Create 2.0-M4 release branch

git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@831226 13f79535-47bb-0310-9956-ffa450edef68

21 files changed, 3647 insertions, 0 deletions

diff --git a/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/SpringBeanElement.java b/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/SpringBeanElement.java
new file mode 100644
index 0000000000..f64c5f9476
--- /dev/null
+++ b/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/SpringBeanElement.java
@@ -0,0 +1,117 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * 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.spring;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Represents a <bean> element in a Spring application-context
+ * - this has id and className attributes
+ * - plus zero or more property elements as children
+ *
+ * @version $Rev$ $Date$
+ */
+public class SpringBeanElement {
+
+    private String id;
+    private String className = null;
+    private boolean innerBean = false;
+    private boolean abstractBean = false;
+    private boolean parentAttribute = false;
+    private boolean factoryBeanAttribute = false;
+    private boolean factoryMethodAttribute = false;
+    
+    private List<SpringPropertyElement> properties = new ArrayList<SpringPropertyElement>();
+    private List<SpringConstructorArgElement> constructorargs = new ArrayList<SpringConstructorArgElement>();
+
+    public SpringBeanElement(String id, String className) {
+        this.id = id;
+        this.className = className;
+    }
+
+    public String getClassName() {
+        return className;
+    }
+
+    public String getId() {
+        return id;
+    }
+    
+    public void setId(String id) {
+        this.id = id;
+    }
+
+    public List<SpringPropertyElement> getProperties() {
+        return properties;
+    }
+
+    public void addProperty(SpringPropertyElement property) {
+        properties.add(property);
+    }
+    
+    public List<SpringConstructorArgElement> getCustructorArgs() {
+        return constructorargs;
+    }
+
+    public void addCustructorArgs(SpringConstructorArgElement args) {
+        constructorargs.add(args);
+    }
+    
+    public boolean isInnerBean() {
+        return innerBean;
+    }
+    
+    public void setInnerBean(boolean innerBean) {
+        this.innerBean = innerBean;
+    }
+    
+    public boolean isAbstractBean() {
+        return abstractBean;
+    }
+    
+    public void setAbstractBean(boolean abstractBean) {
+        this.abstractBean = abstractBean;
+    }
+    
+    public boolean hasParentAttribute() {
+        return parentAttribute;
+    }
+    
+    public void setParentAttribute(boolean parentAttribute) {
+        this.parentAttribute = parentAttribute;
+    }
+    
+    public boolean hasFactoryBeanAttribute() {
+        return factoryBeanAttribute;
+    }
+    
+    public void setFactoryBeanAttribute(boolean factoryBeanAttribute) {
+        this.factoryBeanAttribute = factoryBeanAttribute;
+    }
+    
+    public boolean hasFactoryMethodAttribute() {
+        return factoryMethodAttribute;
+    }
+    
+    public void setFactoryMethodAttribute(boolean factoryMethodAttribute) {
+        this.factoryMethodAttribute = factoryMethodAttribute;
+    }
+
+} // end class SpringBeanElement
diff --git a/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/SpringConstructorArgElement.java b/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/SpringConstructorArgElement.java
new file mode 100644
index 0000000000..9ae1273592
--- /dev/null
+++ b/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/SpringConstructorArgElement.java
@@ -0,0 +1,77 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.sca.implementation.spring;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Represents a <constructor-arg> element in a Spring application-context
+ * - this has ref attribute
+ * 
+ * @version $Rev$ $Date$
+ */
+public class SpringConstructorArgElement {
+    
+	private String type;
+    private int autoIndex = -1;
+    private int index = -1;
+    private List<String> refs = new ArrayList<String>();
+    private List<String> values = new ArrayList<String>();
+
+    public SpringConstructorArgElement(String type) {
+        this.type = type;
+    }
+    
+    public String getType() {
+        return this.type;
+    }
+    
+    public List<String> getRefs() {
+        return this.refs;
+    }
+    
+    public void addRef(String ref) {
+        this.refs.add(ref);
+    }
+    
+    public int getIndex() {
+        return this.index;
+    }
+    
+    public void setIndex(int index) {
+        this.index = index;
+    }
+    
+    public int getAutoIndex() {
+        return this.autoIndex;
+    }
+    
+    public void setAutoIndex(int index) {
+        this.autoIndex = index;
+    }
+    
+    public List<String> getValues() {
+        return this.values;
+    }
+
+    public void addValue(String value) {
+        this.values.add(value);
+    }
+}
diff --git a/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/SpringImplementation.java b/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/SpringImplementation.java
new file mode 100644
index 0000000000..8081fb4911
--- /dev/null
+++ b/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/SpringImplementation.java
@@ -0,0 +1,228 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * 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.spring;
+
+import java.net.URL;
+import java.util.Hashtable;
+import java.util.List;
+
+import javax.xml.namespace.QName;
+
+import org.apache.tuscany.sca.assembly.Component;
+import org.apache.tuscany.sca.assembly.ComponentType;
+import org.apache.tuscany.sca.assembly.Extensible;
+import org.apache.tuscany.sca.assembly.Implementation;
+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.interfacedef.InterfaceContract;
+import org.apache.tuscany.sca.runtime.RuntimeComponent;
+
+
+/**
+ * Represents a Spring implementation.
+ *
+ * @version $Rev$ $Date$
+ */
+public class SpringImplementation extends ImplementationImpl implements Implementation, Extensible {
+    public final static QName TYPE = new QName(SCA11_NS, "implementation.spring");
+    // The location attribute which points to the Spring application-context XML file
+    private String location;
+    // The application-context file as a Spring Resource
+    private List<URL> resource;
+    private ComponentType componentType;
+    // Mapping of Services to Beans
+    private Hashtable<String, SpringBeanElement> serviceMap;
+    // Mapping of property names to Java class
+    private Hashtable<String, Class<?>> propertyMap;
+    // List of unresolved bean property references
+    private Hashtable<String, Reference> unresolvedBeanRef;
+    private ClassLoader classLoader;
+
+    public SpringImplementation() {
+        super(TYPE);
+        this.location = null;
+        this.resource = null;
+        setUnresolved(true);
+        serviceMap = new Hashtable<String, SpringBeanElement>();
+        propertyMap = new Hashtable<String, Class<?>>();
+        unresolvedBeanRef = new Hashtable<String, Reference>();
+    } // end method SpringImplementation
+
+    /* Returns the location attribute for this Spring implementation */
+    public String getLocation() {
+        return location;
+    }
+
+    /**
+     * Sets the location attribute for this Spring implementation
+     * location - a URI to the Spring application-context file
+     */
+    public void setLocation(String location) {
+        this.location = location;
+        return;
+    }
+
+    public void setResource(List<URL> resource) {
+        this.resource = resource;
+    }
+
+    public List<URL> getResource() {
+        return resource;
+    }
+
+    /*
+     * Returns the componentType for this Spring implementation
+     */
+    public ComponentType getComponentType() {
+        return componentType;
+    }
+
+    /*
+     * Sets the componentType for this Spring implementation
+     */
+    public void setComponentType(ComponentType componentType) {
+        this.componentType = componentType;
+    }
+
+    @Override
+    public List<Service> getServices() {
+        return componentType.getServices();
+    }
+
+    @Override
+    public List<Reference> getReferences() {
+        return componentType.getReferences();
+    }
+
+    @Override
+    public List<Property> getProperties() {
+        return componentType.getProperties();
+    }
+
+    /**
+     * Returns the Spring Bean which implements a particular service
+     * @param service the service
+     * @return the bean which implements the service, as a SpringBeanElement
+     */
+    public SpringBeanElement getBeanFromService(Service service) {
+        SpringBeanElement theBean = serviceMap.get(service.getName());
+        return theBean;
+    }
+
+    /**
+     * Sets the mapping from a service to the Spring Bean that implements the service
+     * @param service the service
+     * @param theBean a SpringBeanElement for the Bean implementing the service
+     */
+    public void setBeanForService(Service service, SpringBeanElement theBean) {
+        serviceMap.put(service.getName(), theBean);
+    }
+
+    /**
+     * Add a mapping from a SCA property name to a Java class for the property
+     * @param propertyName
+     * @param propertyClass
+     */
+    public void setPropertyClass(String propertyName, Class<?> propertyClass) {
+        if (propertyName == null || propertyClass == null)
+            return;
+        propertyMap.put(propertyName, propertyClass);
+        return;
+    } // end method setPropertyClass
+
+    /**
+     * Gets the Java Class for an SCA property
+     * @param propertyName - the property name
+     * @return - a Class object for the type of the property
+     */
+    public Class<?> getPropertyClass(String propertyName) {
+        return propertyMap.get(propertyName);
+    } // end method getPropertyClass
+
+    public void setUnresolvedBeanRef(String refName, Reference reference) {
+        if (refName == null || reference == null)
+            return;
+        unresolvedBeanRef.put(refName, reference);
+        return;
+    } // end method setUnresolvedBeanRef
+
+    public Reference getUnresolvedBeanRef(String refName) {
+        return unresolvedBeanRef.get(refName);
+    } // end method getUnresolvedBeanRef
+
+
+    /**
+     * Use preProcess to validate and map the references and properties dynamically
+     */
+    public void build(Component component) {
+        if (!(component instanceof RuntimeComponent))
+            return;
+
+        RuntimeComponent rtc = (RuntimeComponent) component;
+
+        for (Reference reference : rtc.getReferences()) {
+            if (unresolvedBeanRef.containsKey(reference.getName())) {
+            	Reference ref = unresolvedBeanRef.get(reference.getName());
+            	componentType.getReferences().add(
+            			createReference(reference, ref.getInterfaceContract()));
+            	unresolvedBeanRef.remove(reference.getName());
+            }
+        }
+
+        for (Property property : rtc.getProperties()) {
+        	if (unresolvedBeanRef.containsKey(property.getName())) {
+        		componentType.getProperties().add(createProperty(property));
+        		this.setPropertyClass(property.getName(), property.getClass());
+        		unresolvedBeanRef.remove(property.getName());
+            }
+        }
+    }
+
+    protected Reference createReference(Reference reference, InterfaceContract interfaze) {
+        Reference newReference;
+        try {
+            newReference = (Reference)reference.clone();
+            if (newReference.getInterfaceContract() == null)
+            	newReference.setInterfaceContract(interfaze);
+        } catch (CloneNotSupportedException e) {
+            throw new AssertionError(e); // should not ever happen
+        }
+        return newReference;
+    }
+
+    protected Property createProperty(Property property) {
+        Property newProperty;
+        try {
+            newProperty = (Property)property.clone();
+        } catch (CloneNotSupportedException e) {
+            throw new AssertionError(e); // should not ever happen
+        }
+        return newProperty;
+    }
+    
+    public ClassLoader getClassLoader() {
+    	return classLoader;
+    }
+
+    public void setClassLoader(ClassLoader classLoader) {
+    	this.classLoader = classLoader;
+    }
+}
\ No newline at end of file
diff --git a/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/SpringImplementationBuilder.java b/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/SpringImplementationBuilder.java
new file mode 100644
index 0000000000..1a246fa03a
--- /dev/null
+++ b/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/SpringImplementationBuilder.java
@@ -0,0 +1,41 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.implementation.spring;
+
+import javax.xml.namespace.QName;
+
+import org.apache.tuscany.sca.assembly.Component;
+import org.apache.tuscany.sca.assembly.builder.BuilderContext;
+import org.apache.tuscany.sca.assembly.builder.ImplementationBuilder;
+
+/**
+ * 
+ */
+public class SpringImplementationBuilder implements ImplementationBuilder<SpringImplementation> {
+
+    public void build(Component component, SpringImplementation implmentation, BuilderContext context) {
+        implmentation.build(component);
+    }
+
+    public QName getImplementationType() {
+        return SpringImplementation.TYPE;
+    }
+
+}
diff --git a/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/SpringImplementationConstants.java b/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/SpringImplementationConstants.java
new file mode 100644
index 0000000000..caae72fa90
--- /dev/null
+++ b/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/SpringImplementationConstants.java
@@ -0,0 +1,73 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.implementation.spring;
+
+import javax.xml.namespace.QName;
+
+/**
+ * Constants used in Spring Application Context XML files.
+ */
+public interface SpringImplementationConstants {
+    
+    String SCA_NS = "http://www.springframework.org/schema/sca";
+    String SPRING_NS = "http://www.springframework.org/schema/beans";
+    
+    String PROPERTY = "property";
+    QName SCA_PROPERTY_ELEMENT = new QName(SCA_NS, PROPERTY);
+    QName PROPERTY_ELEMENT = new QName(SPRING_NS, PROPERTY);
+    
+    String SCASERVICE = "service";
+    QName SCA_SERVICE_ELEMENT = new QName(SCA_NS, SCASERVICE);
+    
+    String SCAREFERENCE = "reference";
+    QName SCA_REFERENCE_ELEMENT = new QName(SCA_NS, SCAREFERENCE);
+    
+    String BEANS = "beans";
+    QName BEANS_ELEMENT = new QName(SPRING_NS, BEANS);
+    
+    String IMPORT = "import";
+    QName IMPORT_ELEMENT = new QName(SPRING_NS, IMPORT);
+    
+    String BEAN = "bean";
+    QName BEAN_ELEMENT = new QName(SPRING_NS, BEAN);
+    
+    String CONSTRUCTORARG = "constructor-arg";
+    QName CONSTRUCTORARG_ELEMENT = new QName(SPRING_NS, CONSTRUCTORARG);
+    
+    String LIST = "list";
+    QName LIST_ELEMENT = new QName(SPRING_NS, LIST); 
+    
+    String SET = "set";
+    QName SET_ELEMENT = new QName(SPRING_NS, SET);
+    
+    String MAP = "map";
+    QName MAP_ELEMENT = new QName(SPRING_NS, MAP);
+    
+    String VALUE = "value";
+    QName VALUE_ELEMENT = new QName(SPRING_NS, VALUE);
+    
+    String REF = "ref";
+    QName REF_ELEMENT = new QName(SPRING_NS, REF);
+    
+    String ENTRY = "entry";
+    QName ENTRY_ELEMENT = new QName(SPRING_NS, ENTRY);
+
+    String APPLICATION_CONTEXT = "application-context.xml";
+}
diff --git a/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/SpringPropertyElement.java b/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/SpringPropertyElement.java
new file mode 100644
index 0000000000..37b8ef37a6
--- /dev/null
+++ b/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/SpringPropertyElement.java
@@ -0,0 +1,60 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * 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.spring;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Represents a <property> element in a Spring application-context
+ * - this has name and ref attributes
+ * 
+ * @version $Rev$ $Date$
+ */
+public class SpringPropertyElement {
+
+    private String name;
+    private List<String> refs = new ArrayList<String>();
+    private List<String> values = new ArrayList<String>();
+
+    public SpringPropertyElement(String name) {
+        this.name = name;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public List<String> getRefs() {
+        return this.refs;
+    }
+    
+    public void addRef(String ref) {
+        this.refs.add(ref);
+    }
+    
+    public List<String> getValues() {
+        return this.values;
+    }
+
+    public void addValue(String value) {
+        this.values.add(value);
+    }
+    
+} // end class SpringPropertyElement
diff --git a/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/SpringSCAPropertyElement.java b/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/SpringSCAPropertyElement.java
new file mode 100644
index 0000000000..b192580a78
--- /dev/null
+++ b/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/SpringSCAPropertyElement.java
@@ -0,0 +1,52 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * 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.spring;
+
+/**
+ * Represents an <sca:property> element in a Spring application-context
+ * - this has name and type attributes
+ * @version $Rev$ $Date$ 
+ */
+public class SpringSCAPropertyElement {
+
+    private String name;
+    private String type;
+
+    public SpringSCAPropertyElement(String name, String type) {
+        this.name = name;
+        this.type = type;
+    }
+    
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getName() {
+        return name;
+    }
+    
+    public void setType(String type) {
+        this.type = type;
+    }
+
+    public String getType() {
+        return type;
+    }
+
+} // end class SpringPropertyElement
diff --git a/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/SpringSCAReferenceElement.java b/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/SpringSCAReferenceElement.java
new file mode 100644
index 0000000000..bc010229ad
--- /dev/null
+++ b/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/SpringSCAReferenceElement.java
@@ -0,0 +1,78 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.sca.implementation.spring;
+
+import java.util.ArrayList;
+import java.util.List;
+import org.apache.tuscany.sca.policy.Intent;
+import org.apache.tuscany.sca.policy.PolicySet;
+
+/**
+ * Represents a <sca:reference> element in a Spring application-context
+ * - this has id and className attributes
+ * - plus zero or more property elements as children
+ *
+ * @version $Rev$ $Date$
+ */
+public class SpringSCAReferenceElement {
+
+    private String name;
+    private String type;
+    private String defaultBean;
+    private List<Intent> intents = new ArrayList<Intent>();
+    private List<PolicySet> policySets = new ArrayList<PolicySet>();
+
+    public SpringSCAReferenceElement(String name, String type) {
+        this.name = name;
+        this.type = type;
+    }
+    
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getName() {
+        return name;
+    }
+    
+    public void setType(String type) {
+        this.type = type;
+    }
+
+    public String getType() {
+        return type;
+    }
+    
+    public void setDefaultBean(String defaultBean) {
+        this.defaultBean = defaultBean;
+    }
+
+    public String getDefaultBean() {
+        return defaultBean;
+    }
+    
+    public List<Intent> getRequiredIntents() {
+        return intents;
+    }
+    
+    public List<PolicySet> getPolicySets() {   	
+    	return policySets;
+    }
+
+} // end class SpringSCAReferenceElement
diff --git a/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/SpringSCAServiceElement.java b/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/SpringSCAServiceElement.java
new file mode 100644
index 0000000000..dbddc00b33
--- /dev/null
+++ b/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/SpringSCAServiceElement.java
@@ -0,0 +1,78 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.sca.implementation.spring;
+
+import java.util.ArrayList;
+import java.util.List;
+import org.apache.tuscany.sca.policy.Intent;
+import org.apache.tuscany.sca.policy.PolicySet;
+
+/**
+ * Represents a <sca:service> element in a Spring application-context
+ * - this has id and className attributes
+ * - plus zero or more property elements as children
+ *
+ * @version $Rev$ $Date$
+ */
+public class SpringSCAServiceElement {
+
+    private String name;
+    private String type;
+    private String target;
+    private List<Intent> intents = new ArrayList<Intent>();
+    private List<PolicySet> policySets = new ArrayList<PolicySet>();
+
+    public SpringSCAServiceElement(String name, String target) {
+        this.name = name;
+        this.target = target;
+    }
+    
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getName() {
+        return name;
+    }
+    
+    public void setType(String type) {
+        this.type = type;
+    }
+
+    public String getType() {
+        return type;
+    }
+    
+    public void setTarget(String target) {
+        this.target = target;
+    }
+
+    public String getTarget() {
+        return target;
+    }
+    
+    public List<Intent> getRequiredIntents() {
+        return intents;
+    }
+    
+    public List<PolicySet> getPolicySets() {   	
+    	return policySets;
+    }
+
+} // end class SpringSCAServiceElement
diff --git a/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/introspect/SpringBeanIntrospector.java b/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/introspect/SpringBeanIntrospector.java
new file mode 100644
index 0000000000..3aa257686d
--- /dev/null
+++ b/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/introspect/SpringBeanIntrospector.java
@@ -0,0 +1,99 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.sca.implementation.spring.introspect;
+
+import java.util.List;
+
+import org.apache.tuscany.sca.assembly.ComponentType;
+import org.apache.tuscany.sca.contribution.processor.ContributionResolveException;
+import org.apache.tuscany.sca.core.ExtensionPointRegistry;
+import org.apache.tuscany.sca.core.FactoryExtensionPoint;
+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.spring.SpringConstructorArgElement;
+
+/**
+ * Provides introspection functions for Spring beans
+ * This version leans heavily on the implementation-java classes
+ *
+ * @version $Rev$ $Date$
+ */
+public class SpringBeanIntrospector {
+
+    private JavaImplementationFactory javaImplementationFactory;
+
+    /**
+     * The constructor sets up the various visitor elements that will be used to introspect
+     * the Spring bean and extract SCA information.
+     *
+     * @param assemblyFactory The Assembly Factory to use
+     * @param javaFactory The Java Interface Factory to use
+     * @param policyFactory The Policy Factory to use.
+     */
+    public SpringBeanIntrospector(ExtensionPointRegistry registry,
+                                  List<SpringConstructorArgElement> conArgs) {
+
+        FactoryExtensionPoint factories = registry.getExtensionPoint(FactoryExtensionPoint.class);
+        javaImplementationFactory = factories.getFactory(JavaImplementationFactory.class);
+    } // end constructor 
+
+    /**
+     * Introspect a Spring Bean and extract the features important to SCA
+     * @param beanClass the Spring Bean class to introspect
+     * @param componentType the componentType that is filled in through the introspection
+     * process (assumed empty on invocation, filled on return
+     * @return a Map of property names to JavaElementImpl
+     * @throws ContributionResolveException - if there was a problem resolving the
+     * Spring Bean or its componentType
+     *
+     */
+    public JavaImplementation introspectBean(Class<?> beanClass, ComponentType componentType) throws ContributionResolveException 
+    {
+        if (componentType == null)
+            throw new ContributionResolveException("Introspect Spring bean: supplied componentType is null");
+
+        // Create a Java implementation ready for the introspection
+        JavaImplementation javaImplementation = javaImplementationFactory.createJavaImplementation();
+
+        try {
+            // Introspect the bean...the results of the introspection are placed into the Java implementation
+            javaImplementationFactory.createJavaImplementation(javaImplementation, beanClass);
+
+            // Extract the services, references & properties found through introspection
+            // put the services, references and properties into the component type
+            componentType.getServices().addAll(javaImplementation.getServices());
+            componentType.getReferences().addAll(javaImplementation.getReferences());
+            componentType.getProperties().addAll(javaImplementation.getProperties());
+            
+        } catch (IntrospectionException e) {
+            throw new ContributionResolveException(e);
+        } // end try
+
+        /* List<Service> services = javaImplementation.getServices();
+        for (Service service : services) {
+            String name = service.getName();
+            System.out.println("Spring Bean: found service with name: " + name);
+        } // end for */
+        
+        return javaImplementation;
+
+    } // end method introspectBean
+
+} // end class SpringBeanIntrospector
diff --git a/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/introspect/SpringBeanPojoProcessor.java b/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/introspect/SpringBeanPojoProcessor.java
new file mode 100644
index 0000000000..3a8eec99fa
--- /dev/null
+++ b/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/introspect/SpringBeanPojoProcessor.java
@@ -0,0 +1,660 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * 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.spring.introspect;
+
+import static org.apache.tuscany.sca.implementation.java.introspect.JavaIntrospectionHelper.getAllInterfaces;
+import static org.apache.tuscany.sca.implementation.java.introspect.JavaIntrospectionHelper.getAllPublicAndProtectedFields;
+import static org.apache.tuscany.sca.implementation.java.introspect.JavaIntrospectionHelper.getAllUniquePublicProtectedMethods;
+import static org.apache.tuscany.sca.implementation.java.introspect.JavaIntrospectionHelper.getPrivateFields;
+import static org.apache.tuscany.sca.implementation.java.introspect.JavaIntrospectionHelper.toPropertyName;
+
+import java.lang.annotation.Annotation;
+import java.lang.reflect.Constructor;
+import java.lang.reflect.Field;
+import java.lang.reflect.Member;
+import java.lang.reflect.Method;
+import java.lang.reflect.Modifier;
+import java.lang.reflect.Type;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import javax.jws.WebService;
+
+import org.apache.tuscany.sca.assembly.AssemblyFactory;
+import org.apache.tuscany.sca.assembly.Contract;
+import org.apache.tuscany.sca.assembly.Multiplicity;
+import org.apache.tuscany.sca.core.ExtensionPointRegistry;
+import org.apache.tuscany.sca.implementation.java.IntrospectionException;
+import org.apache.tuscany.sca.implementation.java.JavaConstructorImpl;
+import org.apache.tuscany.sca.implementation.java.JavaElementImpl;
+import org.apache.tuscany.sca.implementation.java.JavaImplementation;
+import org.apache.tuscany.sca.implementation.java.JavaParameterImpl;
+import org.apache.tuscany.sca.implementation.java.introspect.BaseJavaClassVisitor;
+import org.apache.tuscany.sca.implementation.java.introspect.JavaIntrospectionHelper;
+import org.apache.tuscany.sca.implementation.java.introspect.impl.AmbiguousConstructorException;
+import org.apache.tuscany.sca.implementation.java.introspect.impl.InvalidServiceTypeException;
+import org.apache.tuscany.sca.implementation.java.introspect.impl.NoConstructorException;
+import org.apache.tuscany.sca.implementation.java.introspect.impl.Resource;
+import org.apache.tuscany.sca.implementation.spring.SpringConstructorArgElement;
+import org.apache.tuscany.sca.interfacedef.Interface;
+import org.apache.tuscany.sca.interfacedef.InvalidInterfaceException;
+import org.apache.tuscany.sca.interfacedef.java.JavaInterface;
+import org.apache.tuscany.sca.interfacedef.java.JavaInterfaceContract;
+import org.apache.tuscany.sca.interfacedef.java.JavaInterfaceFactory;
+import org.apache.tuscany.sca.interfacedef.util.JavaXMLMapper;
+import org.oasisopen.sca.annotation.Callback;
+import org.oasisopen.sca.annotation.Context;
+import org.oasisopen.sca.annotation.Property;
+import org.oasisopen.sca.annotation.Reference;
+import org.oasisopen.sca.annotation.Remotable;
+
+/**
+ * Heuristically evaluates an un-annotated Java implementation type to determine
+ * services, references, and properties according to the algorithm described in
+ * the SCA Java Client and Implementation Model Specification <p/> TODO
+ * Implement: <p/> When no service interface is annotated, need to calculate a
+ * single service comprising all public methods that are not reference or
+ * property injection sites. If that service can be exactly mapped to an
+ * interface implemented by the class then the service interface will be defined
+ * in terms of that interface.
+ * 
+ * @version $Rev$ $Date$
+ */
+public class SpringBeanPojoProcessor extends BaseJavaClassVisitor {
+    private List<SpringConstructorArgElement> conArgs;
+
+    public SpringBeanPojoProcessor(AssemblyFactory assemblyFactory, JavaInterfaceFactory javaFactory, List<SpringConstructorArgElement> conArgs) {
+        super(assemblyFactory);
+        this.javaInterfaceFactory = javaFactory;
+        this.conArgs = conArgs;
+    }
+    
+    public SpringBeanPojoProcessor(ExtensionPointRegistry registry) {
+        super(registry);
+    }
+
+    @Override
+    public <T> void visitEnd(Class<T> clazz, JavaImplementation type) throws IntrospectionException {
+        List<org.apache.tuscany.sca.assembly.Service> services = type.getServices();
+        if (services.isEmpty()) {
+            // heuristically determine the service
+            /**
+             * The following is quoted from Java Specification 1.2.1.3. Introspecting services offered by a Java implementation
+             * In the cases described below, the services offered by a Java implementation class may be determined
+             * through introspection, eliding the need to specify them using @Service. The following algorithm is used 
+             * to determine how services are introspected from an implementation class:
+             * 
+             * If the interfaces of the SCA services are not specified with the @Service annotation on the 
+             * implementation class, it is assumed that all implemented interfaces that have been annotated 
+             * as @Remotable are the service interfaces provided by the component. If none of the implemented 
+             * interfaces is remotable, then by default the implementation offers a single service whose type 
+             * is the implementation class.
+             */
+            Set<Class<?>> interfaces = getAllInterfaces(clazz);
+            for (Class<?> i : interfaces) {
+                if (i.isAnnotationPresent(Remotable.class) || i.isAnnotationPresent(WebService.class)) {
+                    addService(type, i);
+                }
+            }
+            if (services.isEmpty()) {
+                // class is the interface
+                addService(type, clazz);
+            }
+        }
+        Set<Method> methods = getAllUniquePublicProtectedMethods(clazz, false);
+        if (!type.getReferenceMembers().isEmpty() || !type.getPropertyMembers().isEmpty()) {
+            // references and properties have been explicitly defined
+            //            if (type.getServices().isEmpty()) {
+            //                calculateServiceInterface(clazz, type, methods);
+            //                if (type.getServices().isEmpty()) {
+            //                    throw new ServiceTypeNotFoundException(clazz.getName());
+            //                }
+            //            }
+            evaluateConstructor(type, clazz);
+            return;
+        }
+        calcPropRefs(methods, services, type, clazz);
+        evaluateConstructor(type, clazz);
+    }
+
+    private void addService(JavaImplementation type, Class<?> clazz) throws IntrospectionException {
+        try {
+            org.apache.tuscany.sca.assembly.Service service = createService(clazz);
+            type.getServices().add(service);
+        } catch (InvalidInterfaceException e) {
+            throw new IntrospectionException(e);
+        }
+    }
+
+    private boolean isPublicSetter(Method method) {
+        return method.getParameterTypes().length == 1 && Modifier.isPublic(method.getModifiers())
+            && method.getName().startsWith("set")
+            && method.getReturnType() == void.class;
+    }
+
+    private boolean isProtectedSetter(Method method) {
+        return method.getParameterTypes().length == 1 && Modifier.isProtected(method.getModifiers())
+            && method.getName().startsWith("set")
+            && method.getReturnType() == void.class;
+    }
+
+    private <T> void calcPropRefs(Set<Method> methods,
+                                  List<org.apache.tuscany.sca.assembly.Service> services,
+                                  JavaImplementation type,
+                                  Class<T> clazz) throws IntrospectionException {
+        // heuristically determine the properties references
+        // make a first pass through all public methods with one param
+        Set<String> setters = new HashSet<String>();
+        Set<String> others = new HashSet<String>();
+        for (Method method : methods) {
+            if (!isPublicSetter(method)) {
+                continue;
+            }
+            if (method.isAnnotationPresent(Callback.class) || method.isAnnotationPresent(Context.class)) {
+                // Add the property name as others
+                others.add(toPropertyName(method.getName()));
+                continue;
+            }
+            if (!isInServiceInterface(method, services)) {
+                // Not part of the service interface
+                String name = toPropertyName(method.getName());
+                setters.add(name);
+                // avoid duplicate property or ref names
+                if (!type.getPropertyMembers().containsKey(name) && !type.getReferenceMembers().containsKey(name)) {
+                    Class<?> param = method.getParameterTypes()[0];
+                    Type genericType = method.getGenericParameterTypes()[0];
+                    if (isReferenceType(param, genericType)) {
+                        type.getReferences().add(createReference(name, param));
+                        type.getReferenceMembers().put(name, new JavaElementImpl(method, 0));
+                    } else {
+                        type.getProperties().add(createProperty(name, param));
+                        type.getPropertyMembers().put(name, new JavaElementImpl(method, 0));
+                    }
+                }
+            }
+        }
+        // second pass for protected methods with one param
+        for (Method method : methods) {
+            if (!isProtectedSetter(method)) {
+                continue;
+            }
+            if (method.isAnnotationPresent(Callback.class) || method.isAnnotationPresent(Context.class)) {
+                // Add the property name as others
+                others.add(toPropertyName(method.getName()));
+                continue;
+            }
+            Class<?> param = method.getParameterTypes()[0];
+            String name = toPropertyName(method.getName());
+            setters.add(name);
+            // avoid duplicate property or ref names
+            if (isReferenceType(param, method.getGenericParameterTypes()[0])) {
+                if (!type.getReferenceMembers().containsKey(name)) {
+                    type.getReferences().add(createReference(name, param));
+                    type.getReferenceMembers().put(name, new JavaElementImpl(method, 0));
+                }
+            } else {
+                if (!type.getPropertyMembers().containsKey(name)) {
+                    type.getProperties().add(createProperty(name, param));
+                    type.getPropertyMembers().put(name, new JavaElementImpl(method, 0));
+                }
+            }
+        }
+
+        // Public or protected fields unless there is a public or protected
+        // setter method
+        // for the same name
+        Set<Field> fields = getAllPublicAndProtectedFields(clazz, false);
+        for (Field field : fields) {
+            if (field.isAnnotationPresent(Callback.class) || field.isAnnotationPresent(Context.class)) {
+                continue;
+            }
+            if (setters.contains(field.getName()) || others.contains(field.getName())) {
+                continue;
+            }
+            String name = field.getName();
+            Class<?> paramType = field.getType();
+            if (isReferenceType(paramType, field.getGenericType())) {
+                if (!type.getReferenceMembers().containsKey(name)) {
+                    type.getReferences().add(createReference(name, paramType));
+                    type.getReferenceMembers().put(name, new JavaElementImpl(field));
+                }
+            } else {
+                if (!type.getPropertyMembers().containsKey(name)) {
+                    type.getProperties().add(createProperty(name, paramType));
+                    type.getPropertyMembers().put(name, new JavaElementImpl(field));
+                }
+            }
+        }
+        
+        // Private fields unless there is a public or protected
+        // setter method for the same name
+        Set<Field> privateFields = getPrivateFields(clazz);
+        for (Field field : privateFields) {
+            if (field.isAnnotationPresent(Callback.class) || field.isAnnotationPresent(Context.class)) {
+                continue;
+            }
+            if (setters.contains(field.getName()) || others.contains(field.getName())) {
+                continue;
+            }
+            String name = field.getName();
+            Class<?> paramType = field.getType();
+            if (isReferenceType(paramType, field.getGenericType())) {
+                if (!type.getReferenceMembers().containsKey(name)) {
+                    type.getReferences().add(createReference(name, paramType));
+                    type.getReferenceMembers().put(name, new JavaElementImpl(field));
+                }
+            } else {
+                if (!type.getPropertyMembers().containsKey(name)) {
+                    type.getProperties().add(createProperty(name, paramType));
+                    type.getPropertyMembers().put(name, new JavaElementImpl(field));
+                }
+            }
+        }
+    }
+
+    /**
+     * Determines the constructor to use based on the component type's
+     * references and properties
+     * 
+     * @param type the component type
+     * @param clazz the implementation class corresponding to the component type
+     * @throws NoConstructorException if no suitable constructor is found
+     * @throws AmbiguousConstructorException if the parameters of a constructor
+     *             cannot be unambiguously mapped to references and properties
+     */
+    @SuppressWarnings("unchecked")
+    private <T> void evaluateConstructor(JavaImplementation type, Class<T> clazz) throws IntrospectionException {
+        // determine constructor if one is not annotated
+        JavaConstructorImpl<?> definition = type.getConstructor();
+        Map<String, JavaElementImpl> props = type.getPropertyMembers();
+        Map<String, JavaElementImpl> refs = type.getReferenceMembers();        
+        Constructor constructor;
+        boolean explict = false;
+        if (definition != null && definition.getConstructor()
+            .isAnnotationPresent(org.oasisopen.sca.annotation.Constructor.class)) {
+            // the constructor was already defined explicitly
+            return;
+        } else if (definition != null) {
+            explict = true;
+            constructor = definition.getConstructor();
+        } else {
+            // no definition, heuristically determine constructor
+            Constructor[] constructors = clazz.getConstructors();
+            if (constructors.length == 0) {
+                throw new NoConstructorException("No public constructor for class");
+            } else if (constructors.length == 1) {
+                // Only one constructor, take it
+                constructor = constructors[0];
+            } else {
+                // multiple constructors scenario
+                Constructor<T> selected = null;                
+                for (Constructor<T> ctor : constructors) {
+                    if (ctor.getParameterTypes().length == 0) {
+                        selected = ctor;
+                    } else if (ctor.getParameterTypes().length == conArgs.size()) {
+                        // we will find a constructor which has atleast one
+                    	// reference or property as its parameter types.
+                    	Class<?>[] parametersTypes = ctor.getParameterTypes();
+                		for (Class<?> pType: parametersTypes) {
+                			for (JavaElementImpl property : props.values()) {            				
+                				if (pType.equals(property.getType())) 
+                					selected = ctor;
+                			}
+                			for (JavaElementImpl reference : refs.values()) {
+                				if (pType.equals(reference.getType())) 
+                					selected = ctor;
+                			}               			           			
+                		}
+                    }
+                }
+                if (selected == null) {
+                    throw new NoConstructorException();
+                }
+                constructor = selected;
+            }
+            definition = type.getConstructors().get(constructor);
+            type.setConstructor(definition);
+        }
+        
+        JavaParameterImpl[] parameters = definition.getParameters();
+        if (parameters.length == 0) {
+            return;
+        }
+        
+        Annotation[][] annotations = constructor.getParameterAnnotations();
+        if (!explict) {
+            // the constructor wasn't defined by an annotation, so check to see
+            // if any of the params have an annotation
+            // which we can impute as explicitly defining the constructor, e.g.
+            // @Property, @Reference, or @Autowire
+            explict = injectionAnnotationsPresent(annotations);
+        }
+        if (explict) {
+            for (int i = 0; i < parameters.length; i++) {
+                if (isAnnotated(parameters[i])) {
+                    continue;
+                } else if (!findReferenceOrProperty(parameters[i], props, refs)) {
+                    throw new AmbiguousConstructorException(parameters[i].toString());
+                }
+            }
+        } else {
+            if (!areUnique(parameters)) {
+                throw new AmbiguousConstructorException("Cannot resolve non-unique parameter types, use @Constructor");
+            }
+            if (!calcPropRefUniqueness(props.values(), refs.values())) {
+                throw new AmbiguousConstructorException("Cannot resolve non-unique parameter types, use @Constructor");
+            }
+            if (!(props.isEmpty() && refs.isEmpty())) {
+                calcParamNames(parameters, props, refs);
+            } else {
+                heuristicParamNames(type, parameters);
+
+            }
+        }
+    }
+
+    private void calcParamNames(JavaParameterImpl[] parameters,
+                                Map<String, JavaElementImpl> props,
+                                Map<String, JavaElementImpl> refs) throws AmbiguousConstructorException {
+        // the constructor param types must unambiguously match defined
+        // reference or property types
+        for (JavaParameterImpl param : parameters) {
+            if (!findReferenceOrProperty(param, props, refs)) {
+                throw new AmbiguousConstructorException(param.getName());
+            }
+        }
+    }
+
+    private void heuristicParamNames(JavaImplementation type, JavaParameterImpl[] parameters)
+        throws IntrospectionException {
+        // heuristically determine refs and props from the parameter types
+        for (JavaParameterImpl p : parameters) {
+            String name = p.getType().getSimpleName().toLowerCase();
+            if (isReferenceType(p.getType(), p.getGenericType())) {
+                type.getReferences().add(createReference(name, p.getType()));
+                p.setClassifer(Reference.class);
+                type.getReferenceMembers().put(name, p);
+            } else {
+                type.getProperties().add(createProperty(name, p.getType()));
+                p.setClassifer(Property.class);
+                type.getPropertyMembers().put(name, p);
+            }
+            p.setName(name);
+        }
+    }
+
+    private static boolean areUnique(Class[] collection) {
+        Set<Class> set = new HashSet<Class>(Arrays.asList(collection));
+        return set.size() == collection.length;
+    }
+
+    /**
+     * Returns true if the union of the given collections of properties and
+     * references have unique Java types
+     */
+    private boolean calcPropRefUniqueness(Collection<JavaElementImpl> props, Collection<JavaElementImpl> refs) {
+
+        Class[] classes = new Class[props.size() + refs.size()];
+        int i = 0;
+        for (JavaElementImpl property : props) {
+            classes[i] = property.getType();
+            i++;
+        }
+        for (JavaElementImpl reference : refs) {
+            classes[i] = reference.getType();
+            i++;
+        }
+        return areUnique(classes);
+    }
+
+    /**
+     * Unambiguously finds the reference or property associated with the given
+     * type
+     * 
+     * @return the name of the reference or property if found, null if not
+     * @throws AmbiguousConstructorException if the constructor parameter cannot
+     *             be resolved to a property or reference
+     */
+    private boolean findReferenceOrProperty(JavaParameterImpl parameter,
+                                            Map<String, JavaElementImpl> props,
+                                            Map<String, JavaElementImpl> refs) throws AmbiguousConstructorException {
+
+        boolean found = false;
+        if (!"".equals(parameter.getName())) {
+            // Match by name
+            JavaElementImpl prop = props.get(parameter.getName());
+            if (prop != null && prop.getType() == parameter.getType()) {
+                parameter.setClassifer(Property.class);
+                return true;
+            }
+            JavaElementImpl ref = refs.get(parameter.getName());
+            if (ref != null && ref.getType() == parameter.getType()) {
+                parameter.setClassifer(Reference.class);
+                return true;
+            }
+        }
+        for (JavaElementImpl property : props.values()) {
+            if (property.getType() == parameter.getType()) {
+                if (found) {
+                    throw new AmbiguousConstructorException("Ambiguous property or reference for constructor type",
+                                                            (Member)parameter.getAnchor());
+                }
+                parameter.setClassifer(Property.class);
+                parameter.setName(property.getName());
+                found = true;
+                // do not break since ambiguities must be checked, i.e. more
+                // than one prop or ref of the same type
+            }
+        }
+        for (JavaElementImpl reference : refs.values()) {
+            if (reference.getType() == parameter.getType()) {
+                if (found) {
+                    throw new AmbiguousConstructorException("Ambiguous property or reference for constructor type",
+                                                            (Member)parameter.getAnchor());
+                }
+                parameter.setClassifer(Reference.class);
+                parameter.setName(reference.getName());
+                found = true;
+                // do not break since ambiguities must be checked, i.e. more
+                // than one prop or ref of the same type
+            }
+        }
+        return found;
+    }
+
+    /**
+     * Returns true if a given type is reference according to the SCA
+     * specification rules for determining reference types The following rules
+     * are used to determine whether an unannotated field or setter method is a
+     * property or reference:
+     * <ol>
+     * <li>If its type is simple, then it is a property.
+     * <li>If its type is complex, then if the type is an interface marked by
+     * 
+     * @Remotable, then it is a reference; otherwise, it is a property.
+     *             <li>Otherwise, if the type associated with the member is an
+     *             array or a java.util.Collection, the basetype is the element
+     *             type of the array or the parameterized type of the
+     *             Collection; otherwise the basetype is the member type. If the
+     *             basetype is an interface with an
+     * @Remotable or
+     * @Service annotation then the member is defined as a reference. Otherwise,
+     *          it is defined as a property.
+     *          </ol>
+     *          <p>
+     *          The name of the reference or of the property is derived from the
+     *          name found on the setter method or on the field.
+     */
+    private boolean isReferenceType(Class<?> cls, Type genericType) {
+        Class<?> baseType = JavaIntrospectionHelper.getBaseType(cls, genericType);
+        return baseType.isInterface() && baseType.isAnnotationPresent(Remotable.class);
+    }
+
+    /**
+     * Returns true if the given operation is defined in the collection of
+     * service interfaces
+     */
+    private boolean isInServiceInterface(Method operation, List<org.apache.tuscany.sca.assembly.Service> services) {
+        for (org.apache.tuscany.sca.assembly.Service service : services) {
+            Interface interface1 = service.getInterfaceContract().getInterface();
+            if (interface1 instanceof JavaInterface) {
+                Class<?> clazz = ((JavaInterface)interface1).getJavaClass();
+                if (isMethodMatched(clazz, operation)) {
+                    return true;
+                }
+            }
+        }
+        return false;
+    }
+
+    /**
+     * Test if the class declares a method which matches the signature of the
+     * given method
+     * 
+     * @param clazz
+     * @param method
+     * @return
+     */
+    private boolean isMethodMatched(Class<?> clazz, Method method) {
+        if (method.getDeclaringClass() == clazz) {
+            return true;
+        }
+        Method[] methods = clazz.getMethods();
+        for (Method m : methods) {
+            if (JavaIntrospectionHelper.exactMethodMatch(method, m)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    /**
+     * Creates a mapped property.
+     * 
+     * @param name the property name
+     * @param paramType the property type
+     */
+    private org.apache.tuscany.sca.assembly.Property createProperty(String name, Class<?> paramType) {
+        org.apache.tuscany.sca.assembly.Property property = assemblyFactory.createProperty();
+        property.setName(name);
+        property.setXSDType(JavaXMLMapper.getXMLType(paramType));
+        return property;
+    }
+
+    private boolean isAnnotated(JavaParameterImpl parameter) {
+        for (Annotation annotation : parameter.getAnnotations()) {
+            Class<? extends Annotation> annotType = annotation.annotationType();
+            if (annotType.equals(Property.class) || annotType.equals(Reference.class)
+                || annotType.equals(Resource.class)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    public boolean areUnique(JavaParameterImpl[] parameters) {
+        Set<Class> set = new HashSet<Class>(parameters.length);
+        for (JavaParameterImpl p : parameters) {
+            if (!set.add(p.getType())) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    public org.apache.tuscany.sca.assembly.Reference createReference(String name, Class<?> paramType)
+        throws IntrospectionException {
+        org.apache.tuscany.sca.assembly.Reference reference = assemblyFactory.createReference();
+        reference.setName(name);
+        JavaInterfaceContract interfaceContract = javaInterfaceFactory.createJavaInterfaceContract();
+        reference.setInterfaceContract(interfaceContract);
+        try {
+            JavaInterface callInterface = javaInterfaceFactory.createJavaInterface(paramType);
+            reference.getInterfaceContract().setInterface(callInterface);
+            if (callInterface.getCallbackClass() != null) {
+                JavaInterface callbackInterface = javaInterfaceFactory.createJavaInterface(callInterface.getCallbackClass());
+                reference.getInterfaceContract().setCallbackInterface(callbackInterface);
+            }
+            reference.setMultiplicity(Multiplicity.ZERO_ONE);
+        } catch (InvalidInterfaceException e1) {
+            throw new IntrospectionException(e1);
+        }
+
+        // FIXME:  This part seems to have already been taken care above!!
+        try {
+            processCallback(paramType, reference);
+        } catch (InvalidServiceTypeException e) {
+            throw new IntrospectionException(e);
+        }
+        return reference;
+    }
+
+    public org.apache.tuscany.sca.assembly.Service createService(Class<?> interfaze) throws InvalidInterfaceException {
+        org.apache.tuscany.sca.assembly.Service service = assemblyFactory.createService();
+        service.setName(interfaze.getSimpleName());
+
+        JavaInterfaceContract interfaceContract = javaInterfaceFactory.createJavaInterfaceContract();
+        service.setInterfaceContract(interfaceContract);
+
+        JavaInterface callInterface = javaInterfaceFactory.createJavaInterface(interfaze);
+        service.getInterfaceContract().setInterface(callInterface);
+        if (callInterface.getCallbackClass() != null) {
+            JavaInterface callbackInterface = javaInterfaceFactory.createJavaInterface(callInterface.getCallbackClass());
+            service.getInterfaceContract().setCallbackInterface(callbackInterface);
+        }
+
+        Interface javaInterface = service.getInterfaceContract().getInterface();
+        javaInterface.setRemotable(interfaze.getAnnotation(Remotable.class) != null);
+        service.getInterfaceContract().setInterface(javaInterface);
+        return service;
+    }
+
+    public void processCallback(Class<?> interfaze, Contract contract) throws InvalidServiceTypeException {
+        Callback callback = interfaze.getAnnotation(Callback.class);
+        if (callback != null && !Void.class.equals(callback.value())) {
+            Class<?> callbackClass = callback.value();
+            JavaInterface javaInterface;
+            try {
+                javaInterface = javaInterfaceFactory.createJavaInterface(callbackClass);
+                contract.getInterfaceContract().setCallbackInterface(javaInterface);
+            } catch (InvalidInterfaceException e) {
+                throw new InvalidServiceTypeException("Invalid callback interface "+callbackClass, interfaze);
+            }
+        } else if (callback != null && Void.class.equals(callback.value())) {
+            throw new InvalidServiceTypeException("No callback interface specified on annotation", interfaze);
+        }
+    }
+
+    public boolean injectionAnnotationsPresent(Annotation[][] annots) {
+        for (Annotation[] annotations : annots) {
+            for (Annotation annotation : annotations) {
+                Class<? extends Annotation> annotType = annotation.annotationType();
+                if (annotType.equals(Property.class) || annotType.equals(Reference.class)
+                    || annotType.equals(Resource.class)) {
+                    return true;
+                }
+            }
+        }
+        return false;
+    }
+}
diff --git a/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/introspect/SpringXMLComponentTypeLoader.java b/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/introspect/SpringXMLComponentTypeLoader.java
new file mode 100644
index 0000000000..bd3134c5f2
--- /dev/null
+++ b/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/introspect/SpringXMLComponentTypeLoader.java
@@ -0,0 +1,1153 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * 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.spring.introspect;
+
+import static javax.xml.stream.XMLStreamConstants.END_ELEMENT;
+import static javax.xml.stream.XMLStreamConstants.START_ELEMENT;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.net.MalformedURLException;
+import java.net.URI;
+import java.net.URL;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Enumeration;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.jar.Attributes;
+import java.util.jar.JarEntry;
+import java.util.jar.JarFile;
+import java.util.jar.Manifest;
+
+import javax.xml.namespace.QName;
+import javax.xml.stream.XMLInputFactory;
+import javax.xml.stream.XMLStreamException;
+import javax.xml.stream.XMLStreamReader;
+
+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.assembly.xml.PolicySubjectProcessor;
+import org.apache.tuscany.sca.contribution.Artifact;
+import org.apache.tuscany.sca.contribution.ContributionFactory;
+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.resolver.ClassReference;
+import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
+import org.apache.tuscany.sca.core.ExtensionPointRegistry;
+import org.apache.tuscany.sca.core.FactoryExtensionPoint;
+import org.apache.tuscany.sca.implementation.java.JavaConstructorImpl;
+import org.apache.tuscany.sca.implementation.java.JavaElementImpl;
+import org.apache.tuscany.sca.implementation.java.JavaImplementation;
+import org.apache.tuscany.sca.implementation.java.JavaParameterImpl;
+import org.apache.tuscany.sca.implementation.spring.SpringBeanElement;
+import org.apache.tuscany.sca.implementation.spring.SpringConstructorArgElement;
+import org.apache.tuscany.sca.implementation.spring.SpringImplementation;
+import org.apache.tuscany.sca.implementation.spring.SpringImplementationConstants;
+import org.apache.tuscany.sca.implementation.spring.SpringPropertyElement;
+import org.apache.tuscany.sca.implementation.spring.SpringSCAPropertyElement;
+import org.apache.tuscany.sca.implementation.spring.SpringSCAReferenceElement;
+import org.apache.tuscany.sca.implementation.spring.SpringSCAServiceElement;
+import org.apache.tuscany.sca.interfacedef.InvalidInterfaceException;
+import org.apache.tuscany.sca.interfacedef.java.JavaInterface;
+import org.apache.tuscany.sca.interfacedef.java.JavaInterfaceContract;
+import org.apache.tuscany.sca.interfacedef.java.JavaInterfaceFactory;
+import org.apache.tuscany.sca.interfacedef.util.JavaXMLMapper;
+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.PolicyFactory;
+
+/**
+ * Introspects a Spring XML application-context configuration file to create <implementation-spring../>
+ * component type information.
+ *
+ * @version $Rev$ $Date$
+ */
+public class SpringXMLComponentTypeLoader {
+    private ExtensionPointRegistry registry;
+    private XMLInputFactory xmlInputFactory;
+    private ContributionFactory contributionFactory;
+    private AssemblyFactory assemblyFactory;
+    private JavaInterfaceFactory javaFactory;
+    private PolicyFactory policyFactory;
+    private PolicySubjectProcessor policyProcessor;
+    private Monitor monitor;
+    private SpringBeanIntrospector beanIntrospector;
+
+    public SpringXMLComponentTypeLoader(ExtensionPointRegistry registry,
+                                        Monitor monitor) {
+        super();
+        this.registry = registry;
+        FactoryExtensionPoint factories = registry.getExtensionPoint(FactoryExtensionPoint.class);
+        this.assemblyFactory = factories.getFactory(AssemblyFactory.class);
+        this.javaFactory = factories.getFactory(JavaInterfaceFactory.class);
+        this.policyFactory = factories.getFactory(PolicyFactory.class);
+        this.policyProcessor = new PolicySubjectProcessor(policyFactory);
+        this.contributionFactory = factories.getFactory(ContributionFactory.class);
+        this.xmlInputFactory = factories.getFactory(XMLInputFactory.class);
+        this.monitor = monitor;
+    }
+    
+    /**
+     * Report a exception.
+     *
+     * @param problems
+     * @param message
+     * @param model
+     */
+    private void error(String message, Object model, Exception ex) {
+    	 if (monitor != null) {
+	        Problem problem = monitor.createProblem(this.getClass().getName(), "impl-spring-validation-messages", Severity.ERROR, model, message, ex);
+	        monitor.problem(problem);
+    	 }
+    }
+
+    /**
+     * Report a error.
+     *
+     * @param problems
+     * @param message
+     * @param model
+     */
+    private void error(String message, Object model, Object... messageParameters) {
+    	 if (monitor != null) {
+	        Problem problem = monitor.createProblem(this.getClass().getName(), "impl-spring-validation-messages", Severity.ERROR, model, message, (Object[])messageParameters);
+	        monitor.problem(problem);
+    	 }
+    }
+
+    protected Class<SpringImplementation> getImplementationClass() {
+        return SpringImplementation.class;
+    }
+
+    /**
+     * Base method which loads the component type from the application-context attached to the
+     * Spring implementation
+     *
+     */
+    public void load(SpringImplementation implementation, ModelResolver resolver, ProcessorContext context) throws ContributionReadException {
+        //System.out.println("Spring TypeLoader - load method start");
+    	ComponentType componentType = implementation.getComponentType();
+        /* Check that there is a component type object already set	*/
+        if (componentType == null) {
+            throw new ContributionReadException("SpringXMLLoader load: implementation has no ComponentType object");
+        }
+        if (componentType.isUnresolved()) {
+            /* Fetch the location of the application-context file from the implementation */
+            loadFromXML(implementation, resolver, context);
+            if (!componentType.isUnresolved())
+                implementation.setUnresolved(false);
+        } // end if
+        //System.out.println("Spring TypeLoader - load method complete");
+    } // end method load
+
+    private Class<?> resolveClass(ModelResolver resolver, String className, ProcessorContext context) throws ClassNotFoundException {
+        ClassReference classReference = new ClassReference(className);
+        classReference = resolver.resolveModel(ClassReference.class, classReference, context);
+        if (classReference.isUnresolved()) {
+            throw new ClassNotFoundException(className);
+        }
+        Class<?> javaClass = classReference.getJavaClass();
+        return javaClass;
+    }
+
+    /**
+     * Method which fills out the component type for a Spring implementation by reading the
+     * Spring application-context.xml file.
+     *
+     * @param implementation SpringImplementation into which to load the component type information
+     * @throws ContributionReadException Failed to read the contribution
+     */
+    private void loadFromXML(SpringImplementation implementation, ModelResolver resolver, ProcessorContext context) throws ContributionReadException {
+        XMLStreamReader reader;
+        List<SpringBeanElement> beans = new ArrayList<SpringBeanElement>();
+        List<SpringSCAServiceElement> services = new ArrayList<SpringSCAServiceElement>();
+        List<SpringSCAReferenceElement> references = new ArrayList<SpringSCAReferenceElement>();
+        List<SpringSCAPropertyElement> scaproperties = new ArrayList<SpringSCAPropertyElement>();
+
+        URL resource;
+        List<URL> contextResources = new ArrayList<URL>();
+        String contextPath = implementation.getLocation();
+
+        try {        	
+            resource = resolveLocation(resolver, contextPath, context);
+            contextResources = getApplicationContextResource(resource);
+            
+            implementation.setClassLoader(new ContextClassLoader(resolver, context));
+            implementation.setResource(contextResources);
+            // The URI is used to uniquely identify the Implementation
+            implementation.setURI(resource.toString());
+            
+            for (URL contextResource : contextResources) {            	
+            	List<SpringBeanElement> appCxtBeans = new ArrayList<SpringBeanElement>();
+                List<SpringSCAServiceElement> appCxtServices = new ArrayList<SpringSCAServiceElement>();
+                List<SpringSCAReferenceElement> appCxtReferences = new ArrayList<SpringSCAReferenceElement>();
+                List<SpringSCAPropertyElement> appCxtProperties = new ArrayList<SpringSCAPropertyElement>();
+            	reader = xmlInputFactory.createXMLStreamReader(contextResource.openStream());
+            	// Read the beans, services, references and properties for individual application context
+            	readContextDefinition(resolver, reader, contextPath, appCxtBeans, appCxtServices, appCxtReferences, appCxtProperties, context);
+            	// Validate the beans from individual application context for uniqueness
+            	validateBeans(appCxtBeans, appCxtServices, appCxtReferences, appCxtProperties);
+            	// Add all the validated beans to the generic list
+            	beans.addAll(appCxtBeans);
+            	services.addAll(appCxtServices);
+            	references.addAll(appCxtReferences);
+            	scaproperties.addAll(appCxtProperties);
+            	reader.close();
+            }
+        } catch (IOException e) {
+            throw new ContributionReadException(e);
+        } catch (XMLStreamException e) {
+            throw new ContributionReadException(e);
+        }
+
+        /* At this point, the complete application-context.xml file has been read and its contents  */
+        /* stored in the lists of beans, services, references.  These are now used to generate      */
+        /* the implied componentType for the application context								    */
+        generateComponentType(implementation, resolver, beans, services, references, scaproperties, context);
+
+        return;
+    } // end method loadFromXML
+
+    private URL resolveLocation(ModelResolver resolver, String contextPath, ProcessorContext context) throws MalformedURLException,
+        ContributionReadException {
+        URL resource = null;
+        URI uri = URI.create(contextPath);
+        if (!uri.isAbsolute()) {
+            Artifact artifact = contributionFactory.createArtifact();
+            artifact.setUnresolved(true);
+            artifact.setURI(contextPath);
+            artifact = resolver.resolveModel(Artifact.class, artifact, context);
+            if (!artifact.isUnresolved()) {
+                resource = new URL(artifact.getLocation());
+            } else {
+                throw new ContributionReadException("Location cannot be resloved: " + contextPath);
+            }
+        } else {
+            resource = new URL(contextPath);
+        }
+        return resource;
+    }
+
+    /**
+     * Method which returns the XMLStreamReader for the Spring application-context.xml file
+     * specified in the location attribute
+     */
+    private XMLStreamReader getApplicationContextReader(ModelResolver resolver, String location, ProcessorContext context) throws ContributionReadException {
+
+        try {
+            URL resource = getApplicationContextResource(resolveLocation(resolver, location, context)).get(0);
+            XMLStreamReader reader =
+            	xmlInputFactory.createXMLStreamReader(resource.openStream());
+            return reader;
+        } catch (IOException e) {
+            throw new ContributionReadException(e);
+        } catch (XMLStreamException e) {
+            throw new ContributionReadException(e);
+        }
+    }
+
+    /**
+     * Method which reads the spring context definitions from Spring application-context.xml
+     * file and identifies the defined beans, properties, services and references
+     * @param context 
+     */
+    private void readContextDefinition(ModelResolver resolver,
+                                       XMLStreamReader reader,
+                                       String contextPath,
+                                       List<SpringBeanElement> beans,
+                                       List<SpringSCAServiceElement> services,
+                                       List<SpringSCAReferenceElement> references,
+                                       List<SpringSCAPropertyElement> scaproperties, ProcessorContext context) throws ContributionReadException {
+
+        SpringBeanElement bean = null;
+
+        try {
+            boolean completed = false;
+            while (!completed) {
+                switch (reader.next()) {
+                    case START_ELEMENT:
+                        QName qname = reader.getName();
+                        //System.out.println("Spring TypeLoader - found element with name: " + qname.toString());
+                        if (SpringImplementationConstants.IMPORT_ELEMENT.equals(qname)) {
+                        	//FIXME - put the sequence of code below which gets the ireader into a subsidiary method
+                            String location = reader.getAttributeValue(null, "resource");
+                            if (location != null) {
+                            	// FIXME - need to find a right way of generating this path
+                                String resourcePath = contextPath.substring(0, contextPath.lastIndexOf("/")+1) + location;
+                                XMLStreamReader ireader = getApplicationContextReader(resolver, resourcePath, context);
+                                // Read the context definition for the identified imported resource
+                                readContextDefinition(resolver, ireader, contextPath, beans, services, references, scaproperties, context);
+                            }
+                        } else if (SpringImplementationConstants.SCA_SERVICE_ELEMENT.equals(qname)) {
+                        	// The value of the @name attribute of an <sca:service/> subelement of a <beans/> 
+                        	// element MUST be unique amongst the <sca:service/> subelements of the <beans/> element.
+                        	if (!services.isEmpty() && (services.contains(reader.getAttributeValue(null, "name"))))
+                            		error("ScaServiceNameNotUnique", resolver);
+                        	
+                        	SpringSCAServiceElement service =
+                                new SpringSCAServiceElement(reader.getAttributeValue(null, "name"), 
+                                							reader.getAttributeValue(null, "target"));
+                            if (reader.getAttributeValue(null, "type") != null)
+                            	service.setType(reader.getAttributeValue(null, "type"));
+                            policyProcessor.readPolicies(service, reader);
+                            services.add(service);
+                        } else if (SpringImplementationConstants.SCA_REFERENCE_ELEMENT.equals(qname)) {
+                        	// The value of the @name attribute of an <sca:reference/> subelement of a <beans/> 
+                        	// element MUST be unique amongst the @name attributes of the <sca:reference/> subelements, 
+                        	// of the <beans/> element.
+                        	if (!references.isEmpty() && (references.contains(reader.getAttributeValue(null, "name"))))
+                            		error("ScaReferenceNameNotUnique", resolver);
+                        	
+                        	SpringSCAReferenceElement reference =
+                                new SpringSCAReferenceElement(reader.getAttributeValue(null, "name"), 
+                                							  reader.getAttributeValue(null, "type"));
+                            if (reader.getAttributeValue(null, "default") != null)
+                            	reference.setDefaultBean(reader.getAttributeValue(null, "default"));
+                            policyProcessor.readPolicies(reference, reader);
+                            references.add(reference);                            
+                        } else if (SpringImplementationConstants.SCA_PROPERTY_ELEMENT.equals(qname)) {
+                        	// The value of the @name attribute of an <sca:property/> subelement of a <beans/> 
+                        	// element MUST be unique amongst the @name attributes of the <sca:property/> subelements, 
+                        	// of the <beans/> element.
+                        	if (!scaproperties.isEmpty() && (scaproperties.contains(reader.getAttributeValue(null, "name"))))
+                            		error("ScaPropertyNameNotUnique", resolver);
+                        	
+                        	SpringSCAPropertyElement scaproperty =
+                                new SpringSCAPropertyElement(reader.getAttributeValue(null, "name"), reader
+                                    .getAttributeValue(null, "type"));
+                            scaproperties.add(scaproperty);
+                        } else if (SpringImplementationConstants.BEAN_ELEMENT.equals(qname)) {
+                            bean = new SpringBeanElement(reader.getAttributeValue(null, "id"), 
+                            							 reader.getAttributeValue(null, "class"));
+                            if (reader.getAttributeValue(null, "abstract") != null)
+                            	if (reader.getAttributeValue(null, "abstract").equals("true"))
+                            		bean.setAbstractBean(true);
+                            if (reader.getAttributeValue(null, "parent") != null)
+                            	if (!reader.getAttributeValue(null, "parent").equals(""))
+                            		bean.setParentAttribute(true);                           	
+                            if (reader.getAttributeValue(null, "factory-bean") != null)
+                            	if (!reader.getAttributeValue(null, "factory-bean").equals(""))
+                            		bean.setFactoryBeanAttribute(true);                            	
+                            if (reader.getAttributeValue(null, "factory-method") != null)
+                            	if (!reader.getAttributeValue(null, "factory-method").equals(""))
+                            		bean.setFactoryMethodAttribute(true);                           	
+                            // Set the first name as bean name, when the @id attribute is absent.
+                            if (reader.getAttributeValue(null, "id") == null) {
+                            	if (reader.getAttributeValue(null, "name") != null) {
+                            		String[] names = (reader.getAttributeValue(null, "name")).split(",");
+                            		bean.setId(names[0]);
+                            	}
+                            }
+                            beans.add(bean);
+                            // Read the <bean> element and its child elements
+                            readBeanDefinition(reader, bean, beans);
+                        } // end if
+                        break;
+                    case END_ELEMENT:
+                        if (SpringImplementationConstants.BEANS_ELEMENT.equals(reader.getName())) {
+                            //System.out.println("Spring TypeLoader - finished read of context file");
+                            completed = true;
+                            break;
+                        } // end if
+                } // end switch
+            } // end while
+        } catch (XMLStreamException e) {
+            throw new ContributionReadException(e);
+        }
+    }
+
+
+    /**
+     * Method which reads the bean definitions from Spring application-context.xml file and identifies
+     * the defined beans, properties, services and references
+     */
+    private void readBeanDefinition(XMLStreamReader reader,
+                                    SpringBeanElement bean,
+                                    List<SpringBeanElement> beans) throws ContributionReadException {
+
+    	SpringBeanElement innerbean = null;
+        SpringPropertyElement property = null;
+        SpringConstructorArgElement constructorArg = null;
+        
+        try {
+            boolean completed = false;            
+            while (!completed) {
+                switch (reader.next()) {
+                    case START_ELEMENT:
+                        QName qname = reader.getName();
+                        if (SpringImplementationConstants.BEAN_ELEMENT.equals(qname)) {
+                        	innerbean = new SpringBeanElement(reader.getAttributeValue(null, "id"), reader
+                                    .getAttributeValue(null, "class"));
+                        	// Set the first name as bean name, when the @id attribute is absent.
+                            if (reader.getAttributeValue(null, "id") == null) {
+                            	if (reader.getAttributeValue(null, "name") != null) {
+                            		String[] names = (reader.getAttributeValue(null, "name")).split(",");
+                            		innerbean.setId(names[0]);
+                            	}
+                            }
+                            innerbean.setInnerBean(true);
+                            beans.add(innerbean);
+                            readBeanDefinition(reader, innerbean, beans);
+                        } else if (SpringImplementationConstants.PROPERTY_ELEMENT.equals(qname)) {
+                            property = new SpringPropertyElement(reader.getAttributeValue(null, "name"));
+                            if (reader.getAttributeValue(null, "ref") != null)
+                            	property.addRef(reader.getAttributeValue(null, "ref"));
+                            bean.addProperty(property);
+                        } else if (SpringImplementationConstants.CONSTRUCTORARG_ELEMENT.equals(qname)) {
+                            constructorArg = new SpringConstructorArgElement(reader.getAttributeValue(null, "type"));
+                            if (reader.getAttributeValue(null, "ref") != null)
+                            	constructorArg.addRef(reader.getAttributeValue(null, "ref"));
+                            if (reader.getAttributeValue(null, "index") != null)
+                            	constructorArg.setIndex((new Integer(reader.getAttributeValue(null, "index"))).intValue());
+                            if (reader.getAttributeValue(null, "value") != null)
+                            	constructorArg.addValue(reader.getAttributeValue(null, "value"));
+                            bean.addCustructorArgs(constructorArg);
+                        } else if (SpringImplementationConstants.REF_ELEMENT.equals(qname)) {
+                        	String ref = reader.getAttributeValue(null, "bean");                            
+                            // Check if the parent element is a property
+                            if (property != null) property.addRef(ref);
+                            // Check if the parent element is a constructor-arg
+                            if (constructorArg != null) constructorArg.addRef(ref);
+                        } else if (SpringImplementationConstants.VALUE_ELEMENT.equals(qname)) {
+                            String value = reader.getElementText();
+                            // Check if the parent element is a constructor-arg
+                            if (constructorArg != null) constructorArg.addValue(value);
+                        } else if (SpringImplementationConstants.LIST_ELEMENT.equals(qname) ||
+                        		   SpringImplementationConstants.SET_ELEMENT.equals(qname)  ||
+                        		   SpringImplementationConstants.MAP_ELEMENT.equals(qname)) {                        	
+                        	if (property != null) 
+                        		readCollections(reader, bean, beans, property, null);
+                            if (constructorArg != null)
+                            	readCollections(reader, bean, beans, null, constructorArg);
+                        } // end if
+                        break;
+                    case END_ELEMENT:
+                        if (SpringImplementationConstants.BEAN_ELEMENT.equals(reader.getName())) {
+                            completed = true;
+                            break;
+                        } else if (SpringImplementationConstants.PROPERTY_ELEMENT.equals(reader.getName())) {
+                            property = null;
+                        } else if (SpringImplementationConstants.CONSTRUCTORARG_ELEMENT.equals(reader.getName())) {
+                            constructorArg = null;
+                        } // end if
+                } // end switch
+            } // end while
+        } catch (XMLStreamException e) {
+            throw new ContributionReadException(e);
+        }
+    }
+    
+    
+    /**
+     * Method which reads the collection elements from Spring application-context.xml file and identifies
+     * the defined beans, list, maps and sets
+     */
+    private void readCollections(XMLStreamReader reader,
+                                 SpringBeanElement bean,
+                                 List<SpringBeanElement> beans,
+                                 SpringPropertyElement property,
+                                 SpringConstructorArgElement constructorArg) throws ContributionReadException {
+    	
+    	SpringBeanElement innerbean = null;
+        
+        try {
+            boolean completed = false;            
+            while (!completed) {
+                switch (reader.next()) {
+                    case START_ELEMENT:
+                        QName qname = reader.getName();
+                        if (SpringImplementationConstants.BEAN_ELEMENT.equals(qname)) {
+                        	innerbean = new SpringBeanElement(reader.getAttributeValue(null, "id"), reader
+                                    .getAttributeValue(null, "class"));
+                        	// Set the first name as bean name, when the @id attribute is absent.
+                            if (reader.getAttributeValue(null, "id") == null)
+                            	if (reader.getAttributeValue(null, "name") != null) {
+                            		String[] names = (reader.getAttributeValue(null, "name")).split(",");
+                            		innerbean.setId(names[0]);
+                            	}
+                            innerbean.setInnerBean(true);
+                            beans.add(innerbean);
+                            readBeanDefinition(reader, innerbean, beans);
+                        } else if (SpringImplementationConstants.REF_ELEMENT.equals(qname)) {
+                        	String ref = reader.getAttributeValue(null, "bean");
+                            if (property != null) property.addRef(ref);
+                            if (constructorArg != null) constructorArg.addRef(ref);                            
+                        } else if (SpringImplementationConstants.LIST_ELEMENT.equals(qname) ||
+                        		   SpringImplementationConstants.SET_ELEMENT.equals(qname) ||
+                        		   SpringImplementationConstants.MAP_ELEMENT.equals(qname)) {
+                        	if (property != null) 
+                        		readCollections(reader, innerbean, beans, property, null);
+                        	if (constructorArg != null)
+                            	readCollections(reader, innerbean, beans, null, constructorArg);                        	
+                        } else if (SpringImplementationConstants.ENTRY_ELEMENT.equals(qname)) {
+                            String keyRef = reader.getAttributeValue(null, "key-ref");
+                            String valueRef = reader.getAttributeValue(null, "value-ref");
+                            if (property != null) {property.addRef(keyRef); property.addRef(valueRef);}
+                            if (constructorArg != null) {constructorArg.addRef(keyRef); constructorArg.addRef(valueRef);}
+                        } // end if
+                        break;
+                    case END_ELEMENT:
+                        if (SpringImplementationConstants.LIST_ELEMENT.equals(reader.getName())) {
+                        	completed = true;
+                            break;
+                        } else if (SpringImplementationConstants.SET_ELEMENT.equals(reader.getName())) {
+                        	completed = true;
+                            break;
+                        } else if (SpringImplementationConstants.MAP_ELEMENT.equals(reader.getName())) {
+                        	completed = true;
+                            break;
+                        } // end if
+                } // end switch
+            } // end while
+        } catch (XMLStreamException e) {
+            throw new ContributionReadException(e);
+        }
+    }
+
+    /**
+     * Generates the Spring implementation component type from the configuration contained in the
+     * lists of beans, services, references and scaproperties derived from the application context
+     */
+    private void generateComponentType(SpringImplementation implementation,
+                                       ModelResolver resolver,
+                                       List<SpringBeanElement> beans,
+                                       List<SpringSCAServiceElement> services,
+                                       List<SpringSCAReferenceElement> references,
+                                       List<SpringSCAPropertyElement> scaproperties,
+                                       ProcessorContext context) throws ContributionReadException {
+        /*
+         * 1. Each sca:service becomes a service in the component type
+         * 2. Each sca:reference becomes a reference in the component type
+         * 3. Each sca:property becomes a property in the component type
+         * 4. IF there are no explicit service elements, each bean becomes a service
+         * 5. Each bean property which is a reference not pointing at another bean in the
+         *    application context becomes a reference unless it is pointing at one of the references
+         * 6. Each bean property which is not a reference and which is not pointing
+         *    at another bean in the application context becomes a property in the component type
+         */
+
+    	JavaImplementation javaImplementation = null;
+        ComponentType componentType = implementation.getComponentType();
+
+        try {
+            // Deal with the services first....
+            Iterator<SpringSCAServiceElement> its = services.iterator();
+            while (its.hasNext()) {
+                SpringSCAServiceElement serviceElement = its.next();                
+                Class<?> interfaze = resolveClass(resolver, serviceElement.getType(), context);
+                Service theService = createService(interfaze, serviceElement.getName());
+                // Spring allows duplication of bean definitions in multiple context scenario,
+                // in such cases, the latest bean definition overrides the older ones, hence 
+                // we will remove any older definition and use the latest.
+                Service duplicate = null;
+                for (Service service : componentType.getServices()) {
+                	if (service.getName().equals(theService.getName()))
+                		duplicate = service;
+                }
+                if (duplicate != null)
+                	componentType.getServices().remove(duplicate);
+                
+                componentType.getServices().add(theService);
+                // Add this service to the Service / Bean map
+                String beanName = serviceElement.getTarget();
+                for (SpringBeanElement beanElement : beans) {
+                    if (beanName.equals(beanElement.getId())) {
+                    	if (isvalidBeanForService(beanElement)) {
+                    		// add the required intents and policySets for the service
+                            theService.getRequiredIntents().addAll(serviceElement.getRequiredIntents());
+                            theService.getPolicySets().addAll(serviceElement.getPolicySets());
+                            implementation.setBeanForService(theService, beanElement);
+                    	}
+                    }
+                } // end for
+            } // end while
+
+            // Next handle the references
+            Iterator<SpringSCAReferenceElement> itr = references.iterator();
+            while (itr.hasNext()) {
+                SpringSCAReferenceElement referenceElement = itr.next();
+                Class<?> interfaze = resolveClass(resolver, referenceElement.getType(), context);
+                Reference theReference = createReference(interfaze, referenceElement.getName());
+                // Override the older bean definition with the latest ones
+                // for the duplicate definitions found.
+                Reference duplicate = null;
+                for (Reference reference : componentType.getReferences()) {
+                	if (reference.getName().equals(theReference.getName()))
+                		duplicate = reference;
+                }
+                if (duplicate != null)
+                	componentType.getReferences().remove(duplicate);
+                
+                // add the required intents and policySets for this reference
+                theReference.getRequiredIntents().addAll(referenceElement.getRequiredIntents());
+                theReference.getPolicySets().addAll(referenceElement.getPolicySets());
+                componentType.getReferences().add(theReference);
+            } // end while
+
+            // Next handle the properties
+            Iterator<SpringSCAPropertyElement> itsp = scaproperties.iterator();
+            while (itsp.hasNext()) {
+                SpringSCAPropertyElement scaproperty = itsp.next();
+                // Create a component type property if the SCA property element has a name
+                // and a type declared...
+                if (scaproperty.getType() != null && scaproperty.getName() != null) {
+                    Property theProperty = assemblyFactory.createProperty();
+                    theProperty.setName(scaproperty.getName());
+                    // Get the Java class and then an XSD element type for the property
+                    Class<?> propType = Class.forName(scaproperty.getType());
+                    theProperty.setXSDType(JavaXMLMapper.getXMLType(propType));
+                    // Override the older bean definition with the latest ones
+                    // for the duplicate definitions found.
+                    Property duplicate = null;
+                    for (Property property : componentType.getProperties()) {
+                    	if (property.getName().equals(theProperty.getName()))
+                    		duplicate = property;
+                    }
+                    if (duplicate != null)
+                    	componentType.getProperties().remove(duplicate);
+                    
+                    componentType.getProperties().add(theProperty);
+                    // Remember the Java Class (ie the type) for this property
+                    implementation.setPropertyClass(theProperty.getName(), propType);
+                } // end if
+            } // end while
+
+            // Finally deal with the beans
+            Iterator<SpringBeanElement> itb;
+            // If there are no explicit service elements, then expose all the beans
+            if (services.isEmpty()) {
+                itb = beans.iterator();
+                // Loop through all the beans found
+                while (itb.hasNext()) {
+                    SpringBeanElement beanElement = itb.next();
+                    // If its not a valid bean for service, ignore it
+                    if (!isvalidBeanForService(beanElement)) continue;
+                    // Load the Spring bean class
+                    Class<?> beanClass = resolveClass(resolver, beanElement.getClassName(), context);
+                    // Introspect the bean
+                    beanIntrospector =
+                        new SpringBeanIntrospector(registry, beanElement.getCustructorArgs());
+                    ComponentType beanComponentType = assemblyFactory.createComponentType();
+                    javaImplementation = beanIntrospector.introspectBean(beanClass, beanComponentType);
+                    // Set the service name as bean name
+                    for (Service componentService : beanComponentType.getServices())                    	
+                    	componentService.setName(beanElement.getId());
+                    // Get the service interface defined by this Spring Bean and add to
+                    // the component type of the Spring Assembly
+                    List<Service> beanServices = beanComponentType.getServices();
+                    componentType.getServices().addAll(beanServices);
+                    // Add these services to the Service / Bean map
+                    for (Service beanService : beanServices) {
+                        implementation.setBeanForService(beanService, beanElement);
+                    }
+                } // end while
+            } // end if
+
+            itb = beans.iterator();
+            while (itb.hasNext()) {
+                SpringBeanElement beanElement = itb.next();
+                // Ignore if the bean has no properties and constructor arguments
+                if (beanElement.getProperties().isEmpty() && beanElement.getCustructorArgs().isEmpty())
+                	continue;
+
+                Class<?> beanClass = resolveClass(resolver, beanElement.getClassName(), context);
+                // Introspect the bean
+                beanIntrospector =
+                    new SpringBeanIntrospector(registry, beanElement.getCustructorArgs());
+                ComponentType beanComponentType = assemblyFactory.createComponentType();
+                javaImplementation = beanIntrospector.introspectBean(beanClass, beanComponentType);
+                Map<String, JavaElementImpl> propertyMap = javaImplementation.getPropertyMembers();
+                JavaConstructorImpl constructor = javaImplementation.getConstructor();
+                // Get the references by this Spring Bean and add the unresolved ones to
+                // the component type of the Spring Assembly
+                List<Reference> beanReferences = beanComponentType.getReferences();
+                List<Property> beanProperties = beanComponentType.getProperties();
+
+                Iterator<SpringPropertyElement> itp = beanElement.getProperties().iterator();
+                while (itp.hasNext()) {
+                    SpringPropertyElement propertyElement = itp.next();
+                    for (String propertyRef : propertyElement.getRefs()) {
+	                    if (propertyRefUnresolved(propertyRef, beans, references, scaproperties)) {
+	                        // This means an unresolved reference from the spring bean...
+	                    	for (Reference reference : beanReferences) {
+	                            if (propertyElement.getName().equals(reference.getName())) {
+	                            	// The name of the reference in this case is the string in
+	                                // the @ref attribute of the Spring property element, NOT the
+	                                // name of the field in the Spring bean....
+	                                reference.setName(propertyRef);
+	                                componentType.getReferences().add(reference);
+	                            } // end if
+	                        } // end for
+	
+	                    	// Store the unresolved references as unresolvedBeanRef in the Spring Implementation type
+	                    	for (Property scaproperty : beanProperties) {
+	                            if (propertyElement.getName().equals(scaproperty.getName())) {
+	                            	// The name of the reference in this case is the string in
+	                                // the @ref attribute of the Spring property element, NOT the
+	                                // name of the field in the Spring bean....
+	                            	Class<?> interfaze = resolveClass(resolver, (propertyMap.get(propertyElement.getName()).getType()).getName(), context);
+	                                Reference theReference = createReference(interfaze, propertyRef);
+	                                implementation.setUnresolvedBeanRef(propertyRef, theReference);
+	                            } // end if
+	                    	} // end for
+	                    } // end if 
+                    } // end for
+                } // end while
+
+                Iterator<SpringConstructorArgElement> itcr = beanElement.getCustructorArgs().iterator();
+                while (itcr.hasNext()) {
+                	SpringConstructorArgElement conArgElement = itcr.next();
+                	for (String constructorArgRef : conArgElement.getRefs()) {
+	                	if (propertyRefUnresolved(constructorArgRef, beans, references, scaproperties)) {
+	                    	for (JavaParameterImpl parameter : constructor.getParameters()) {
+	                    		String paramType = parameter.getType().getName();
+	                    		Class<?> interfaze = resolveClass(resolver, paramType, context);
+	                    		// Create a component type reference/property if the constructor-arg element has a
+	                            // type attribute OR index attribute declared...
+	                    		if ((conArgElement.getType() != null && paramType.equals(conArgElement.getType())) ||
+	                    		    (conArgElement.getIndex() != -1 && (conArgElement.getIndex() == parameter.getIndex())))
+	                    		{
+	                    			if (parameter.getClassifer().getName().equals("org.osoa.sca.annotations.Reference")) {
+	                    				Reference theReference = createReference(interfaze, constructorArgRef);
+	                    				componentType.getReferences().add(theReference);
+	                    			}
+	                    			if (parameter.getClassifer().getName().equals("org.osoa.sca.annotations.Property")) {
+	                    				// Store the unresolved references as unresolvedBeanRef in the Spring Implementation type
+	                                	// we might need to verify with the component definition later.
+	                    				Reference theReference = createReference(interfaze, constructorArgRef);
+	                        			implementation.setUnresolvedBeanRef(constructorArgRef, theReference);
+	                    			}
+	                    		}
+	                    	} // end for
+	                    } // end if
+                	} // end for
+                } // end while
+
+            } // end while
+
+        } catch (ClassNotFoundException e) {
+            // Means that either an interface class, property class or a bean was not found
+            throw new ContributionReadException(e);
+        } catch (InvalidInterfaceException e) {
+            throw new ContributionReadException(e);
+        } catch (ContributionResolveException e) {
+
+        } // end try
+
+        // If we get here, the Spring assembly component type is resolved
+        componentType.setUnresolved(false);
+        implementation.setComponentType(componentType);
+        return;
+    } // end method generateComponentType
+
+    /*
+     * Determines whether a reference attribute of a Spring property element is resolved either
+     * by a bean in the application context or by an SCA reference element or by an SCA property
+     * element
+     * @param ref - a String containing the name of the reference - may be null
+     * @param beans - a List of SpringBean elements
+     * @param references - a List of SCA reference elements
+     * @return true if the property is not resolved, false if it is resolved
+     */
+    private boolean propertyRefUnresolved(String ref,
+                                          List<SpringBeanElement> beans,
+                                          List<SpringSCAReferenceElement> references,
+                                          List<SpringSCAPropertyElement> scaproperties) {
+        boolean unresolved = true;
+
+        if (ref != null) {
+            // Scan over the beans looking for a match
+            Iterator<SpringBeanElement> itb = beans.iterator();
+            while (itb.hasNext()) {
+                SpringBeanElement beanElement = itb.next();
+                // Does the bean name match the ref?
+                if (ref.equals(beanElement.getId())) {
+                    unresolved = false;
+                    break;
+                } // end if
+            } // end while
+            // Scan over the SCA reference elements looking for a match
+            if (unresolved) {
+                Iterator<SpringSCAReferenceElement> itr = references.iterator();
+                while (itr.hasNext()) {
+                    SpringSCAReferenceElement referenceElement = itr.next();
+                    if (ref.equals(referenceElement.getName())) {
+                        unresolved = false;
+                        break;
+                    } // end if
+                } // end while
+            } // end if
+            // Scan over the SCA property elements looking for a match
+            if (unresolved) {
+                Iterator<SpringSCAPropertyElement> itsp = scaproperties.iterator();
+                while (itsp.hasNext()) {
+                    SpringSCAPropertyElement propertyElement = itsp.next();
+                    if (ref.equals(propertyElement.getName())) {
+                        unresolved = false;
+                        break;
+                    } // end if
+                } // end while
+            } // end if
+        } else {
+            // In the case where ref = null, the property is not going to be a reference of any
+            // kind and can be ignored
+            unresolved = false;
+        } // end if
+
+        return unresolved;
+
+    } // end method propertyRefUnresolved
+    
+    /**
+     * Validates whether the <sca:service>, <sca:reference> and <sca:property> elements
+     * has unique names within the application context.
+     */
+    private void validateBeans(List<SpringBeanElement> beans,
+            				   List<SpringSCAServiceElement> services,
+            				   List<SpringSCAReferenceElement> references,
+            				   List<SpringSCAPropertyElement> scaproperties) throws ContributionReadException {
+    	        
+    	// The @target attribute of a <service/> subelement of a <beans/> element 
+    	// MUST have the value of the @name attribute of one of the <bean/> 
+    	// subelements of the <beans/> element.    	
+    	Iterator<SpringSCAServiceElement> its = services.iterator();
+        while (its.hasNext()) {
+        	SpringSCAServiceElement serviceElement = its.next();
+        	boolean targetBeanExists = false;
+        	Iterator<SpringBeanElement> itb = beans.iterator();
+        	while (itb.hasNext()) {
+        		SpringBeanElement beanElement = itb.next();
+        		if (serviceElement.getTarget().equals(beanElement.getId()))
+        			targetBeanExists = true;
+        	}
+        	if (!targetBeanExists)
+        		error("TargetBeanDoesNotExist", beans);
+        } // end while
+        
+    	// The value of the @name attribute of an <sca:reference/> subelement of a <beans/> 
+    	// element MUST be unique amongst the @name attributes of the <sca:property/> 
+        // subelements and the <bean/> subelements of the <beans/> element.
+        // 									AND
+        // The @default attribute of a <sca:reference/> subelement of a <beans/>  
+        // element MUST have the value of the @name attribute of one of the <bean/> 
+        // subelements of the <beans/> element.
+        Iterator<SpringSCAReferenceElement> itr = references.iterator();
+        while (itr.hasNext()) {
+        	SpringSCAReferenceElement referenceElement = itr.next();
+        	boolean defaultBeanExists = true;
+        	boolean isUniqueReferenceName = true;
+        	Iterator<SpringBeanElement> itb = beans.iterator();
+        	while (itb.hasNext()) {
+        		SpringBeanElement beanElement = itb.next();
+        		if (referenceElement.getDefaultBean() != null)
+        			if (referenceElement.getDefaultBean().equals(beanElement.getId()))
+        				defaultBeanExists = false;
+        		if (referenceElement.getName().equals(beanElement.getId()))
+        			isUniqueReferenceName = false;
+        	}
+        	Iterator<SpringSCAPropertyElement> itp = scaproperties.iterator();
+        	while (itp.hasNext()) {
+        		SpringSCAPropertyElement propertyElement = itp.next();
+        		if (referenceElement.getName().equals(propertyElement.getName()))
+        			isUniqueReferenceName = false;
+        	}
+        	if (!defaultBeanExists)
+        		error("DefaultBeanDoesNotExist", beans);
+        	if (!isUniqueReferenceName)
+        		error("ScaReferenceNameNotUnique", beans);
+        } // end while
+            	
+    	// The value of the @name attribute of an <sca:property/> subelement of a <beans/> 
+    	// element MUST be unique amongst the @name attributes of the <sca:reference/> 
+        // subelements and the <bean/> subelements of the <beans/> element.    	
+        Iterator<SpringSCAPropertyElement> itp = scaproperties.iterator();
+        while (itp.hasNext()) {
+        	SpringSCAPropertyElement propertyElement = itp.next();
+        	boolean isUniquePropertyName = true;
+        	Iterator<SpringBeanElement> itb = beans.iterator();
+        	while (itb.hasNext()) {
+        		SpringBeanElement beanElement = itb.next();
+        		if (propertyElement.getName().equals(beanElement.getId()))
+        			isUniquePropertyName = false;	
+        	}
+        	Iterator<SpringSCAReferenceElement> itrp = references.iterator();
+            while (itrp.hasNext()) {
+            	SpringSCAReferenceElement referenceElement = itrp.next();
+            	if (propertyElement.getName().equals(referenceElement.getName()))
+        			isUniquePropertyName = false;
+            }
+        	if (!isUniquePropertyName)
+        		error("ScaPropertyNameNotUnique", beans);
+        } // end while
+    }
+    
+    /**
+     * Validates whether a bean definition is valid for exposing as service.
+     */
+    private boolean isvalidBeanForService(SpringBeanElement beanElement) {
+    	
+    	if (beanElement.isInnerBean())
+    		return false;
+    	if (beanElement.hasParentAttribute())
+    		return false;
+    	if (beanElement.hasFactoryMethodAttribute())
+    		return false;
+    	if (beanElement.hasFactoryBeanAttribute())
+    		return false;
+    	if (beanElement.getClassName() == null)
+    		return false;
+    	if (beanElement.getClassName().startsWith("org.springframework"))
+    		return false;
+        // return true otherwise	
+    	return true;
+    }
+    
+    
+    /**
+     * Gets hold of the application-context.xml file as a Spring resource
+     * @param locationAttr - the location attribute from the <implementation.spring../> element
+     * @param cl - the ClassLoader for the Spring implementation
+     */
+    protected List<URL> getApplicationContextResource(URL url)
+        throws ContributionReadException {
+        File manifestFile = null;
+        File appXmlFile;
+        File appXmlFolder;
+        File locationFile = null;
+        List<URL> appCtxResources = new ArrayList<URL>();
+        
+        if (url != null) {
+            String path = url.getPath();
+            locationFile = new File(path);
+        } else {
+            throw new ContributionReadException("SpringXMLComponentTypeLoader getApplicationContextResource: " 
+            		              + "unable to find resource file " + url);
+        }
+
+        if (locationFile.isDirectory()) {
+            try {
+                manifestFile = new File(locationFile, "META-INF"+ File.separator +"MANIFEST.MF");
+                if (manifestFile.exists()) {
+                    Manifest mf = new Manifest(new FileInputStream(manifestFile));
+                    Attributes mainAttrs = mf.getMainAttributes();
+                    String appCtxPath = mainAttrs.getValue("Spring-Context");
+                    if (appCtxPath != null) {
+                    	String[] cxtPaths = appCtxPath.split(";");
+	            		for (String path : cxtPaths) {
+	            			appXmlFile = new File(locationFile, path.trim());
+	            			if (appXmlFile.exists()) {
+	            				appCtxResources.add(appXmlFile.toURI().toURL());
+	            			}
+	            		}
+	            		return appCtxResources;
+                    }
+                }                
+                // No MANIFEST.MF file OR no manifest-specified Spring context , then read all the 
+                // xml files available in the META-INF/spring folder.
+                appXmlFolder = new File(locationFile, "META-INF" + File.separator + "spring");
+                if (appXmlFolder.exists()) {
+                	File[] files = appXmlFolder.listFiles();
+                	for (File appFile: files) {
+                		if (appFile.getName().endsWith(".xml")) {
+                			appCtxResources.add(appFile.toURI().toURL());
+                		}
+                	}
+                	return appCtxResources;
+                }
+            } catch (IOException e) {
+                throw new ContributionReadException("Error reading manifest " + manifestFile);
+            }
+        } else {
+        	if (locationFile.isFile() && locationFile.getName().endsWith(".jar")) {
+                try {
+                    JarFile jf = new JarFile(locationFile);                    
+                    JarEntry je;
+                    Manifest mf = jf.getManifest();
+                    if (mf != null) {
+                        Attributes mainAttrs = mf.getMainAttributes();
+                        String appCtxPath = mainAttrs.getValue("Spring-Context");
+                        if (appCtxPath != null) {
+                        	String[] cxtPaths = appCtxPath.split(";");
+    	            		for (String path : cxtPaths) {
+    	            			je = jf.getJarEntry(path.trim());
+    	            			if (je != null)
+    	            				appCtxResources.add(new URL("jar:" + locationFile.toURI().toURL() + "!/" + appCtxPath));
+    	            		}
+    	            		return appCtxResources;
+                        }
+                    }
+                    // No MANIFEST.MF file OR no manifest-specified Spring context , then read all the 
+                    // .xml files available in the META-INF/spring folder.
+                    Enumeration<JarEntry> entries = jf.entries();
+                    while (entries.hasMoreElements()) {
+                    	je = entries.nextElement();
+                    	if (je.getName().startsWith("META-INF/spring/") && je.getName().endsWith(".xml")) {
+                    		appCtxResources.add(new URL("jar:" + locationFile.toURI().toURL() + "!/" + je.getName()));
+                    	}
+                    }
+                    return appCtxResources;
+                } catch (IOException e) {
+                    // TODO: create a more appropriate exception type
+                    throw new ContributionReadException("SpringXMLComponentTypeLoader getApplicationContextResource: "
+                    												+ " IO exception reading context file.", e);
+                }
+        	}
+        	else {
+        		if (locationFile.getName().endsWith(".xml")) {
+        			appCtxResources.add(url);
+                	return appCtxResources;
+        		}
+        		else {
+        			// Deal with the directory inside a jar file, in case the contribution itself is a JAR file.
+        			try {
+	        			if (locationFile.getPath().indexOf(".jar") > 0) {
+	        				String jarPath = url.getPath().substring(5, url.getPath().indexOf("!"));
+	        				JarFile jf = new JarFile(jarPath);
+	        				JarEntry je = jf.getJarEntry(url.getPath().substring(url.getPath().indexOf("!/")+2)
+	        												+ "/" + "META-INF" + "/" + "MANIFEST.MF");
+	        			    if (je != null) {
+	        					Manifest mf = new Manifest(jf.getInputStream(je));
+	        					Attributes mainAttrs = mf.getMainAttributes();
+	                            String appCtxPath = mainAttrs.getValue("Spring-Context");
+	                            if (appCtxPath != null) {
+	                            	String[] cxtPaths = appCtxPath.split(";");
+	        	            		for (String path : cxtPaths) {
+		                                je = jf.getJarEntry(url.getPath().substring(url.getPath().indexOf("!/")+2) + "/" + path.trim());
+		                                if (je != null) {
+		                                	appCtxResources.add(new URL("jar:" + url.getPath() + "/" + path.trim()));		    	                        	
+		                                }
+	        	            		}
+	        	            		return appCtxResources;
+	                            }
+	        				}	        			    
+	        			    // No MANIFEST.MF file OR no manifest-specified Spring context , then read all the 
+	                        // .xml files available in the META-INF/spring folder.
+	        			    Enumeration<JarEntry> entries = jf.entries();
+	                        while (entries.hasMoreElements()) {
+	                        	je = entries.nextElement();
+	                        	if (je.getName().startsWith("META-INF/spring/") && je.getName().endsWith(".xml")) {
+	                        		appCtxResources.add(new URL("jar:" + url.getPath() + "/" + je.getName()));
+	                        	}
+	                        }
+                            return appCtxResources;
+	        			}
+            		} catch (IOException e) {
+                        throw new ContributionReadException("Error reading manifest " + manifestFile);
+                    }
+        		}
+        	}
+        }
+
+        throw new ContributionReadException("SpringXMLComponentTypeLoader getApplicationContextResource: "
+        																+ "unable to read resource file " + url);
+    } // end method getApplicationContextResource
+
+    /**
+     * Creates a Service for the component type based on its name and Java interface
+     */
+    public Service createService(Class<?> interfaze, String name) throws InvalidInterfaceException {
+        Service service = assemblyFactory.createService();
+        JavaInterfaceContract interfaceContract = javaFactory.createJavaInterfaceContract();
+        service.setInterfaceContract(interfaceContract);
+
+        // Set the name for the service
+        service.setName(name);
+
+        // Set the call interface and, if present, the callback interface
+        JavaInterface callInterface = javaFactory.createJavaInterface(interfaze);
+        service.getInterfaceContract().setInterface(callInterface);
+        if (callInterface.getCallbackClass() != null) {
+            JavaInterface callbackInterface = javaFactory.createJavaInterface(callInterface.getCallbackClass());
+            service.getInterfaceContract().setCallbackInterface(callbackInterface);
+        }
+        return service;
+    } // end method createService
+
+    /**
+     * Creates a Reference for the component type based on its name and Java interface
+     */
+    private org.apache.tuscany.sca.assembly.Reference createReference(Class<?> interfaze, String name)
+        throws InvalidInterfaceException {
+        org.apache.tuscany.sca.assembly.Reference reference = assemblyFactory.createReference();
+        JavaInterfaceContract interfaceContract = javaFactory.createJavaInterfaceContract();
+        reference.setInterfaceContract(interfaceContract);
+
+        // Set the name of the reference to the supplied name and the multiplicity of the reference
+        // to 1..1 - for Spring implementations, this is the only multiplicity supported
+        reference.setName(name);
+        reference.setMultiplicity(Multiplicity.ONE_ONE);
+
+        // Set the call interface and, if present, the callback interface
+        JavaInterface callInterface = javaFactory.createJavaInterface(interfaze);
+        reference.getInterfaceContract().setInterface(callInterface);
+        if (callInterface.getCallbackClass() != null) {
+            JavaInterface callbackInterface = javaFactory.createJavaInterface(callInterface.getCallbackClass());
+            reference.getInterfaceContract().setCallbackInterface(callbackInterface);
+        }
+
+        return reference;
+    }
+    
+    private class ContextClassLoader extends ClassLoader {
+    	public ContextClassLoader(ModelResolver resolver, ProcessorContext context) {
+    		super();
+    		this.resolver = resolver;
+    		this.context = context;
+    	}
+
+		private ModelResolver resolver;
+		private ProcessorContext context;
+		
+		@Override
+		protected Class<?> findClass(String name) throws ClassNotFoundException {
+			return SpringXMLComponentTypeLoader.this.resolveClass(resolver, name, context);
+		}
+		
+		@Override
+		protected URL findResource(String name) {
+			try {
+				return resolveLocation(resolver, name, context);
+			} catch (Exception e) {
+				return null;
+			}
+		}
+		
+		@Override
+		protected Enumeration<URL> findResources(String name) throws IOException {
+			URL url = findResource(name);
+			if (url != null) {
+				return Collections.enumeration(Arrays.asList(url));
+			} else {
+				Collection<URL> urls = Collections.emptyList();
+				return Collections.enumeration(urls);
+			}
+		}
+    }
+} // end class SpringXMLComponentTypeLoader
\ No newline at end of file
diff --git a/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/invocation/ComponentTie.java b/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/invocation/ComponentTie.java
new file mode 100644
index 0000000000..b97c02d216
--- /dev/null
+++ b/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/invocation/ComponentTie.java
@@ -0,0 +1,41 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.implementation.spring.invocation;
+
+/**
+ * This is the Tuscany side tie for the corresponding Spring runtime side stub class.
+ * It enables the Tuscany code to invoke methods on a Spring context without
+ * needing to know about any Spring classes. See the ComponentStub class
+ * in the implementation-spring-runtime module for what the stub does. 
+ */
+import org.apache.tuscany.sca.runtime.RuntimeComponent;
+
+public class ComponentTie {
+
+    private RuntimeComponent component;
+    
+    public ComponentTie(RuntimeComponent component) {
+        this.component = component;
+    }
+
+    public Object getService(Class<?> type, String name) {
+        return component.getComponentContext().getService(type, name);
+    }
+}
diff --git a/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/invocation/PropertyValueTie.java b/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/invocation/PropertyValueTie.java
new file mode 100644
index 0000000000..89d14961ac
--- /dev/null
+++ b/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/invocation/PropertyValueTie.java
@@ -0,0 +1,53 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.implementation.spring.invocation;
+
+import java.util.List;
+
+import org.apache.tuscany.sca.assembly.ComponentProperty;
+import org.apache.tuscany.sca.implementation.java.injection.JavaPropertyValueObjectFactory;
+import org.apache.tuscany.sca.runtime.RuntimeComponent;
+
+/**
+ * This is the Tuscany side tie for the corresponding Spring runtime side stub class.
+ * It enables the Tuscany code to invoke methods on a Spring context without
+ * needing to know about any Spring classes. See the PropertyValueStub class
+ * in the implementation-spring-runtime module for what the stub does. 
+ */
+public class PropertyValueTie {
+
+    private RuntimeComponent component;
+    private JavaPropertyValueObjectFactory propertyFactory;
+    
+    public PropertyValueTie(RuntimeComponent component, JavaPropertyValueObjectFactory propertyFactory) {
+        this.component = component;
+        this.propertyFactory = propertyFactory;
+    }
+
+    public Object getPropertyObj(Class<?> type, String name) {
+        List<ComponentProperty> props = component.getProperties();
+        for (ComponentProperty prop : props) {
+            if (prop.getName().equals(name)) {
+                return propertyFactory.createValueFactory(prop, prop.getValue(), type).getInstance();
+            } 
+        }         
+        return null; // property name not found
+    }
+}
diff --git a/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/invocation/SpringContextStub.java b/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/invocation/SpringContextStub.java
new file mode 100644
index 0000000000..dcb9a53a33
--- /dev/null
+++ b/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/invocation/SpringContextStub.java
@@ -0,0 +1,134 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * 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.spring.invocation;
+
+import java.lang.reflect.Constructor;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.util.List;
+
+import org.apache.tuscany.sca.core.invocation.ProxyFactory;
+import org.apache.tuscany.sca.implementation.java.injection.JavaPropertyValueObjectFactory;
+import org.apache.tuscany.sca.implementation.spring.SpringImplementation;
+import org.apache.tuscany.sca.runtime.RuntimeComponent;
+
+/**
+ * This is the Tuscany side stub for the corresponding runtime tie class.
+ * It enables the Tuscany code to invoke methods on a Spring context without
+ * needing to know about any Spring classes. See the SpringContextTie class
+ * in the implementation-spring-runtime module for what the tie does. 
+ */
+public class SpringContextStub {
+
+    private Object tie;
+    private Method startMethod;
+    private Method closeMethod;
+    private Method getBeanMethod;
+
+    public SpringContextStub(RuntimeComponent component,
+                               SpringImplementation implementation,
+                               ProxyFactory proxyService,
+                               JavaPropertyValueObjectFactory propertyValueObjectFactory) {
+
+        initTie(component, implementation, propertyValueObjectFactory);        
+
+    }
+
+    private void initTie(RuntimeComponent component,
+                         SpringImplementation implementation,
+                         JavaPropertyValueObjectFactory propertyValueObjectFactory) {
+
+        // TODO: what class loader to use?
+        ClassLoader cl = Thread.currentThread().getContextClassLoader();
+
+        try {
+
+            Class<?> stubClass = Class.forName("org.apache.tuscany.sca.implementation.spring.runtime.context.SpringImplementationStub", true, cl);
+            Constructor<?> stubConstructor = stubClass.getConstructor(new Class<?>[]{Object.class});
+            Object stub = stubConstructor.newInstance(new SpringImplementationTie(implementation, component, propertyValueObjectFactory));
+
+            Class<?> tieClass = Class.forName("org.apache.tuscany.sca.implementation.spring.runtime.context.SpringContextTie", true, cl);
+            Constructor<?> tieConstructor = tieClass.getConstructor(new Class<?>[]{stubClass, List.class});
+            this.tie = tieConstructor.newInstance(stub, implementation.getResource());
+            
+            this.startMethod = tieClass.getMethod("start");
+            this.closeMethod = tieClass.getMethod("close");
+            this.getBeanMethod = tieClass.getMethod("getBean", String.class);
+
+        } catch (ClassNotFoundException e) {
+            throw new RuntimeException(e);
+        } catch (SecurityException e) {
+            throw new RuntimeException(e);
+        } catch (NoSuchMethodException e) {
+            throw new RuntimeException(e);
+        } catch (IllegalArgumentException e) {
+            throw new RuntimeException(e);
+        } catch (InstantiationException e) {
+            throw new RuntimeException(e);
+        } catch (IllegalAccessException e) {
+            throw new RuntimeException(e);
+        } catch (InvocationTargetException e) {
+        	e.printStackTrace();
+            throw new RuntimeException(e);
+        }
+    }
+
+    public void start() {
+        try {
+            startMethod.invoke(tie);
+        } catch (IllegalArgumentException e) {
+            throw new RuntimeException(e);
+        } catch (IllegalAccessException e) {
+            throw new RuntimeException(e);
+        } catch (InvocationTargetException e) {
+        	e.printStackTrace();
+            throw new RuntimeException(e);
+        }
+    }
+
+    public void close() {
+        try {
+            closeMethod.invoke(tie);
+        } catch (IllegalArgumentException e) {
+            throw new RuntimeException(e);
+        } catch (IllegalAccessException e) {
+            throw new RuntimeException(e);
+        } catch (InvocationTargetException e) {
+        	e.printStackTrace();
+            throw new RuntimeException(e);
+        }
+    }
+
+    public Object getBean(String id) throws SpringInvocationException {
+        try {
+
+            return getBeanMethod.invoke(tie, id);
+
+        } catch (IllegalArgumentException e) {
+            throw new RuntimeException(e);
+        } catch (IllegalAccessException e) {
+            throw new RuntimeException(e);
+        } catch (InvocationTargetException e) {
+        	e.printStackTrace();
+            throw new RuntimeException(e);
+        }
+    }
+
+}
\ No newline at end of file
diff --git a/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/invocation/SpringImplementationProvider.java b/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/invocation/SpringImplementationProvider.java
new file mode 100644
index 0000000000..0ecd00d5a8
--- /dev/null
+++ b/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/invocation/SpringImplementationProvider.java
@@ -0,0 +1,85 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.implementation.spring.invocation;
+
+import org.apache.tuscany.sca.core.invocation.ProxyFactory;
+import org.apache.tuscany.sca.implementation.java.injection.JavaPropertyValueObjectFactory;
+import org.apache.tuscany.sca.implementation.spring.SpringImplementation;
+import org.apache.tuscany.sca.interfacedef.Operation;
+import org.apache.tuscany.sca.invocation.Invoker;
+import org.apache.tuscany.sca.provider.ImplementationProvider;
+import org.apache.tuscany.sca.runtime.RuntimeComponent;
+import org.apache.tuscany.sca.runtime.RuntimeComponentService;
+
+/**
+ * A provider class for runtime Spring implementation instances
+ * @version $Rev$ $Date$ 
+ */
+public class SpringImplementationProvider implements ImplementationProvider {
+    private RuntimeComponent component;
+    
+    // A Spring application context object
+    private SpringContextStub springContext;
+    
+    private SpringImplementation implementation;
+    
+    private JavaPropertyValueObjectFactory propertyValueObjectFactory;
+
+    /**
+     * Constructor for the provider - takes a component definition and a Spring implementation
+     * description
+     * @param component - the component in the assembly
+     * @param implementation - the implementation
+     */
+    public SpringImplementationProvider(RuntimeComponent component,
+                                        SpringImplementation implementation,
+                                        ProxyFactory proxyService,
+                                        JavaPropertyValueObjectFactory propertyValueObjectFactory) {
+        super();
+        this.implementation = implementation;
+        this.component = component;
+        this.propertyValueObjectFactory = propertyValueObjectFactory;
+
+        springContext = new SpringContextStub(component, implementation, proxyService, propertyValueObjectFactory);        
+        
+    } // end constructor
+
+    public Invoker createInvoker(RuntimeComponentService service, Operation operation) {
+        return new SpringInvoker(component, springContext, service, operation);
+    }
+    
+    public boolean supportsOneWayInvocation() {
+        return false;
+    }
+
+    /**
+     * Start this Spring implementation instance
+     */
+    public void start() {
+        springContext.start();
+    }
+
+    /**
+     * Stop this implementation instance
+     */
+    public void stop() {
+    	springContext.close();
+    }
+
+} // end class SpringImplementationProvider
diff --git a/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/invocation/SpringImplementationProviderFactory.java b/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/invocation/SpringImplementationProviderFactory.java
new file mode 100644
index 0000000000..5dfdbffd84
--- /dev/null
+++ b/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/invocation/SpringImplementationProviderFactory.java
@@ -0,0 +1,77 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.sca.implementation.spring.invocation;
+
+import org.apache.tuscany.sca.core.ExtensionPointRegistry;
+import org.apache.tuscany.sca.core.invocation.ExtensibleProxyFactory;
+import org.apache.tuscany.sca.core.invocation.ProxyFactory;
+import org.apache.tuscany.sca.core.invocation.ProxyFactoryExtensionPoint;
+import org.apache.tuscany.sca.databinding.impl.MediatorImpl;
+import org.apache.tuscany.sca.implementation.java.injection.JavaPropertyValueObjectFactory;
+import org.apache.tuscany.sca.implementation.spring.SpringImplementation;
+import org.apache.tuscany.sca.provider.ImplementationProvider;
+import org.apache.tuscany.sca.provider.ImplementationProviderFactory;
+import org.apache.tuscany.sca.runtime.RuntimeComponent;
+
+/**
+ * ImplementationProviderFactory for Spring implementation type
+ * @version $Rev$ $Date$ 
+ *
+ */
+public class SpringImplementationProviderFactory implements ImplementationProviderFactory<SpringImplementation> {
+
+    private ProxyFactory proxyFactory;
+    private JavaPropertyValueObjectFactory propertyFactory;
+
+    /**
+     * Simple constructor
+     *
+     */
+    public SpringImplementationProviderFactory(ExtensionPointRegistry extensionPoints) {
+        super();
+        
+        ProxyFactoryExtensionPoint proxyFactories = extensionPoints.getExtensionPoint(ProxyFactoryExtensionPoint.class); 
+        proxyFactory = new ExtensibleProxyFactory(proxyFactories); 
+
+        // TODO: could the runtime have a default PropertyValueObjectFactory?
+        propertyFactory = new JavaPropertyValueObjectFactory(new MediatorImpl(extensionPoints));
+    }
+
+    /**
+     * Returns a SpringImplementationProvider for a given component and Spring implementation
+     * @param component the component for which implementation instances are required
+     * @param implementation the Spring implementation with details of the component
+     * implementation
+     * @return the SpringImplementationProvider for the specified component
+     */
+    public ImplementationProvider createImplementationProvider(RuntimeComponent component,
+                                                               SpringImplementation implementation) {
+        return new SpringImplementationProvider(component, 
+                                                implementation, 
+                                                proxyFactory, 
+                                                propertyFactory);
+    }
+
+    /**
+     * Returns the class of the Spring implementation
+     */
+    public Class<SpringImplementation> getModelType() {
+        return SpringImplementation.class;
+    }
+} // end class SpringImplementationProviderFactory
diff --git a/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/invocation/SpringImplementationTie.java b/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/invocation/SpringImplementationTie.java
new file mode 100644
index 0000000000..6caa5207e4
--- /dev/null
+++ b/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/invocation/SpringImplementationTie.java
@@ -0,0 +1,147 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * 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.spring.invocation;
+
+import java.util.List;
+
+import org.apache.tuscany.sca.assembly.ComponentProperty;
+import org.apache.tuscany.sca.assembly.Property;
+import org.apache.tuscany.sca.assembly.Reference;
+import org.apache.tuscany.sca.core.factory.ObjectFactory;
+import org.apache.tuscany.sca.implementation.java.injection.JavaPropertyValueObjectFactory;
+import org.apache.tuscany.sca.implementation.spring.SpringImplementation;
+import org.apache.tuscany.sca.interfacedef.java.JavaInterface;
+import org.apache.tuscany.sca.runtime.RuntimeComponent;
+
+/**
+ * This is the Tuscany side tie for the corresponding runtime stub class.
+ * It enables the Sping code in the runtime module to invoke methods on a
+ * Tuscany SpringImplementation without the Spring runtime module
+ * needing to know about any Tuscany classes. See the SpringImplementationStub class
+ * in the implementation-spring-runtime module for what the stub does. 
+ */
+public class SpringImplementationTie {
+
+    private SpringImplementation implementation;
+    private RuntimeComponent component;
+    private JavaPropertyValueObjectFactory propertyFactory;
+    
+    public SpringImplementationTie(SpringImplementation implementation, RuntimeComponent component, JavaPropertyValueObjectFactory propertyFactory) {
+        this.implementation = implementation;
+        this.component = component;
+        this.propertyFactory = propertyFactory;
+    }
+    
+    public String getURI() {
+        throw new IllegalStateException("Not yet impl");
+    }
+
+    public String getComponentName() {
+        return component.getName();
+    }
+    /**
+     * Method to create a Java Bean for a Property value
+     * @param <B> the class type of the Bean
+     * @param requiredType - a Class object for the required type
+     * @param name - the Property name
+     * @return - a Bean of the specified property, with value set
+     */
+    private <B> B getPropertyBean(Class<?> requiredType, String name) {
+        B propertyObject = null;
+        // Get the component's list of properties
+        List<ComponentProperty> props = component.getProperties();
+        for (ComponentProperty prop : props) {
+            if (prop.getName().equals(name)) {
+                // On finding the property, create a factory for it and create a Bean using
+                // the factory
+                ObjectFactory<?> factory = propertyFactory.createValueFactory(prop, prop.getValue(), requiredType);
+                propertyObject = (B)factory.getInstance();
+            } // end if
+        } // end for
+
+        return propertyObject;
+    }
+
+    /**
+     * Creates a proxy Bean for a reference
+     * @param <B> the Business interface type for the reference
+     * @param businessInterface - the business interface as a Class
+     * @param referenceName - the name of the Reference
+     * @return an Bean of the type defined by <B>
+     */
+    private <B> B getService(Class<B> businessInterface, String referenceName) {
+        return component.getComponentContext().getService(businessInterface, referenceName);
+    }
+
+    /**
+     * Get a Bean for a reference or for a property.
+     *
+     * @param name - the name of the Bean required
+     * @param requiredType - the required type of the Bean (either a Java class or a Java interface)
+     * @return Object - a Bean which matches the requested bean
+     */
+    public Object getBean(String name, Class<?> requiredType) {
+        // The expectation is that the requested Bean is either a reference or a property
+        // from the Spring context
+        for (Reference reference : implementation.getReferences()) {
+            if (reference.getName().equals(name)) {
+                // Extract the Java interface for the reference (it can't be any other interface type
+                // for a Spring application context)
+                if (requiredType == null) {
+                    JavaInterface javaInterface = (JavaInterface)reference.getInterfaceContract().getInterface();
+                    requiredType = javaInterface.getJavaClass();
+                }
+                // Create and return the proxy for the reference
+                return getService(requiredType, reference.getName());
+            } // end if
+        } // end for
+
+        // For a property, get the name and the required Java type and create a Bean
+        // of that type with the value inserted.
+        for (Property property : implementation.getProperties()) {
+            if (property.getName().equals(name)) {
+                if (requiredType == null) {
+                    // The following code only deals with a subset of types and was superceded
+                    // by the information from the implementation (which uses Classes as found
+                    // in the Spring implementation itself.
+                    //requiredType = JavaXMLMapper.getJavaType( property.getXSDType() );
+                    requiredType = implementation.getPropertyClass(name);
+                }
+                return getPropertyBean(requiredType, property.getName());
+            } // end if
+        } // end for
+        // TODO: NoSuchBeanException
+        throw new RuntimeException("Unable to find Bean with name " + name);
+
+    } // end method getBean( String, Class )
+    
+    public Object getComponentTie() {
+        return new ComponentTie(component);
+    }
+
+    public Object getPropertyValueTie() {
+        return new PropertyValueTie(component, propertyFactory);
+    }
+    
+    public ClassLoader getClassLoader() {
+    	return implementation.getClassLoader();
+    }
+
+}
\ No newline at end of file
diff --git a/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/invocation/SpringInvocationException.java b/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/invocation/SpringInvocationException.java
new file mode 100644
index 0000000000..6a23830aa9
--- /dev/null
+++ b/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/invocation/SpringInvocationException.java
@@ -0,0 +1,40 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.implementation.spring.invocation;
+
+/**
+ * @version $Rev$ $Date$
+ */
+public class SpringInvocationException extends Exception {
+
+    private static final long serialVersionUID = -1157790036638157513L;
+
+    public SpringInvocationException(String msg) {
+        super(msg);
+    }
+    
+    public SpringInvocationException(Throwable e) {
+        super(e);
+    }
+    
+    public SpringInvocationException(String msg,Throwable e) {
+        super(msg,e);
+    }
+
+}
diff --git a/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/invocation/SpringInvoker.java b/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/invocation/SpringInvoker.java
new file mode 100644
index 0000000000..1f9796ccc4
--- /dev/null
+++ b/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/invocation/SpringInvoker.java
@@ -0,0 +1,124 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * 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.spring.invocation;
+
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+
+import org.apache.tuscany.sca.implementation.spring.SpringBeanElement;
+import org.apache.tuscany.sca.implementation.spring.SpringImplementation;
+import org.apache.tuscany.sca.interfacedef.Operation;
+import org.apache.tuscany.sca.interfacedef.java.impl.JavaInterfaceUtil;
+import org.apache.tuscany.sca.invocation.Invoker;
+import org.apache.tuscany.sca.invocation.Message;
+import org.apache.tuscany.sca.runtime.RuntimeComponent;
+import org.apache.tuscany.sca.runtime.RuntimeComponentService;
+
+/**
+ * Initial implementation of a Spring bean invoker
+ * @version $Rev$ $Date$ 
+ */
+public class SpringInvoker implements Invoker {
+
+    private Method theMethod = null;
+    private Object bean;
+    private SpringBeanElement beanElement;
+    private boolean badInvoker = false;
+
+    private SpringContextStub springContext;
+    private Operation operation;
+
+    /**
+     * SpringInvoker constructor
+     * @param component - the Spring component to invoke
+     * @param service - the service to invoke
+     * @param operation - the operation to invoke
+     */
+    public SpringInvoker(RuntimeComponent component,
+                         SpringContextStub springContext,
+                         RuntimeComponentService service,
+                         Operation operation) {
+
+        this.springContext = springContext;
+        this.operation = operation;
+
+        // From the component and the service, identify the Spring Bean which is the target
+        SpringImplementation theImplementation = (SpringImplementation)component.getImplementation();
+        beanElement = theImplementation.getBeanFromService(service.getService());
+
+        if (beanElement == null) {
+            badInvoker = true;
+            return;
+        }
+
+    } // end constructor SpringInvoker
+
+    // Lazy-load the method to avoid timing problems with the Spring Context
+    private void setupMethod() throws SpringInvocationException{
+        try {
+            bean = springContext.getBean(beanElement.getId());
+            Class<?> beanClass = bean.getClass();
+            theMethod = JavaInterfaceUtil.findMethod(beanClass, operation);
+            //System.out.println("SpringInvoker - found method " + theMethod.getName() );
+        } catch (NoSuchMethodException e) {
+        	throw new SpringInvocationException(e);
+        }
+    }
+
+    private Object doInvoke(Object payload) throws SpringInvocationException {
+        if (theMethod == null)
+            setupMethod();
+
+        if (badInvoker)
+            throw new SpringInvocationException("Spring invoker incorrectly configured");
+        // Invoke the method on the Spring bean using the payload, returning the results
+        try {
+            Object ret;
+
+            if (payload != null && !payload.getClass().isArray()) {
+                ret = theMethod.invoke(bean, payload);
+            } else {
+                ret = theMethod.invoke(bean, (Object[])payload);
+            }
+            return ret;
+        } catch (InvocationTargetException e) {
+            throw new SpringInvocationException("Spring invoker invoke method '"+ theMethod.getName()+"' error.",e.getCause());
+        } catch (Exception e) {
+            throw new SpringInvocationException("Spring invoker invoke method '"+ theMethod.getName()+"' error.",e);
+        }
+
+    } // end method doInvoke
+
+    /**
+     * @param msg the message to invoke on the target bean
+     */
+    public Message invoke(Message msg) {
+        try {
+            Object resp = doInvoke(msg.getBody());
+            msg.setBody(resp);
+        } catch (SpringInvocationException e) {
+            msg.setFaultBody(e.getCause());
+        }catch (Throwable e) {
+            msg.setFaultBody(e);
+        }
+        //System.out.println("Spring Invoker - invoke called");
+        return msg;
+    } // end method invoke
+
+} // end class SpringInvoker
diff --git a/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/xml/SpringImplementationProcessor.java b/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/xml/SpringImplementationProcessor.java
new file mode 100644
index 0000000000..0cd85d1e33
--- /dev/null
+++ b/branches/sca-java-2.0-M4/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/xml/SpringImplementationProcessor.java
@@ -0,0 +1,230 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * 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.spring.xml;
+
+import static javax.xml.stream.XMLStreamConstants.END_ELEMENT;
+
+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.xml.Constants;
+import org.apache.tuscany.sca.assembly.xml.PolicySubjectProcessor;
+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.ExtensionPointRegistry;
+import org.apache.tuscany.sca.core.FactoryExtensionPoint;
+import org.apache.tuscany.sca.implementation.spring.SpringImplementation;
+import org.apache.tuscany.sca.implementation.spring.introspect.SpringXMLComponentTypeLoader;
+import org.apache.tuscany.sca.monitor.Monitor;
+import org.apache.tuscany.sca.monitor.Problem;
+import org.apache.tuscany.sca.monitor.Problem.Severity;
+
+/**
+ * SpringArtifactProcessor is responsible for processing the XML of an <implementation.spring.../>
+ * element in an SCA SCDL file.
+ *
+ * @version $Rev$ $Date$
+ */
+public class SpringImplementationProcessor implements StAXArtifactProcessor<SpringImplementation> {
+
+    private static final String LOCATION = "location";
+    private static final String IMPLEMENTATION_SPRING = "implementation.spring";
+    private static final QName IMPLEMENTATION_SPRING_QNAME = new QName(Constants.SCA11_NS, IMPLEMENTATION_SPRING);
+    private static final String MSG_LOCATION_MISSING = "Reading implementation.spring - location attribute missing";
+
+    private ExtensionPointRegistry registry;
+    private AssemblyFactory assemblyFactory;
+    private PolicySubjectProcessor policyProcessor;
+    
+
+    private FactoryExtensionPoint factories;
+
+    public SpringImplementationProcessor(ExtensionPointRegistry registry) {
+        this.registry = registry;
+        this.factories = registry.getExtensionPoint(FactoryExtensionPoint.class);
+        this.assemblyFactory = factories.getFactory(AssemblyFactory.class);
+        this.policyProcessor = new PolicySubjectProcessor(registry);
+    }
+
+    /**
+     * 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-spring-validation-messages", Severity.ERROR, model, message, ex);
+	        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-spring-validation-messages", Severity.ERROR, model, message, (Object[])messageParameters);
+	        monitor.problem(problem);
+    	 }
+    }
+
+    /*
+     * Read the XML and parse out the attributes.
+     *
+     * <implementation.spring.../> has a single required attribute:
+     * "location" - which is the target URI of of an archive file or a directory that contains the Spring
+     * application context files.
+     * If the resource identified by the location attribute is an archive file, then the file
+     * META-INF/MANIFEST.MF is read from the archive.
+     * If the location URI identifies a directory, then META-INF/MANIFEST.MF must exist
+     * underneath that directory.
+     * If the manifest file contains a header "Spring-Context" of the format:
+     *    Spring-Context ::= path ( ';' path )*
+     *
+     * Where path is a relative path with respect to the location URI, then the set of paths
+     * specified in the header identify the context configuration files.
+     * If there is no MANIFEST.MF file or no Spring-Context header within that file,
+     * then the default behaviour is to build an application context using all the *.xml files
+     * in the METAINF/spring directory.
+     */
+    public SpringImplementation read(XMLStreamReader reader, ProcessorContext context) throws ContributionReadException, XMLStreamException {
+
+        // Create the Spring implementation
+        SpringImplementation springImplementation = null;
+
+        // Read the location attribute for the spring implementation
+        String springLocation = reader.getAttributeValue(null, LOCATION);
+        if (springLocation != null) {
+        	springImplementation = new SpringImplementation();
+        	springImplementation.setLocation(springLocation);
+        	springImplementation.setUnresolved(true);
+            processComponentType(springImplementation);
+        } else {
+        	error(context.getMonitor(), "LocationAttributeMissing", reader);
+            //throw new ContributionReadException(MSG_LOCATION_MISSING);
+        }
+
+        // Read policies
+        policyProcessor.readPolicies(springImplementation, reader);
+
+        // Skip to end element
+        while (reader.hasNext()) {
+            if (reader.next() == END_ELEMENT && IMPLEMENTATION_SPRING_QNAME.equals(reader.getName())) {
+                break;
+            }
+        } // end while
+
+        return springImplementation;
+    } // end read
+
+    /*
+     * Handles the component type for the Spring implementation
+     * @param springImplementation - a Spring implementation.  The component type information
+     * is created for this implementation
+     *
+     */
+    private void processComponentType(SpringImplementation springImplementation) {
+
+        // Create a ComponentType and mark it unresolved
+        ComponentType componentType = assemblyFactory.createComponentType();
+        componentType.setUnresolved(true);
+        springImplementation.setComponentType(componentType);
+    } // end processComponentType
+
+    /*
+     * Write out the XML representation of the Spring implementation
+     * <implementation.spring location="..." />
+     */
+    public void write(SpringImplementation springImplementation, XMLStreamWriter writer, ProcessorContext context) throws ContributionWriteException, XMLStreamException {
+
+        // Write <implementation.spring>
+        writer.writeStartElement(Constants.SCA11_NS, IMPLEMENTATION_SPRING);
+        policyProcessor.writePolicyAttributes(springImplementation, writer);
+
+        if (springImplementation.getLocation() != null) {
+            writer.writeAttribute(LOCATION, springImplementation.getLocation());
+        }
+
+        writer.writeEndElement();
+
+    } // end write
+
+    /**
+     * Resolves the Spring implementation - loads the Spring application-context XML and
+     * derives the spring implementation componentType from it
+     */
+    public void resolve(SpringImplementation springImplementation, ModelResolver resolver, ProcessorContext context)
+        throws ContributionResolveException {
+
+    	if (springImplementation == null)
+    		return;
+
+    	Monitor monitor = context.getMonitor();
+        /* Load the Spring component type by reading the Spring application context */
+        SpringXMLComponentTypeLoader springLoader =
+            new SpringXMLComponentTypeLoader(registry, monitor);
+        try {
+            // Load the Spring Implementation information from its application context file...
+            springLoader.load(springImplementation, resolver, context);
+        } catch (ContributionReadException e) {
+        	ContributionResolveException ce = new ContributionResolveException(e);
+        	error(monitor, "ContributionResolveException", resolver, ce);
+            throw ce;
+        }
+
+        ComponentType ct = springImplementation.getComponentType();
+        if (ct.isUnresolved()) {
+            // If the introspection fails to resolve, try to find a side file...
+            ComponentType componentType = resolver.resolveModel(ComponentType.class, ct, context);
+            if (componentType.isUnresolved()) {
+            	error(monitor, "UnableToResolveComponentType", resolver);
+                //throw new ContributionResolveException("SpringArtifactProcessor: unable to resolve componentType for Spring component");
+            } else {
+                springImplementation.setComponentType(componentType);
+                springImplementation.setUnresolved(false);
+           }
+
+        } // end if
+
+    } // end method resolve
+
+    public QName getArtifactType() {
+        return IMPLEMENTATION_SPRING_QNAME;
+    }
+
+    public Class<SpringImplementation> getModelType() {
+        return SpringImplementation.class;
+    }
+
+} // end class SpringArtifactProcessor