Creating a branch for the equinox work.

git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@694816 13f79535-47bb-0310-9956-ffa450edef68

20 files changed, 1439 insertions, 0 deletions

diff --git a/branches/sca-equinox/modules/implementation-java-xml/src/main/java/org/apache/tuscany/sca/implementation/java/xml/JavaImplementationConstants.java b/branches/sca-equinox/modules/implementation-java-xml/src/main/java/org/apache/tuscany/sca/implementation/java/xml/JavaImplementationConstants.java
new file mode 100644
index 0000000000..ecbf0c4c78
--- /dev/null
+++ b/branches/sca-equinox/modules/implementation-java-xml/src/main/java/org/apache/tuscany/sca/implementation/java/xml/JavaImplementationConstants.java
@@ -0,0 +1,36 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.implementation.java.xml;
+
+import javax.xml.namespace.QName;
+
+import org.apache.tuscany.sca.assembly.xml.Constants;
+
+/**
+ * Constants for the Java Implementation.
+ *
+ * @version $Rev$ $Date$
+ */
+public interface JavaImplementationConstants {
+
+    String IMPLEMENTATION_JAVA = "implementation.java";
+    QName IMPLEMENTATION_JAVA_QNAME = new QName(Constants.SCA10_NS, "implementation.java");
+    String CLASS = "class";
+
+}
diff --git a/branches/sca-equinox/modules/implementation-java-xml/src/main/java/org/apache/tuscany/sca/implementation/java/xml/JavaImplementationProcessor.java b/branches/sca-equinox/modules/implementation-java-xml/src/main/java/org/apache/tuscany/sca/implementation/java/xml/JavaImplementationProcessor.java
new file mode 100644
index 0000000000..11934ec6bb
--- /dev/null
+++ b/branches/sca-equinox/modules/implementation-java-xml/src/main/java/org/apache/tuscany/sca/implementation/java/xml/JavaImplementationProcessor.java
@@ -0,0 +1,315 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * 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.java.xml;
+
+import static javax.xml.stream.XMLStreamConstants.END_ELEMENT;
+import static javax.xml.stream.XMLStreamConstants.START_ELEMENT;
+
+import java.lang.reflect.Field;
+import java.lang.reflect.Method;
+import java.lang.reflect.Modifier;
+import java.util.HashMap;
+import java.util.Map;
+
+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.ConfiguredOperation;
+import org.apache.tuscany.sca.assembly.OperationsConfigurator;
+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.builder.impl.ProblemImpl;
+import org.apache.tuscany.sca.assembly.xml.ConfiguredOperationProcessor;
+import org.apache.tuscany.sca.assembly.xml.Constants;
+import org.apache.tuscany.sca.assembly.xml.PolicyAttachPointProcessor;
+import org.apache.tuscany.sca.contribution.ModelFactoryExtensionPoint;
+import org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor;
+import org.apache.tuscany.sca.contribution.resolver.ClassReference;
+import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
+import org.apache.tuscany.sca.contribution.service.ContributionReadException;
+import org.apache.tuscany.sca.contribution.service.ContributionResolveException;
+import org.apache.tuscany.sca.contribution.service.ContributionWriteException;
+import org.apache.tuscany.sca.implementation.java.IntrospectionException;
+import org.apache.tuscany.sca.implementation.java.JavaImplementation;
+import org.apache.tuscany.sca.implementation.java.JavaImplementationFactory;
+import org.apache.tuscany.sca.implementation.java.impl.JavaElementImpl;
+import org.apache.tuscany.sca.implementation.java.introspect.impl.JavaIntrospectionHelper;
+import org.apache.tuscany.sca.interfacedef.Interface;
+import org.apache.tuscany.sca.interfacedef.java.JavaInterface;
+import org.apache.tuscany.sca.monitor.Monitor;
+import org.apache.tuscany.sca.monitor.Problem;
+import org.apache.tuscany.sca.monitor.Problem.Severity;
+import org.apache.tuscany.sca.policy.IntentAttachPointTypeFactory;
+import org.apache.tuscany.sca.policy.PolicyFactory;
+
+/**
+ *
+ * @version $Rev$ $Date$
+ */
+public class JavaImplementationProcessor implements StAXArtifactProcessor<JavaImplementation>,
+    JavaImplementationConstants {
+
+    private JavaImplementationFactory javaFactory;
+    private AssemblyFactory assemblyFactory;
+    private PolicyFactory policyFactory;
+    private PolicyAttachPointProcessor policyProcessor;
+    private IntentAttachPointTypeFactory  intentAttachPointTypeFactory;
+    private ConfiguredOperationProcessor configuredOperationProcessor;
+    private Monitor monitor;
+
+    public JavaImplementationProcessor(ModelFactoryExtensionPoint modelFactories, Monitor monitor) {
+        this.assemblyFactory = modelFactories.getFactory(AssemblyFactory.class);
+        this.policyFactory = modelFactories.getFactory(PolicyFactory.class);
+        this.javaFactory = modelFactories.getFactory(JavaImplementationFactory.class);
+        this.policyProcessor = new PolicyAttachPointProcessor(policyFactory);
+        this.intentAttachPointTypeFactory = modelFactories.getFactory(IntentAttachPointTypeFactory.class);
+        this.monitor = monitor;
+        this.configuredOperationProcessor = new ConfiguredOperationProcessor(modelFactories, this.monitor);
+    }
+    
+    /**
+     * Report a error.
+     * 
+     * @param problems
+     * @param message
+     * @param model
+     */
+     private void error(String message, Object model, Object... messageParameters) {
+    	 if (monitor != null) {
+    		 Problem problem = new ProblemImpl(this.getClass().getName(), "impl-javaxml-validation-messages", Severity.ERROR, model, message,(Object[])messageParameters);
+    	     monitor.problem(problem);
+    	 }        
+     }
+     
+     /**
+      * Report a exception.
+      * 
+      * @param problems
+      * @param message
+      * @param model
+      */
+      private void error(String message, Object model, Exception ex) {
+     	 if (monitor != null) {
+     		 Problem problem = new ProblemImpl(this.getClass().getName(), "impl-javaxml-validation-messages", Severity.ERROR, model, message, ex);
+     	     monitor.problem(problem);
+     	 }        
+      }
+
+    public JavaImplementation read(XMLStreamReader reader) throws ContributionReadException, XMLStreamException {
+
+        // Read an <implementation.java>
+        JavaImplementation javaImplementation = javaFactory.createJavaImplementation();
+        
+        /*if ( javaImplementation instanceof PolicySetAttachPoint ) {
+            IntentAttachPointType implType = intentAttachPointTypeFactory.createImplementationType();
+            implType.setName(getArtifactType());
+            implType.setUnresolved(true);
+            ((PolicySetAttachPoint)javaImplementation).setType(implType);
+        }*/
+        
+        javaImplementation.setUnresolved(true);
+        javaImplementation.setName(reader.getAttributeValue(null, CLASS));
+
+        // Read policies
+        policyProcessor.readPolicies(javaImplementation, reader);
+
+        // read operation elements if exists or skip unto end element
+        int event;
+        ConfiguredOperation confOp = null;
+        while (reader.hasNext()) {
+            event = reader.next();
+            switch ( event ) {
+                case START_ELEMENT  : {
+                    if ( Constants.OPERATION_QNAME.equals(reader.getName()) ) {
+                        confOp = configuredOperationProcessor.read(reader);
+                        if ( confOp != null ) {
+                            ((OperationsConfigurator)javaImplementation).getConfiguredOperations().add(confOp);
+                        }
+                    }
+                }
+                break;
+            }
+
+            if (event == END_ELEMENT && IMPLEMENTATION_JAVA_QNAME.equals(reader.getName())) {
+                break;
+            }
+        }
+        return javaImplementation;
+    }
+
+    public void write(JavaImplementation javaImplementation, XMLStreamWriter writer) throws ContributionWriteException,
+        XMLStreamException {
+
+        // Write an <implementation.java>
+        policyProcessor.writePolicyPrefixes(javaImplementation, writer);
+        writer.writeStartElement(Constants.SCA10_NS, IMPLEMENTATION_JAVA);
+        policyProcessor.writePolicyAttributes(javaImplementation, writer);
+
+        if (javaImplementation.getName() != null) {
+            writer.writeAttribute(CLASS, javaImplementation.getName());
+        }
+
+        writer.writeEndElement();
+    }
+
+    public void resolve(JavaImplementation javaImplementation, ModelResolver resolver)
+        throws ContributionResolveException {
+
+        ClassReference classReference = new ClassReference(javaImplementation.getName());
+        classReference = resolver.resolveModel(ClassReference.class, classReference);
+        Class javaClass = classReference.getJavaClass();
+        if (javaClass == null) {
+        	error("ClassNotFoundException", resolver, javaImplementation.getName());
+            //throw new ContributionResolveException(new ClassNotFoundException(javaImplementation.getName()));
+        	return;
+        }
+        
+        javaImplementation.setJavaClass(javaClass);        
+
+        try {
+            javaFactory.createJavaImplementation(javaImplementation, javaImplementation.getJavaClass());
+        } catch (IntrospectionException e) {
+        	ContributionResolveException ce = new ContributionResolveException(e);
+        	error("ContributionResolveException", javaFactory, ce);
+            //throw ce;
+        	return;
+        }
+        
+        javaImplementation.setUnresolved(false);
+        mergeComponentType(resolver, javaImplementation);
+
+        // FIXME the introspector should always create at least one service
+        if (javaImplementation.getServices().isEmpty()) {
+            javaImplementation.getServices().add(assemblyFactory.createService());
+        }
+    }
+
+    private JavaElementImpl getMemeber(JavaImplementation impl, String name, Class<?> type) {
+        String setter = JavaIntrospectionHelper.toSetter(name);
+        try {
+            Method method = impl.getJavaClass().getDeclaredMethod(setter, type);
+            int mod = method.getModifiers();
+            if ((Modifier.isPublic(mod) || Modifier.isProtected(mod)) && (!Modifier.isStatic(mod))) {
+                return new JavaElementImpl(method, 0);
+            }
+        } catch (NoSuchMethodException e) {
+            Field field;
+            try {
+                field = impl.getJavaClass().getDeclaredField(name);
+                int mod = field.getModifiers();
+                if ((Modifier.isPublic(mod) || Modifier.isProtected(mod)) && (!Modifier.isStatic(mod))) {
+                	return new JavaElementImpl(field);
+                }
+            } catch (NoSuchFieldException e1) {
+                // Ignore
+            }
+        }
+        return null;
+    }
+
+    /**
+     * Merge the componentType from introspection and external file
+     * @param resolver
+     * @param impl
+     */
+    private void mergeComponentType(ModelResolver resolver, JavaImplementation impl) {
+        // FIXME: Need to clarify how to merge
+        ComponentType componentType = getComponentType(resolver, impl);
+        if (componentType != null && !componentType.isUnresolved()) {
+            Map<String, Reference> refMap = new HashMap<String, Reference>();
+            for (Reference ref : impl.getReferences()) {
+                refMap.put(ref.getName(), ref);
+            }
+            for (Reference reference : componentType.getReferences()) {
+                refMap.put(reference.getName(), reference);
+            }
+            impl.getReferences().clear();
+            impl.getReferences().addAll(refMap.values());
+
+            // Try to match references by type
+            Map<String, JavaElementImpl> refMembers = impl.getReferenceMembers();
+            for (Reference ref : impl.getReferences()) {
+                if (ref.getInterfaceContract() != null) {
+                    Interface i = ref.getInterfaceContract().getInterface();
+                    if (i instanceof JavaInterface) {
+                        Class<?> type = ((JavaInterface)i).getJavaClass();
+                        if (!refMembers.containsKey(ref.getName())) {
+                            JavaElementImpl e = getMemeber(impl, ref.getName(), type);
+                            if (e != null) {
+                                refMembers.put(ref.getName(), e);
+                            }
+                        }
+                    }
+                }
+            }
+
+            Map<String, Service> serviceMap = new HashMap<String, Service>();
+            for (Service svc : impl.getServices()) {
+                serviceMap.put(svc.getName(), svc);
+            }
+            for (Service service : componentType.getServices()) {
+                serviceMap.put(service.getName(), service);
+            }
+            impl.getServices().clear();
+            impl.getServices().addAll(serviceMap.values());
+
+            Map<String, Property> propMap = new HashMap<String, Property>();
+            for (Property prop : impl.getProperties()) {
+                propMap.put(prop.getName(), prop);
+            }
+            for (Property property : componentType.getProperties()) {
+                propMap.put(property.getName(), property);
+            }
+            impl.getProperties().clear();
+            impl.getProperties().addAll(propMap.values());
+
+            if (componentType.getConstrainingType() != null) {
+                impl.setConstrainingType(componentType.getConstrainingType());
+            }
+        }
+    }
+
+    private ComponentType getComponentType(ModelResolver resolver, JavaImplementation impl) {
+        String className = impl.getJavaClass().getName();
+        String componentTypeURI = className.replace('.', '/') + ".componentType";
+        ComponentType componentType = assemblyFactory.createComponentType();
+        componentType.setUnresolved(true);
+        componentType.setURI(componentTypeURI);
+        componentType = resolver.resolveModel(ComponentType.class, componentType);
+        if (!componentType.isUnresolved()) {
+            return componentType;
+        }
+        return null;
+    }
+
+    public QName getArtifactType() {
+        return IMPLEMENTATION_JAVA_QNAME;
+    }
+
+    public Class<JavaImplementation> getModelType() {
+        return JavaImplementation.class;
+    }
+
+}
diff --git a/branches/sca-equinox/modules/implementation-java-xml/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor b/branches/sca-equinox/modules/implementation-java-xml/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor
new file mode 100644
index 0000000000..ff43eebcfc
--- /dev/null
+++ b/branches/sca-equinox/modules/implementation-java-xml/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor
@@ -0,0 +1,19 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+# 
+#   http://www.apache.org/licenses/LICENSE-2.0
+# 
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License. 
+
+# Implementation class for the artifact processor extension
+org.apache.tuscany.sca.implementation.java.xml.JavaImplementationProcessor;qname=http://www.osoa.org/xmlns/sca/1.0#implementation.java,model=org.apache.tuscany.sca.implementation.java.JavaImplementation
diff --git a/branches/sca-equinox/modules/implementation-java-xml/src/main/resources/impl-javaxml-validation-messages.properties b/branches/sca-equinox/modules/implementation-java-xml/src/main/resources/impl-javaxml-validation-messages.properties
new file mode 100644
index 0000000000..210b715da8
--- /dev/null
+++ b/branches/sca-equinox/modules/implementation-java-xml/src/main/resources/impl-javaxml-validation-messages.properties
@@ -0,0 +1,23 @@
+#
+#
+#    Licensed to the Apache Software Foundation (ASF) under one
+#    or more contributor license agreements. See the NOTICE file
+#    distributed with this work for additional information
+#    regarding copyright ownership. The ASF licenses this file
+#    to you under the Apache License, Version 2.0 (the
+#    "License"); you may not use this file except in compliance
+#    with the License. You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing,
+#    software distributed under the License is distributed on an
+#    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+#    KIND, either express or implied. See the License for the
+#    specific language governing permissions and limitations
+#    under the License.
+#
+#
+ClassNotFoundException = Class Not Found Exception: {0}
+ContributionResolveException = Contribution Resolve Exception occured due to: 
+
diff --git a/branches/sca-equinox/modules/implementation-java-xml/src/test/java/calculator/AddService.java b/branches/sca-equinox/modules/implementation-java-xml/src/test/java/calculator/AddService.java
new file mode 100644
index 0000000000..9c22177684
--- /dev/null
+++ b/branches/sca-equinox/modules/implementation-java-xml/src/test/java/calculator/AddService.java
@@ -0,0 +1,30 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package calculator;
+
+/**
+ * Interface for the Add Service.
+ *
+ * @version $Rev$ $Date$
+ */
+public interface AddService {
+
+    double add(double n1, double n2);
+
+}
diff --git a/branches/sca-equinox/modules/implementation-java-xml/src/test/java/calculator/AddServiceImpl.java b/branches/sca-equinox/modules/implementation-java-xml/src/test/java/calculator/AddServiceImpl.java
new file mode 100644
index 0000000000..3f28d740a7
--- /dev/null
+++ b/branches/sca-equinox/modules/implementation-java-xml/src/test/java/calculator/AddServiceImpl.java
@@ -0,0 +1,37 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package calculator;
+
+import org.osoa.sca.annotations.EagerInit;
+import org.osoa.sca.annotations.Scope;
+
+/**
+ * An implementation of the Add service.
+ *
+ * @version $Rev$ $Date$
+ */
+@Scope("COMPOSITE")
+@EagerInit
+public class AddServiceImpl implements AddService {
+
+    public double add(double n1, double n2) {
+        return n1 + n2;
+    }
+
+}
diff --git a/branches/sca-equinox/modules/implementation-java-xml/src/test/java/calculator/CalculatorService.java b/branches/sca-equinox/modules/implementation-java-xml/src/test/java/calculator/CalculatorService.java
new file mode 100644
index 0000000000..e0cf23dc17
--- /dev/null
+++ b/branches/sca-equinox/modules/implementation-java-xml/src/test/java/calculator/CalculatorService.java
@@ -0,0 +1,36 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package calculator;
+
+/**
+ * The Calculator service interface.
+ *
+ * @version $Rev$ $Date$
+ */
+public interface CalculatorService {
+
+    double add(double n1, double n2);
+
+    double subtract(double n1, double n2);
+
+    double multiply(double n1, double n2);
+
+    double divide(double n1, double n2);
+
+}
diff --git a/branches/sca-equinox/modules/implementation-java-xml/src/test/java/calculator/CalculatorServiceImpl.java b/branches/sca-equinox/modules/implementation-java-xml/src/test/java/calculator/CalculatorServiceImpl.java
new file mode 100644
index 0000000000..c1fceb575d
--- /dev/null
+++ b/branches/sca-equinox/modules/implementation-java-xml/src/test/java/calculator/CalculatorServiceImpl.java
@@ -0,0 +1,73 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package calculator;
+
+import org.osoa.sca.annotations.Reference;
+import org.osoa.sca.annotations.Scope;
+
+/**
+ * An implementation of the Calculator service.
+ *
+ * @version $Rev$ $Date$
+ */
+@Scope("COMPOSITE")
+public class CalculatorServiceImpl implements CalculatorService {
+
+    private AddService addService;
+    private SubtractService subtractService;
+    private MultiplyService multiplyService;
+    private DivideService divideService;
+
+    @Reference
+    public void setAddService(AddService addService) {
+        this.addService = addService;
+    }
+
+    @Reference
+    public void setSubtractService(SubtractService subtractService) {
+        this.subtractService = subtractService;
+    }
+
+    @Reference
+    public void setDivideService(DivideService divideService) {
+        this.divideService = divideService;
+    }
+
+    @Reference
+    public void setMultiplyService(MultiplyService multiplyService) {
+        this.multiplyService = multiplyService;
+    }
+
+    public double add(double n1, double n2) {
+        return addService.add(n1, n2);
+    }
+
+    public double subtract(double n1, double n2) {
+        return subtractService.subtract(n1, n2);
+    }
+
+    public double multiply(double n1, double n2) {
+        return multiplyService.multiply(n1, n2);
+    }
+
+    public double divide(double n1, double n2) {
+        return divideService.divide(n1, n2);
+    }
+
+}
diff --git a/branches/sca-equinox/modules/implementation-java-xml/src/test/java/calculator/DivideService.java b/branches/sca-equinox/modules/implementation-java-xml/src/test/java/calculator/DivideService.java
new file mode 100644
index 0000000000..9599c86292
--- /dev/null
+++ b/branches/sca-equinox/modules/implementation-java-xml/src/test/java/calculator/DivideService.java
@@ -0,0 +1,30 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package calculator;
+
+/**
+ * Interface for the Divide Service.
+ *
+ * @version $Rev$ $Date$
+ */
+public interface DivideService {
+
+    double divide(double n1, double n2);
+
+}
diff --git a/branches/sca-equinox/modules/implementation-java-xml/src/test/java/calculator/DivideServiceImpl.java b/branches/sca-equinox/modules/implementation-java-xml/src/test/java/calculator/DivideServiceImpl.java
new file mode 100644
index 0000000000..e1f35f99b5
--- /dev/null
+++ b/branches/sca-equinox/modules/implementation-java-xml/src/test/java/calculator/DivideServiceImpl.java
@@ -0,0 +1,35 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package calculator;
+
+import org.osoa.sca.annotations.Scope;
+
+/**
+ * An implementation of the Divide service.
+ *
+ * @version $Rev$ $Date$
+ */
+@Scope("COMPOSITE")
+public class DivideServiceImpl implements DivideService {
+
+    public double divide(double n1, double n2) {
+        return n1 / n2;
+    }
+
+}
diff --git a/branches/sca-equinox/modules/implementation-java-xml/src/test/java/calculator/MultiplyService.java b/branches/sca-equinox/modules/implementation-java-xml/src/test/java/calculator/MultiplyService.java
new file mode 100644
index 0000000000..7a3d06c15e
--- /dev/null
+++ b/branches/sca-equinox/modules/implementation-java-xml/src/test/java/calculator/MultiplyService.java
@@ -0,0 +1,30 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package calculator;
+
+/**
+ * Interface for the Multiply Service.
+ *
+ * @version $Rev$ $Date$
+ */
+public interface MultiplyService {
+
+    double multiply(double n1, double n2);
+
+}
diff --git a/branches/sca-equinox/modules/implementation-java-xml/src/test/java/calculator/MultiplyServiceImpl.java b/branches/sca-equinox/modules/implementation-java-xml/src/test/java/calculator/MultiplyServiceImpl.java
new file mode 100644
index 0000000000..d621407908
--- /dev/null
+++ b/branches/sca-equinox/modules/implementation-java-xml/src/test/java/calculator/MultiplyServiceImpl.java
@@ -0,0 +1,35 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package calculator;
+
+import org.osoa.sca.annotations.Scope;
+
+/**
+ * An implementation of the Multiply service.
+ *
+ * @version $Rev$ $Date$
+ */
+@Scope("COMPOSITE")
+public class MultiplyServiceImpl implements MultiplyService {
+
+    public double multiply(double n1, double n2) {
+        return n1 * n2;
+    }
+
+}
diff --git a/branches/sca-equinox/modules/implementation-java-xml/src/test/java/calculator/SubtractService.java b/branches/sca-equinox/modules/implementation-java-xml/src/test/java/calculator/SubtractService.java
new file mode 100644
index 0000000000..21af91f392
--- /dev/null
+++ b/branches/sca-equinox/modules/implementation-java-xml/src/test/java/calculator/SubtractService.java
@@ -0,0 +1,30 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package calculator;
+
+/**
+ * Interface for the Subtract Service.
+ *
+ * @version $Rev$ $Date$
+ */
+public interface SubtractService {
+
+    double subtract(double n1, double n2);
+
+}
diff --git a/branches/sca-equinox/modules/implementation-java-xml/src/test/java/calculator/SubtractServiceImpl.java b/branches/sca-equinox/modules/implementation-java-xml/src/test/java/calculator/SubtractServiceImpl.java
new file mode 100644
index 0000000000..4fed0a8c6a
--- /dev/null
+++ b/branches/sca-equinox/modules/implementation-java-xml/src/test/java/calculator/SubtractServiceImpl.java
@@ -0,0 +1,35 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package calculator;
+
+import org.osoa.sca.annotations.Scope;
+
+/**
+ * An implementation of the subtract service.
+ *
+ * @version $Rev$ $Date$
+ */
+@Scope("COMPOSITE")
+public class SubtractServiceImpl implements SubtractService {
+
+    public double subtract(double n1, double n2) {
+        return n1 - n2;
+    }
+
+}
diff --git a/branches/sca-equinox/modules/implementation-java-xml/src/test/java/org/apache/tuscany/sca/implementation/java/xml/ReadTestCase.java b/branches/sca-equinox/modules/implementation-java-xml/src/test/java/org/apache/tuscany/sca/implementation/java/xml/ReadTestCase.java
new file mode 100644
index 0000000000..e5912906f5
--- /dev/null
+++ b/branches/sca-equinox/modules/implementation-java-xml/src/test/java/org/apache/tuscany/sca/implementation/java/xml/ReadTestCase.java
@@ -0,0 +1,224 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * 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.java.xml;
+
+import java.io.InputStream;
+import java.net.URI;
+import java.net.URL;
+
+import javax.xml.stream.XMLInputFactory;
+import javax.xml.stream.XMLStreamReader;
+
+import junit.framework.TestCase;
+
+import org.apache.tuscany.sca.assembly.AssemblyFactory;
+import org.apache.tuscany.sca.assembly.Component;
+import org.apache.tuscany.sca.assembly.Composite;
+import org.apache.tuscany.sca.assembly.OperationsConfigurator;
+import org.apache.tuscany.sca.assembly.SCABindingFactory;
+import org.apache.tuscany.sca.assembly.builder.CompositeBuilder;
+import org.apache.tuscany.sca.assembly.builder.impl.CompositeBuilderImpl;
+import org.apache.tuscany.sca.contribution.ModelFactoryExtensionPoint;
+import org.apache.tuscany.sca.contribution.processor.ExtensibleStAXArtifactProcessor;
+import org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor;
+import org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessorExtensionPoint;
+import org.apache.tuscany.sca.contribution.processor.URLArtifactProcessor;
+import org.apache.tuscany.sca.contribution.processor.URLArtifactProcessorExtensionPoint;
+import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
+import org.apache.tuscany.sca.core.DefaultExtensionPointRegistry;
+import org.apache.tuscany.sca.core.UtilityExtensionPoint;
+import org.apache.tuscany.sca.definitions.SCADefinitions;
+import org.apache.tuscany.sca.interfacedef.InterfaceContractMapper;
+import org.apache.tuscany.sca.interfacedef.impl.InterfaceContractMapperImpl;
+import org.apache.tuscany.sca.policy.Intent;
+import org.apache.tuscany.sca.policy.IntentAttachPointTypeFactory;
+import org.apache.tuscany.sca.policy.PolicySet;
+import org.apache.tuscany.sca.policy.PolicySetAttachPoint;
+
+/**
+ * Test reading Java implementations.
+ * 
+ * @version $Rev$ $Date$
+ */
+public class ReadTestCase extends TestCase {
+
+    private XMLInputFactory inputFactory;
+    private StAXArtifactProcessor<Object> staxProcessor;
+    private URLArtifactProcessor<SCADefinitions> policyDefinitionsProcessor;
+    private CompositeBuilder compositeBuilder;
+    
+    @Override
+    public void setUp() throws Exception {
+        DefaultExtensionPointRegistry extensionPoints = new DefaultExtensionPointRegistry();
+        inputFactory = XMLInputFactory.newInstance();
+        StAXArtifactProcessorExtensionPoint staxProcessors = extensionPoints.getExtensionPoint(StAXArtifactProcessorExtensionPoint.class);
+        staxProcessor = new ExtensibleStAXArtifactProcessor(staxProcessors, inputFactory, null, null);
+
+        ModelFactoryExtensionPoint modelFactories = extensionPoints.getExtensionPoint(ModelFactoryExtensionPoint.class);
+        AssemblyFactory assemblyFactory = modelFactories.getFactory(AssemblyFactory.class);
+        SCABindingFactory scaBindingFactory = modelFactories.getFactory(SCABindingFactory.class);
+        UtilityExtensionPoint utilities = extensionPoints.getExtensionPoint(UtilityExtensionPoint.class);
+        InterfaceContractMapper mapper = utilities.getUtility(InterfaceContractMapper.class);
+        IntentAttachPointTypeFactory attachPointTypeFactory = modelFactories.getFactory(IntentAttachPointTypeFactory.class);
+        compositeBuilder = new CompositeBuilderImpl(assemblyFactory, scaBindingFactory, attachPointTypeFactory, mapper, null);
+        
+        URLArtifactProcessorExtensionPoint documentProcessors = extensionPoints.getExtensionPoint(URLArtifactProcessorExtensionPoint.class); 
+        policyDefinitionsProcessor = documentProcessors.getProcessor(SCADefinitions.class);
+    }
+
+    public void testReadComposite() throws Exception {
+        InputStream is = getClass().getResourceAsStream("Calculator.composite");
+        XMLStreamReader reader = inputFactory.createXMLStreamReader(is);
+        Composite composite = (Composite)staxProcessor.read(reader);
+        assertNotNull(composite);
+
+        compositeBuilder.build(composite);
+
+    }
+
+    public void fixmeTestPolicyIntents() throws Exception {
+        ModelResolver resolver = new TestModelResolver(getClass().getClassLoader());
+        
+        URL url = getClass().getResource("definitions.xml");
+        URI uri = URI.create("definitions.xml");
+        SCADefinitions scaDefns = policyDefinitionsProcessor.read(null, uri, url);
+                
+        InputStream is = getClass().getResourceAsStream("Calculator.composite");
+        XMLStreamReader reader = inputFactory.createXMLStreamReader(is);
+        Composite composite = (Composite)staxProcessor.read(reader);
+        assertNotNull(composite);
+        
+        staxProcessor.resolve(scaDefns, resolver);
+        staxProcessor.resolve(composite, resolver);
+
+        compositeBuilder.build(composite);
+        
+        //intents are computed and aggregate intents from ancestor elements
+        assertEquals(((PolicySetAttachPoint)composite.getComponents().get(0)).getRequiredIntents().size(), 3);
+        assertEquals(((PolicySetAttachPoint)composite.getComponents().get(5)).getRequiredIntents().size(), 3);
+        
+        //assertEquals(((OperationsConfigurator)composite.getComponents().get(0)).getConfiguredOperations().isEmpty(), true);
+        //assertEquals(((OperationsConfigurator)composite.getComponents().get(5)).getConfiguredOperations().isEmpty(), false);
+        
+        
+        //test for proper aggregation of policy intents on implementation elements
+        for ( Intent intent : ((PolicySetAttachPoint)composite.getComponents().get(0).getImplementation()).getRequiredIntents() ) {
+            String intentName = intent.getName().getLocalPart();
+            if ( !(intentName.equals("tuscanyIntent_1") || intentName.equals("tuscanyIntent_2") ||
+                intentName.equals("tuscanyIntent_3")) ) {
+                fail();
+            }
+        }
+        
+        for ( Intent intent : ((PolicySetAttachPoint)composite.getComponents().get(5)).getRequiredIntents() ) {
+            String intentName = intent.getName().getLocalPart();
+            if ( !(intentName.equals("tuscanyIntent_1") || intentName.equals("tuscanyIntent_4") ||
+                intentName.equals("tuscanyIntent_5")) ) {
+                fail();
+            }
+        }
+
+        //test for proper aggregation of policy intents and policysets on operations of implementation
+        OperationsConfigurator opConf = (OperationsConfigurator)composite.getComponents().get(5);
+        assertEquals(opConf.getConfiguredOperations().get(0).getRequiredIntents().size(), 4);
+        for ( Intent intent :  opConf.getConfiguredOperations().get(0).getRequiredIntents()) {
+            String intentName = intent.getName().getLocalPart();
+            if ( !(intentName.equals("tuscanyIntent_1") || intentName.equals("tuscanyIntent_4") ||
+                intentName.equals("tuscanyIntent_5") || intentName.equals("tuscanyIntent_6") ) ) {
+                fail();
+            }
+        }
+        
+        opConf = (OperationsConfigurator)composite.getComponents().get(6);
+        assertEquals(opConf.getConfiguredOperations().get(0).getRequiredIntents().size(), 3);
+        for ( Intent intent :  opConf.getConfiguredOperations().get(0).getRequiredIntents()) {
+            String intentName = intent.getName().getLocalPart();
+            if ( !(intentName.equals("tuscanyIntent_1") || intentName.equals("tuscanyIntent_4") ||
+                intentName.equals("tuscanyIntent_6.qualified2") ) ) {
+                fail();
+            }
+        }
+    }
+    
+    public void testPolicySets() throws Exception {
+        ModelResolver resolver = new TestModelResolver(getClass().getClassLoader());
+        
+        URL url = getClass().getResource("definitions_with_policysets.xml");
+        URI uri = URI.create("definitions_with_policysets.xml");
+        SCADefinitions policyDefinitions = policyDefinitionsProcessor.read(null, uri, url);
+                
+        InputStream is = getClass().getResourceAsStream("Calculator.composite");
+        XMLStreamReader reader = inputFactory.createXMLStreamReader(is);
+        Composite composite = (Composite)staxProcessor.read(reader);
+        assertNotNull(composite);
+        
+        for ( Component component : composite.getComponents() ) {
+            for ( PolicySet policySet : policyDefinitions.getPolicySets() ) {
+                component.getApplicablePolicySets().add(policySet);
+            }
+        }
+        
+        staxProcessor.resolve(policyDefinitions, resolver);
+        staxProcessor.resolve(composite, resolver);
+
+        compositeBuilder.build(composite);
+        
+        //test for determination of policysets for implementation
+        assertEquals(((PolicySetAttachPoint)composite.getComponents().get(0)).getPolicySets().size(), 1);
+        for ( PolicySet policySet : ((PolicySetAttachPoint)composite.getComponents().get(0).getImplementation()).getPolicySets() ) {
+            String policySetName = policySet.getName().getLocalPart();
+            if ( !(policySetName.equals("tuscanyPolicySet_1")) ) {
+                fail();
+            }
+        }
+        
+        assertEquals(((PolicySetAttachPoint)composite.getComponents().get(5)).getPolicySets().size(), 2);
+        for ( PolicySet policySet : ((PolicySetAttachPoint)composite.getComponents().get(5).getImplementation()).getPolicySets() ) {
+            String policySetName = policySet.getName().getLocalPart();
+            if ( !(policySetName.equals("tuscanyPolicySet_1") || policySetName.equals("tuscanyPolicySet_2")) ) {
+                fail();
+            }
+        }
+
+        //test for computation of policysets on operations of implementation
+        OperationsConfigurator opConf = (OperationsConfigurator)composite.getComponents().get(5);
+        assertEquals(opConf.getConfiguredOperations().get(0).getPolicySets().size(), 3);
+        for ( PolicySet policySet : opConf.getConfiguredOperations().get(0).getPolicySets() ) {
+            String policySetName = policySet.getName().getLocalPart();
+            if ( !(policySetName.equals("tuscanyPolicySet_1") || policySetName.equals("tuscanyPolicySet_2")
+                    || policySetName.equals("tuscanyPolicySet_3")) ) {
+                fail();
+            }
+        }
+        
+        opConf = (OperationsConfigurator)composite.getComponents().get(6);
+        assertEquals(opConf.getConfiguredOperations().get(0).getPolicySets().size(), 4);
+        for ( PolicySet policySet : opConf.getConfiguredOperations().get(0).getPolicySets() ) {
+            String policySetName = policySet.getName().getLocalPart();
+            if ( !(policySetName.equals("tuscanyPolicySet_1") || policySetName.equals("tuscanyPolicySet_2")
+                    || policySetName.equals("tuscanyPolicySet_3")
+                    || policySetName.equals("tuscanyPolicySet_4")) ) {
+                fail();
+            }
+        }
+        //new PrintUtil(System.out).print(composite);
+    }
+
+}
diff --git a/branches/sca-equinox/modules/implementation-java-xml/src/test/java/org/apache/tuscany/sca/implementation/java/xml/TestModelResolver.java b/branches/sca-equinox/modules/implementation-java-xml/src/test/java/org/apache/tuscany/sca/implementation/java/xml/TestModelResolver.java
new file mode 100644
index 0000000000..27e3579c35
--- /dev/null
+++ b/branches/sca-equinox/modules/implementation-java-xml/src/test/java/org/apache/tuscany/sca/implementation/java/xml/TestModelResolver.java
@@ -0,0 +1,88 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.implementation.java.xml;
+
+import java.lang.ref.WeakReference;
+import java.util.HashMap;
+import java.util.Map;
+
+import org.apache.tuscany.sca.contribution.resolver.ClassReference;
+import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
+
+
+/**
+ * A default implementation of an artifact resolver, based on a map.
+ *
+ * @version $Rev$ $Date$
+ */
+public class TestModelResolver implements ModelResolver {
+    private static final long serialVersionUID = -7826976465762296634L;
+    
+    private Map<Object, Object> map = new HashMap<Object, Object>();
+    
+    private WeakReference<ClassLoader> classLoader;
+    
+    public TestModelResolver(ClassLoader classLoader) {
+        this.classLoader = new WeakReference<ClassLoader>(classLoader);
+    }
+
+    public <T> T resolveModel(Class<T> modelClass, T unresolved) {
+        Object resolved = map.get(unresolved);
+        if (resolved != null) {
+            
+            // Return the resolved object
+            return modelClass.cast(resolved);
+            
+        } else if (unresolved instanceof ClassReference) {
+            
+            // Load a class on demand
+            ClassReference classReference = (ClassReference)unresolved;
+            Class clazz;
+            try {
+                clazz = Class.forName(classReference.getClassName(), true, classLoader.get());
+            } catch (ClassNotFoundException e) {
+                
+                // Return the unresolved object
+                return unresolved;
+            }
+            
+            // Store a new ClassReference wrapping the loaded class
+            resolved = new ClassReference(clazz);
+            map.put(resolved, resolved);
+            
+            // Return the resolved ClassReference
+            return modelClass.cast(resolved);
+                
+        } else {
+            
+            // Return the unresolved object
+            return unresolved;
+        }
+    }
+    
+    public void addModel(Object resolved) {
+        map.put(resolved, resolved);
+    }
+    
+    public Object removeModel(Object resolved) {
+        return map.remove(resolved);
+    }
+    
+}
diff --git a/branches/sca-equinox/modules/implementation-java-xml/src/test/java/org/apache/tuscany/sca/implementation/java/xml/WriteTestCase.java b/branches/sca-equinox/modules/implementation-java-xml/src/test/java/org/apache/tuscany/sca/implementation/java/xml/WriteTestCase.java
new file mode 100644
index 0000000000..646b5db617
--- /dev/null
+++ b/branches/sca-equinox/modules/implementation-java-xml/src/test/java/org/apache/tuscany/sca/implementation/java/xml/WriteTestCase.java
@@ -0,0 +1,64 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * 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.java.xml;
+
+import java.io.ByteArrayOutputStream;
+import java.io.InputStream;
+
+import javax.xml.stream.XMLInputFactory;
+import javax.xml.stream.XMLOutputFactory;
+
+import junit.framework.TestCase;
+
+import org.apache.tuscany.sca.assembly.Composite;
+import org.apache.tuscany.sca.contribution.processor.ExtensibleStAXArtifactProcessor;
+import org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor;
+import org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessorExtensionPoint;
+import org.apache.tuscany.sca.core.DefaultExtensionPointRegistry;
+
+/**
+ * Test writing Java implementations.
+ * 
+ * @version $Rev$ $Date$
+ */
+public class WriteTestCase extends TestCase {
+
+    private StAXArtifactProcessor<Object> staxProcessor;
+    private XMLInputFactory inputFactory;
+    private XMLOutputFactory outputFactory;
+    
+    @Override
+    public void setUp() throws Exception {
+        DefaultExtensionPointRegistry extensionPoints = new DefaultExtensionPointRegistry();
+        inputFactory = XMLInputFactory.newInstance();
+        outputFactory = XMLOutputFactory.newInstance();
+        StAXArtifactProcessorExtensionPoint staxProcessors = extensionPoints.getExtensionPoint(StAXArtifactProcessorExtensionPoint.class);
+        staxProcessor = new ExtensibleStAXArtifactProcessor(staxProcessors, inputFactory, outputFactory, null);
+    }
+
+    public void testReadWriteComposite() throws Exception {
+        InputStream is = getClass().getResourceAsStream("Calculator.composite");
+        Composite composite = (Composite)staxProcessor.read(inputFactory.createXMLStreamReader(is));
+        assertNotNull(composite);
+        ByteArrayOutputStream bos = new ByteArrayOutputStream();
+        staxProcessor.write(composite, outputFactory.createXMLStreamWriter(bos));
+    }
+
+}
diff --git a/branches/sca-equinox/modules/implementation-java-xml/src/test/resources/org/apache/tuscany/sca/implementation/java/xml/Calculator.composite b/branches/sca-equinox/modules/implementation-java-xml/src/test/resources/org/apache/tuscany/sca/implementation/java/xml/Calculator.composite
new file mode 100644
index 0000000000..a58fa0c072
--- /dev/null
+++ b/branches/sca-equinox/modules/implementation-java-xml/src/test/resources/org/apache/tuscany/sca/implementation/java/xml/Calculator.composite
@@ -0,0 +1,66 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+-->
+<composite xmlns="http://www.osoa.org/xmlns/sca/1.0"
+	xmlns:calc="http://sample.calculator"
+	requires="cns:tuscanyIntent_1"
+	targetNamespace="http://sample.calculator"
+	xmlns:cns="http://test" 
+	name="Calculator">
+
+    <service name="CalculatorService" promote="CalculatorServiceComponent">
+        <interface.java interface="calculator.CalculatorService"/>
+    </service>
+
+    <component name="CalculatorServiceComponent" requires="cns:tuscanyIntent_2">
+		<implementation.java class="calculator.CalculatorServiceImpl" requires="cns:tuscanyIntent_3" />
+        <reference name="addService" target="AddServiceComponent"/>
+        <reference name="subtractService" target="SubtractServiceComponent"/>
+        <reference name="multiplyService" target="MultiplyServiceComponent"/>
+        <reference name="divideService" target="DivideServiceComponent"/>
+    </component>
+
+    <component name="AddServiceComponent">
+        <implementation.java class="calculator.AddServiceImpl"/>
+    </component>
+
+    <component name="SubtractServiceComponent">
+        <implementation.java class="calculator.SubtractServiceImpl"/>
+    </component>
+
+    <component name="MultiplyServiceComponent">
+        <implementation.java class="calculator.MultiplyServiceImpl"/>
+    </component>
+
+    <component name="DivideServiceComponent">
+        <implementation.java class="calculator.DivideServiceImpl"/>
+    </component>
+    
+    <component name="AnotherCalculatorServiceComponent" requires="cns:tuscanyIntent_4">
+		<implementation.java class="calculator.CalculatorServiceImpl" requires="cns:tuscanyIntent_5">
+			<operation name="add"  requires="cns:tuscanyIntent_6"/>
+		</implementation.java>	
+    </component>
+    
+    <component name="YetAnotherCalculatorServiceComponent" requires="cns:tuscanyIntent_4">
+		<implementation.java class="calculator.CalculatorServiceImpl" requires="cns:tuscanyIntent_6.qualified1">
+			<operation name="add"  requires="cns:tuscanyIntent_6.qualified2" policySets="cns:tuscanyPolicySet_4"/>
+		</implementation.java>	
+    </component>
+</composite>
diff --git a/branches/sca-equinox/modules/implementation-java-xml/src/test/resources/org/apache/tuscany/sca/implementation/java/xml/definitions.xml b/branches/sca-equinox/modules/implementation-java-xml/src/test/resources/org/apache/tuscany/sca/implementation/java/xml/definitions.xml
new file mode 100644
index 0000000000..cddc134c2c
--- /dev/null
+++ b/branches/sca-equinox/modules/implementation-java-xml/src/test/resources/org/apache/tuscany/sca/implementation/java/xml/definitions.xml
@@ -0,0 +1,100 @@
+<?xml version="1.0" encoding="ASCII"?>

+<!--

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

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

+ * distributed with this work for additional information

+ * regarding copyright ownership.  The ASF licenses this file

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

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

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

+ * 

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

+ * 

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

+ * software distributed under the License is distributed on an

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

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

+ * specific language governing permissions and limitations

+ * under the License.    

+-->

+<sca:definitions xmlns="http://test"

+ 			targetNamespace="http://test"

+ 			xmlns:sca="http://www.osoa.org/xmlns/sca/1.0">

+

+<!-- simple intent -->

+ <sca:intent name="tuscanyIntent_1" 

+ 			 constrains="sca:binding sca:implementation.java">

+ 			 <sca:description>

+ 			 Sample Intent

+ 			 </sca:description>

+ </sca:intent>

+ 

+ <sca:intent name="tuscanyIntent_2" 

+ 			 constrains="sca:binding sca:implementation.java">

+ 			 <sca:description>

+ 			 Sample Intent

+ 			 </sca:description>

+ </sca:intent>

+ 

+ <sca:intent name="tuscanyIntent_3" 

+ 			 constrains="sca:binding sca:implementation.java">

+ 			 <sca:description>

+ 			 Sample Intent

+ 			 </sca:description>

+ </sca:intent>

+ 

+ <sca:intent name="tuscanyIntent_4" 

+ 			 constrains="sca:binding sca:implementation.java">

+ 			 <sca:description>

+ 			 Sample Intent

+ 			 </sca:description>

+ </sca:intent>

+ 

+<sca:intent name="tuscanyIntent_5" 

+ 			 constrains="sca:binding sca:implementation.java">

+ 			 <sca:description>

+ 			 Sample Intent

+ 			 </sca:description>

+ </sca:intent>

+ 

+ <sca:intent name="tuscanyIntent_6" 

+ 			 constrains="sca:binding sca:implementation.java">

+ 			 <sca:description>

+ 			 Sample Intent

+ 			 </sca:description>

+ </sca:intent>

+ 

+ <sca:intent name="tuscanyIntent_7" 

+ 			 constrains="sca:binding sca:implementation.java">

+ 			 <sca:description>

+ 			 Sample Intent

+ 			 </sca:description>

+ </sca:intent>

+ 

+ <sca:intent name="tuscanyIntent_8" 

+ 			 constrains="sca:binding sca:implementation.java">

+ 			 <sca:description>

+ 			 Sample Intent

+ 			 </sca:description>

+ </sca:intent>

+ 

+ <!-- qualified intents -->

+ <sca:intent name="tuscanyIntent_1.qualified" />

+ <sca:intent name="tuscanyIntent_2.qualified" />

+ <sca:intent name="tuscanyIntent_6.qualified1" />

+ <sca:intent name="tuscanyIntent_6.qualified2" />

+ 

+ <sca:policySet name="tuscanyPolicySet_4"

+ 	provides="tuscanyIntent_6"

+ 	appliesTo="/sca:composite/sca:component"

+ 	xmlns="http://test"

+ 	xmlns:wsp="http://schemas.xmlsoap.org/ws/2004/09/policy">

+ 	<sca:intentMap provides="tuscanyIntent_6" default="qualified2">

+        <sca:qualifier name="qualified2">

+            <wsp:Policy>

+                <!-- policy expression and policy subject for "qualified2" alternative" -->

+            </wsp:Policy>

+        </sca:qualifier>

+    </sca:intentMap>

+ </sca:policySet>

+</sca:definitions>
\ No newline at end of file
diff --git a/branches/sca-equinox/modules/implementation-java-xml/src/test/resources/org/apache/tuscany/sca/implementation/java/xml/definitions_with_policysets.xml b/branches/sca-equinox/modules/implementation-java-xml/src/test/resources/org/apache/tuscany/sca/implementation/java/xml/definitions_with_policysets.xml
new file mode 100644
index 0000000000..9147133d5d
--- /dev/null
+++ b/branches/sca-equinox/modules/implementation-java-xml/src/test/resources/org/apache/tuscany/sca/implementation/java/xml/definitions_with_policysets.xml
@@ -0,0 +1,133 @@
+<?xml version="1.0" encoding="ASCII"?>

+<!--

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

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

+ * distributed with this work for additional information

+ * regarding copyright ownership.  The ASF licenses this file

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

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

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

+ * 

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

+ * 

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

+ * software distributed under the License is distributed on an

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

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

+ * specific language governing permissions and limitations

+ * under the License.    

+-->

+<sca:definitions xmlns="http://test"

+ 			targetNamespace="http://test"

+ 			xmlns:sca="http://www.osoa.org/xmlns/sca/1.0">

+

+<!-- simple intent -->

+ <sca:intent name="tuscanyIntent_1" 

+ 			 constrains="sca:binding sca:implementation.java">

+ 			 <sca:description>

+ 			 Sample Intent

+ 			 </sca:description>

+ </sca:intent>

+ 

+ <sca:intent name="tuscanyIntent_2" 

+ 			 constrains="sca:binding sca:implementation.java">

+ 			 <sca:description>

+ 			 Sample Intent

+ 			 </sca:description>

+ </sca:intent>

+ 

+ <sca:intent name="tuscanyIntent_3" 

+ 			 constrains="sca:binding sca:implementation.java">

+ 			 <sca:description>

+ 			 Sample Intent

+ 			 </sca:description>

+ </sca:intent>

+ 

+ <sca:intent name="tuscanyIntent_4" 

+ 			 constrains="sca:binding sca:implementation.java">

+ 			 <sca:description>

+ 			 Sample Intent

+ 			 </sca:description>

+ </sca:intent>

+ 

+<sca:intent name="tuscanyIntent_5" 

+ 			 constrains="sca:binding sca:implementation.java">

+ 			 <sca:description>

+ 			 Sample Intent

+ 			 </sca:description>

+ </sca:intent>

+ 

+ <sca:intent name="tuscanyIntent_6" 

+ 			 constrains="sca:binding sca:implementation.java">

+ 			 <sca:description>

+ 			 Sample Intent

+ 			 </sca:description>

+ </sca:intent>

+ 

+ <sca:intent name="tuscanyIntent_7" 

+ 			 constrains="sca:binding sca:implementation.java">

+ 			 <sca:description>

+ 			 Sample Intent

+ 			 </sca:description>

+ </sca:intent>

+ 

+ <sca:intent name="tuscanyIntent_8" 

+ 			 constrains="sca:binding sca:implementation.java">

+ 			 <sca:description>

+ 			 Sample Intent

+ 			 </sca:description>

+ </sca:intent>

+ 

+ <sca:policySet name="tuscanyPolicySet_1"

+ 	provides="tuscanyIntent_1 tuscanyIntent_2 tuscanyIntent_3"

+ 	appliesTo="/sca:composite/sca:component"

+ 	xmlns="http://test"

+ 	xmlns:wsp="http://schemas.xmlsoap.org/ws/2004/09/policy">

+ </sca:policySet>

+ 

+ <sca:policySet name="tuscanyPolicySet_2"

+ 	provides="tuscanyIntent_4 tuscanyIntent_5"

+ 	appliesTo="/sca:composite/sca:component"

+ 	xmlns="http://test"

+ 	xmlns:wsp="http://schemas.xmlsoap.org/ws/2004/09/policy">

+ </sca:policySet>

+ 

+ <sca:policySet name="tuscanyPolicySet_3"

+ 	provides="tuscanyIntent_6"

+ 	appliesTo="/sca:composite/sca:component"

+ 	xmlns="http://test"

+ 	xmlns:wsp="http://schemas.xmlsoap.org/ws/2004/09/policy">

+ 	<sca:intentMap provides="tuscanyIntent_6" default="qualified1">

+        <sca:qualifier name="qualified1">

+            <wsp:Policy>

+                <!-- policy expression and policy subject for "qualified1" alternative -->

+            </wsp:Policy>

+        </sca:qualifier>

+        <sca:qualifier name="qualifed2">

+            <wsp:Policy>

+                <!-- policy expression and policy subject for "qualified2" alternative" -->

+            </wsp:Policy>

+        </sca:qualifier>

+    </sca:intentMap>

+ </sca:policySet>

+ 

+ <sca:policySet name="tuscanyPolicySet_4"

+ 	provides="tuscanyIntent_6"

+ 	appliesTo="/sca:composite/sca:component"

+ 	xmlns="http://test"

+ 	xmlns:wsp="http://schemas.xmlsoap.org/ws/2004/09/policy">

+ 	<sca:intentMap provides="tuscanyIntent_6" default="qualified2">

+        <sca:qualifier name="qualified2">

+            <wsp:Policy>

+                <!-- policy expression and policy subject for "qualified2" alternative" -->

+            </wsp:Policy>

+        </sca:qualifier>

+    </sca:intentMap>

+ </sca:policySet>

+ 

+  <!-- qualified intents -->

+ <sca:intent name="tuscanyIntent_1.qualified" />

+ <sca:intent name="tuscanyIntent_2.qualified" />

+ <sca:intent name="tuscanyIntent_6.qualified1" />

+ <sca:intent name="tuscanyIntent_6.qualified2" />

+</sca:definitions>
\ No newline at end of file