Moving 2.x trunk

git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@882795 13f79535-47bb-0310-9956-ffa450edef68

130 files changed, 12049 insertions, 0 deletions

diff --git a/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/AbstractContract.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/AbstractContract.java
new file mode 100644
index 0000000000..30e2592008
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/AbstractContract.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;
+
+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 $Rev$ $Date$
+ */
+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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/AbstractProperty.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/AbstractProperty.java
new file mode 100644
index 0000000000..fcad39d8cb
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/AbstractProperty.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;
+
+import javax.xml.namespace.QName;
+
+/**
+ * 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);
+
+}
diff --git a/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/AbstractReference.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/AbstractReference.java
new file mode 100644
index 0000000000..a9ef26bbb9
--- /dev/null
+++ b/sca-java-2.x/trunk/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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/AbstractService.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/AbstractService.java
new file mode 100644
index 0000000000..9ae511c07b
--- /dev/null
+++ b/sca-java-2.x/trunk/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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/AssemblyFactory.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/AssemblyFactory.java
new file mode 100644
index 0000000000..7c0f7cf2ce
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/AssemblyFactory.java
@@ -0,0 +1,166 @@
+/*
+ * 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 $Rev$ $Date$
+ */
+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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Base.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Base.java
new file mode 100644
index 0000000000..96dc906395
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Base.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;
+
+/**
+ * Base interface for all assembly model objects.
+ *
+ * @version $Rev$ $Date$
+ */
+public interface Base {
+    String SCA11_NS = "http://docs.oasis-open.org/ns/opencsa/sca/200903";
+    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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Binding.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Binding.java
new file mode 100644
index 0000000000..5c5827637d
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Binding.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;
+
+/**
+ * Represents a binding.
+ *
+ * @version $Rev$ $Date$
+ */
+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
+     */
+    Object clone() throws CloneNotSupportedException;
+
+    QName getType();
+}
diff --git a/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/BindingRRB.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/BindingRRB.java
new file mode 100644
index 0000000000..35e5f148ba
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/BindingRRB.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;
+
+/**
+ * TODO RRB experiment. 
+ * Represents a binding implemented using Request/Response binding chains
+ * Used to test the RRB idea hence no integrated into the Binding interface, yet
+ * 
+ * @version $Rev$ $Date$
+ */
+public interface BindingRRB extends Binding {
+
+    WireFormat getRequestWireFormat();
+
+    void setRequestWireFormat(WireFormat wireFormat);
+
+    WireFormat getResponseWireFormat();
+
+    void setResponseWireFormat(WireFormat wireFormat);
+
+    OperationSelector getOperationSelector();
+
+    void setOperationSelector(OperationSelector operationSelector);
+
+}
diff --git a/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Callback.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Callback.java
new file mode 100644
index 0000000000..d34ec7d01f
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Callback.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;
+
+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();
+
+}
diff --git a/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Component.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Component.java
new file mode 100644
index 0000000000..e2a68e2a4d
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Component.java
@@ -0,0 +1,141 @@
+/*
+ * 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 $Rev$ $Date$
+ */
+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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/ComponentProperty.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/ComponentProperty.java
new file mode 100644
index 0000000000..9a6ae4d35a
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/ComponentProperty.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;
+
+import javax.xml.xpath.XPathExpression;
+
+/**
+ * Represents a configured property of a component.
+ * 
+ * @version $Rev$ $Date$
+ */
+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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/ComponentReference.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/ComponentReference.java
new file mode 100644
index 0000000000..b204b649fe
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/ComponentReference.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;
+
+/**
+ * An instance of a reference associated with a particular component.
+ *
+ * @version $Rev$ $Date$
+ */
+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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/ComponentService.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/ComponentService.java
new file mode 100644
index 0000000000..022d829488
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/ComponentService.java
@@ -0,0 +1,58 @@
+/*
+ * 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 $Rev$ $Date$
+ */
+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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/ComponentType.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/ComponentType.java
new file mode 100644
index 0000000000..2a09b5bc6f
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/ComponentType.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 java.util.List;
+
+import org.apache.tuscany.sca.policy.PolicySubject;
+
+/**
+ * Describes an implementation and represents its configurable aspects.
+ * 
+ * @version $Rev$ $Date$
+ */
+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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Composite.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Composite.java
new file mode 100644
index 0000000000..64a55f1b44
--- /dev/null
+++ b/sca-java-2.x/trunk/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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/CompositeReference.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/CompositeReference.java
new file mode 100644
index 0000000000..88cb2f9a2c
--- /dev/null
+++ b/sca-java-2.x/trunk/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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/CompositeService.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/CompositeService.java
new file mode 100644
index 0000000000..690316aca4
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/CompositeService.java
@@ -0,0 +1,56 @@
+/*
+ * 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 $Rev$ $Date$
+ */
+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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/ConfiguredOperation.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/ConfiguredOperation.java
new file mode 100644
index 0000000000..9c8f6db912
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/ConfiguredOperation.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 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.

+ *

+ * @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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Contract.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Contract.java
new file mode 100644
index 0000000000..731c2986b5
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Contract.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.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 $Rev$ $Date$
+ */
+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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/DefaultAssemblyFactory.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/DefaultAssemblyFactory.java
new file mode 100644
index 0000000000..6d8350fc66
--- /dev/null
+++ b/sca-java-2.x/trunk/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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/DistributedSCABinding.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/DistributedSCABinding.java
new file mode 100644
index 0000000000..5cc43d6333
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/DistributedSCABinding.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 javax.xml.namespace.QName;
+
+/**
+ * Represents an SCA binding used in the distributed runtime.
+ * It provides us with a sensibly named type against which
+ * distributed sca binding providers can be registered
+ *
+ * @version $Rev$ $Date$
+ */
+public interface DistributedSCABinding extends Binding {
+    QName TYPE = SCABinding.TYPE;
+
+    /**
+     * Return the wrapped SCA binding
+     * @return the SCA binding model element
+     */
+    SCABinding getSCABinding();
+
+    /**
+     * Set the wrapped SCA binding
+     * @param scaBinding the SCA binding model element
+     */
+    void setSCABinding(SCABinding scaBinding);
+
+}
diff --git a/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Endpoint.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Endpoint.java
new file mode 100644
index 0000000000..2a26bcb66b
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Endpoint.java
@@ -0,0 +1,137 @@
+/*
+ * 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 $Rev$ $Date$
+ */
+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;
+    
+    /*
+    String getDomainURI();
+    String getNodeURI();
+    void setDomainURI(String domainURI);
+    void setNodeURI(String nodeURI);
+    */
+}
diff --git a/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/EndpointReference.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/EndpointReference.java
new file mode 100644
index 0000000000..793a07d55a
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/EndpointReference.java
@@ -0,0 +1,173 @@
+/*
+ * 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 $Rev$ $Date$
+ */
+public interface EndpointReference extends Base, PolicySubject, Cloneable, Serializable {
+
+    public static final int NOT_CONFIGURED = 0;
+    public static final int RESOLVED_BINDING = 1;
+    public static final int WIRED_TARGET_NOT_FOUND = 2;
+    public static final int WIRED_TARGET_FOUND_READY_FOR_MATCHING = 3;
+    public static final int WIRED_TARGET_FOUND_AND_MATCHED = 4;
+
+    /**
+     * 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);
+
+    /**
+     * Returns true if this endpoint reference refers to an endpoint that 
+     * is not running in this endpoint reference
+     * 
+     * @return true if the endpoint is remote
+     */
+    boolean isRemote();
+
+    /**
+     * Set true if this endpoint reference refers to an endpoint that 
+     * is not running in this endpoint reference
+     * 
+     * @param remote set to true if the endpoint is remote
+     */
+    void setRemote(boolean remote);
+
+    /**
+     * Rather than relying on combinations of unresolved flags and 
+     * other data we maintain a status enumeration
+     * 
+     * @return status
+     */
+    int getStatus();
+
+    /**
+     * Rather than relying on combinations of unresolved flags and 
+     * other data we maintain a status enumeration
+     * 
+     * @param status the new status
+     */
+    void setStatus(int status);
+}
diff --git a/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Extensible.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Extensible.java
new file mode 100644
index 0000000000..9476251305
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Extensible.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;
+
+/**
+ * Base interface for extensible assembly model objects.
+ * 
+ * @version $Rev$ $Date$
+ */
+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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Extension.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Extension.java
new file mode 100644
index 0000000000..4d5b1a2ecd
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Extension.java
@@ -0,0 +1,65 @@
+/*
+ * 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 $Rev$ $Date$
+ */
+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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Implementation.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Implementation.java
new file mode 100644
index 0000000000..2d918a0592
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Implementation.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;
+
+import java.util.List;
+
+import javax.xml.namespace.QName;
+
+import org.apache.tuscany.sca.interfacedef.Operation;
+
+/**
+ * Represents a component implementation.
+ *
+ * @version $Rev$ $Date$
+ */
+public interface Implementation extends ComponentType {
+    QName getType();
+    List<Operation> getOperations();
+}
diff --git a/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Multiplicity.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Multiplicity.java
new file mode 100644
index 0000000000..5d15ce9938
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Multiplicity.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;
+
+/**
+ * Enumeration for multiplicity. Defines the number of wires that can connect a
+ * reference to target services.
+ * 
+ * @version $Rev$ $Date$
+ */
+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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/OperationSelector.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/OperationSelector.java
new file mode 100644
index 0000000000..f72b78cc3a
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/OperationSelector.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 an operationSelector
+ * 
+ * @version $Rev$ $Date$
+ */
+public interface OperationSelector extends Base, Cloneable {
+
+}
diff --git a/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/OperationsConfigurator.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/OperationsConfigurator.java
new file mode 100644
index 0000000000..947fcd4c7c
--- /dev/null
+++ b/sca-java-2.x/trunk/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. 

+ *

+ * @version $Rev$ $Date$

+ */

+

+public interface OperationsConfigurator {

+    List<ConfiguredOperation> getConfiguredOperations();

+}

diff --git a/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/OptimizableBinding.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/OptimizableBinding.java
new file mode 100644
index 0000000000..f997d03786
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/OptimizableBinding.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;
+
+/**
+ * Represent a reference binding that supports optimized SCA local wiring between component 
+ * references and services 
+ * 
+ * @version $Rev$ $Date$
+ * 
+ */
+public interface OptimizableBinding extends Binding, Cloneable {
+
+    /**
+     * @param component
+     */
+    void setTargetComponent(Component component);
+
+    /**
+     * @param service
+     */
+    void setTargetComponentService(ComponentService service);
+
+    /**
+     * @param binding
+     */
+    void setTargetBinding(Binding binding);
+
+    /**
+     * @return
+     */
+    Binding getTargetBinding();
+
+    /**
+     * @return
+     */
+    Component getTargetComponent();
+
+    /**
+     * @return
+     */
+    ComponentService getTargetComponentService();
+
+    /**
+     * Clone the binding
+     * @return
+     */
+    Object clone() throws CloneNotSupportedException;
+
+}
diff --git a/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Property.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Property.java
new file mode 100644
index 0000000000..9d1b3ac20c
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Property.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;
+
+/**
+ * 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 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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Reference.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Reference.java
new file mode 100644
index 0000000000..a20ad4eca6
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Reference.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 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 $Rev$ $Date$
+ */
+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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/SCABinding.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/SCABinding.java
new file mode 100644
index 0000000000..aa356e3857
--- /dev/null
+++ b/sca-java-2.x/trunk/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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/SCABindingFactory.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/SCABindingFactory.java
new file mode 100644
index 0000000000..176770e553
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/SCABindingFactory.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;
+
+/**
+ * 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();
+
+    DistributedSCABinding createDistributedSCABinding();
+
+}
diff --git a/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Service.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Service.java
new file mode 100644
index 0000000000..5069b92a50
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Service.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 java.util.List;
+
+/**
+ * Represents a service. Services are used to publish services provided by
+ * implementations, so that they are addressable by other components.
+ * 
+ * @version $Rev$ $Date$
+ */
+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();
+}
diff --git a/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Wire.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/Wire.java
new file mode 100644
index 0000000000..075b50eec1
--- /dev/null
+++ b/sca-java-2.x/trunk/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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/WireFormat.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/WireFormat.java
new file mode 100644
index 0000000000..fc03bfeb88
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/WireFormat.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 wireFormat.
+ * 
+ * @version $Rev$ $Date$
+ */
+public interface WireFormat extends Base, Cloneable {
+
+}
diff --git a/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/BindingBuilder.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/BindingBuilder.java
new file mode 100644
index 0000000000..973bc987c7
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/BindingBuilder.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.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 $Rev$ $Date$
+ */
+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
+     */
+    void build(Component component, Contract contract, B binding, BuilderContext context);
+
+    /**
+     * Get QName of the binding type
+     * @return The binding type
+     */
+    QName getBindingType();
+
+}
diff --git a/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/BuilderContext.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/BuilderContext.java
new file mode 100644
index 0000000000..7deca4486a
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/BuilderContext.java
@@ -0,0 +1,106 @@
+/*
+ * 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
+ */
+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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/BuilderExtensionPoint.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/BuilderExtensionPoint.java
new file mode 100644
index 0000000000..ae526b92a1
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/BuilderExtensionPoint.java
@@ -0,0 +1,118 @@
+/*
+ * 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.Implementation;
+
+/**
+ * An extension point for Composite builders.
+ *
+ * @version $Rev$ $Date$
+ */
+public interface BuilderExtensionPoint {
+
+    /**
+     * 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);
+}
diff --git a/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/CompositeBuilder.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/CompositeBuilder.java
new file mode 100644
index 0000000000..50bf10f54a
--- /dev/null
+++ b/sca-java-2.x/trunk/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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/CompositeBuilderException.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/CompositeBuilderException.java
new file mode 100644
index 0000000000..5a2015f55e
--- /dev/null
+++ b/sca-java-2.x/trunk/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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/DefaultBuilderExtensionPoint.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/DefaultBuilderExtensionPoint.java
new file mode 100644
index 0000000000..2d0a4b91ee
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/DefaultBuilderExtensionPoint.java
@@ -0,0 +1,400 @@
+/*
+ * 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.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.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 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);
+    }
+
+    /**
+     * 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);
+        }
+
+
+        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 <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) {
+            getBuilder().build(component, contract, binding, context);
+        }
+
+        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;
+        }
+        
+        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);
+        }
+
+    }
+
+}
diff --git a/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/ImplementationBuilder.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/ImplementationBuilder.java
new file mode 100644
index 0000000000..b1e22e195d
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/ImplementationBuilder.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.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 $Rev$ $Date$
+ */
+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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/Messages.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/Messages.java
new file mode 100644
index 0000000000..d40d72ae98
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/Messages.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.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";
+}
diff --git a/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/PolicyBuilder.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/PolicyBuilder.java
new file mode 100644
index 0000000000..56cf1f5590
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/PolicyBuilder.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.assembly.builder;
+
+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 languange to validate the configurations
+ * for SCA endpoints, endpoint references and component implementations
+ */
+public interface PolicyBuilder<T> {
+    /**
+     * Get the policy type
+     * @return
+     */
+    QName getPolicyType();
+
+    /**
+     * 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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/WireBuilder.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/WireBuilder.java
new file mode 100644
index 0000000000..2bfbe85664
--- /dev/null
+++ b/sca-java-2.x/trunk/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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/AbstractPropertyImpl.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/AbstractPropertyImpl.java
new file mode 100644
index 0000000000..49995f5ab8
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/AbstractPropertyImpl.java
@@ -0,0 +1,93 @@
+/*
+ * 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;
+
+/**
+ * Represents an abstract property.
+ * 
+ * @version $Rev$ $Date$
+ */
+public class AbstractPropertyImpl extends ExtensibleImpl implements AbstractProperty {
+    private Object value;
+    private String name;
+    private QName xsdType;
+    private QName xsdElement;
+    private boolean many;
+    private boolean mustSupply;
+
+    /**
+     * 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;
+    }
+
+}
diff --git a/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/AbstractReferenceImpl.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/AbstractReferenceImpl.java
new file mode 100644
index 0000000000..3e44f5f7ae
--- /dev/null
+++ b/sca-java-2.x/trunk/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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/AbstractServiceImpl.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/AbstractServiceImpl.java
new file mode 100644
index 0000000000..24b1a0e03e
--- /dev/null
+++ b/sca-java-2.x/trunk/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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/AssemblyFactoryImpl.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/AssemblyFactoryImpl.java
new file mode 100644
index 0000000000..0759ff1361
--- /dev/null
+++ b/sca-java-2.x/trunk/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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/BaseImpl.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/BaseImpl.java
new file mode 100644
index 0000000000..516b11724f
--- /dev/null
+++ b/sca-java-2.x/trunk/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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/BindingImpl.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/BindingImpl.java
new file mode 100644
index 0000000000..552d67fec6
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/BindingImpl.java
@@ -0,0 +1,99 @@
+/*
+ * 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.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 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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/CallbackImpl.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/CallbackImpl.java
new file mode 100644
index 0000000000..dcd6c7b08a
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/CallbackImpl.java
@@ -0,0 +1,67 @@
+/*
+ * 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.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>();
+
+    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;
+    }
+
+}
diff --git a/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ComponentImpl.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ComponentImpl.java
new file mode 100644
index 0000000000..8a03df339c
--- /dev/null
+++ b/sca-java-2.x/trunk/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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ComponentPropertyImpl.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ComponentPropertyImpl.java
new file mode 100644
index 0000000000..9db522930f
--- /dev/null
+++ b/sca-java-2.x/trunk/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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ComponentReferenceImpl.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ComponentReferenceImpl.java
new file mode 100644
index 0000000000..78b54668b3
--- /dev/null
+++ b/sca-java-2.x/trunk/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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ComponentServiceImpl.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ComponentServiceImpl.java
new file mode 100644
index 0000000000..f8c9f53413
--- /dev/null
+++ b/sca-java-2.x/trunk/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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ComponentTypeImpl.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ComponentTypeImpl.java
new file mode 100644
index 0000000000..f18c852e69
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ComponentTypeImpl.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.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;
+    }  
+
+    @Override
+    public int hashCode() {
+        return String.valueOf(getURI()).hashCode();
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (obj == this) {
+            return true;
+        } else {
+            if (obj instanceof ComponentType) {
+                if (getURI() != null) {
+                    return getURI().equals(((ComponentType)obj).getURI());
+                } else {
+                    return ((ComponentType)obj).getURI() == null;
+                }
+            } else {
+                return false;
+            }
+        }
+    }
+
+    public List<Intent> getRequiredIntents() {
+        return requiredIntents;
+    }
+
+    public List<PolicySet> getPolicySets() {
+        return policySets;
+    }
+
+    public ExtensionType getExtensionType() {
+        return null;
+    }
+
+    public void setExtensionType(ExtensionType type) {
+    }
+}
diff --git a/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/CompositeImpl.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/CompositeImpl.java
new file mode 100644
index 0000000000..fba6af7e7f
--- /dev/null
+++ b/sca-java-2.x/trunk/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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/CompositeReferenceImpl.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/CompositeReferenceImpl.java
new file mode 100644
index 0000000000..ae5fad461b
--- /dev/null
+++ b/sca-java-2.x/trunk/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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/CompositeServiceImpl.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/CompositeServiceImpl.java
new file mode 100644
index 0000000000..55b48ec578
--- /dev/null
+++ b/sca-java-2.x/trunk/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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ConfiguredOperationImpl.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ConfiguredOperationImpl.java
new file mode 100644
index 0000000000..32377faf54
--- /dev/null
+++ b/sca-java-2.x/trunk/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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ContractImpl.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ContractImpl.java
new file mode 100644
index 0000000000..2b72f1f047
--- /dev/null
+++ b/sca-java-2.x/trunk/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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/DistributedSCABindingImpl.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/DistributedSCABindingImpl.java
new file mode 100644
index 0000000000..99d68a11bc
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/DistributedSCABindingImpl.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.assembly.impl;
+
+import javax.xml.namespace.QName;
+
+import org.apache.tuscany.sca.assembly.DistributedSCABinding;
+import org.apache.tuscany.sca.assembly.SCABinding;
+
+/**
+ * The Distributed SCA binding wrapper for the SCA binding model object. This is currently
+ * just used to locate the remote binding extension and pass the SCA binding to the remote
+ * extension. It isn't used in the model itself
+ *
+ * @version $Rev$ $Date$
+ */
+public class DistributedSCABindingImpl implements DistributedSCABinding {
+
+    private SCABinding scaBinding;
+
+    public SCABinding getSCABinding() {
+        return scaBinding;
+    }
+
+    public void setSCABinding(SCABinding scaBinding) {
+        this.scaBinding = scaBinding;
+    }
+
+    public String getURI() {
+        return null;
+    }
+
+    public void setURI(String uri) {
+    }
+
+    public String getName() {
+        return null;
+    }
+
+    public void setName(String name) {
+
+    }
+
+    public boolean isUnresolved() {
+        return false;
+    }
+
+    public void setUnresolved(boolean unresolved) {
+
+    }
+
+    @Override
+    public Object clone() throws CloneNotSupportedException {
+        return super.clone();
+    }
+
+    public QName getType() {
+        return TYPE;
+    }
+}
diff --git a/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/EndpointImpl.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/EndpointImpl.java
new file mode 100644
index 0000000000..d518230a92
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/EndpointImpl.java
@@ -0,0 +1,206 @@
+/*
+ * 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.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 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;
+    }
+}
diff --git a/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/EndpointReferenceImpl.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/EndpointReferenceImpl.java
new file mode 100644
index 0000000000..b39e27683d
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/EndpointReferenceImpl.java
@@ -0,0 +1,254 @@
+/*
+ * 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.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 ExtensionPointRegistry registry;
+    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 boolean remote = false;
+    protected int status;
+
+    // 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() {
+        String output = "EndpointReference: ";
+
+        if (getURI() != null) {
+            output += " URI = " + getURI();
+        }
+
+        switch (status) {
+            case 0:
+                output += " NOT_CONFIGURED ";
+                break;
+            case 1:
+                output += " RESOLVED_BINDING ";
+                break;
+            case 2:
+                output += " WIRED_TARGET_NOT_FOUND ";
+                break;
+            case 3:
+                output += " WIRED_TARGET_FOUND_READY_FOR_MATCHING ";
+                break;
+            case 4:
+                output += " WIRED_TARGET_FOUND_AND_MATCHED ";
+                break;
+        }
+
+        if (targetEndpoint != null) {
+            output += " Target = " + targetEndpoint.toString();
+        }
+
+        return output;
+    }
+
+    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;
+    }
+
+    public boolean isRemote() {
+        return remote;
+    }
+
+    public void setRemote(boolean remote) {
+        this.remote = remote;
+    }
+
+    protected void resolve() {
+    }
+
+    protected void reset() {
+        this.uri = null;
+    }
+
+    public void setExtensionPointRegistry(ExtensionPointRegistry registry) {
+        this.registry = registry;
+    }
+
+    public int getStatus() {
+        return status;
+    }
+
+    public void setStatus(int status) {
+        this.status = status;
+    }
+}
diff --git a/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ExtensibleImpl.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ExtensibleImpl.java
new file mode 100644
index 0000000000..340fa2854c
--- /dev/null
+++ b/sca-java-2.x/trunk/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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ExtensionImpl.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ExtensionImpl.java
new file mode 100644
index 0000000000..b5018c4d43
--- /dev/null
+++ b/sca-java-2.x/trunk/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;
+    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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ImplementationImpl.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ImplementationImpl.java
new file mode 100644
index 0000000000..20c7ea3206
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ImplementationImpl.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.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 $Rev$ $Date$
+ */
+public abstract class ImplementationImpl extends ComponentTypeImpl implements Implementation, PolicySubject {
+    private QName type;
+    private ExtensionType extensionType;
+    private 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;
+    }
+}
diff --git a/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/PropertyImpl.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/PropertyImpl.java
new file mode 100644
index 0000000000..263af296b1
--- /dev/null
+++ b/sca-java-2.x/trunk/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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ReferenceImpl.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ReferenceImpl.java
new file mode 100644
index 0000000000..69d76f238d
--- /dev/null
+++ b/sca-java-2.x/trunk/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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/SCABindingFactoryImpl.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/SCABindingFactoryImpl.java
new file mode 100644
index 0000000000..cf7e744e88
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/SCABindingFactoryImpl.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.DistributedSCABinding;
+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();
+    }
+
+    public DistributedSCABinding createDistributedSCABinding() {
+        return new DistributedSCABindingImpl();
+    }
+
+}
diff --git a/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/SCABindingImpl.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/SCABindingImpl.java
new file mode 100644
index 0000000000..b67dbcbb12
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/SCABindingImpl.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.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.Component;
+import org.apache.tuscany.sca.assembly.ComponentService;
+import org.apache.tuscany.sca.assembly.Extensible;
+import org.apache.tuscany.sca.assembly.Extension;
+import org.apache.tuscany.sca.assembly.OptimizableBinding;
+import org.apache.tuscany.sca.assembly.SCABinding;
+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, OptimizableBinding {
+    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;
+
+    private Component targetComponent;
+    private ComponentService targetComponentService;
+    private Binding targetBinding;
+    private List<PolicySet> applicablePolicySets = new ArrayList<PolicySet>();
+
+    public List<PolicySet> getApplicablePolicySets() {
+        return applicablePolicySets;
+    }
+
+    /**
+     * 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() {
+        if (targetComponentService == null) {
+            return true;
+        } else {
+            return targetComponentService.isUnresolved();
+        }
+    }
+
+    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;
+    }
+
+    // Wireable binding operations
+
+    public Component getTargetComponent() {
+        return targetComponent;
+    }
+
+    public void setTargetComponent(Component targetComponent) {
+        this.targetComponent = targetComponent;
+    }
+
+    public ComponentService getTargetComponentService() {
+        return targetComponentService;
+    }
+
+    public void setTargetComponentService(ComponentService targetComponentService) {
+        this.targetComponentService = targetComponentService;
+    }
+
+    public Binding getTargetBinding() {
+        return targetBinding;
+    }
+
+    public void setTargetBinding(Binding targetBinding) {
+        this.targetBinding = targetBinding;
+    }
+
+    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;
+    }
+}
diff --git a/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ServiceImpl.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ServiceImpl.java
new file mode 100644
index 0000000000..62523e5c17
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/ServiceImpl.java
@@ -0,0 +1,106 @@
+/*
+ * 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>();
+
+    /**
+     * 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;
+    }
+}
diff --git a/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/WireImpl.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/impl/WireImpl.java
new file mode 100644
index 0000000000..a4990f6a98
--- /dev/null
+++ b/sca-java-2.x/trunk/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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/definitions/DefaultDefinitionsFactory.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/definitions/DefaultDefinitionsFactory.java
new file mode 100644
index 0000000000..156fd0af75
--- /dev/null
+++ b/sca-java-2.x/trunk/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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/definitions/Definitions.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/definitions/Definitions.java
new file mode 100644
index 0000000000..7a63bbedc5
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/definitions/Definitions.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.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;
+
+
+/**
+ * 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();
+}
diff --git a/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/definitions/DefinitionsBuilder.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/definitions/DefinitionsBuilder.java
new file mode 100644
index 0000000000..5c68c6cbff
--- /dev/null
+++ b/sca-java-2.x/trunk/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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/definitions/DefinitionsBuilderException.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/definitions/DefinitionsBuilderException.java
new file mode 100644
index 0000000000..f45be80888
--- /dev/null
+++ b/sca-java-2.x/trunk/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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/definitions/DefinitionsFactory.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/definitions/DefinitionsFactory.java
new file mode 100644
index 0000000000..616616ae7a
--- /dev/null
+++ b/sca-java-2.x/trunk/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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/definitions/impl/DefinitionsBuilderImpl.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/definitions/impl/DefinitionsBuilderImpl.java
new file mode 100644
index 0000000000..d87d45b27a
--- /dev/null
+++ b/sca-java-2.x/trunk/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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/definitions/impl/DefinitionsImpl.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/definitions/impl/DefinitionsImpl.java
new file mode 100644
index 0000000000..224bc0a69a
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/definitions/impl/DefinitionsImpl.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.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.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>();
+
+   
+    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;
+    }
+}
diff --git a/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/definitions/util/DefinitionsUtil.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/definitions/util/DefinitionsUtil.java
new file mode 100644
index 0000000000..eb74677236
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/definitions/util/DefinitionsUtil.java
@@ -0,0 +1,108 @@
+/*
+ * 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());
+    }
+    
+}
diff --git a/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/ConversationSequence.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/ConversationSequence.java
new file mode 100644
index 0000000000..247a432330
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/ConversationSequence.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;
+
+/**
+ * Enum of the Conversation Sequence values.
+ *
+ * @version $Rev$ $Date$
+ */
+public enum ConversationSequence {
+    CONVERSATION_NONE, CONVERSATION_START, CONVERSATION_CONTINUE, CONVERSATION_END 
+}
diff --git a/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/DataType.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/DataType.java
new file mode 100644
index 0000000000..1f5620c0b9
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/DataType.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.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 semantially 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 $Rev$ $Date$
+ */
+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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/FaultExceptionMapper.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/FaultExceptionMapper.java
new file mode 100644
index 0000000000..70f6d5b403
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/FaultExceptionMapper.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.interfacedef;
+
+/**
+ * This interface represents the mapping between WSDL faults and Java exceptions
+ * 
+ * @version $Rev$ $Date$
+ */
+@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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/IncompatibleInterfaceContractException.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/IncompatibleInterfaceContractException.java
new file mode 100644
index 0000000000..179dc1755e
--- /dev/null
+++ b/sca-java-2.x/trunk/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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/Interface.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/Interface.java
new file mode 100644
index 0000000000..cab7057b57
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/Interface.java
@@ -0,0 +1,128 @@
+/*
+ * 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 $Rev$ $Date$
+ */
+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();
+
+    // FIXME: [rfeng] We need to re-consider the conversational as an intent
+    /**
+     * Test if the interface is conversational
+     * @return
+     */
+    boolean isConversational();
+
+    /**
+     * Set whether the interface is conversational
+     * @param conversational
+     */
+    void setConversational(boolean conversational);
+
+    /**
+     * 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 assoicated with the interface
+     * @return A map of attributes
+     */
+    Map<Object, Object> getAttributes();
+
+    /**
+     * Implementations must support cloning.
+     */
+    Object clone() throws CloneNotSupportedException;
+
+}
diff --git a/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/InterfaceContract.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/InterfaceContract.java
new file mode 100644
index 0000000000..568a6c595c
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/InterfaceContract.java
@@ -0,0 +1,81 @@
+/*
+ * 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 $Rev$ $Date$
+ */
+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;
+
+}
diff --git a/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/InterfaceContractMapper.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/InterfaceContractMapper.java
new file mode 100644
index 0000000000..8dfeb29833
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/InterfaceContractMapper.java
@@ -0,0 +1,139 @@
+/*
+ * 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;
+
+/**
+ * The InterfaceContractMapper is responsible to match interfaces
+ * 
+ * @version $Rev$ $Date$
+ */
+public interface InterfaceContractMapper {
+    /**
+     * Check the compatibility of the source and the target interface contracts.
+     * <p>
+     * A wire may only connect a source to a target if the target implements an
+     * interface that is compatible with the interface required by the source.
+     * The source and the target are compatible if: <p/>
+     * <ol>
+     * <li>the source interface and the target interface MUST either both be
+     * remotable or they are both local
+     * <li>the methods on the target interface MUST be the same as or be a
+     * superset of the methods in the interface specified on the source
+     * <li>compatibility for the individual method is defined as compatibility
+     * of the signature, that is method name, input types, and output types MUST
+     * BE the same.
+     * <li>the order of the input and output types also MUST BE the same.
+     * <li>the set of Faults and Exceptions expected by the source MUST BE the
+     * same or be a superset of those specified by the service.
+     * <li>other specified attributes of the two interfaces MUST match,
+     * including Scope and Callback interface
+     * </ol>
+     * <p/>
+     * <p>
+     * This relationship implies that the source contract is a subset of the target
+     * contract - ie all the operations of the source must be present in the target, but
+     * the target can in principle contain additional operations not present in the 
+     * source
+     * </p>
+     * <p>
+     * Please note this test is not symmetric: the success of isCompatible(A, B)
+     * does NOT imply isCompatible(B, A)
+     * 
+     * @param source The source interface contract
+     * @param target The target interface contract
+     * @return true if the source contract can be supported by the target
+     *         contract
+     */
+    boolean isCompatible(InterfaceContract source, InterfaceContract target);
+    
+    /**
+     * 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. 
+     * @param source - the source contract
+     * @param target - the target contract
+     * @return
+     */
+    boolean isEqual(InterfaceContract source, InterfaceContract target);
+
+    /**
+     * 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 an interface
+     * @param target a second interface
+     * @return true if the two interfaces are equal, otherwise return false
+     */
+    public boolean isEqual(Interface source, Interface target);
+    
+    /**
+     * @param source
+     * @param target
+     * @param ignoreCallback
+     * @param silent
+     * @return
+     * @throws IncompatibleInterfaceContractException
+     */
+    boolean checkCompatibility(InterfaceContract source,
+                               InterfaceContract target,
+                               boolean ignoreCallback,
+                               boolean silent) 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
+     * @return
+     */
+    boolean isCompatible(DataType<?> source, DataType<?> target, boolean remotable);
+
+    /**
+     * Check if source operation is compatible with the target operation
+     * 
+     * @param source The source operation
+     * @param target The target operation
+     * @return true if the source operation is compatible with the target
+     *         operation
+     */
+    boolean isCompatible(Operation source, Operation target, boolean remotable);
+
+    /**
+     * @param source
+     * @param target
+     * @return
+     */
+    boolean isCompatible(Interface source, Interface 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
+     */
+    Operation map(Interface target, Operation source);
+}
diff --git a/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/InvalidAnnotationException.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/InvalidAnnotationException.java
new file mode 100644
index 0000000000..b24872bf96
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/InvalidAnnotationException.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.interfacedef;
+
+
+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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/InvalidCallbackException.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/InvalidCallbackException.java
new file mode 100644
index 0000000000..f952a86478
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/InvalidCallbackException.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.interfacedef;
+
+
+/**
+ * Denotes an illegal callback interface
+ *
+ * @version $Rev$ $Date$
+ */
+
+public class InvalidCallbackException extends InvalidInterfaceException {
+    private static final long serialVersionUID = 2727755895702116397L;
+
+    public InvalidCallbackException(String message) {
+        super(message);
+    }
+}
diff --git a/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/InvalidInterfaceException.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/InvalidInterfaceException.java
new file mode 100644
index 0000000000..31b9ee092d
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/InvalidInterfaceException.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.interfacedef;
+
+/**
+ * @version $Rev$ $Date$
+ */
+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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/InvalidOperationException.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/InvalidOperationException.java
new file mode 100644
index 0000000000..b19805c5b1
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/InvalidOperationException.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.interfacedef;
+
+import java.lang.reflect.Method;
+
+/**
+ * Denotes an invalid conversational interface definition
+ * 
+ * @version $Rev$ $Date$
+ */
+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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/Operation.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/Operation.java
new file mode 100644
index 0000000000..55f00b82c8
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/Operation.java
@@ -0,0 +1,209 @@
+/*
+ * 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 $Rev$ $Date$
+ */
+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 getOutputType();
+
+    /**
+     * @param outputType
+     */
+    void setOutputType(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);
+
+    /**
+     * Get the sequence of the conversation
+     * @return
+     */
+    ConversationSequence getConversationSequence();
+
+    /**
+     * Set the sequence of conversation for the operation
+     * @param sequence
+     */
+    void setConversationSequence(ConversationSequence sequence);
+
+    /**
+     * Indicate if the operation is non-blocking
+     * @return
+     */
+    boolean isNonBlocking();
+
+    /**
+     * 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;
+
+}
diff --git a/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/OverloadedOperationException.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/OverloadedOperationException.java
new file mode 100644
index 0000000000..6773b29088
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/OverloadedOperationException.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;
+
+import java.lang.reflect.Method;
+
+/**
+ * Exception thrown to indicate that a service contract specification contains
+ * an overloaded method.
+ * 
+ * @version $Rev$ $Date$
+ */
+public class OverloadedOperationException extends InvalidInterfaceException {
+    private static final long serialVersionUID = -4658711318608885638L;
+    private final Method operation;
+
+    public OverloadedOperationException(Method operation) {
+        super(operation == null ? 
+                null : "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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/impl/DataTypeImpl.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/impl/DataTypeImpl.java
new file mode 100644
index 0000000000..c1c8400b71
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/impl/DataTypeImpl.java
@@ -0,0 +1,219 @@
+/*
+ * 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 semantially 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 $Rev$ $Date$
+ */
+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() {
+        StringBuffer sb = new StringBuffer();
+        sb.append(physical).append(" ").append(dataBinding).append(" ").append(logical);
+        return sb.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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/impl/InterfaceContractImpl.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/impl/InterfaceContractImpl.java
new file mode 100644
index 0000000000..15581b5e04
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/impl/InterfaceContractImpl.java
@@ -0,0 +1,128 @@
+/*
+ * 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 $Rev$ $Date$
+ */
+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;
+    }
+
+}
diff --git a/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/impl/InterfaceContractMapperImpl.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/impl/InterfaceContractMapperImpl.java
new file mode 100644
index 0000000000..03a39bc840
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/impl/InterfaceContractMapperImpl.java
@@ -0,0 +1,391 @@
+/*
+ * 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.List;
+
+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;
+
+/**
+ * @version $Rev$ $Date$
+ */
+public class InterfaceContractMapperImpl implements InterfaceContractMapper {
+
+    public boolean isCompatible(DataType source, DataType target, boolean remotable) {
+        if (source == target) {
+            return true;
+        }
+        if (!remotable) {
+            if (source == null || target == null) {
+                return false;
+            }
+            // For local case
+            return target.getPhysical().isAssignableFrom(source.getPhysical());
+        } else {
+            // FIXME: How to test if two remotable data type is compatible?
+            // return target.getLogical().equals(source.getLogical());
+            return true;
+        }
+
+    }
+    
+
+    /**
+     * 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 isEqual(InterfaceContract source, InterfaceContract target) {
+    	// Are the forward interfaces equal?
+    	if( isEqual( source.getInterface(), target.getInterface()) ) {
+    		// Is there a Callback interface?
+    		if( source.getCallbackInterface() == null && target.getCallbackInterface() == null ) {
+    			return true;
+    		} else {
+    			if( isEqual( 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 isEqual(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.isConversational() != target.isConversational()) {
+            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, source.isRemotable())) {
+                return false;
+            }
+        }
+        return true;
+    } // end method isEqual
+
+    public boolean isCompatible(Operation source, Operation target, boolean remotable) {
+        if (source == target) {
+            return true;
+        }
+
+        if (source.isDynamic() || target.isDynamic()) {
+            return true;
+        }
+
+        // Check name
+        if (!source.getName().equals(target.getName())) {
+            return false;
+        }
+
+        if (source.getInterface().isRemotable() != target.getInterface().isRemotable()) {
+            return false;
+        }
+
+        //        if (source.getInterface().isRemotable()) {
+        //            return true;
+        //        }
+
+        // FIXME: We need to deal with wrapped<-->unwrapped conversion
+
+        // Check output type
+        DataType<?> sourceOutputType = source.getOutputType();
+        DataType<?> targetOutputType = target.getOutputType();
+
+        boolean checkSourceWrapper = true;
+        List<DataType> sourceInputType = source.getInputType().getLogical();
+        if (source.isWrapperStyle() && source.getWrapper() != null) {
+            sourceInputType = source.getWrapper().getUnwrappedInputType().getLogical();
+            sourceOutputType = 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 = target.getWrapper().getUnwrappedOutputType();
+            checkTargetWrapper = false;
+        }
+
+        if (checkSourceWrapper != checkTargetWrapper) {
+            return true;
+        }
+
+        if (!isCompatible(targetOutputType, sourceOutputType, remotable)) {
+            return false;
+        }
+
+        if (sourceInputType.size() != targetInputType.size()) {
+            return false;
+        }
+
+        int size = sourceInputType.size();
+        for (int i = 0; i < size; i++) {
+            if (!isCompatible(sourceInputType.get(i), targetInputType.get(i), remotable)) {
+                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, remotable)) {
+                    // Target fault type can be covered by the source fault type
+                    found = true;
+                    break;
+                }
+            }
+            if (!found) {
+                return false;
+            }
+        }
+
+        return 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;
+    }
+
+    public boolean checkCompatibility(InterfaceContract source,
+                                      InterfaceContract target,
+                                      boolean ignoreCallback,
+                                      boolean silent) 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) {
+                throw new IncompatibleInterfaceContractException("Remotable settings do not match", source, target);
+            } else {
+                return false;
+            }
+        }
+        if (source.getInterface().isConversational() != target.getInterface().isConversational()) {
+            if (!silent) {
+                throw new IncompatibleInterfaceContractException("Interaction scopes 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) {
+                    throw new IncompatibleInterfaceContractException("Operation not found on target", source, target);
+                } else {
+                    return false;
+                }
+            }
+            if (!source.getInterface().isRemotable()) {
+                // FIXME: for remotable operation, only compare name for now
+                if (!isCompatible(operation, targetOperation, false)) {
+                    if (!silent) {
+                        throw new IncompatibleInterfaceContractException("Target operations are not compatible",
+                                                                         source, target);
+                    } else {
+                        return false;
+                    }
+                }
+            }
+        }
+
+        return ignoreCallback || isCallbackCompatible(source, target, silent);
+    }
+
+
+    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", source, target);
+            } else {
+                return false;
+            }
+        }
+
+        if (source.getCallbackInterface().isConversational() != target.getCallbackInterface().isConversational()) {
+            if (!silent) {
+                throw new IncompatibleInterfaceContractException("Interaction scopes do not match", 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 isCompatible(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;
+        }
+        if (source.isConversational() != target.isConversational()) {
+            return false;
+        }
+
+        for (Operation operation : source.getOperations()) {
+            Operation targetOperation = getOperation(target.getOperations(), operation.getName());
+            if (targetOperation == null) {
+                return false;
+            }
+            if (!isCompatible(operation, targetOperation, source.isRemotable())) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    public boolean isCompatible(InterfaceContract source, InterfaceContract target) {
+        try {
+            return checkCompatibility(source, target, 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, target.isRemotable())) {
+                    return op;
+                }
+            }
+            return null;
+        }
+
+    }
+
+}
diff --git a/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/impl/InterfaceImpl.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/impl/InterfaceImpl.java
new file mode 100644
index 0000000000..08f859fc8a
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/impl/InterfaceImpl.java
@@ -0,0 +1,328 @@
+/*
+ * 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 $Rev$ $Date$
+ */
+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);
+                }
+            }
+            DataType outputType = op.getOutputType();
+            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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/impl/OperationImpl.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/impl/OperationImpl.java
new file mode 100644
index 0000000000..26144e92cb
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/impl/OperationImpl.java
@@ -0,0 +1,284 @@
+/*
+ * 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.ConversationSequence;
+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.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 $Rev$ $Date$
+ */
+public class OperationImpl implements Operation {
+
+    private String name;
+    private boolean unresolved;
+    private DataType outputType;
+    private DataType<List<DataType>> inputType;
+    private List<DataType> faultTypes;
+    private Interface interfaze;
+    private ConversationSequence conversationSequence = ConversationSequence.CONVERSATION_NONE;
+    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;
+
+    /**
+     * @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 getOutputType() {
+        return outputType;
+    }
+
+    /**
+     * @param outputType the outputType to set
+     */
+    public void setOutputType(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 conversationSequence
+     */
+    public ConversationSequence getConversationSequence() {
+        return conversationSequence;
+    }
+
+    /**
+     * @param conversationSequence the conversationSequence to set
+     */
+    public void setConversationSequence(ConversationSequence conversationSequence) {
+        this.conversationSequence = conversationSequence;
+    }
+
+    /**
+     * @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 (this.outputType != null) {
+            copy.outputType = (DataType) this.outputType.clone();
+        }
+
+        copy.attributes = new ConcurrentHashMap<Object, Object>();
+        copy.attributes.putAll(attributes);
+
+        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;
+    }
+
+}
diff --git a/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/util/ElementInfo.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/util/ElementInfo.java
new file mode 100644
index 0000000000..777fa567f1
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/util/ElementInfo.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.interfacedef.util;
+
+import javax.xml.namespace.QName;
+
+/**
+ * An abstraction of XML schema elements.
+ *
+ * @version $Rev$ $Date$
+ */
+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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/util/FaultException.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/util/FaultException.java
new file mode 100644
index 0000000000..844b0af509
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/util/FaultException.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.interfacedef.util;
+
+import javax.xml.namespace.QName;
+
+/**
+ * The generic java exception to wrap service faults
+ * 
+ * @version $Rev$ $Date$
+ */
+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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/util/JavaXMLMapper.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/util/JavaXMLMapper.java
new file mode 100644
index 0000000000..54c0a3ec11
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/util/JavaXMLMapper.java
@@ -0,0 +1,143 @@
+/*
+ * 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 $Rev$ $Date$
+ */
+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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/util/TypeInfo.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/util/TypeInfo.java
new file mode 100644
index 0000000000..2598dc8545
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/util/TypeInfo.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.util;
+
+import javax.xml.namespace.QName;
+
+/**
+ * An abstraction of XML schema types
+ *
+ * @version $Rev$ $Date$
+ */
+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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/util/WrapperInfo.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/util/WrapperInfo.java
new file mode 100644
index 0000000000..12db460959
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/util/WrapperInfo.java
@@ -0,0 +1,190 @@
+/*
+ * 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 $Rev$ $Date$
+ */
+public class WrapperInfo {
+    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;
+    }
+}
diff --git a/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/util/XMLType.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/util/XMLType.java
new file mode 100644
index 0000000000..26ecf6e352
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/interfacedef/util/XMLType.java
@@ -0,0 +1,152 @@
+/*
+ * 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 $Rev$ $Date$
+ */
+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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/BindingType.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/BindingType.java
new file mode 100644
index 0000000000..f43c428563
--- /dev/null
+++ b/sca-java-2.x/trunk/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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/DefaultPolicyFactory.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/DefaultPolicyFactory.java
new file mode 100644
index 0000000000..2da41675a1
--- /dev/null
+++ b/sca-java-2.x/trunk/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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/ExtensionType.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/ExtensionType.java
new file mode 100644
index 0000000000..e7a93c8907
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/ExtensionType.java
@@ -0,0 +1,81 @@
+/*
+ * 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
+ */
+public interface ExtensionType {
+    QName BINDING_BASE = new QName("http://docs.oasis-open.org/ns/opencsa/sca/200903", "binding");
+    QName IMPLEMENTATION_BASE = new QName("http://docs.oasis-open.org/ns/opencsa/sca/200903", "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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/ImplementationType.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/ImplementationType.java
new file mode 100644
index 0000000000..d142015f57
--- /dev/null
+++ b/sca-java-2.x/trunk/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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/Intent.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/Intent.java
new file mode 100644
index 0000000000..b79ccdab78
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/Intent.java
@@ -0,0 +1,160 @@
+/*
+ * 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 $Rev$ $Date$
+ */
+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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/IntentMap.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/IntentMap.java
new file mode 100644
index 0000000000..5b401baeb3
--- /dev/null
+++ b/sca-java-2.x/trunk/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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/PolicyAttachment.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/PolicyAttachment.java
new file mode 100644
index 0000000000..ee4f5b5236
--- /dev/null
+++ b/sca-java-2.x/trunk/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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/PolicyExpression.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/PolicyExpression.java
new file mode 100644
index 0000000000..a29f214f98
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/PolicyExpression.java
@@ -0,0 +1,65 @@
+/*
+ * 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 $Rev$ $Date$
+ */
+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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/PolicyFactory.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/PolicyFactory.java
new file mode 100644
index 0000000000..9e7de2f6da
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/PolicyFactory.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;
+
+/**
+ * A factory for the policy model.
+ *
+ * @version $Rev$ $Date$
+ */
+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();
+
+}
diff --git a/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/PolicySet.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/PolicySet.java
new file mode 100644
index 0000000000..2b5b8458d5
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/PolicySet.java
@@ -0,0 +1,146 @@
+/*
+ * 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 $Rev$ $Date$
+ */
+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);
+
+}
diff --git a/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/PolicySubject.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/PolicySubject.java
new file mode 100644
index 0000000000..35a86ceedf
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/PolicySubject.java
@@ -0,0 +1,56 @@
+/*
+ * 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>
+ */
+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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/Qualifier.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/Qualifier.java
new file mode 100644
index 0000000000..c1862283c7
--- /dev/null
+++ b/sca-java-2.x/trunk/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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/BindingTypeImpl.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/BindingTypeImpl.java
new file mode 100644
index 0000000000..1a2a9c5bad
--- /dev/null
+++ b/sca-java-2.x/trunk/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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/ExtensionTypeImpl.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/ExtensionTypeImpl.java
new file mode 100644
index 0000000000..97fbc19ced
--- /dev/null
+++ b/sca-java-2.x/trunk/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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/ImplementationTypeImpl.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/ImplementationTypeImpl.java
new file mode 100644
index 0000000000..5c285e4d95
--- /dev/null
+++ b/sca-java-2.x/trunk/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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/IntentImpl.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/IntentImpl.java
new file mode 100644
index 0000000000..27a77f3ba8
--- /dev/null
+++ b/sca-java-2.x/trunk/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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/IntentMapImpl.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/IntentMapImpl.java
new file mode 100644
index 0000000000..357b7afab4
--- /dev/null
+++ b/sca-java-2.x/trunk/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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/PolicyExpressionImpl.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/PolicyExpressionImpl.java
new file mode 100644
index 0000000000..71e5eef6a7
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/PolicyExpressionImpl.java
@@ -0,0 +1,86 @@
+/*
+ * 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;
+    }
+
+    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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/PolicyFactoryImpl.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/PolicyFactoryImpl.java
new file mode 100644
index 0000000000..c67ff1eab8
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/PolicyFactoryImpl.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.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;
+
+/**
+ * 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();
+    }
+
+}
diff --git a/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/PolicySetImpl.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/PolicySetImpl.java
new file mode 100644
index 0000000000..75d1229cd8
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/PolicySetImpl.java
@@ -0,0 +1,145 @@
+/*
+ * 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>();
+
+    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;
+    }
+
+}
diff --git a/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/QualifierImpl.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/impl/QualifierImpl.java
new file mode 100644
index 0000000000..102bea8d41
--- /dev/null
+++ b/sca-java-2.x/trunk/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/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/util/PolicyHelper.java b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/util/PolicyHelper.java
new file mode 100644
index 0000000000..f87938a5cb
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/policy/util/PolicyHelper.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.util;
+
+import java.util.ArrayList;
+import java.util.Collection;
+
+import javax.xml.namespace.QName;
+
+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
+ */
+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;
+    }
+
+}