Create 2.0 M4 release branch

git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@830484 13f79535-47bb-0310-9956-ffa450edef68

13 files changed, 2129 insertions, 0 deletions

diff --git a/branches/sca-java-2.0-M4/modules/implementation-bpel/src/main/java/org/apache/tuscany/sca/implementation/bpel/BPELFactory.java b/branches/sca-java-2.0-M4/modules/implementation-bpel/src/main/java/org/apache/tuscany/sca/implementation/bpel/BPELFactory.java
new file mode 100644
index 0000000000..9f8f9c0e9a
--- /dev/null
+++ b/branches/sca-java-2.0-M4/modules/implementation-bpel/src/main/java/org/apache/tuscany/sca/implementation/bpel/BPELFactory.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.implementation.bpel;
+
+/**
+ * A factory for the BPEL implementation model.
+ * 
+ * @version $Rev$ $Date$
+ */
+public interface BPELFactory {
+    
+    /**
+     * Creates a new BPEL implementation.
+     * 
+     * @return
+     */
+    BPELImplementation createBPELImplementation();
+
+    /**
+     * Creates a new BPEL Process Definition
+     * 
+     * @return
+     */
+    BPELProcessDefinition createBPELProcessDefinition();
+}
diff --git a/branches/sca-java-2.0-M4/modules/implementation-bpel/src/main/java/org/apache/tuscany/sca/implementation/bpel/BPELImplementation.java b/branches/sca-java-2.0-M4/modules/implementation-bpel/src/main/java/org/apache/tuscany/sca/implementation/bpel/BPELImplementation.java
new file mode 100644
index 0000000000..f8f7ee0ae2
--- /dev/null
+++ b/branches/sca-java-2.0-M4/modules/implementation-bpel/src/main/java/org/apache/tuscany/sca/implementation/bpel/BPELImplementation.java
@@ -0,0 +1,91 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.sca.implementation.bpel;
+
+import javax.xml.namespace.QName;
+
+import org.apache.tuscany.sca.assembly.ComponentType;
+import org.apache.tuscany.sca.assembly.Implementation;
+import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
+
+/**
+ * The model representing the BPEL implementation in an SCA assembly model.
+ *
+ * @version $Rev$ $Date$
+ */
+public interface BPELImplementation extends Implementation {
+    QName TYPE = new QName(SCA11_NS, "implementation.bpel");
+    /**
+     * Get the BPEL process Name
+     *
+     * @return
+     */
+    QName getProcess();
+
+    /**
+     * Set the BPEL process Name
+     *
+     * @param processName process QName
+     */
+    void setProcess(QName processName);
+
+    /**
+     * Get the BPEL process definition
+     *
+     * @return
+     */
+    BPELProcessDefinition getProcessDefinition();
+
+    /**
+     * Set the BPEL process definition
+     *
+     * @param processDefinition
+     */
+    void setProcessDefinition(BPELProcessDefinition processDefinition);
+
+    /**
+     * Returns the componentType for this implementation.
+     *
+     *  @return
+     */
+    public ComponentType getComponentType();
+
+    /**
+     * Sets the componentType for this implementation
+     *
+     * @param componentType the component type to set
+     */
+    public void setComponentType(ComponentType componentType);
+
+    /**
+     * Returns the model resolver that can be used to resolve WSDLs and XSDs
+     * referenced by the BPEL process.
+     *
+     * @return
+     */
+    ModelResolver getModelResolver();
+
+    /**
+     * Sets the model resolver that can be used to resolve WSDLs and XSDs referenced
+     * by the BPEL process.
+     *
+     * @param modelResolver
+     */
+    void setModelResolver(ModelResolver modelResolver);
+}
diff --git a/branches/sca-java-2.0-M4/modules/implementation-bpel/src/main/java/org/apache/tuscany/sca/implementation/bpel/BPELProcessDefinition.java b/branches/sca-java-2.0-M4/modules/implementation-bpel/src/main/java/org/apache/tuscany/sca/implementation/bpel/BPELProcessDefinition.java
new file mode 100644
index 0000000000..ac02b696cc
--- /dev/null
+++ b/branches/sca-java-2.0-M4/modules/implementation-bpel/src/main/java/org/apache/tuscany/sca/implementation/bpel/BPELProcessDefinition.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.implementation.bpel;
+
+import java.util.List;
+
+import javax.wsdl.PortType;
+import javax.xml.namespace.QName;
+
+import org.apache.tuscany.sca.assembly.Base;
+import org.apache.tuscany.sca.assembly.Property;
+import org.apache.tuscany.sca.implementation.bpel.xml.BPELImportElement;
+import org.apache.tuscany.sca.implementation.bpel.xml.BPELPartnerLinkElement;
+import org.apache.tuscany.sca.interfacedef.wsdl.WSDLInterface;
+
+/**
+ * The model representing a BPEL process definition.
+ *
+ * @version $Rev$ $Date$
+ */
+public interface BPELProcessDefinition extends Base {
+
+    /**
+     * Get the BPEL process Name
+     * 
+     * @return
+     */
+    QName getName();
+
+    /**
+     * Set the BPEL process Name
+     * 
+     * @param processName process QName
+     */
+    void setName(QName name);
+
+    /**
+     * Get BPEL process URI
+     * 
+     * @return URI for the process
+     */
+    String getURI();
+
+    /**
+     * Set the BPEL process URI
+     * 
+     * @param uri for the process
+     */
+    void setURI(String uri);
+
+    /**
+     * Get the URL for the process location
+     * 
+     * @return
+     */
+    String getLocation();
+
+    /**
+     * Set the URL for the process location
+     * 
+     * @param url
+     */
+    void setLocation(String location);
+    
+    /**
+     * Return the list of PartnerLinks for this process
+     * 
+     * @return
+     */
+    List<BPELPartnerLinkElement> getPartnerLinks();
+    
+    /**
+     * Return the list of imports for this process
+     * 
+     * @return
+     */
+    List<BPELImportElement> getImports();
+    
+    /**
+     * Return the collection of associated port types
+     * 
+     * @return
+     */
+    public List<PortType> getPortTypes() ;
+    
+    /**
+     * Return the collection of associated WSDL interfaces
+     * @return
+     */
+    public List<WSDLInterface> getInterfaces() ;
+    
+    /**
+     * Return a collection of (SCA) Properties associated with this process
+     * @return - a List of SCA Property objects
+     */
+    public List<Property> getProperties();
+}
diff --git a/branches/sca-java-2.0-M4/modules/implementation-bpel/src/main/java/org/apache/tuscany/sca/implementation/bpel/impl/BPELFactoryImpl.java b/branches/sca-java-2.0-M4/modules/implementation-bpel/src/main/java/org/apache/tuscany/sca/implementation/bpel/impl/BPELFactoryImpl.java
new file mode 100644
index 0000000000..bd98a4af95
--- /dev/null
+++ b/branches/sca-java-2.0-M4/modules/implementation-bpel/src/main/java/org/apache/tuscany/sca/implementation/bpel/impl/BPELFactoryImpl.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.implementation.bpel.impl;
+
+import org.apache.tuscany.sca.implementation.bpel.BPELFactory;
+import org.apache.tuscany.sca.implementation.bpel.BPELImplementation;
+import org.apache.tuscany.sca.implementation.bpel.BPELProcessDefinition;
+
+/**
+ * A factory for the BPEL implementation model.
+ * 
+ * @version $Rev$ $Date$
+ */
+public class BPELFactoryImpl implements BPELFactory {
+    
+    public BPELFactoryImpl() {
+    }
+
+    public BPELImplementation createBPELImplementation() {
+        return new BPELImplementationImpl();
+    }
+
+    public BPELProcessDefinition createBPELProcessDefinition() {
+        return new BPELProcessDefinitionImpl();
+    }
+
+}
diff --git a/branches/sca-java-2.0-M4/modules/implementation-bpel/src/main/java/org/apache/tuscany/sca/implementation/bpel/impl/BPELImplementationImpl.java b/branches/sca-java-2.0-M4/modules/implementation-bpel/src/main/java/org/apache/tuscany/sca/implementation/bpel/impl/BPELImplementationImpl.java
new file mode 100644
index 0000000000..ad8b3a7bcf
--- /dev/null
+++ b/branches/sca-java-2.0-M4/modules/implementation-bpel/src/main/java/org/apache/tuscany/sca/implementation/bpel/impl/BPELImplementationImpl.java
@@ -0,0 +1,127 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.sca.implementation.bpel.impl;
+
+import java.util.List;
+
+import javax.xml.namespace.QName;
+
+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.assembly.impl.ImplementationImpl;
+import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
+import org.apache.tuscany.sca.implementation.bpel.BPELImplementation;
+import org.apache.tuscany.sca.implementation.bpel.BPELProcessDefinition;
+
+/**
+ * The model representing a BPEL implementation in an SCA assembly model.
+ *
+ * @version $Rev$ $Date$
+ */
+class BPELImplementationImpl extends ImplementationImpl implements BPELImplementation {
+
+    private QName processName;
+    private BPELProcessDefinition processDefinition;
+    private ComponentType componentType;
+    private ModelResolver modelResolver;
+
+    protected BPELImplementationImpl() {
+        super(TYPE);
+    }
+
+    public QName getProcess() {
+        return processName;
+    }
+
+    public void setProcess(QName processName) {
+        this.processName = processName;
+    }
+
+    public BPELProcessDefinition getProcessDefinition() {
+        return this.processDefinition;
+    }
+
+    public void setProcessDefinition(BPELProcessDefinition processDefinition) {
+        this.processDefinition = processDefinition;
+    }
+
+    @Override
+    public String getURI() {
+        // The BPEL implementation does not have a URI
+        return null;
+    }
+
+    @Override
+    public void setURI(String uri) {
+        // The BPEL implementation does not have a URI
+    }
+
+    @Override
+    public List<Property> getProperties() {
+        return componentType.getProperties();
+    }
+
+    public ComponentType getComponentType() {
+        return componentType;
+    }
+
+    public void setComponentType(ComponentType componentType) {
+        this.componentType = componentType;
+    }
+
+    public ModelResolver getModelResolver() {
+        return modelResolver;
+    }
+
+    public void setModelResolver(ModelResolver modelResolver) {
+        this.modelResolver = modelResolver;
+    }
+
+    @Override
+    public List<Service> getServices() {
+        return componentType.getServices();
+    }
+
+    @Override
+    public List<Reference> getReferences() {
+        return componentType.getReferences();
+    }
+
+    @Override
+    public int hashCode() {
+        return String.valueOf(this.getProcess()).hashCode();
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (obj == this) {
+            return true;
+        } else if (obj instanceof BPELImplementation) {
+            if (getProcess() != null) {
+                return getProcess().equals(((BPELImplementation)obj).getProcess());
+            } else {
+                return ((BPELImplementation)obj).getProcess() == null;
+            }
+        } else {
+            return false;
+        }
+    }
+}
diff --git a/branches/sca-java-2.0-M4/modules/implementation-bpel/src/main/java/org/apache/tuscany/sca/implementation/bpel/impl/BPELProcessDefinitionImpl.java b/branches/sca-java-2.0-M4/modules/implementation-bpel/src/main/java/org/apache/tuscany/sca/implementation/bpel/impl/BPELProcessDefinitionImpl.java
new file mode 100644
index 0000000000..5ef4a4c113
--- /dev/null
+++ b/branches/sca-java-2.0-M4/modules/implementation-bpel/src/main/java/org/apache/tuscany/sca/implementation/bpel/impl/BPELProcessDefinitionImpl.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.implementation.bpel.impl;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import javax.wsdl.PortType;
+import javax.xml.namespace.QName;
+
+import org.apache.tuscany.sca.assembly.Property;
+import org.apache.tuscany.sca.implementation.bpel.BPELProcessDefinition;
+import org.apache.tuscany.sca.implementation.bpel.xml.BPELImportElement;
+import org.apache.tuscany.sca.implementation.bpel.xml.BPELPartnerLinkElement;
+import org.apache.tuscany.sca.interfacedef.wsdl.WSDLInterface;
+
+/**
+ * The BPEL process definition implementation.
+ * 
+ * @version $Rev$ $Date$
+ */
+class BPELProcessDefinitionImpl implements BPELProcessDefinition {
+    private QName 	name;
+    private String 	uri;
+    private String 	location;
+    private boolean unresolved;
+    private List<BPELPartnerLinkElement> 	partnerLinks 	= new ArrayList<BPELPartnerLinkElement>();
+    private List<BPELImportElement> 		imports 		= new ArrayList<BPELImportElement>();
+    private List<PortType> 					thePortTypes 	= new ArrayList<PortType>();
+    private List<WSDLInterface> 			theInterfaces 	= new ArrayList<WSDLInterface>();
+    private List<Property> 					theProperties 	= new ArrayList<Property>();
+    
+    public QName getName() {
+        return name;
+    }
+
+    public void setName(QName name) {
+        this.name = name;
+    }
+
+    public String getURI() {
+        return uri;
+    }
+    
+    public void setURI(String uri) {
+        this.uri = uri;
+    }
+    
+    public String getLocation() {
+        return location;
+    }
+
+    public void setLocation(String location) {
+        this.location = location; 
+    }
+
+    public boolean isUnresolved() {
+        return unresolved;
+    }
+
+    public void setUnresolved(boolean undefined) {
+        this.unresolved = undefined;
+    }  
+    
+    public List<BPELPartnerLinkElement> getPartnerLinks() {
+    	return partnerLinks;
+    }
+    
+    public List<BPELImportElement> getImports() {
+    	return imports;
+    }
+    
+    public List<PortType> getPortTypes() {
+    	return thePortTypes;
+    }
+    
+    public List<WSDLInterface> getInterfaces() {
+    	return theInterfaces;
+    }
+    
+    @Override
+    public int hashCode() {
+        return String.valueOf(getName()).hashCode();
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (obj == this) {
+            return true;
+        } else if (obj instanceof BPELProcessDefinition) {
+            if (getName() != null) {
+                return getName().equals(((BPELProcessDefinition)obj).getName());
+            } else {
+                return ((BPELProcessDefinition)obj).getName() == null;
+            }
+        } else {
+            return false;
+        }
+    }
+
+	public List<Property> getProperties() {
+		return theProperties;
+	} // end method getProperties
+
+	/**
+	 * toString() method to produce a useful String to characterize this BPEL Process implementation during debugging
+	 */
+	public String toString() {
+		return "BPEL Process: " + name.toString();
+	}
+} // end class BPELProcessDefinitionImpl
diff --git a/branches/sca-java-2.0-M4/modules/implementation-bpel/src/main/java/org/apache/tuscany/sca/implementation/bpel/xml/BPELDocumentModelResolver.java b/branches/sca-java-2.0-M4/modules/implementation-bpel/src/main/java/org/apache/tuscany/sca/implementation/bpel/xml/BPELDocumentModelResolver.java
new file mode 100644
index 0000000000..83860f59e5
--- /dev/null
+++ b/branches/sca-java-2.0-M4/modules/implementation-bpel/src/main/java/org/apache/tuscany/sca/implementation/bpel/xml/BPELDocumentModelResolver.java
@@ -0,0 +1,401 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.implementation.bpel.xml;
+
+import java.net.URI;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import javax.wsdl.Definition;
+import javax.wsdl.PortType;
+import javax.wsdl.extensions.ExtensibilityElement;
+import javax.xml.namespace.QName;
+
+import org.apache.tuscany.sca.contribution.Contribution;
+import org.apache.tuscany.sca.contribution.Import;
+import org.apache.tuscany.sca.contribution.namespace.NamespaceImport;
+import org.apache.tuscany.sca.contribution.processor.ContributionResolveException;
+import org.apache.tuscany.sca.contribution.processor.ProcessorContext;
+import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
+import org.apache.tuscany.sca.core.FactoryExtensionPoint;
+import org.apache.tuscany.sca.implementation.bpel.BPELProcessDefinition;
+import org.apache.tuscany.sca.interfacedef.InvalidInterfaceException;
+import org.apache.tuscany.sca.interfacedef.wsdl.BPELPartnerLinkTypeExt;
+import org.apache.tuscany.sca.interfacedef.wsdl.WSDLDefinition;
+import org.apache.tuscany.sca.interfacedef.wsdl.WSDLFactory;
+import org.apache.tuscany.sca.interfacedef.wsdl.WSDLInterface;
+import org.apache.tuscany.sca.interfacedef.wsdl.WSDLObject;
+import org.apache.tuscany.sca.monitor.Monitor;
+import org.apache.tuscany.sca.monitor.Problem;
+import org.apache.tuscany.sca.monitor.Problem.Severity;
+
+/**
+ * A Model Resolver for BPEL process models.
+ *
+ * @version $Rev$ $Date$
+ */
+public class BPELDocumentModelResolver implements ModelResolver {
+	
+    private WSDLFactory wsdlFactory;
+    private Contribution contribution;
+    private Map<QName, BPELProcessDefinition> map = new HashMap<QName, BPELProcessDefinition>();
+    
+    public BPELDocumentModelResolver(Contribution contribution, FactoryExtensionPoint modelFactories) {
+    	this.wsdlFactory = modelFactories.getFactory(WSDLFactory.class);
+        this.contribution = contribution;
+    }
+
+    public void addModel(Object resolved, ProcessorContext context) {
+        BPELProcessDefinition process = (BPELProcessDefinition)resolved;
+        map.put(process.getName(), process);
+    }
+    
+    public Object removeModel(Object resolved, ProcessorContext context) {
+        return map.remove(((BPELProcessDefinition)resolved).getName());
+    }
+    
+    public <T> T resolveModel(Class<T> modelClass, T unresolved, ProcessorContext context) {    	
+    	BPELProcessDefinition resolved = null;
+    	QName qname = ((BPELProcessDefinition)unresolved).getName();
+    	
+    	// Lookup a definition for the given namespace, from imports
+    	List<String> locations = new ArrayList<String>();
+        // Collection of namespace imports with location
+        Map<String, NamespaceImport> locationMap = new HashMap<String, NamespaceImport>();
+        for (Import import_ : this.contribution.getImports()) {
+            if (import_ instanceof NamespaceImport) {
+                NamespaceImport namespaceImport = (NamespaceImport)import_;
+                if (namespaceImport.getNamespace().equals(qname.getNamespaceURI())) {
+                    if (namespaceImport.getLocation() == null) {
+	                    // Delegate the resolution to the import resolver
+	                    resolved = namespaceImport.getModelResolver().resolveModel(BPELProcessDefinition.class, (BPELProcessDefinition)unresolved, context);
+	                    if (!resolved.isUnresolved()) {
+	                        return modelClass.cast(resolved);
+	                    }
+                    } else {
+                    	// We might have multiple imports for the same namespace,
+                		// need to search them in lexical order.
+                		locations.add(namespaceImport.getLocation());
+                    }
+                }
+            }
+        }
+        // Search namespace imports with locations in lexical order
+        Collections.sort(locations);
+        for (String location : locations) {
+        	NamespaceImport namespaceImport = (NamespaceImport)locationMap.get(location);
+        	// Delegate the resolution to the namespace import resolver
+            resolved = namespaceImport.getModelResolver().resolveModel(BPELProcessDefinition.class, (BPELProcessDefinition)unresolved, context);
+            if (!resolved.isUnresolved()) {
+                return modelClass.cast(resolved);
+            }
+        }
+        
+        
+        // Not found, Lookup a definition for the given namespace, within contribution       
+        resolved = (BPELProcessDefinition) map.get(qname);
+        
+        if(resolved.isUnresolved()) {
+        	try {
+        		resolve(resolved, context);
+        	} catch(Exception e) {
+        		//FIXME
+        	}
+        }
+        
+        if (resolved != null) {
+            return modelClass.cast(resolved);
+        }        
+        
+        return (T)unresolved;
+    }
+    
+    public void resolve(BPELProcessDefinition unresolved, ProcessorContext context) throws ContributionResolveException {
+        // FIXME - serious resolving needs to happen here
+    	
+    	// Step 1 is to resolve the WSDL files referenced from this BPEL process
+    	// - one complexity here is that the WSDL definitions hold BPEL extension elements for
+    	// the partnerLinkType declarations - and these must be used in later steps
+    	//
+    	// Step 2 is to take all the partnerLink definitions and establish the PortType being
+    	// used, by tracing through the related partnerLinkType declarations - the PortType is
+    	// effectively a definition of the interface used by the partnerLink.
+    	// - another consideration here is that each partnerLink can involve 2 interfaces, one
+    	// for the forward calls to the process, the other for calls from the process - depending
+    	// on whether the partnerLink is a reference or a service, one of these interfaces is a
+    	// callback interface.
+
+    	List<BPELImportElement> theImports = unresolved.getImports();
+    	Set<Definition> wsdlDefinitions = getImportedWSDLDefinitions( theImports, contribution.getModelResolver(), context );
+    	
+    	// Fetch the sets of partner links, port types and interfaces
+    	List<BPELPartnerLinkTypeElement> thePLinkTypes = getPartnerLinkTypes( wsdlDefinitions, context.getMonitor() );
+    	Collection<WSDLInterface> theInterfaces = (Collection<WSDLInterface>)new ArrayList<WSDLInterface>();
+    	Collection<PortType> thePortTypes = getAllPortTypes( theImports, theInterfaces, contribution.getModelResolver(), context );
+    	
+    	// Store the Port Types and the Interfaces for later calculation of the component type...
+    	unresolved.getPortTypes().addAll(thePortTypes);
+    	unresolved.getInterfaces().addAll(theInterfaces);
+    	
+    	// Now, for each partnerLink in the BPEL process, find the related partnerLinkType element 
+        List<BPELPartnerLinkElement> thePartnerLinks = unresolved.getPartnerLinks();
+        for (BPELPartnerLinkElement thePartnerLink : thePartnerLinks) {
+            QName partnerLinkType = thePartnerLink.getPartnerLinkType();
+            BPELPartnerLinkTypeElement pLinkType = findPartnerLinkType(partnerLinkType, thePLinkTypes);
+            if (pLinkType == null) {
+                error(context.getMonitor(), "PartnerLinkNoMatchingType", thePartnerLink, thePartnerLink.getName());
+            } else {
+                thePartnerLink.setPartnerLinkType(pLinkType);
+            }
+        } // end for
+        
+        unresolved.setUnresolved(false);
+    	
+    } // end resolve    
+    
+    /**
+     * Get all the WSDL definitions referenced through the import statements of the BPEL process
+     * @param theImports - a list of the import statements
+     * @return - a Set containing all the referenced WSDL definitions
+     */
+    private Set<Definition> getImportedWSDLDefinitions( List<BPELImportElement> theImports, ModelResolver resolver, ProcessorContext context ) {
+    	Set<Definition> wsdlDefinitions = null;
+    	for (BPELImportElement theImport : theImports) {
+            if (theImport.getImportType().equals(BPELProcessorConstants.WSDL_NS)) {
+            	// If the Import is a WSDL import, resolve the WSDL
+            	WSDLDefinition theWSDL = resolveWSDLDefinition( theImport.getLocation(), 
+            			                                        theImport.getNamespace(), resolver, context );
+                if( theWSDL != null ) {
+	            	theImport.setWSDLDefinition( theWSDL );
+	            	
+	                // Find all the WSDL definitions matching the imported namespace
+	            	if( wsdlDefinitions == null ) {
+	            		wsdlDefinitions = new HashSet<Definition>();
+	            	} // end if 
+	            	
+	                wsdlDefinitions.add(theWSDL.getDefinition());
+                } // end if
+            } // end if
+        } // end for
+        
+        return wsdlDefinitions;
+    } // end getImportedWSDLDefinitions
+    
+    /**
+     * Resolve a reference to a WSDL, given by a namespace and a location
+     * @param wsdlLocation - a string containing the WSDL location
+     * @param wsdlNamespace - a string containing the WSDL namespace
+     * @param resolver - a model resolver
+     * @param context 
+     * @return - a WSDLDefinition object for the referenced WSDL, or null if the WSDL cannot be resolved
+     */
+    private WSDLDefinition resolveWSDLDefinition( String wsdlLocation, String wsdlNamespace, ModelResolver resolver, ProcessorContext context ) {
+        
+        // Resolve the WSDL definition
+        WSDLDefinition proxy = wsdlFactory.createWSDLDefinition();
+        proxy.setUnresolved(true);
+        proxy.setNamespace(wsdlNamespace);
+        if (wsdlLocation != null) {
+            proxy.setLocation(URI.create(wsdlLocation));
+        }
+        WSDLDefinition resolved = resolver.resolveModel(WSDLDefinition.class, proxy, context);
+        if (resolved != null && !resolved.isUnresolved()) {
+        	return resolved;
+        } else {
+            error(context.getMonitor(), "CannotResolveWSDLReference", resolver, wsdlLocation, wsdlNamespace);
+            return null;
+        } // end if
+    } // end resolveWSDLDefinition
+    
+
+    /**
+     * Retrieve all the Partner Link types defined in the imported WSDL files
+     * 
+     * @param wsdlDefinitions - the set of imported WSDL definitions
+     * @return - a List of PartnerLinkType elements
+     */
+    @SuppressWarnings("unchecked")
+    private List<BPELPartnerLinkTypeElement> getPartnerLinkTypes( Set<Definition> wsdlDefinitions, Monitor monitor ) throws ContributionResolveException {
+    	
+    	List<BPELPartnerLinkTypeElement> thePLinks = new ArrayList<BPELPartnerLinkTypeElement>();
+
+        // The BPEL partnerLinkType elements are extension elements within the WSDL definitions
+        for (Definition wsdlDefinition: wsdlDefinitions) {
+            for (ExtensibilityElement theElement : (List<ExtensibilityElement>)wsdlDefinition.getExtensibilityElements()) {
+                QName elementType = theElement.getElementType();
+                if (elementType.equals(BPELProcessorConstants.LINKTYPE_ELEMENT) || elementType.equals(BPELProcessorConstants.LINKTYPE_ELEMENT_20)) {
+                    BPELPartnerLinkTypeExt pLinkExt = (BPELPartnerLinkTypeExt)theElement;
+                    
+                    // Fetch the name of the partnerLinkType
+                    QName qName = new QName(wsdlDefinition.getTargetNamespace(), pLinkExt.getName());
+                    BPELPartnerLinkTypeElement pLinkElement = new BPELPartnerLinkTypeElement(qName);
+
+                    // The partnerLinkType must have one and may have 2 role child elements
+                    int count = 0;
+                    for (int i = 0; i < 2; i++) {
+                        if( count > 1 ) break;
+                    	if (pLinkExt.getRoleName(i) == null) continue;
+                        PortType pType = wsdlDefinition.getPortType(pLinkExt.getRolePortType(i));
+                        if (count == 0) {
+                            pLinkElement.setRole1(pLinkExt.getRoleName(i), pLinkExt.getRolePortType(i), pType);
+                        } else {
+                            pLinkElement.setRole2(pLinkExt.getRoleName(i), pLinkExt.getRolePortType(i), pType);
+                        } // end if
+                        count++;
+                    } // end for
+
+                    if (count == 0) {
+                        error(monitor, "PartnerLinkTypeNoRoles", theElement, pLinkElement.getName());
+                        throw new ContributionResolveException("partnerLinkType " + pLinkElement.getName() + " has no Roles defined");
+                    } else
+                        thePLinks.add(pLinkElement);
+                } // end if
+            } // end for
+        } // end for
+        return thePLinks;
+    } // end getPartnerLinkTypes
+    
+
+    /**
+     * Finds a partnerLinkType definition within the WSDLs imported by the BPEL
+     * process.
+     * 
+     * @param partnerLinkTypeName - the name of the partnerLinkType
+     * @param theImports a list of the WSDL import declarations
+     * @return a BPELPartnerLinkTypeElement for the partnerLinkType or null if it cannot be
+     * found
+     */
+    private BPELPartnerLinkTypeElement findPartnerLinkType( QName partnerLinkTypeName, List<BPELPartnerLinkTypeElement> thePLinkTypes) {
+    	// We must find the partner link type element from amongst the imported WSDLs
+    	for ( BPELPartnerLinkTypeElement thePLinkType : thePLinkTypes ){
+    		if( thePLinkType.getName().equals(partnerLinkTypeName) ) return thePLinkType;
+     	} // end for
+    	return null;
+    } // end findPartnerLinkType
+    
+
+    /**
+     * Returns all the portTypes referenced by the process.
+     * 
+     * @param theImports
+     * @param theInterfaces
+     * @param resolver
+     * @return
+     * @throws ContributionResolveException
+     */
+    @SuppressWarnings("unchecked")
+    private Collection<PortType> getAllPortTypes(List<BPELImportElement> theImports,
+                                                 Collection<WSDLInterface> theInterfaces, 
+                                                 ModelResolver resolver,
+                                                 ProcessorContext context) throws ContributionResolveException {
+
+        Set<PortType> thePortTypes = new HashSet<PortType>();
+        for (BPELImportElement theImport : theImports) {
+            if (theImport.getImportType().equals(BPELProcessorConstants.WSDL_NS)) {
+                
+                // Find all the WSDL definitions matching the imported namespace
+                List<Definition> wsdlDefinitions = new ArrayList<Definition>();
+                WSDLDefinition theWSDL = theImport.getWSDLDefinition();
+                wsdlDefinitions.add(theWSDL.getDefinition());
+                for (WSDLDefinition importedWSDL: theWSDL.getImportedDefinitions()) {
+                    wsdlDefinitions.add(importedWSDL.getDefinition());
+                }
+                for (Definition wsdlDefinition: wsdlDefinitions) {
+
+                    Collection<PortType> portTypes = (Collection<PortType>)wsdlDefinition.getPortTypes().values();
+                    
+                    // Create WSDLInterface elements for each unique PortType found
+                    for (PortType portType : portTypes) {
+                    	if( thePortTypes.contains(portType) ) continue;
+                    	thePortTypes.add( portType );
+                    		
+                        WSDLObject<PortType> wsdlPortType = theWSDL.getWSDLObject(PortType.class, portType.getQName());
+                        WSDLInterface wsdlInterface;
+                        if (wsdlPortType != null) {
+                            // Introspect the WSDL portType and add the resulting WSDLInterface to the resolver
+                            try {
+                                wsdlInterface = wsdlFactory.createWSDLInterface(wsdlPortType.getElement(), theWSDL, resolver, context.getMonitor());
+                                wsdlInterface.setWsdlDefinition(theWSDL);
+                            } catch (InvalidInterfaceException e) {
+                                ContributionResolveException ce = 
+                                	new ContributionResolveException("Unable to create WSDLInterface for portType " + portType.getQName(),e);
+                                error(context.getMonitor(), "ContributionResolveException", resolver, ce);
+                                throw ce;
+                            } // end try
+                            resolver.addModel(wsdlInterface, context);
+                            theInterfaces.add(wsdlInterface);
+                        } // end if
+                    } // end for
+                }
+            }
+        } // end for
+
+        return thePortTypes;
+    } // end getAllPortTypes
+    
+    /**
+     * Report a warning.
+     * 
+     * @param problems
+     * @param message
+     * @param model
+     */
+    private void warning(Monitor monitor, String message, Object model, Object... messageParameters) {
+        if (monitor != null) {
+            Problem problem = monitor.createProblem(this.getClass().getName(), "impl-bpel-validation-messages", Severity.WARNING, model, message, (Object[])messageParameters);
+            monitor.problem(problem);
+        }
+    }
+
+    /**
+     * Report a error.
+     * 
+     * @param problems
+     * @param message
+     * @param model
+     */
+    private void error(Monitor monitor, String message, Object model, Object... messageParameters) {
+        if (monitor != null) {
+            Problem problem = monitor.createProblem(this.getClass().getName(), "impl-bpel-validation-messages", Severity.ERROR, model, message, (Object[])messageParameters);
+            monitor.problem(problem);
+        }
+    }
+
+    /**
+     * Report a exception.
+     * 
+     * @param problems
+     * @param message
+     * @param model
+     */
+    private void error(Monitor monitor, String message, Object model, Exception ex) {
+        if (monitor != null) {
+            Problem problem = monitor.createProblem(this.getClass().getName(), "impl-bpel-validation-messages", Severity.ERROR, model, message, ex);
+            monitor.problem(problem);
+        }
+    }
+    
+}
diff --git a/branches/sca-java-2.0-M4/modules/implementation-bpel/src/main/java/org/apache/tuscany/sca/implementation/bpel/xml/BPELDocumentProcessor.java b/branches/sca-java-2.0-M4/modules/implementation-bpel/src/main/java/org/apache/tuscany/sca/implementation/bpel/xml/BPELDocumentProcessor.java
new file mode 100644
index 0000000000..6b12f6666e
--- /dev/null
+++ b/branches/sca-java-2.0-M4/modules/implementation-bpel/src/main/java/org/apache/tuscany/sca/implementation/bpel/xml/BPELDocumentProcessor.java
@@ -0,0 +1,354 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.implementation.bpel.xml;
+
+import static javax.xml.stream.XMLStreamConstants.END_ELEMENT;
+import static javax.xml.stream.XMLStreamConstants.START_ELEMENT;
+
+import java.io.InputStream;
+import java.net.URI;
+import java.net.URL;
+import java.util.Iterator;
+import java.util.List;
+
+import javax.xml.namespace.QName;
+import javax.xml.stream.XMLInputFactory;
+import javax.xml.stream.XMLStreamReader;
+
+import org.apache.tuscany.sca.assembly.AssemblyFactory;
+import org.apache.tuscany.sca.assembly.Property;
+import org.apache.tuscany.sca.contribution.processor.BaseStAXArtifactProcessor;
+import org.apache.tuscany.sca.contribution.processor.ContributionReadException;
+import org.apache.tuscany.sca.contribution.processor.ContributionResolveException;
+import org.apache.tuscany.sca.contribution.processor.ProcessorContext;
+import org.apache.tuscany.sca.contribution.processor.URLArtifactProcessor;
+import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
+import org.apache.tuscany.sca.core.FactoryExtensionPoint;
+import org.apache.tuscany.sca.implementation.bpel.BPELFactory;
+import org.apache.tuscany.sca.implementation.bpel.BPELProcessDefinition;
+import org.apache.tuscany.sca.interfacedef.wsdl.WSDLFactory;
+import org.apache.tuscany.sca.monitor.Monitor;
+import org.apache.tuscany.sca.monitor.Problem;
+import org.apache.tuscany.sca.monitor.Problem.Severity;
+
+/**
+ * BPEL document processor responsible for reading a BPEL file and producing necessary model info about it
+ * 
+ * Handles both BPEL 1.1 documents and BPEL 2.0 documents
+ * @version $Rev$ $Date$
+ */
+public class BPELDocumentProcessor extends BaseStAXArtifactProcessor implements URLArtifactProcessor<BPELProcessDefinition> {
+    
+    private final static XMLInputFactory inputFactory = XMLInputFactory.newInstance();
+    
+    private final BPELFactory factory;
+    private WSDLFactory WSDLfactory;
+    private AssemblyFactory assemblyFactory;
+
+    public BPELDocumentProcessor(FactoryExtensionPoint modelFactories) {
+        this.factory = modelFactories.getFactory(BPELFactory.class);
+        this.WSDLfactory = modelFactories.getFactory(WSDLFactory.class);
+        this.assemblyFactory = modelFactories.getFactory(AssemblyFactory.class);
+    }
+    
+    public String getArtifactType() {
+        return "*.bpel";
+    }    
+
+    public Class<BPELProcessDefinition> getModelType() {
+        return BPELProcessDefinition.class;
+    }
+
+    /** 
+     * Read the BPEL Process definition file from the location identified by an artifact URL
+     * @param contributionURL	- URL of the Contribution containing the Process definition
+     * @param artifactURI		- URI of the artifact containing the BPEL Process definition
+     * @param artifactURL		- URL of the artifact containing the BPEL Process definition
+     * @return BPELProcessDefinition - SCA model of the BPEL Process
+     */
+    public BPELProcessDefinition read(URL contributionURL, URI artifactURI, URL artifactURL, ProcessorContext context) throws ContributionReadException {
+        BPELProcessDefinition processDefinition = null;
+        try {
+            processDefinition = readProcessDefinition(artifactURL, context.getMonitor());
+            processDefinition.setURI(artifactURI.toString());
+            processDefinition.setUnresolved(true);
+        } catch (Exception e) {
+            ContributionReadException ce = new ContributionReadException(e);
+            error(context.getMonitor(), "ContributionReadException", artifactURL, ce);
+        }
+
+        return processDefinition;
+    }
+
+    public void resolve(BPELProcessDefinition model, ModelResolver resolver, ProcessorContext context) throws ContributionResolveException {
+    	// Delegate resolving to model resolver
+    	if (model != null || model.isUnresolved()) {
+    		resolver.resolveModel(BPELProcessDefinition.class, model, context);
+    	}
+    	
+    } // end resolve
+
+    /**
+     * Read a process definition.
+     * 
+     * @param doc
+     * @return
+     * @throws Exception
+     */
+    private BPELProcessDefinition readProcessDefinition(URL doc, Monitor monitor) throws Exception {
+        BPELProcessDefinition processDefinition = factory.createBPELProcessDefinition();
+        processDefinition.setUnresolved(true);
+        processDefinition.setLocation(doc.toString());
+
+        InputStream is = doc.openStream();
+        XMLStreamReader reader = null;
+        try {
+            reader = inputFactory.createXMLStreamReader(is);
+
+            /*
+             * The principle here is to look for partnerLink elements, which
+             * form either services or references. A partnerLink can be EITHER -
+             * the algorithm for deciding is: 
+             * 1) Explicit marking with sca:reference or sca:service attribute 
+             * 2) "first use" of the partnerLink by specific BPEL activity elements: 
+             *    <onEvent../>, <receive../> or <pick../> elements imply a service 
+             *    <invoke../> implies a reference
+             */
+
+            // TODO - need to handle <scope../> elements as kind of "nested" processes
+            // - and scopes introduce the possibility of partnerLinks with the
+            // same name at different levels of scope.... (yuk!!)
+            boolean completed = false;
+            while (!completed) {
+                switch (reader.next()) {
+                    case START_ELEMENT:
+                        QName qname = reader.getName();
+                        if (BPELProcessorConstants.PROCESS_ELEMENT.equals(qname) || BPELProcessorConstants.PROCESS_ELEMENT_20.equals(qname)) {
+                            QName processName = new QName(getString(reader, BPELProcessorConstants.TARGET_NAMESPACE), getString(reader, BPELProcessorConstants.NAME_ELEMENT));
+                            processDefinition.setName(processName);
+                        } else if (BPELProcessorConstants.PARTNERLINK_ELEMENT.equals(qname) || BPELProcessorConstants.PARTNERLINK_ELEMENT_20.equals(qname)) {
+                            processDefinition.getPartnerLinks().add(processPartnerLinkElement(reader, monitor));
+                        } else if (BPELProcessorConstants.ONEVENT_ELEMENT.equals(qname) || BPELProcessorConstants.RECEIVE_ELEMENT.equals(qname) || BPELProcessorConstants.ONMESSAGE_ELEMENT.equals(qname) || 
+                        		BPELProcessorConstants.ONEVENT_ELEMENT_20.equals(qname) || BPELProcessorConstants.RECEIVE_ELEMENT_20.equals(qname) || BPELProcessorConstants.ONMESSAGE_ELEMENT_20.equals(qname)) {
+                            processPartnerLinkAsService(reader.getAttributeValue(null, "partnerLink"), processDefinition.getPartnerLinks(), monitor);
+                        } else if (BPELProcessorConstants.INVOKE_ELEMENT.equals(qname) || BPELProcessorConstants.INVOKE_ELEMENT_20.equals(qname)) {
+                            processPartnerLinkAsReference(reader.getAttributeValue(null, "partnerLink"), processDefinition.getPartnerLinks(), monitor);
+                        } else if (BPELProcessorConstants.IMPORT_ELEMENT.equals(qname) || BPELProcessorConstants.IMPORT_ELEMENT_20.equals(qname)) {
+                            processDefinition.getImports().add(processImportElement(reader));
+                        } else if (BPELProcessorConstants.VARIABLE_ELEMENT.equals(qname) || BPELProcessorConstants.VARIABLE_ELEMENT_20.equals(qname)) {
+                        	// deal with variables that are SCA properties through the presence of a sca-bpel:property="yes" attribute
+                        	Property aProperty = processVariableElement(reader);
+                        	if( aProperty != null ) {
+                        		processDefinition.getProperties().add( aProperty );
+                        	} // end if
+                        } // end if
+                        break;
+                    case END_ELEMENT:
+                    	qname = reader.getName();
+                    	if (BPELProcessorConstants.PROCESS_ELEMENT.equals(qname) || BPELProcessorConstants.PROCESS_ELEMENT_20.equals(qname)) {
+                            completed = true;
+                            break;
+                        } // end if
+                } // end switch
+            } // end while
+        } finally {
+            if (reader != null)
+                reader.close();
+            is.close();
+        } // end try
+
+        return processDefinition;
+    } // end readProcessDefinition
+    
+    /**
+     * Processes a BPEL <variable/> element and creates an SCA <property/> element if the variable is
+     * marked with sca-bpel:property="yes"
+     * A BPEL <variable/> element can declare its type in one of 3 ways:
+     * 1. using @type attribute, which must reference an XSD declared type
+     * 2. using @element attribute, which must reference an XSD global element
+     * 3. using @message attribute, which must reference a WSDL defined message type
+     * @param reader - XMLStreamReader reading the BPEL process
+     * @throws ContributionReadException
+     */
+    private Property processVariableElement( XMLStreamReader reader) throws ContributionReadException {
+    	String scaProperty = reader.getAttributeValue(BPELProcessorConstants.SCA_BPEL_NS, "property");
+    	if( "yes".equals(scaProperty)) {
+    		String varName = reader.getAttributeValue(null ,"name");
+    		String varType = reader.getAttributeValue(null, "type");
+    		String varElement = reader.getAttributeValue(null, "element");
+    		String varMessage = reader.getAttributeValue(null, "message");
+    		// Pass over this variable if there is no name, or if there is no type information
+    		if( varName == null ) return null;
+    		if( varType == null && varElement == null && varMessage == null ) return null;
+    		QName typeQName = getQNameValue( reader, varType );
+    		QName elementQName = getQNameValue( reader, varElement );
+    		// TODO deal with properties declared with @message for typing
+    		Property theProperty = assemblyFactory.createProperty();
+    		theProperty.setName(varName);
+    		theProperty.setXSDType(typeQName);
+    		theProperty.setXSDElement(elementQName);
+    		return theProperty;
+    	} // end if
+    	return null;
+    	
+    } // end processVariableElement
+    
+    /**
+     * Processes a partnerLink element from the BPEL process and creates a
+     * BPELPartnerLink object
+     * 
+     * @param reader
+     */
+    private BPELPartnerLinkElement processPartnerLinkElement(XMLStreamReader reader, Monitor monitor) throws ContributionReadException {
+        BPELPartnerLinkElement partnerLink = new BPELPartnerLinkElement( reader.getAttributeValue(null, "name"),
+                                                                         getQNameValue(reader, reader.getAttributeValue(null, "partnerLinkType")),
+                                                                         reader.getAttributeValue(null, "myRole"),
+                                                                         reader.getAttributeValue(null, "partnerRole"));
+        
+        // See if there are any SCA extension attributes
+        String scaService = reader.getAttributeValue(BPELProcessorConstants.SCA_BPEL_NS, "service");
+        String scaReference = reader.getAttributeValue(BPELProcessorConstants.SCA_BPEL_NS, "reference");
+        if ((scaService != null) && (scaReference != null)) {
+            // It is incorrect to set both service & reference attributes
+            error(monitor, "PartnerLinkHasBothAttr", partnerLink, reader.getAttributeValue(null, "name"));
+            throw new ContributionReadException("BPEL PartnerLink " + reader.getAttributeValue(null, "name") + " has both sca:reference and sca:service attributes set");
+        }
+        
+        // Set the SCA type and the related name, if present
+        if (scaService != null)
+            partnerLink.setAsService(scaService);
+        else if (scaReference != null)
+            partnerLink.setAsReference(scaReference);
+        return partnerLink;
+        
+    } // end processPartnerLinkElement
+
+    /**
+     * Processes an <import../> element from the BPEL process and creates a
+     * BPELImportElement object
+     * 
+     * @param reader
+     */
+    private BPELImportElement processImportElement(XMLStreamReader reader) {
+        return (new BPELImportElement(reader.getAttributeValue(null, "location"),
+                                      reader.getAttributeValue(null, "importType"),
+                                      reader.getAttributeValue(null, "namespace")));
+        
+    } // end processImportElement
+
+    /**
+     * Mark a named partnerLink as a Service, unless it is already marked as a
+     * Reference
+     * 
+     * @param partnerLinkName
+     * @param partnerLinks
+     */
+    private void processPartnerLinkAsService(String partnerLinkName, List<BPELPartnerLinkElement> partnerLinks, Monitor monitor) {
+        BPELPartnerLinkElement partnerLink = findPartnerLinkByName(partnerLinks, partnerLinkName);
+        if (partnerLink == null) {
+            warning(monitor, "ReferencePartnerLinkNotInList", partnerLinkName, partnerLinkName);
+        } else {
+            // Set the type of the partnerLink to "service" if not already
+            // set...
+            if (!partnerLink.isSCATyped())
+                partnerLink.setAsService(partnerLinkName);
+        } // endif
+    } // end processPartnerLinkAsReference
+
+    /**
+     * Mark a named partnerLink as a Reference, unless it is already marked as a
+     * Service
+     * 
+     * @param partnerLinkName
+     * @param partnerLinks
+     */
+    private void processPartnerLinkAsReference(String partnerLinkName, List<BPELPartnerLinkElement> partnerLinks, Monitor monitor) {
+        BPELPartnerLinkElement partnerLink = findPartnerLinkByName(partnerLinks, partnerLinkName);
+        if (partnerLink == null) {
+            warning(monitor, "ReferencePartnerLinkNotInList", partnerLinkName, partnerLinkName);
+        } else {
+            // Set the type of the partnerLink to "service" if not already
+            // set...
+            if (!partnerLink.isSCATyped())
+                partnerLink.setAsReference(partnerLinkName);
+        } // endif
+    } // end processPartnerLinkAsReference
+
+    /**
+     * Finds a PartnerLink by name from a List of PartnerLinks returns null if
+     * there is no partnerLink with a matching name - returns the PartnerLink
+     * with a matching name
+     * 
+     * @param partnerLinks
+     * @param partnerLinkName
+     */
+    private BPELPartnerLinkElement findPartnerLinkByName(List<BPELPartnerLinkElement> partnerLinks, String partnerLinkName) {
+        // Scan the list looking for a partner link with the supplied name
+        Iterator<BPELPartnerLinkElement> it = partnerLinks.iterator();
+        while (it.hasNext()) {
+            BPELPartnerLinkElement thePartnerLink = it.next();
+            if (thePartnerLink.getName().equals(partnerLinkName))
+                return thePartnerLink;
+        }
+        return null;
+    } // end method findPartnerLinkByName
+
+    /**
+     * Report a warning.
+     * 
+     * @param problems
+     * @param message
+     * @param model
+     */
+    private void warning(Monitor monitor, String message, Object model, Object... messageParameters) {
+        if (monitor != null) {
+            Problem problem = monitor.createProblem(this.getClass().getName(), "impl-bpel-validation-messages", Severity.WARNING, model, message, (Object[])messageParameters);
+            monitor.problem(problem);
+        }
+    }
+
+    /**
+     * Report a error.
+     * 
+     * @param problems
+     * @param message
+     * @param model
+     */
+    private void error(Monitor monitor, String message, Object model, Object... messageParameters) {
+        if (monitor != null) {
+            Problem problem = monitor.createProblem(this.getClass().getName(), "impl-bpel-validation-messages", Severity.ERROR, model, message, (Object[])messageParameters);
+            monitor.problem(problem);
+        }
+    }
+
+    /**
+     * Report a exception.
+     * 
+     * @param problems
+     * @param message
+     * @param model
+     */
+    private void error(Monitor monitor, String message, Object model, Exception ex) {
+        if (monitor != null) {
+            Problem problem = monitor.createProblem(this.getClass().getName(), "impl-bpel-validation-messages", Severity.ERROR, model, message, ex);
+            monitor.problem(problem);
+        }
+    }
+}
diff --git a/branches/sca-java-2.0-M4/modules/implementation-bpel/src/main/java/org/apache/tuscany/sca/implementation/bpel/xml/BPELImplementationProcessor.java b/branches/sca-java-2.0-M4/modules/implementation-bpel/src/main/java/org/apache/tuscany/sca/implementation/bpel/xml/BPELImplementationProcessor.java
new file mode 100644
index 0000000000..6a2d6310c0
--- /dev/null
+++ b/branches/sca-java-2.0-M4/modules/implementation-bpel/src/main/java/org/apache/tuscany/sca/implementation/bpel/xml/BPELImplementationProcessor.java
@@ -0,0 +1,452 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.implementation.bpel.xml;
+
+import static javax.xml.stream.XMLStreamConstants.END_ELEMENT;
+
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.util.Collection;
+import java.util.List;
+
+import javax.wsdl.PortType;
+import javax.xml.namespace.QName;
+import javax.xml.stream.XMLStreamException;
+import javax.xml.stream.XMLStreamReader;
+import javax.xml.stream.XMLStreamWriter;
+
+import org.apache.tuscany.sca.assembly.AssemblyFactory;
+import org.apache.tuscany.sca.assembly.ComponentType;
+import org.apache.tuscany.sca.assembly.Multiplicity;
+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.contribution.processor.BaseStAXArtifactProcessor;
+import org.apache.tuscany.sca.contribution.processor.ContributionReadException;
+import org.apache.tuscany.sca.contribution.processor.ContributionResolveException;
+import org.apache.tuscany.sca.contribution.processor.ContributionWriteException;
+import org.apache.tuscany.sca.contribution.processor.ProcessorContext;
+import org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor;
+import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
+import org.apache.tuscany.sca.core.FactoryExtensionPoint;
+import org.apache.tuscany.sca.implementation.bpel.BPELFactory;
+import org.apache.tuscany.sca.implementation.bpel.BPELImplementation;
+import org.apache.tuscany.sca.implementation.bpel.BPELProcessDefinition;
+import org.apache.tuscany.sca.interfacedef.wsdl.WSDLDefinition;
+import org.apache.tuscany.sca.interfacedef.wsdl.WSDLFactory;
+import org.apache.tuscany.sca.interfacedef.wsdl.WSDLInterface;
+import org.apache.tuscany.sca.interfacedef.wsdl.WSDLInterfaceContract;
+import org.apache.tuscany.sca.monitor.Monitor;
+import org.apache.tuscany.sca.monitor.Problem;
+import org.apache.tuscany.sca.monitor.Problem.Severity;
+
+/**
+ * Implements a StAX artifact processor for BPEL implementations.
+ * 
+ * The artifact processor is responsible for processing <implementation.bpel>
+ * elements in SCA assembly XML composite files and populating the BPEL
+ * implementation model, resolving its references to other artifacts in the SCA
+ * contribution, and optionally write the model back to SCA assembly XML.
+ * 
+ *  @version $Rev$ $Date$
+ */
+public class BPELImplementationProcessor extends BaseStAXArtifactProcessor implements StAXArtifactProcessor<BPELImplementation> {
+    private static final String SCA11_NS = "http://docs.oasis-open.org/ns/opencsa/sca/200903";
+    private static final String PROCESS = "process";
+    private static final String IMPLEMENTATION_BPEL = "implementation.bpel";
+    private static final QName IMPLEMENTATION_BPEL_QNAME = new QName(SCA11_NS, IMPLEMENTATION_BPEL);
+    
+    private AssemblyFactory assemblyFactory;
+    private BPELFactory bpelFactory;
+    private WSDLFactory wsdlFactory;
+    
+    
+    public BPELImplementationProcessor(FactoryExtensionPoint modelFactories) {
+        this.assemblyFactory = modelFactories.getFactory(AssemblyFactory.class);
+        this.wsdlFactory = modelFactories.getFactory(WSDLFactory.class);
+        this.bpelFactory = modelFactories.getFactory(BPELFactory.class);
+    }
+
+    public QName getArtifactType() {
+        // Returns the QName of the XML element processed by this processor
+        return IMPLEMENTATION_BPEL_QNAME;
+    }
+
+    public Class<BPELImplementation> getModelType() {
+        // Returns the type of model processed by this processor
+        return BPELImplementation.class;
+    }
+
+    public BPELImplementation read(XMLStreamReader reader, ProcessorContext context) throws ContributionReadException, XMLStreamException {
+        assert IMPLEMENTATION_BPEL_QNAME.equals(reader.getName());
+        
+        // Read an <implementation.bpel> element
+        BPELImplementation implementation = null;
+        
+        // Read the process attribute. 
+        QName process = getAttributeValueNS(reader, PROCESS, context.getMonitor());
+        if (process == null) {
+        	return implementation;
+        }
+
+        // Create and initialize the BPEL implementation model
+        implementation = bpelFactory.createBPELImplementation();
+        implementation.setProcess(process);
+        implementation.setUnresolved(true);
+        
+        // Skip to end element
+        while (reader.hasNext()) {
+            if (reader.next() == END_ELEMENT && IMPLEMENTATION_BPEL_QNAME.equals(reader.getName())) {
+                break;
+            }
+        }
+        
+        return implementation;
+    }
+
+    public void resolve(BPELImplementation implementation, ModelResolver resolver, ProcessorContext context) throws ContributionResolveException {
+        
+    	if( implementation != null && implementation.isUnresolved()) 
+    	{
+    	    implementation.setModelResolver(resolver);
+    	    
+            BPELProcessDefinition processDefinition = resolveBPELProcessDefinition(implementation, resolver, context);
+            //resolveBPELImports(processDefinition, resolver);
+            if(processDefinition.isUnresolved()) {
+            	error(context.getMonitor(), "BPELProcessNotFound", implementation, processDefinition.getName());
+            } else {            
+                implementation.setProcessDefinition(processDefinition);
+            
+                // Get the component type from the process definition
+                generateComponentType( implementation, context.getMonitor() );
+                        
+                //set current implementation resolved 
+                implementation.setUnresolved(false);
+            }
+        }
+        
+    } // end resolve
+
+    public void write( BPELImplementation bpelImplementation, 
+    		           XMLStreamWriter writer, ProcessorContext context ) throws ContributionWriteException, XMLStreamException {
+        //FIXME Deal with policy processing...
+        // Write <implementation.bpel process="..."/>
+        // policyProcessor.writePolicyPrefixes(bpelImplementation, writer);
+        writer.writeStartElement(SCA11_NS, IMPLEMENTATION_BPEL);
+        // policyProcessor.writePolicyAttributes(bpelImplementation, writer);
+        
+        if (bpelImplementation.getProcess() != null) {
+            writer.writeAttribute(PROCESS, bpelImplementation.getProcess().toString() );
+        }
+
+        writer.writeEndElement();
+
+    } // end write
+
+    private BPELProcessDefinition resolveBPELProcessDefinition(BPELImplementation impl, ModelResolver resolver, ProcessorContext context) throws ContributionResolveException {
+        QName processName = impl.getProcess();
+        BPELProcessDefinition processDefinition = this.bpelFactory.createBPELProcessDefinition();
+        processDefinition.setName(processName);
+        processDefinition.setUnresolved(true);
+        
+        return resolver.resolveModel(BPELProcessDefinition.class, processDefinition, context);
+    } // end resolveBPELProcessDefinition
+    
+    private void resolveBPELImports(BPELProcessDefinition processDefinition, ModelResolver resolver, ProcessorContext context) throws ContributionResolveException {
+    	for (BPELImportElement bpelImport : processDefinition.getImports()) {
+    		String namespace = bpelImport.getNamespace();
+    		String location = bpelImport.getLocation();
+    		
+    		WSDLDefinition wsdl = bpelImport.getWSDLDefinition();
+    		if (wsdl == null) {
+        			try {
+        				wsdl = wsdlFactory.createWSDLDefinition();
+        				wsdl.setUnresolved(true);
+        				wsdl.setNamespace(bpelImport.getNamespace());
+						wsdl.setLocation(new URI(null, bpelImport.getLocation(), null));
+						wsdl = resolver.resolveModel(WSDLDefinition.class, wsdl, context);
+						
+						if(! wsdl.isUnresolved()) {
+							bpelImport.setWSDLDefinition(wsdl);
+						} else {
+							//error("BPELProcessNotFound", implementation, processDefinition.getName());
+						}
+					} catch (URISyntaxException e) {
+						// TODO Auto-generated catch block
+						e.printStackTrace();
+					}
+
+    		}
+    		
+    	}
+    }
+
+    
+    /**
+     * Calculates the component type of the supplied implementation and attaches it to the
+     * implementation.
+     * 
+     * @param impl
+     * @throws ContributionResolveException
+     */
+    private void generateComponentType(BPELImplementation impl, Monitor monitor) throws ContributionResolveException {
+
+        // Create a ComponentType and mark it unresolved
+        ComponentType componentType = assemblyFactory.createComponentType();
+        componentType.setUnresolved(true);
+        impl.setComponentType(componentType);
+
+        // Each partner link in the process represents either a service or a reference
+        // - or both, in the sense of involving a callback
+        BPELProcessDefinition theProcess = impl.getProcessDefinition();
+        List<BPELPartnerLinkElement> partnerLinks = theProcess.getPartnerLinks();
+
+        for (BPELPartnerLinkElement pLink : partnerLinks) {
+
+            // check that the partner link has been designated as service or
+            // reference in SCA terms
+            if (pLink.isSCATyped()) {
+                String scaName = pLink.getSCAName();
+                if (pLink.querySCAType().equals("reference")) {
+                    componentType.getReferences().add(generateReference(scaName, pLink.getMyRolePortType(), pLink.getPartnerRolePortType(), theProcess.getInterfaces(), monitor));
+                } else {
+                    componentType.getServices().add(generateService(scaName, pLink.getMyRolePortType(), pLink.getPartnerRolePortType(), theProcess.getInterfaces(), monitor));
+                } // end if
+            } // end if
+        } // end for
+        
+        // Each SCA Property in the process becomes a Property in the ComponentType
+        for( Property property : theProcess.getProperties() ) {
+        	componentType.getProperties().add(property);
+        } // end for
+
+    } // end getComponentType
+    
+    /**
+     * Create an SCA reference for a partnerLink
+     * @param name - name of the reference
+     * @param myRolePT - partner link type of myRole
+     * @param partnerRolePT - partner link type of partnerRole
+     * @param theInterfaces - list of WSDL interfaces associated with the BPEL process
+     * @return
+     */
+    private Reference generateReference( String name, PortType myRolePT, 
+    		PortType partnerRolePT, Collection<WSDLInterface> theInterfaces, Monitor monitor) throws ContributionResolveException {
+        
+        Reference reference = assemblyFactory.createReference();
+        WSDLInterfaceContract interfaceContract = wsdlFactory.createWSDLInterfaceContract();
+        reference.setInterfaceContract(interfaceContract);
+
+        // Establish whether there is just a call interface or a call + callback interface
+        PortType callPT = null;
+        PortType callbackPT = null;
+        if (partnerRolePT != null) {
+            callPT = partnerRolePT;
+            // If the 2 port types are not the same one, there is a callback...
+            if (myRolePT != null) {
+                if (!myRolePT.getQName().equals(partnerRolePT.getQName())) {
+                    callbackPT = myRolePT;
+                } // end if
+            } // end if
+        } else if (myRolePT != null) {
+            callPT = myRolePT;
+        } // end if
+
+        // No interfaces mean an error
+        if (callPT == null && callbackPT == null) {
+            error(monitor, "MyRolePartnerRoleNull", theInterfaces);
+        } // end if
+
+        // Set the name of the reference to the supplied name and the
+        // multiplicity of the reference to 1..1
+        // TODO: support other multiplicities
+        reference.setName(name);
+        reference.setMultiplicity(Multiplicity.ONE_ONE);
+
+        if (callPT != null) {
+            // Set the call interface and, if present, the callback interface
+            WSDLInterface callInterface = null;
+            for (WSDLInterface anInterface : theInterfaces) {
+                if (anInterface.getPortType().getQName().equals(callPT.getQName()))
+                    callInterface = anInterface;
+            } // end for
+            if (callInterface == null) {
+                error(monitor, "NoInterfaceForPortType", theInterfaces, callPT.getQName().toString());
+            } else
+                reference.getInterfaceContract().setInterface(callInterface);
+        } // end if
+
+        // There is a callback if the partner role is not null and if the
+        // partner role port type is not the same as the port type for my role
+        if (callbackPT != null) {
+            WSDLInterface callbackInterface = null;
+            for (WSDLInterface anInterface : theInterfaces) {
+                if (anInterface.getPortType().getQName().equals(callbackPT.getQName()))
+                    callbackInterface = anInterface;
+            } // end for
+            if (callbackInterface == null) {
+                error(monitor, "NoInterfaceForPortType", theInterfaces, callbackPT.getQName().toString());
+            } else
+                reference.getInterfaceContract().setCallbackInterface(callbackInterface);
+        } // end if
+
+        return reference;
+    } // end generateReference
+    
+    /**
+     * Create an SCA service for a partnerLink
+     * @param name - name of the reference
+     * @param myRolePT - partner link type of myRole
+     * @param partnerRolePT - partner link type of partnerRole
+     * @param theInterfaces - list of WSDL interfaces associated with the BPEL process
+     * @return
+     */
+    private Service generateService( String name, PortType myRolePT, 
+    		PortType partnerRolePT, Collection<WSDLInterface> theInterfaces, Monitor monitor ) 
+    		throws ContributionResolveException {
+        Service service = assemblyFactory.createService();
+        WSDLInterfaceContract interfaceContract = wsdlFactory.createWSDLInterfaceContract();
+        service.setInterfaceContract(interfaceContract);
+
+        // Set the name of the service to the supplied name
+        service.setName(name);
+
+        // Establish whether there is just a call interface or a call + callback
+        // interface
+        PortType callPT = null;
+        PortType callbackPT = null;
+        if (myRolePT != null) {
+            callPT = myRolePT;
+            // If the 2 port types are not the same one, there is a callback...
+            if (partnerRolePT != null) {
+                if (!myRolePT.getQName().equals(partnerRolePT.getQName())) {
+                    callbackPT = partnerRolePT;
+                } // end if
+            } // end if
+        } else if (partnerRolePT != null) {
+            callPT = partnerRolePT;
+        } // end if
+
+        // No interfaces mean an error
+        if (callPT == null && callbackPT == null) {
+            error(monitor, "MyRolePartnerRoleNull", theInterfaces);
+        } // end if
+
+        if (callPT != null) {
+            // Set the call interface and, if present, the callback interface
+            WSDLInterface callInterface = null;
+            for (WSDLInterface anInterface : theInterfaces) {
+                if (anInterface.getPortType().getQName().equals(callPT.getQName()))
+                    callInterface = anInterface;
+            } // end for
+            if (callInterface == null) {
+                error(monitor, "NoInterfaceForPortType", theInterfaces, callPT.getQName().toString());
+            } else
+                service.getInterfaceContract().setInterface(callInterface);
+        } // end if
+
+        // There is a callback if the partner role is not null and if the
+        // partner role port type is not the same as the port type for my role
+        if (callbackPT != null) {
+            WSDLInterface callbackInterface = null;
+            for (WSDLInterface anInterface : theInterfaces) {
+                if (anInterface.getPortType().getQName().equals(callbackPT.getQName()))
+                    callbackInterface = anInterface;
+            } // end for
+            if (callbackInterface == null) {
+                error(monitor, "NoInterfaceForPortType", theInterfaces, callbackPT.getQName().toString());
+            } else
+                service.getInterfaceContract().setCallbackInterface(callbackInterface);
+        } // end if
+
+        return service;
+    } // end generateService
+    
+    /**
+     * Returns a QName from its string representation in a named attribute of an XML element
+     * supplied in an XMLStreamReader
+     * 
+     * QName attributes of an XML element (such as  BPEL process) is presented in one of
+     * two alternative formats:
+     * 1) In the form of a local name with a prefix, with the prefix referencing a namespace
+     * URI declaration elsewhere in the composite (typically on the composite element)
+     * 
+     * ie:   nms:SomeName
+     *       xmlns:nms="http://example.com/somenamespace"
+     *       
+     * 2) In the XML Namespaces recommendation format (see http://jclark.com/xml/xmlns.htm )
+     * where the namespace URI and the local name are encoded into a single string, with the 
+     * namespace URI enclosed between a pair of braces {...}
+     * 
+     *  ie:  {http://example.com/somenamespace}SomeName
+     */
+    private QName getAttributeValueNS(XMLStreamReader reader, String attribute, Monitor monitor) {
+        String fullValue = reader.getAttributeValue(null, attribute);
+        if (fullValue == null) {
+            error(monitor, "AttributeProcessMissing", reader);
+            return null;
+        }
+
+        // Deal with the attribute in the XML Namespaces recommendation format
+        // - trim off any leading/trailing spaces and check that the first
+        // character is '{'
+        if (fullValue.trim().charAt(0) == '{') {
+            try {
+                // Attempt conversion to a QName object
+                QName theProcess = QName.valueOf(fullValue);
+                return theProcess;
+            } catch (IllegalArgumentException e) {
+                // This exception happens if the attribute begins with '{' but
+                // doesn't conform
+                // to the XML Namespaces recommendation format
+                error(monitor, "AttributeWithoutNamespace", reader, attribute, fullValue);
+                return null;
+            }
+        } // endif
+
+        // Deal with the attribute in the local name + prefix format
+        if (fullValue.indexOf(":") < 0) {
+            error(monitor, "AttributeWithoutPrefix", reader, attribute, fullValue);
+            return null;
+        }
+        String prefix = fullValue.substring(0, fullValue.indexOf(":"));
+        String name = fullValue.substring(fullValue.indexOf(":") + 1);
+        String nsUri = reader.getNamespaceContext().getNamespaceURI(prefix);
+        if (nsUri == null) {
+            error(monitor, "AttributeUnrecognizedNamespace", reader, attribute, fullValue);
+            return null;
+        }
+        return new QName(nsUri, name, prefix);
+    }
+
+    /**
+     * Report a error.
+     * 
+     * @param problems
+     * @param message
+     * @param model
+     */
+    private void error(Monitor monitor, String message, Object model, Object... messageParameters) {
+         if (monitor != null) {
+                Problem problem = monitor.createProblem(this.getClass().getName(), "impl-bpel-validation-messages", Severity.ERROR, model, message, (Object[])messageParameters);
+                monitor.problem(problem);
+         }
+    }
+     
+}
diff --git a/branches/sca-java-2.0-M4/modules/implementation-bpel/src/main/java/org/apache/tuscany/sca/implementation/bpel/xml/BPELImportElement.java b/branches/sca-java-2.0-M4/modules/implementation-bpel/src/main/java/org/apache/tuscany/sca/implementation/bpel/xml/BPELImportElement.java
new file mode 100644
index 0000000000..959d1ec5d5
--- /dev/null
+++ b/branches/sca-java-2.0-M4/modules/implementation-bpel/src/main/java/org/apache/tuscany/sca/implementation/bpel/xml/BPELImportElement.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.implementation.bpel.xml;
+
+import org.apache.tuscany.sca.interfacedef.wsdl.WSDLDefinition;
+
+/**
+ * Represents an <import.../> element in a BPEL process
+ * - this has attributes:
+ *      location
+ *      importType
+ *      namespace
+ *
+ * @version $Rev$ $Date$
+ */
+public class BPELImportElement {
+	
+    private String location;
+    private String importType;
+    private String namespace;
+    private WSDLDefinition theWSDL = null;
+
+    public BPELImportElement(String location, String importType, String namespace) {
+        this.location = location;
+        this.importType = importType;
+        this.namespace = namespace;
+    }
+
+    public String getImportType() {
+        return importType;
+    }
+
+    public String getLocation() {
+        return location;
+    }
+
+    public String getNamespace() {
+        return namespace;
+    }
+
+    public void setWSDLDefinition(WSDLDefinition theDefinition) {
+        theWSDL = theDefinition;
+    }
+
+    public WSDLDefinition getWSDLDefinition() {
+        return theWSDL;
+    }
+
+} // end class BPELImportElement
diff --git a/branches/sca-java-2.0-M4/modules/implementation-bpel/src/main/java/org/apache/tuscany/sca/implementation/bpel/xml/BPELPartnerLinkElement.java b/branches/sca-java-2.0-M4/modules/implementation-bpel/src/main/java/org/apache/tuscany/sca/implementation/bpel/xml/BPELPartnerLinkElement.java
new file mode 100644
index 0000000000..ea645e1304
--- /dev/null
+++ b/branches/sca-java-2.0-M4/modules/implementation-bpel/src/main/java/org/apache/tuscany/sca/implementation/bpel/xml/BPELPartnerLinkElement.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.implementation.bpel.xml;
+
+import javax.wsdl.PortType;
+import javax.xml.namespace.QName;
+
+/**
+ * Represents a <partnerLink.../> element in a BPEL process
+ * - this has attributes:
+ *      name
+ *      partnerLinkType
+ *      myRole
+ *      partnerRole
+ * - plus zero or more property elements as children
+ * 
+ * The partnerlink may also be given an SCA Type - either of service or of reference - this must
+ * generally be calculated and set on the partnerLink by inspecting the BPEL process
+ *
+ * @version $Rev$ $Date$
+ */
+public class BPELPartnerLinkElement {
+
+    private String 	REFERENCE_TYPE = "reference";
+    private String 	SERVICE_TYPE = "service";
+    private String 	name;
+    private QName	partnerLinkType;
+    private BPELPartnerLinkTypeElement 	pLinkType = null;
+    private String 	myRole;
+    private String 	partnerRole;
+    private String 	scaName;			// Holds the SCA reference or service name
+    private String 	scaType = null; 	// Holds the SCA type = null | service | reference
+    
+    public BPELPartnerLinkElement(String name, 
+    							  QName partnerLinkType,
+    							  String myRole, 
+    							  String partnerRole ) {
+        this.name = name;
+        this.partnerLinkType = partnerLinkType;
+        this.myRole = myRole;
+        this.partnerRole = partnerRole;
+        
+        scaName = null;
+    }
+
+    public QName getPartnerLinkType() {
+        return partnerLinkType;
+    }
+    
+    public void setPartnerLinkType( BPELPartnerLinkTypeElement pLinkType ) {
+    	this.pLinkType = pLinkType;
+    }
+    
+    
+    public PortType getMyRolePortType() {
+    	return getRolePortType( myRole );
+    }
+    
+    public PortType getPartnerRolePortType() {
+    	return getRolePortType( partnerRole );
+    }
+    
+    private PortType getRolePortType( String theRole ) {
+    	if (theRole == null || theRole.length() == 0) {
+            return null;
+        } // end if
+    	if( pLinkType == null ) {
+    		throw new IllegalStateException("BPELPartnerLinkElement: " + this.name + " has no Partner Link type object set");
+    	} // end if 
+        if (theRole.equals(pLinkType.getRole1Name())) {
+            return pLinkType.getRole1pType();
+        } else if (theRole.equals(pLinkType.getRole2Name())) {
+            return pLinkType.getRole2pType();
+        } // end if
+        return null;
+    } // end getRolePortType
+
+    public String getName() {
+        return name;
+    }
+    
+    public String getMyRole() {
+    	return myRole;
+    }
+    
+    public String getPartnerRole() {
+    	return partnerRole;
+    }
+    
+    public void setSCAName( String name ) {
+    	scaName = name;
+    }
+    
+    public String getSCAName() {
+    	return scaName;
+    }
+    
+    public boolean isSCATyped() {
+    	return ( !(scaType == null) );
+    }
+    
+    public void setAsReference( String name ) {
+    	scaType = REFERENCE_TYPE;
+    	scaName = name;
+    }
+    
+    public void setAsService( String name ) {
+    	scaType = SERVICE_TYPE;
+    	scaName = name;
+    }
+    
+    public String querySCAType() {
+    	return scaType;
+    }
+
+} // end class BPELPartnerLinkElement
diff --git a/branches/sca-java-2.0-M4/modules/implementation-bpel/src/main/java/org/apache/tuscany/sca/implementation/bpel/xml/BPELPartnerLinkTypeElement.java b/branches/sca-java-2.0-M4/modules/implementation-bpel/src/main/java/org/apache/tuscany/sca/implementation/bpel/xml/BPELPartnerLinkTypeElement.java
new file mode 100644
index 0000000000..8786837e97
--- /dev/null
+++ b/branches/sca-java-2.0-M4/modules/implementation-bpel/src/main/java/org/apache/tuscany/sca/implementation/bpel/xml/BPELPartnerLinkTypeElement.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.implementation.bpel.xml;
+
+ import javax.wsdl.PortType;
+import javax.wsdl.extensions.ExtensibilityElement;
+import javax.xml.namespace.QName;
+ 
+/**
+ * Represents a <partnerLinkType.../> element related to a BPEL process
+ * - this has attributes:
+ *      name
+ *      Role1 name
+ *      Role1 portType
+ *      Role2 name
+ *         Role2 portType
+ *
+ * - in the XML the 2 roles are child elements of the partnerLinkType element, but there
+ * seems little point in reflecting this back into this model - it is simpler to include
+ * both roles within the representation of the partnerLinkType itself
+ *
+ * @version $Rev$ $Date$
+ */
+public class BPELPartnerLinkTypeElement implements ExtensibilityElement {
+	
+    private QName name;
+    private String Role1name = null;
+    private QName Role1porttype = null;
+    private PortType Role1pType = null;
+    private String Role2name = null;
+    private QName Role2porttype = null;
+    private PortType Role2pType = null;
+    private QName elementType = null;
+    private Boolean required = false;
+
+    public BPELPartnerLinkTypeElement(QName name) {
+        this.name = name;
+    }
+
+    public QName getName() {
+        return name;
+    }
+
+    public void setRole1(String name, QName portType, PortType pType) {
+        Role1name = name;
+        Role1porttype = portType;
+        Role1pType = pType;
+    }
+
+    public void setRole2(String name, QName portType, PortType pType) {
+        Role2name = name;
+        Role2porttype = portType;
+        Role2pType = pType;
+    }
+
+    public String getRole1Name() {
+        return Role1name;
+    }
+
+    public String getRole2Name() {
+        return Role2name;
+    }
+
+    public QName getRole1PortType() {
+        return Role1porttype;
+    }
+
+    public QName getRole2PortType() {
+        return Role2porttype;
+    }
+
+    public PortType getRole1pType() {
+        return Role1pType;
+    }
+
+    public PortType getRole2pType() {
+        return Role2pType;
+    }
+
+    public QName getElementType() {
+        return elementType;
+    }
+
+    public Boolean getRequired() {
+        return required;
+    }
+
+    public void setElementType(QName elementType) {
+        this.elementType = elementType;
+    }
+
+    public void setRequired(java.lang.Boolean required) {
+        this.required = required;
+    }
+    
+    /**
+     * toString method to return a description of this BPELPartnerLinkType useful for debugging
+     */
+    public String toString() {
+    	return "BPELPartnerLinkType: " + name.toString();
+    } // end method toString
+
+} // end BPELPartnerLinkType
diff --git a/branches/sca-java-2.0-M4/modules/implementation-bpel/src/main/java/org/apache/tuscany/sca/implementation/bpel/xml/BPELProcessorConstants.java b/branches/sca-java-2.0-M4/modules/implementation-bpel/src/main/java/org/apache/tuscany/sca/implementation/bpel/xml/BPELProcessorConstants.java
new file mode 100644
index 0000000000..952ba9fe78
--- /dev/null
+++ b/branches/sca-java-2.0-M4/modules/implementation-bpel/src/main/java/org/apache/tuscany/sca/implementation/bpel/xml/BPELProcessorConstants.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.implementation.bpel.xml;
+
+import javax.xml.namespace.QName;
+
+
+/**
+ * BPEL Constants
+ * 
+ * @version $Rev$ $Date$
+ */
+public class BPELProcessorConstants {
+    static final String SCA_BPEL_NS 	= "http://docs.oasis-open.org/ns/opencsa/sca-bpel/200801";
+    static final String WSDL_NS 		= "http://schemas.xmlsoap.org/wsdl/";
+
+    // BPEL 1.1
+    static final String BPEL_NS 		= "http://schemas.xmlsoap.org/ws/2004/03/business-process/";
+    static final String BPEL_PLINK_NS 	= "http://schemas.xmlsoap.org/ws/2004/03/partner-link/";
+    final static String NAME_ELEMENT 		= "name";
+    static final String LINKTYPE_NAME 		= "partnerLinkType";
+    final static String TARGET_NAMESPACE 	= "targetNamespace";
+    static final QName PROCESS_ELEMENT 		= new QName(BPEL_NS, "process");
+    static final QName PARTNERLINK_ELEMENT 	= new QName(BPEL_NS, "partnerLink");
+    static final QName ONEVENT_ELEMENT 		= new QName(BPEL_NS, "onEvent");
+    static final QName RECEIVE_ELEMENT 		= new QName(BPEL_NS, "receive");
+    static final QName ONMESSAGE_ELEMENT 	= new QName(BPEL_NS, "onMessage");
+    static final QName INVOKE_ELEMENT 		= new QName(BPEL_NS, "invoke");
+    static final QName IMPORT_ELEMENT 		= new QName(BPEL_NS, "import");
+    static final QName VARIABLE_ELEMENT		= new QName(BPEL_NS, "variable");
+    static final QName LINKTYPE_ELEMENT 	= new QName(BPEL_PLINK_NS, LINKTYPE_NAME);
+    
+    // BPEL 2.0
+    static final String BPEL_NS_20 			= "http://docs.oasis-open.org/wsbpel/2.0/process/executable";
+    static final String BPEL_PLINK_NS_20	= "http://docs.oasis-open.org/wsbpel/2.0/plnktype";
+    static final QName PROCESS_ELEMENT_20 		= new QName(BPEL_NS_20, "process");
+    static final QName PARTNERLINK_ELEMENT_20 	= new QName(BPEL_NS_20, "partnerLink");
+    static final QName ONEVENT_ELEMENT_20 		= new QName(BPEL_NS_20, "onEvent");
+    static final QName RECEIVE_ELEMENT_20 		= new QName(BPEL_NS_20, "receive");
+    static final QName ONMESSAGE_ELEMENT_20 	= new QName(BPEL_NS_20, "onMessage");
+    static final QName INVOKE_ELEMENT_20 		= new QName(BPEL_NS_20, "invoke");
+    static final QName IMPORT_ELEMENT_20 		= new QName(BPEL_NS_20, "import");   
+    static final QName VARIABLE_ELEMENT_20		= new QName(BPEL_NS_20, "variable");
+    static final QName LINKTYPE_ELEMENT_20 		= new QName(BPEL_PLINK_NS_20, LINKTYPE_NAME);
+}