaultType);
+        // Operation opSource1 = newOperationImpl("op1", null, null,
+        // sourceFaultTypes, false, null);
+        // Map<String, Operation> sourceOperations = new HashMap<String,
+        // Operation>();
+        // sourceOperations.put("op1", opSource1);
+        // source.getInterface().getOperations().addAll(sourceOperations.values());
+        //
+        // InterfaceContract target = new MockContract("FooContract");
+        // DataType targetFaultType = new
+        // DataTypeImpl<Type>(TuscanyException.class, TuscanyException.class);
+        // List<DataType> targetFaultTypes = new ArrayList<DataType>();
+        // targetFaultTypes.add(0, targetFaultType);
+        //
+        // Operation opTarget = newOperationImpl("op1", null, null,
+        // targetFaultTypes, false, null);
+        // Map<String, Operation> targetOperations = new HashMap<String,
+        // Operation>();
+        // targetOperations.put("op1", opTarget);
+        // target.getInterface().getOperations().addAll(targetOperations.values());
+        // wireService.checkCompatibility(source, target, false);
+    }
+
+    /**
+     * Verifies a source's faults which are supertypes and a superset of the
+     * target's faults are compatible
+     */
+    @Test
+    public void testFaultSuperTypesAndSuperset() throws Exception {
+        // InterfaceContract source = new MockContract("FooContract");
+        // DataType sourceFaultType = new DataTypeImpl<Type>(Exception.class,
+        // Exception.class);
+        // DataType sourceFaultType2 = new
+        // DataTypeImpl<Type>(RuntimeException.class, RuntimeException.class);
+        // List<DataType> sourceFaultTypes = new ArrayList<DataType>();
+        // sourceFaultTypes.add(0, sourceFaultType);
+        // sourceFaultTypes.add(1, sourceFaultType2);
+        // Operation opSource1 = newOperationImpl("op1", null, null,
+        // sourceFaultTypes, false, null);
+        // Map<String, Operation> sourceOperations = new HashMap<String,
+        // Operation>();
+        // sourceOperations.put("op1", opSource1);
+        // source.getInterface().getOperations().addAll(sourceOperations.values());
+        //
+        // InterfaceContract target = new MockContract("FooContract");
+        // DataType targetFaultType = new
+        // DataTypeImpl<Type>(TuscanyException.class, TuscanyException.class);
+        // List<DataType> targetFaultTypes = new ArrayList<DataType>();
+        // targetFaultTypes.add(0, targetFaultType);
+        //
+        // Operation opTarget = newOperationImpl("op1", null, null,
+        // targetFaultTypes, false, null);
+        // Map<String, Operation> targetOperations = new HashMap<String,
+        // Operation>();
+        // targetOperations.put("op1", opTarget);
+        // target.getInterface().getOperations().addAll(targetOperations.values());
+        // wireService.checkCompatibility(source, target, false);
+    }
+
+    private static class MockInterface extends InterfaceImpl {
+
+    }
+
+    private class MockContract<T> extends InterfaceContractImpl {
+        public MockContract() {
+        }
+
+        public MockContract(String interfaceClass) {
+            Interface jInterface = new MockInterface();
+            setInterface(jInterface);
+        }
+    }
+
+    private static Operation newOperation(String name) {
+        Operation operation = new OperationImpl();
+        operation.setName(name);
+        ArrayList<Object> outputTypes = new ArrayList<Object>();
+        outputTypes.add(new DataTypeImpl(Object.class, Object.class));
+        operation.setOutputType(new DataTypeImpl(Object[].class, outputTypes));
+        return operation;
+    }
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/test/java/org/apache/tuscany/sca/interfacedef/impl/InterfaceContractTestCase.java b/sandbox/sebastien/java/vhost/modules/assembly/src/test/java/org/apache/tuscany/sca/interfacedef/impl/InterfaceContractTestCase.java
new file mode 100644
index 0000000000..d1faa5cf2b
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/test/java/org/apache/tuscany/sca/interfacedef/impl/InterfaceContractTestCase.java
@@ -0,0 +1,70 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.interfacedef.impl;
+
+
+import org.apache.tuscany.sca.interfacedef.Interface;
+import org.apache.tuscany.sca.interfacedef.InterfaceContract;
+import org.apache.tuscany.sca.interfacedef.Operation;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+
+/**
+ * @version $Rev$ $Date$
+ */
+public class InterfaceContractTestCase {
+    private InterfaceContract contract;
+    /**
+     * @throws java.lang.Exception
+     */
+    @Before
+    public void setUp() throws Exception {
+        contract = new MockInterfaceContract();
+        Interface i1 = new MockInterface();
+        contract.setInterface(i1);
+        Operation op1 = newOperation("op1");
+        i1.getOperations().add(op1);
+        Interface i2 = new MockInterface();
+        contract.setCallbackInterface(i2);
+        Operation callbackOp1 = newOperation("callbackOp1");
+        i2.getOperations().add(callbackOp1);
+    }
+    
+    @Test
+    public void testClone() throws Exception {
+        InterfaceContract copy = (InterfaceContract) contract.clone();
+        Assert.assertNotNull(copy);
+        Assert.assertNotSame(copy.getCallbackInterface(), contract.getCallbackInterface());
+        Assert.assertNotSame(copy.getInterface(), contract.getInterface());
+    }
+
+    private static class MockInterfaceContract extends InterfaceContractImpl implements InterfaceContract {
+    }
+
+    private static class MockInterface extends InterfaceImpl implements Interface {
+    }
+
+    private static Operation newOperation(String name) {
+        Operation operation = new OperationImpl();
+        operation.setName(name);
+        return operation;
+    }
+}
diff --git a/sandbox/sebastien/java/vhost/modules/assembly/src/test/java/org/apache/tuscany/sca/policy/PolicyFactoryTestCase.java b/sandbox/sebastien/java/vhost/modules/assembly/src/test/java/org/apache/tuscany/sca/policy/PolicyFactoryTestCase.java
new file mode 100644
index 0000000000..569366ad1b
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/modules/assembly/src/test/java/org/apache/tuscany/sca/policy/PolicyFactoryTestCase.java
@@ -0,0 +1,73 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.sca.policy;
+
+import static org.junit.Assert.assertEquals;
+
+import javax.xml.namespace.QName;
+
+import org.junit.Before;
+import org.junit.Test;
+
+/**
+ * Test building of policy model instances using the policy factory.
+ * 
+ * @version $Rev$ $Date$
+ */
+public class PolicyFactoryTestCase {
+
+    PolicyFactory factory;
+
+    @Before
+    public void setUp() throws Exception {
+        factory = new DefaultPolicyFactory();
+    }
+
+    @Test
+    public void testCreateIntent() {
+        Intent intent = factory.createIntent();
+        intent.setName(new QName("http://test", "reliability"));
+        assertEquals(intent.getName(), new QName("http://test", "reliability"));
+    }
+
+    @Test
+    public void testCreatePolicySet() {
+        PolicySet policySet = factory.createPolicySet();
+        policySet.setName(new QName("http://test", "reliability"));
+        assertEquals(policySet.getName(), new QName("http://test", "reliability"));
+    }
+    
+    @Test
+    public void testCreateExternalAttachment() {
+    	ExternalAttachment attachment = factory.createExternalAttachment();    	
+    	attachment.setAttachTo("sca:component");
+    	
+    	Intent intent = factory.createIntent();
+    	intent.setName(new QName("http://test", "reliability"));
+    	attachment.getIntents().add(intent);
+    	
+    	PolicySet policySet = factory.createPolicySet();
+    	policySet.setName(new QName("http://test", "reliability"));
+    	attachment.getPolicySets().add(policySet);
+    	    
+    	assertEquals("sca:component", attachment.getAttachTo());
+    	assertEquals(intent, attachment.getIntents().get(0));
+    	assertEquals(policySet, attachment.getPolicySets().get(0));
+    }
+}