Branch for 1.5.1

git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@791397 13f79535-47bb-0310-9956-ffa450edef68

20 files changed, 2131 insertions, 0 deletions

diff --git a/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/ContributionClassLoaderProvider.java b/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/ContributionClassLoaderProvider.java
new file mode 100644
index 0000000000..aa314dd13f
--- /dev/null
+++ b/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/ContributionClassLoaderProvider.java
@@ -0,0 +1,44 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.contribution.java;
+
+import org.apache.tuscany.sca.contribution.Contribution;
+
+/**
+ * A pluggable utility to provide a classloader for a given contribution
+ */
+public interface ContributionClassLoaderProvider {
+    
+    /**
+     * Get the contribution type that this object will provide 
+     * classloaders for. Takes values from o.a.t.s.contribution.PackageType
+     * 
+     * @return
+     */
+    String getContributionType();
+    
+    /**
+     * Get the classloader for the given contribution
+     * @param contribution
+     * @param parent
+     * @return
+     */
+    ClassLoader getClassLoader(Contribution contribution, ClassLoader parent);
+}
diff --git a/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/ContributionClassloaderProviderExtensionPoint.java b/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/ContributionClassloaderProviderExtensionPoint.java
new file mode 100644
index 0000000000..b714090ff2
--- /dev/null
+++ b/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/ContributionClassloaderProviderExtensionPoint.java
@@ -0,0 +1,55 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.contribution.java;
+
+/**
+ * An extension point for contribution classloaders. Contribution 
+ * classloaders respect the classloading strategy for the contribution
+ * in question. For example, a JAR contribution loads classes from its 
+ * root directory while an EAR contribution follows the JEE classloading 
+ * strategy. The choice of classloader is driven by the type of 
+ * contribution being loaded. 
+ *
+ * @version $Rev$ $Date$
+ */
+public interface ContributionClassloaderProviderExtensionPoint {
+    
+    /**
+     * Add a contribution classloader provider extension.
+     * 
+     * @param provider The provider to add
+     */
+    void addProvider(ContributionClassLoaderProvider provider);
+    
+    /**
+     * Remove a contribution classloader provider extension.
+     *  
+     * @param provider The provider to remove
+     */
+    void removeProvider(ContributionClassLoaderProvider provider); 
+    
+    /**
+     * Get a contribution classloader provider for the given contribution type.
+     * @param contributionType the lookup key 
+     * @return The provider
+     */
+    ContributionClassLoaderProvider getProvider(String contributionType);
+
+}
diff --git a/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/DefaultContributionClassLoaderProvider.java b/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/DefaultContributionClassLoaderProvider.java
new file mode 100644
index 0000000000..8fd1898ad6
--- /dev/null
+++ b/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/DefaultContributionClassLoaderProvider.java
@@ -0,0 +1,47 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.contribution.java;
+
+import org.apache.tuscany.sca.contribution.Contribution;
+import org.apache.tuscany.sca.contribution.java.impl.ContributionClassLoader;
+import org.apache.tuscany.sca.core.ExtensionPointRegistry;
+
+/**
+ * The default implementation of the ContributionClassLoaderProvider
+ */
+public class DefaultContributionClassLoaderProvider implements ContributionClassLoaderProvider {
+
+    public DefaultContributionClassLoaderProvider() {
+        super();
+    }
+    
+    /**
+     * returns null as it is the default provider and applies when no specific
+     * provider has been specified
+     */
+    public String getContributionType() {
+        return null;
+    }
+
+    public ClassLoader getClassLoader(Contribution contribution, ClassLoader parent) {
+        return new ContributionClassLoader(contribution, parent);
+    }
+
+}
diff --git a/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/DefaultContributionClassloaderProviderExtensionPoint.java b/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/DefaultContributionClassloaderProviderExtensionPoint.java
new file mode 100644
index 0000000000..7ffecdf312
--- /dev/null
+++ b/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/DefaultContributionClassloaderProviderExtensionPoint.java
@@ -0,0 +1,144 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.contribution.java;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.lang.reflect.Constructor;
+import java.net.MalformedURLException;
+import java.net.URI;
+import java.net.URL;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import org.apache.tuscany.sca.contribution.Contribution;
+import org.apache.tuscany.sca.contribution.ModelFactoryExtensionPoint;
+import org.apache.tuscany.sca.contribution.processor.PackageProcessor;
+import org.apache.tuscany.sca.contribution.service.ContributionException;
+import org.apache.tuscany.sca.extensibility.ServiceDeclaration;
+import org.apache.tuscany.sca.extensibility.ServiceDiscovery;
+
+
+/**
+ * Default implementation of a contribution classloader provider extension point.
+ *
+ * @version $Rev$ $Date$
+ */
+public class DefaultContributionClassloaderProviderExtensionPoint implements ContributionClassloaderProviderExtensionPoint {
+    
+    private HashMap<String, ContributionClassLoaderProvider> providers = new HashMap<String, ContributionClassLoaderProvider>();
+    private boolean loaded;
+    
+    /**
+     * Constructs a new DefaultModelFactoryExtensionPoint.
+     */
+    public DefaultContributionClassloaderProviderExtensionPoint() {
+    }
+
+    /**
+     * Add a contribution classloader provider extension.
+     * 
+     * @param provider The provider to add
+     */
+    public void addProvider(ContributionClassLoaderProvider provider){
+        providers.put(provider.getContributionType(), provider);
+    }
+    
+    /**
+     * Remove a contribution classloader provider extension.
+     *  
+     * @param provider The provider to remove
+     */
+    public void removeProvider(ContributionClassLoaderProvider provider){
+        providers.remove(provider.getContributionType());
+    }
+    
+    /**
+     * Get a contribution classloader provider for the given contribution type.
+     * @param contributionType the lookup key 
+     * @return The provider
+     */
+    public ContributionClassLoaderProvider getProvider(String contributionType){
+        loadProviders();
+        return providers.get(contributionType);
+    }
+
+    private synchronized void loadProviders() {
+        if (loaded)
+            return;
+
+        // Get the processor service declarations
+        Set<ServiceDeclaration> processorDeclarations; 
+        try {
+            processorDeclarations = ServiceDiscovery.getInstance().getServiceDeclarations(ContributionClassLoaderProvider.class);
+        } catch (IOException e) {
+            throw new IllegalStateException(e);
+        }
+        
+        for (ServiceDeclaration processorDeclaration: processorDeclarations) {
+            Map<String, String> attributes = processorDeclaration.getAttributes();
+            
+            // Load a URL artifact processor
+            String contributionType = attributes.get("type");
+            
+            // Create a processor wrapper and register it
+            ContributionClassLoaderProvider provider = new LazyContributionClassLoaderProvider(contributionType, processorDeclaration);
+            addProvider(provider);
+        }
+        
+        loaded = true;
+    }
+
+    /**
+     * A facade for package processors.
+     */
+    private static class LazyContributionClassLoaderProvider implements ContributionClassLoaderProvider {
+        
+        private ServiceDeclaration processorDeclaration;
+        private String contributionType;
+        private ContributionClassLoaderProvider provider;
+        
+        private LazyContributionClassLoaderProvider(String contributionType, ServiceDeclaration processorDeclaration) {
+            this.processorDeclaration = processorDeclaration;
+            this.contributionType = contributionType;
+        }
+
+        public String getContributionType() {
+            return contributionType;
+        }
+        
+        @SuppressWarnings("unchecked")
+        public ClassLoader getClassLoader(Contribution contribution, ClassLoader parent){
+            if (provider == null) {
+                try {
+                    Class<ContributionClassLoaderProvider> providerClass = (Class<ContributionClassLoaderProvider>)processorDeclaration.loadClass();
+                    Constructor<ContributionClassLoaderProvider> constructor = providerClass.getConstructor();
+                    provider = constructor.newInstance();
+                } catch (Exception e) {
+                    throw new IllegalStateException(e);
+                }
+            }
+            return provider.getClassLoader(contribution, parent);
+        }
+    }
+
+}
diff --git a/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/DefaultJavaImportExportFactory.java b/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/DefaultJavaImportExportFactory.java
new file mode 100644
index 0000000000..886c61c00a
--- /dev/null
+++ b/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/DefaultJavaImportExportFactory.java
@@ -0,0 +1,30 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.contribution.java;
+
+import org.apache.tuscany.sca.contribution.java.impl.JavaImportExportFactoryImpl;
+
+/**
+ * Default Java Import/Export Factory implementation
+ * 
+ * @version $Rev$ $Date$
+ */
+public class DefaultJavaImportExportFactory extends JavaImportExportFactoryImpl implements JavaImportExportFactory {
+}
diff --git a/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/JavaExport.java b/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/JavaExport.java
new file mode 100644
index 0000000000..41e93ec148
--- /dev/null
+++ b/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/JavaExport.java
@@ -0,0 +1,43 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.contribution.java;
+
+import org.apache.tuscany.sca.contribution.Export;
+
+/**
+ * Base Java Export model interface
+ * 
+ * @version $Rev$ $Date$
+ */
+public interface JavaExport extends Export {
+    /**
+     * Get java package that identifies the import
+     * 
+     * @return The package name
+     */
+    String getPackage();
+
+    /**
+     * Set java package that identifies the import
+     * 
+     * @param packageName The package name
+     */
+    void setPackage(String packageName);
+}
diff --git a/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/JavaImport.java b/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/JavaImport.java
new file mode 100644
index 0000000000..d3568f6283
--- /dev/null
+++ b/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/JavaImport.java
@@ -0,0 +1,58 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.contribution.java;
+
+import org.apache.tuscany.sca.contribution.Import;
+
+/**
+ * Base Java Import model interface
+ * 
+ * @version $Rev$ $Date$
+ */
+public interface JavaImport extends Import {
+
+    /**
+     * Get the location used to resolve the definitions for this import
+     * 
+     * @return The import location
+     */
+    String getLocation();
+
+    /**
+     * Set the location used to resolve the definitions for this import
+     * 
+     * @param location The import location
+     */
+    void setLocation(String location);
+
+    /**
+     * Get java package that identifies the import
+     * 
+     * @return The package name
+     */
+    String getPackage();
+
+    /**
+     * Set java package that identifies the import
+     * 
+     * @param packageName The package name
+     */
+    void setPackage(String packageName);
+}
diff --git a/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/JavaImportExportFactory.java b/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/JavaImportExportFactory.java
new file mode 100644
index 0000000000..af2ca9cd57
--- /dev/null
+++ b/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/JavaImportExportFactory.java
@@ -0,0 +1,42 @@
+/*

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

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

+ * distributed with this work for additional information

+ * regarding copyright ownership.  The ASF licenses this file

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

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

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

+ * 

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

+ * 

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

+ * software distributed under the License is distributed on an

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

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

+ * specific language governing permissions and limitations

+ * under the License.    

+ */

+

+package org.apache.tuscany.sca.contribution.java;

+

+/**

+ * Base Java Import/Export model factory

+ * 

+ * @version $Rev$ $Date$

+ */

+public interface JavaImportExportFactory {

+

+    /**

+     * Create a java import model object

+     * 

+     * @return The new JavaImport model object

+     */

+    JavaImport createJavaImport();

+    

+    /**

+     * Create a java export model object

+     * 

+     * @return The new JavaExport model object

+     */

+    JavaExport createJavaExport();

+}

diff --git a/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/ClassLoaderModelResolver.java b/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/ClassLoaderModelResolver.java
new file mode 100644
index 0000000000..e1243dbc6a
--- /dev/null
+++ b/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/ClassLoaderModelResolver.java
@@ -0,0 +1,168 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.contribution.java.impl;
+
+import java.io.IOException;
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.net.URLClassLoader;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Enumeration;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import org.apache.tuscany.sca.contribution.Contribution;
+import org.apache.tuscany.sca.contribution.Import;
+import org.apache.tuscany.sca.contribution.ModelFactoryExtensionPoint;
+import org.apache.tuscany.sca.contribution.java.JavaImport;
+import org.apache.tuscany.sca.contribution.resolver.ClassReference;
+import org.apache.tuscany.sca.contribution.resolver.DefaultDelegatingModelResolver;
+import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
+import org.apache.tuscany.sca.extensibility.ServiceDiscovery;
+
+/**
+ * A Model Resolver for ClassReferences.
+ *
+ * @version $Rev$ $Date$
+ */
+public class ClassLoaderModelResolver extends URLClassLoader implements ModelResolver {
+    private Contribution contribution;
+    private Map<String, ModelResolver> importResolvers = new HashMap<String, ModelResolver>();
+    
+    private static ClassLoader parentClassLoader() {
+        ClassLoader parentClassLoader = ServiceDiscovery.getInstance().getServiceDiscoverer().getClass().getClassLoader();
+        return parentClassLoader;
+    }
+    
+    private static URL[] getContributionURLs(final Contribution contribution) throws IOException {
+        List<URL> urls = new ArrayList<URL>();
+        urls.add(new URL(contribution.getLocation()));
+        urls.addAll(ContributionHelper.getNestedJarUrls(contribution));
+        return urls.toArray(new URL[urls.size()]);
+    }
+
+    public ClassLoaderModelResolver(final Contribution contribution, ModelFactoryExtensionPoint modelFactories) throws IOException {
+        super(getContributionURLs(contribution), parentClassLoader());
+        this.contribution = contribution;
+        
+        // Index Java import resolvers by package name
+        Map<String, List<ModelResolver>> resolverMap = new HashMap<String, List<ModelResolver>>();
+        for (Import import_: this.contribution.getImports()) {
+            if (import_ instanceof JavaImport) {
+                JavaImport javaImport = (JavaImport)import_;
+                List<ModelResolver> resolvers = resolverMap.get(javaImport.getPackage());
+                if (resolvers == null) {
+                    resolvers = new ArrayList<ModelResolver>();
+                    resolverMap.put(javaImport.getPackage(), resolvers);
+                }
+                resolvers.add(javaImport.getModelResolver());
+            }
+        }
+        
+        // Create a delegating model resolver for each imported package
+        for (Map.Entry<String, List<ModelResolver>> entry: resolverMap.entrySet()) {
+            importResolvers.put(entry.getKey(), new DefaultDelegatingModelResolver(entry.getValue()));
+        }
+    }
+
+    public void addModel(Object resolved) {
+        throw new IllegalStateException();
+    }
+
+    public Object removeModel(Object resolved) {
+        throw new IllegalStateException();
+    }
+
+    public <T> T resolveModel(Class<T> modelClass, T unresolved) {
+        if (!(unresolved instanceof ClassReference)) {
+            return unresolved;
+        }
+        
+        try {
+            
+            // Load the class and return a class reference for it
+            String className = ((ClassReference)unresolved).getClassName();
+            Class<?> clazz = Class.forName(className, true, this);
+            return modelClass.cast(new ClassReference(clazz));
+            
+        } catch (ClassNotFoundException e) {
+            return unresolved;
+        } catch (NoClassDefFoundError e) {
+            return unresolved;
+        }
+    }
+    
+    @Override
+    public URL findResource(String name) {
+        
+        //TODO delegate to the Java import resolvers
+        
+        URL url = super.findResource(name);
+        return url;
+    }
+
+    @Override
+    public Enumeration<URL> findResources(String name) throws IOException {
+        
+        //TODO delegate to the Java import resolvers
+        //Enumeration<URL> importedResources;
+        
+        Enumeration<URL> resources = super.findResources(name);
+        List<URL> allResources = new ArrayList<URL>(); 
+        //for (; importedResources.hasMoreElements(); ) {
+        //    allResources.add(importedResources.nextElement());
+        //}
+        for (; resources.hasMoreElements(); ) {
+            allResources.add(resources.nextElement());
+        }
+        return Collections.enumeration(allResources);
+    }
+    
+    @Override
+    protected Class<?> findClass(String name) throws ClassNotFoundException {
+        
+        // Extract the package name
+        int d = name.lastIndexOf('.');
+        String packageName;
+        if (d != -1) {
+            packageName = name.substring(0, d);
+        } else {
+            packageName = null;
+        }
+        
+        // First try to load the class using the Java import resolvers
+        ModelResolver importResolver = importResolvers.get(packageName);
+        if (importResolver != null) {
+            ClassReference classReference = importResolver.resolveModel(ClassReference.class, new ClassReference(name));
+            if (!classReference.isUnresolved()) {
+                return classReference.getJavaClass();
+            }
+        }
+
+        // Next, try to load the class from the current contribution
+        Class<?> clazz = super.findClass(name);
+        return clazz;
+    }
+    
+}
diff --git a/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/ClassReferenceModelResolver.java b/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/ClassReferenceModelResolver.java
new file mode 100644
index 0000000000..0b1c035ff4
--- /dev/null
+++ b/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/ClassReferenceModelResolver.java
@@ -0,0 +1,177 @@
+/*

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

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

+ * distributed with this work for additional information

+ * regarding copyright ownership.  The ASF licenses this file

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

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

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

+ * 

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

+ * 

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

+ * software distributed under the License is distributed on an

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

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

+ * specific language governing permissions and limitations

+ * under the License.    

+ */

+

+package org.apache.tuscany.sca.contribution.java.impl;

+

+import java.lang.ref.WeakReference;

+import java.lang.reflect.Constructor;

+import java.security.AccessController;

+import java.security.PrivilegedAction;

+import java.util.HashMap;

+import java.util.Map;

+

+import org.apache.tuscany.sca.contribution.Contribution;

+import org.apache.tuscany.sca.contribution.java.ContributionClassLoaderProvider;

+import org.apache.tuscany.sca.contribution.java.ContributionClassloaderProviderExtensionPoint;

+import org.apache.tuscany.sca.contribution.java.DefaultContributionClassLoaderProvider;

+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.UtilityExtensionPoint;

+import org.apache.tuscany.sca.extensibility.ServiceDiscovery;

+

+/**

+ * A Model Resolver for ClassReferences.

+ *

+ * @version $Rev: 557916 $ $Date: 2007-07-20 01:04:40 -0700 (Fri, 20 Jul 2007) $

+ */

+public class ClassReferenceModelResolver implements ModelResolver {

+    private final ExtensionPointRegistry registry;

+    private final Contribution contribution;

+    private WeakReference<ClassLoader> classLoader;

+    private Map<String, ClassReference> map = new HashMap<String, ClassReference>();

+

+    private ModelResolver osgiResolver;

+

+    public ClassReferenceModelResolver(final Contribution contribution, ExtensionPointRegistry registry) {

+        this.contribution = contribution;

+        this.registry = registry;

+        if (this.contribution != null) {

+            // Allow privileged access to get ClassLoader. Requires RuntimePermission in security policy.

+            // ClassLoader cl = contribution.getClassLoader();

+            ClassLoader cl = AccessController.doPrivileged(new PrivilegedAction<ClassLoader>() {

+                public ClassLoader run() {

+                    return contribution.getClassLoader();

+                }

+            });           

+

+            if (cl == null) {

+                // Allow privileged access to get ClassLoader. Requires RuntimePermission in security policy.

+                //ClassLoader contextClassLoader = AccessController.doPrivileged(new PrivilegedAction<ClassLoader>() {

+                //    public ClassLoader run() {

+                //        return Thread.currentThread().getContextClassLoader();

+                //    }

+                //});

+                ClassLoader contextClassLoader = ServiceDiscovery.getInstance().getServiceDiscoverer().getClass().getClassLoader();

+                ContributionClassLoaderProvider provider = null;

+                try {

+                    ContributionClassloaderProviderExtensionPoint providers = 

+                        registry.getExtensionPoint(ContributionClassloaderProviderExtensionPoint.class);

+                    

+                    provider = providers.getProvider(contribution.getType());

+

+                } catch (Throwable e) {

+                    // Ignore errors

+                }

+                if (provider == null) {

+                    provider = new DefaultContributionClassLoaderProvider();

+                }

+                cl = provider.getClassLoader(contribution, contextClassLoader);

+                contribution.setClassLoader(cl);

+            }

+            this.classLoader = new WeakReference<ClassLoader>(cl);

+        } else {

+            // This path should be used only for unit testing.

+            // Allow privileged access to get ClassLoader. Requires RuntimePermission in security policy.

+            // this.classLoader = new WeakReference<ClassLoader>(this.getClass().getClassLoader());

+            ClassLoader cl = AccessController.doPrivileged(new PrivilegedAction<ClassLoader>() {

+                public ClassLoader run() {

+                    return this.getClass().getClassLoader();

+                }

+            });           

+            this.classLoader = new WeakReference<ClassLoader>( cl );

+        }

+

+        try {

+            Class<?> osgiResolverClass =

+                Class.forName("org.apache.tuscany.sca.contribution.osgi.impl.OSGiClassReferenceModelResolver");

+            if (osgiResolverClass != null) {

+                Constructor constructor =

+                    osgiResolverClass.getConstructor(Contribution.class, ExtensionPointRegistry.class);

+                this.osgiResolver = (ModelResolver)constructor.newInstance(contribution, registry);

+            }

+        } catch (Throwable e) {

+            // Ignore error, non-OSGi classloading is used in this case

+        }

+    }

+

+    public void addModel(Object resolved) {

+        ClassReference clazz = (ClassReference)resolved;

+        map.put(clazz.getClassName(), clazz);

+    }

+

+    public Object removeModel(Object resolved) {

+        return map.remove(((ClassReference)resolved).getClassName());

+    }

+

+  

+

+    public <T> T resolveModel(Class<T> modelClass, T unresolved) {

+        if (!(unresolved instanceof ClassReference)) {

+            return unresolved;

+        }

+        Object resolved = map.get(((ClassReference)unresolved).getClassName());

+

+        if (resolved != null) {

+            return modelClass.cast(resolved);

+        }

+

+        //Load a class on demand

+        Class clazz = null;

+        

+        if (osgiResolver != null) {

+            resolved = osgiResolver.resolveModel(modelClass, unresolved);

+            clazz = ((ClassReference)resolved).getJavaClass();

+        }

+        

+        if (clazz == null) {

+            try {

+            	// Search contribution ClassLoader (which has visibility of classes in the contribution

+            	// as well as explicitly imported packages from other contributions)

+                clazz = Class.forName(((ClassReference)unresolved).getClassName(), true, classLoader.get());

+            } catch (ClassNotFoundException e) {

+            } catch (NoClassDefFoundError e) {

+            }

+        }

+

+        if (clazz != null) {

+            //if we load the class            

+            // Store a new ClassReference wrapping the loaded class

+            ClassReference classReference = new ClassReference(clazz);

+            map.put(clazz.getName(), classReference);

+

+            // Return the resolved ClassReference

+            return modelClass.cast(classReference);

+        } else {

+            return unresolved;

+        }

+

+    }

+

+    

+    /***************

+     * Helper methods

+     ***************/

+

+    private String getPackageName(ClassReference clazz) {

+        int pos = clazz.getClassName().lastIndexOf(".");

+        return clazz.getClassName().substring(0, pos);

+    }

+    

+}

diff --git a/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/ContributionClassLoader.java b/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/ContributionClassLoader.java
new file mode 100644
index 0000000000..b167d9af4e
--- /dev/null
+++ b/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/ContributionClassLoader.java
@@ -0,0 +1,390 @@
+/*

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

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

+ * distributed with this work for additional information

+ * regarding copyright ownership.  The ASF licenses this file

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

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

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

+ * 

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

+ * 

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

+ * software distributed under the License is distributed on an

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

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

+ * specific language governing permissions and limitations

+ * under the License.    

+ */

+

+package org.apache.tuscany.sca.contribution.java.impl;

+

+import java.io.IOException;

+import java.net.MalformedURLException;

+import java.net.URL;

+import java.net.URLClassLoader;

+import java.security.AccessController;

+import java.security.PrivilegedAction;

+import java.util.ArrayList;

+import java.util.Collection;

+import java.util.Collections;

+import java.util.Enumeration;

+import java.util.HashSet;

+import java.util.List;

+

+import org.apache.tuscany.sca.contribution.Contribution;

+import org.apache.tuscany.sca.contribution.Export;

+import org.apache.tuscany.sca.contribution.Import;

+import org.apache.tuscany.sca.contribution.java.JavaImport;

+

+

+public class ContributionClassLoader extends URLClassLoader {

+// public class ContributionClassLoader  {

+    

+    private Contribution contribution;

+    // private b urlClassLoader;

+    

+    /**

+     * Constructor for contribution ClassLoader 

+     * 

+     * @param contribution

+     * @param parent

+     * @throws MalformedURLException

+     */

+    public ContributionClassLoader(Contribution contribution, final ClassLoader parent) {

+        super(new URL[0], parent);

+        // Note that privileged use of getContextClassLoader have been promoted to callers.

+        // super(new URL[0], parent == null?Thread.currentThread().getContextClassLoader(): null);

+        this.contribution = contribution;

+        if (contribution.getLocation() != null) {

+            try {

+                this.addURL(new URL(contribution.getLocation()));

+                for (URL url : ContributionHelper.getNestedJarUrls(contribution)) {

+                    this.addURL(url);

+                }

+            } catch (IOException e) {

+                throw new RuntimeException(e);

+            }

+        }

+    }

+

+    /*

+     * Return the ClassLoader corresponding to a contribution providing an export

+     * Create a new ClassLoader for the contribution if one does not exist

+     */

+    private ClassLoader getExportClassLoader(Contribution exportingContribution) {

+    	ClassLoader cl = exportingContribution.getClassLoader();

+        if (!(cl instanceof ContributionClassLoader)) {

+            if (cl == null) {

+                cl = getParent();

+            }

+

+            cl = new ContributionClassLoader(exportingContribution, cl);

+            exportingContribution.setClassLoader(cl);

+        }

+        return cl;

+    }

+    

+    /* (non-Javadoc)

+     * @see java.net.URLClassLoader#findClass(java.lang.String)

+     * 

+     * Search path for class:

+     *     This contribution

+     *     Imported contributions

+     */

+    @Override   

+    protected Class<?> findClass(String className) throws ClassNotFoundException {

+        

+        Class<?> clazz = null;

+        try {

+            clazz = findClassFromContribution(className);

+        } catch (ClassNotFoundException e) {

+                

+            for (Import import_ : this.contribution.getImports()) {

+                if (classNameMatchesImport(className, import_)) {

+                    // Delegate the resolution to the imported contribution

+                    for (Contribution exportingContribution : ((JavaImportModelResolver)import_.getModelResolver()).getExportContributions()) {

+                                    

+                        ClassLoader exportClassLoader = getExportClassLoader(exportingContribution);

+                        if (exportClassLoader instanceof ContributionClassLoader) {

+                            

+                            for (Export export : exportingContribution.getExports()) {

+                                try {

+                                    if (import_.match(export)) {

+                                        clazz = ((ContributionClassLoader)exportClassLoader).findClassFromContribution(className);

+                                        break;

+                                    }

+                                } catch (ClassNotFoundException e1) { 

+                                    continue;

+                                }

+                                    

+                            }

+                            if (clazz != null)  break;

+                        }

+                    }

+                    if (clazz != null) break;

+                }

+            }

+

+            if (clazz == null) throw e;

+        }

+        return clazz;

+    }

+

+    

+    /* (non-Javadoc)

+     * @see java.lang.ClassLoader#loadClass(java.lang.String, boolean)

+     * 

+     * Search path for class:

+     *     Parent ClassLoader

+     *     This contribution

+     *     Imported contributions

+     *     

+     */

+    @Override

+    protected synchronized Class<?> loadClass(String className, boolean resolveClass) 

+        throws ClassNotFoundException {

+       

+        Class<?> clazz = null;

+        try {

+            

+            if (this.getParent() != null)

+                clazz = this.getParent().loadClass(className);

+            

+        } catch (ClassNotFoundException e) {

+        }

+

+        if (clazz == null)

+            clazz = findClass(className);

+

+

+        if (resolveClass)

+            this.resolveClass(clazz);

+        return clazz;

+        

+    }

+

+

+   

+    /*

+     * (non-Javadoc)

+     * 

+     * @see java.net.URLClassLoader#findResource(java.lang.String)

+     */

+    @Override

+    public URL findResource(String name) {

+        

+        URL url = findResourceFromContribution(name);

+        

+        if (url == null) {

+            for (Import import_ : this.contribution.getImports()) {

+                if (resourceNameMatchesImport(name, import_)) {

+                    // Delegate the resolution to the imported contribution

+                    for (Contribution exportingContribution : ((JavaImportModelResolver)import_.getModelResolver()).getExportContributions()) {

+                                

+                        ClassLoader exportClassLoader = getExportClassLoader(exportingContribution);

+                        if (exportClassLoader instanceof ContributionClassLoader) {

+

+                            for (Export export : exportingContribution.getExports()) {

+                                if (import_.match(export)) {

+                                    url = ((ContributionClassLoader)exportClassLoader).findResourceFromContribution(name);

+                                    if (url != null) break;

+                                }

+                            }

+                            if (url != null)  break;

+                        }

+                    }

+                    if (url != null) break;

+                }

+            }

+

+        }

+        return url;

+    }

+

+

+    /* (non-Javadoc)

+     * @see java.net.URLClassLoader#findResources(java.lang.String)

+     */

+    @Override

+    public Enumeration<URL> findResources(String name) throws IOException {

+              

+        return Collections.enumeration(findResourceSet(name));

+    }

+    

+    

+

+    

+    /* (non-Javadoc)

+     * @see java.lang.ClassLoader#getResource(java.lang.String)

+     * 

+     * Find a resource. 

+     * Search path for resource:

+     *     Parent ClassLoader

+     *     This contribution

+     *     Imported contributions

+     */

+    @Override

+    public URL getResource(String resName) {

+ 

+        URL resource  = null;

+        

+        if (this.getParent() != null) {

+            resource  = this.getParent().getResource(resName);

+        }        

+        if (resource == null)

+            resource  = findResource(resName);

+        

+        return resource;

+    }

+

+

+    

+    /* (non-Javadoc)

+     * @see java.lang.ClassLoader#getResources(java.lang.String)

+     * 

+     * Return list of resources from this contribution, resources

+     * imported through imported contributions and resources from parent 

+     * ClassLoader.

+     */

+    @Override

+    public Enumeration<URL> getResources(String resName) throws IOException {

+       

+        HashSet<URL> resourceSet = findResourceSet(resName);

+        addEnumerationToCollection(resourceSet, super.getResources(resName));

+        

+        return Collections.enumeration(resourceSet);

+    }

+    

+

+    /*

+     * Find set of resources

+     */

+    private HashSet<URL> findResourceSet(String name) throws IOException {

+        

+        HashSet<URL> resources = new HashSet<URL>();

+

+        addEnumerationToCollection(resources, super.findResources(name));

+        

+        for (Import import_ : this.contribution.getImports()) {

+            if (!(import_ instanceof JavaImport)) {

+                continue;

+            }

+            if (resourceNameMatchesImport(name, import_)) {

+                // Delegate the resolution to the imported contribution

+                for (Contribution exportingContribution : ((JavaImportModelResolver)import_.getModelResolver()).getExportContributions()) {

+                                

+                    ClassLoader exportClassLoader = getExportClassLoader(exportingContribution);

+                    if (exportClassLoader instanceof ContributionClassLoader) {

+

+                        for (Export export : exportingContribution.getExports()) {

+                            if (import_.match(export)) {

+                                addEnumerationToCollection(resources,

+                                        ((ContributionClassLoader)exportClassLoader).findResources(name));

+                            }

+                        }

+                    }

+                }

+            }

+         }

+

+        return resources;

+    }

+

+

+    /*

+     * Find class from contribution. If class has already been loaded, return loaded class.

+     */

+    private Class<?> findClassFromContribution(String className) throws ClassNotFoundException {

+        

+        Class<?> clazz = findLoadedClass(className);

+        if (clazz == null)

+            clazz =  super.findClass(className);

+        return clazz;

+       

+    }

+    

+    /*

+     * Find resource from contribution.

+     */

+    private URL findResourceFromContribution(String name) {

+        

+        return super.findResource(name);

+    }

+    

+    /**

+     * Check if a class name matches an import statement.

+     * Class matches if the package name used in <import.java/> matches

+     * 

+     * @param name    Name of class 

+     * @param import_ SCA contribution import

+     * @return true if this is a matching import

+     */

+    private boolean classNameMatchesImport(String name, Import import_) {

+        

+        if (import_ instanceof JavaImport && name != null && name.lastIndexOf('.') > 0) {

+            JavaImport javaImport = (JavaImport) import_;

+                

+            String packageName = name.substring(0, name.lastIndexOf('.'));

+            if (javaImport.getPackage().endsWith(".*")) {

+                String prefix = javaImport.getPackage().substring(0, javaImport.getPackage().length() -1);

+                 if (packageName.startsWith(prefix)) {

+                    return true;

+                }

+            } else {

+                return packageName.equals(javaImport.getPackage());

+            }

+        }

+        

+        return false;

+    }

+    

+    /**

+     * Check if a resource name matches an import statement.

+     * Resource matches if package/namespace match the directory of resource.

+     * 

+     * @param name    Name of resource

+     * @param import_ SCA contribution import

+     * @return true if this is a matching import

+     */

+    private boolean resourceNameMatchesImport(String name, Import import_) {

+        

+       

+        if (name == null || name.lastIndexOf('/') <= 0)

+            return false;

+        else if (import_ instanceof JavaImport) {

+            JavaImport javaImport = (JavaImport) import_;

+            

+            if (javaImport.getPackage().endsWith(".*")) {

+                String packageName = name.substring(0, name.lastIndexOf('/')).replace('/', '.');

+                String prefix = javaImport.getPackage().substring(0, javaImport.getPackage().length() -1);

+                if (packageName.startsWith(prefix)) {

+                    return true;

+                }

+            } else {

+                // 'name' is a resource : contains "/" as separators

+                // Get package name from resource name

+                String packageName = name.substring(0, name.lastIndexOf('/'));

+                 return packageName.equals(javaImport.getPackage().replaceAll("\\.", "/"));

+            }

+        } 

+        return false;

+    }

+    

+    /*

+     * Add an enumeration to a Collection

+     */

+    private <T extends Object> void addEnumerationToCollection(Collection<T> collection, Enumeration<T> enumeration) {

+        

+        while (enumeration.hasMoreElements())

+            collection.add(enumeration.nextElement());

+    }

+    

+    

+    @Override

+    public String toString() {

+        return "SCA Contribution ClassLoader location: " + contribution.getLocation() + " parent ClassLoader: " + getParent();

+    }

+    

+    

+}

diff --git a/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/ContributionHelper.java b/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/ContributionHelper.java
new file mode 100644
index 0000000000..e913495789
--- /dev/null
+++ b/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/ContributionHelper.java
@@ -0,0 +1,96 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.contribution.java.impl;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.net.URI;
+import java.net.URL;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipInputStream;
+
+import org.apache.tuscany.sca.contribution.Artifact;
+import org.apache.tuscany.sca.contribution.Contribution;
+
+public class ContributionHelper {
+
+    public static List<URL> getNestedJarUrls(final Contribution contribution) throws IOException {
+        List<URL> urls = new ArrayList<URL>();
+        boolean isZipContribution = contribution.getLocation().endsWith(".zip");
+        URI uri = URI.create(contribution.getLocation());
+        boolean isFolderContribution = !isZipContribution && uri.getScheme().equals("file") && new File(uri).isDirectory();
+        if (isZipContribution || isFolderContribution) {
+            for (Artifact a : contribution.getArtifacts()) {
+                if (a.getLocation().endsWith(".jar")) {
+                    if (isZipContribution) {
+                        urls.add(createTempJar(a, contribution));
+                    } else {
+                        urls.add(new URL(a.getLocation()));
+                    }
+                }
+            }
+        }
+        return urls;
+    }
+
+    /**
+     * URLClassLoader doesn't seem to work with URLs to jars within an archive so as a work around
+     * copy the jar to a temp file and use the url to that.
+     */
+    private static URL createTempJar(Artifact artifact, Contribution contribution) throws IOException {
+        FileOutputStream fileOutputStream = null;
+        ZipInputStream zipInputStream = new ZipInputStream(new FileInputStream(new File(URI.create(contribution.getLocation()))));
+        try {
+            ZipEntry zipEntry = zipInputStream.getNextEntry();
+            while (zipEntry != null) {
+                if (artifact.getLocation().endsWith(zipEntry.getName())) {
+
+                    String tempName = ("tmp." + artifact.getURI().substring(0, artifact.getURI().length() - 3)).replace('/', '.');
+                    File tempFile = File.createTempFile(tempName, ".jar");
+                    tempFile.deleteOnExit();
+                    fileOutputStream = new FileOutputStream(tempFile);
+
+                    byte[] buf = new byte[2048];
+                    int n;
+                    while ((n = zipInputStream.read(buf, 0, buf.length)) > -1) {
+                        fileOutputStream.write(buf, 0, n);
+                    }
+
+                    fileOutputStream.close();
+                    zipInputStream.closeEntry();
+
+                    return tempFile.toURI().toURL();
+
+                }
+                zipEntry = zipInputStream.getNextEntry();
+            }
+        } finally {
+            zipInputStream.close();
+            if (fileOutputStream != null) {
+                fileOutputStream.close();
+            }
+        }
+        
+        throw new IllegalStateException();
+    }
+}
diff --git a/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/JavaExportImpl.java b/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/JavaExportImpl.java
new file mode 100644
index 0000000000..c0bd9465e4
--- /dev/null
+++ b/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/JavaExportImpl.java
@@ -0,0 +1,59 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.tuscany.sca.contribution.java.impl;
+
+import org.apache.tuscany.sca.assembly.impl.ExtensibleImpl;
+import org.apache.tuscany.sca.contribution.java.JavaExport;
+import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
+
+/**
+ * Implementation of a Java Import model
+ *
+ * @version $Rev$ $Date$
+ */
+public class JavaExportImpl extends ExtensibleImpl implements JavaExport {
+    private ModelResolver modelResolver;
+
+    /**
+     * Java package being exported
+     */
+    private String packageName;
+
+    public JavaExportImpl() {
+        super();
+    }
+
+    public String getPackage() {
+        return this.packageName;
+    }
+
+    public void setPackage(String packageName) {
+        this.packageName = packageName;
+    }
+
+    public ModelResolver getModelResolver() {
+        return modelResolver;
+    }
+
+    public void setModelResolver(ModelResolver modelResolver) {
+        this.modelResolver = modelResolver;
+    }
+
+}
diff --git a/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/JavaExportModelResolver.java b/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/JavaExportModelResolver.java
new file mode 100644
index 0000000000..8d5412f6d7
--- /dev/null
+++ b/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/JavaExportModelResolver.java
@@ -0,0 +1,76 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.contribution.java.impl;
+
+import org.apache.tuscany.sca.contribution.java.JavaExport;
+import org.apache.tuscany.sca.contribution.resolver.ClassReference;
+import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
+
+/**
+ * A model resolver for Java exports.
+ *
+ * @version $Rev$ $Date$
+ */
+public class JavaExportModelResolver implements ModelResolver {
+
+    private JavaExport export;
+    private ModelResolver resolver;
+    
+    public JavaExportModelResolver(JavaExport export, ModelResolver resolver) {
+        this.export = export;
+        this.resolver = resolver;
+    }
+    
+    public void addModel(Object resolved) {
+        throw new IllegalStateException();
+    }
+
+    public Object removeModel(Object resolved) {
+        throw new IllegalStateException();
+    }
+
+    public <T> T resolveModel(Class<T> modelClass, T unresolved) {
+        if (!(unresolved instanceof ClassReference)) {
+            return unresolved;
+        }
+        
+        // Filter package name
+        ClassReference classReference = (ClassReference)unresolved;
+        String className = classReference.getClassName();
+        int d = className.lastIndexOf('.');
+        String packageName;
+        if (d != -1) {
+            packageName = className.substring(0, d);
+        } else {
+            packageName = "";
+        }
+        if (export.getPackage().equals(packageName)) {
+            
+            // Package matches the exported package, delegate to the
+            // contribution's resolver
+            return resolver.resolveModel(modelClass, unresolved);
+        } else {
+            
+            // Package is not exported, return the unresolved object 
+            return unresolved;
+        }
+    }
+
+}
diff --git a/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/JavaExportProcessor.java b/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/JavaExportProcessor.java
new file mode 100644
index 0000000000..d7c3817b68
--- /dev/null
+++ b/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/JavaExportProcessor.java
@@ -0,0 +1,163 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.contribution.java.impl;
+
+import static javax.xml.stream.XMLStreamConstants.START_ELEMENT;
+
+import javax.xml.namespace.QName;
+import javax.xml.stream.XMLStreamConstants;
+import javax.xml.stream.XMLStreamException;
+import javax.xml.stream.XMLStreamReader;
+import javax.xml.stream.XMLStreamWriter;
+
+import org.apache.tuscany.sca.assembly.builder.impl.ProblemImpl;
+import org.apache.tuscany.sca.contribution.ModelFactoryExtensionPoint;
+import org.apache.tuscany.sca.contribution.java.JavaExport;
+import org.apache.tuscany.sca.contribution.java.JavaImportExportFactory;
+import org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor;
+import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
+import org.apache.tuscany.sca.contribution.service.ContributionReadException;
+import org.apache.tuscany.sca.contribution.service.ContributionResolveException;
+import org.apache.tuscany.sca.contribution.service.ContributionWriteException;
+import org.apache.tuscany.sca.monitor.Monitor;
+import org.apache.tuscany.sca.monitor.Problem;
+import org.apache.tuscany.sca.monitor.Problem.Severity;
+
+/**
+ * Artifact processor for Java Export
+ * 
+ * @version $Rev$ $Date$
+ */
+public class JavaExportProcessor implements StAXArtifactProcessor<JavaExport> {
+    private static final String SCA10_NS = "http://www.osoa.org/xmlns/sca/1.0";
+    
+    private static final QName EXPORT_JAVA = new QName(SCA10_NS, "export.java");
+    
+    private static final String PACKAGE = "package";
+    
+    private final JavaImportExportFactory factory;
+    private final Monitor monitor;
+    
+    public JavaExportProcessor(ModelFactoryExtensionPoint modelFactories, Monitor monitor) {
+        super();
+        this.factory = modelFactories.getFactory(JavaImportExportFactory.class);
+        this.monitor = monitor;
+    }
+    
+    /**
+     * Report a error.
+     * 
+     * @param problems
+     * @param message
+     * @param model
+     */
+     private void error(String message, Object model, Object... messageParameters) {
+    	 if (monitor != null) {
+	        Problem problem = new ProblemImpl(this.getClass().getName(), "contribution-java-validation-messages", Severity.ERROR, model, message, (Object[])messageParameters);
+	        monitor.problem(problem);
+    	 }
+     }
+     
+     /**
+      * Report a exception.
+      * 
+      * @param problems
+      * @param message
+      * @param model
+      */
+     private void error(String message, Object model, Exception ex) {
+         if (monitor != null) {
+             Problem problem = new ProblemImpl(this.getClass().getName(), "contribution-java-validation-messages", Severity.ERROR, model, message, ex);
+             monitor.problem(problem);
+         }
+     }
+
+    public QName getArtifactType() {
+        return EXPORT_JAVA;
+    }
+    
+    public Class<JavaExport> getModelType() {
+        return JavaExport.class;
+    }
+    
+    /**
+     * Process <export package=""/>
+     */
+    public JavaExport read(XMLStreamReader reader) throws ContributionReadException {
+        JavaExport javaExport = this.factory.createJavaExport();
+        QName element = null;
+        
+        try {
+            while (reader.hasNext()) {
+                int event = reader.getEventType();
+                switch (event) {
+                    case START_ELEMENT:
+                        element = reader.getName();
+                        
+                        // Read <export.java>
+                        if (EXPORT_JAVA.equals(element)) {
+                            String packageName = reader.getAttributeValue(null, PACKAGE);
+                            if (packageName == null) {
+                            	error("AttributePackageMissing", reader);
+                                //throw new ContributionReadException("Attribute 'package' is missing");
+                            } else                        
+                                javaExport.setPackage(packageName);
+                        }
+                        break;
+                    case XMLStreamConstants.END_ELEMENT:
+                        if (EXPORT_JAVA.equals(reader.getName())) {
+                            return javaExport;
+                        }
+                        break;        
+                }
+                
+                //Read the next element
+                if (reader.hasNext()) {
+                    reader.next();
+                }
+            }
+        }
+        catch (XMLStreamException e) {
+            ContributionReadException ex = new ContributionReadException(e);
+            error("XMLStreamException", reader, ex);
+        }
+        
+        return javaExport;
+    }
+
+    public void write(JavaExport javaExport, XMLStreamWriter writer) throws ContributionWriteException, XMLStreamException {
+        
+        // Write <export.java>
+        writer.writeStartElement(EXPORT_JAVA.getNamespaceURI(), EXPORT_JAVA.getLocalPart());
+        
+        if (javaExport.getPackage() != null) {
+            writer.writeAttribute(PACKAGE, javaExport.getPackage());
+        }
+        
+        writer.writeEndElement();
+    }
+
+    public void resolve(JavaExport javaExport, ModelResolver resolver) throws ContributionResolveException {
+        
+        if (javaExport.getPackage() != null)
+            // Initialize the export resolver
+            javaExport.setModelResolver(new JavaExportModelResolver(javaExport, resolver));
+    }
+}
diff --git a/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/JavaImportExportFactoryImpl.java b/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/JavaImportExportFactoryImpl.java
new file mode 100644
index 0000000000..e5dc397f4e
--- /dev/null
+++ b/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/JavaImportExportFactoryImpl.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.contribution.java.impl;

+

+import org.apache.tuscany.sca.contribution.java.JavaExport;

+import org.apache.tuscany.sca.contribution.java.JavaImport;

+import org.apache.tuscany.sca.contribution.java.JavaImportExportFactory;

+

+/**

+ * Java Import/Export Factory implementation

+ * 

+ * @version $Rev$ $Date$

+ */

+public class JavaImportExportFactoryImpl implements JavaImportExportFactory {

+

+    public JavaImport createJavaImport() {

+        return new JavaImportImpl();

+    }

+    

+    public JavaExport createJavaExport() {

+        return new JavaExportImpl();

+    }

+

+}

diff --git a/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/JavaImportExportListener.java b/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/JavaImportExportListener.java
new file mode 100644
index 0000000000..47cdc9767b
--- /dev/null
+++ b/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/JavaImportExportListener.java
@@ -0,0 +1,157 @@
+/*

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

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

+ * distributed with this work for additional information

+ * regarding copyright ownership.  The ASF licenses this file

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

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

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

+ * 

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

+ * 

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

+ * software distributed under the License is distributed on an

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

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

+ * specific language governing permissions and limitations

+ * under the License.    

+ */

+

+package org.apache.tuscany.sca.contribution.java.impl;

+

+import java.util.ArrayList;

+import java.util.HashSet;

+import java.util.List;

+import java.util.Set;

+

+import org.apache.tuscany.sca.contribution.Artifact;

+import org.apache.tuscany.sca.contribution.Contribution;

+import org.apache.tuscany.sca.contribution.ContributionFactory;

+import org.apache.tuscany.sca.contribution.Export;

+import org.apache.tuscany.sca.contribution.Import;

+import org.apache.tuscany.sca.contribution.ModelFactoryExtensionPoint;

+import org.apache.tuscany.sca.contribution.java.JavaExport;

+import org.apache.tuscany.sca.contribution.java.JavaImport;

+import org.apache.tuscany.sca.contribution.resolver.DefaultImportAllModelResolver;

+import org.apache.tuscany.sca.contribution.resolver.ModelResolver;

+import org.apache.tuscany.sca.contribution.service.ContributionListener;

+import org.apache.tuscany.sca.contribution.service.ContributionRepository;

+

+/**

+ * Java Import/Export contribution listener

+ * The listener would process all import/export from a given contribution 

+ * and initialize the model resolvers properly

+ * 

+ * @version $Rev$ $Date$

+ */

+public class JavaImportExportListener implements ContributionListener {

+    

+    private ContributionFactory contributionFactory;

+    

+    /**

+     * Constructs a new JavaImportExportListener

+     */

+    public JavaImportExportListener(ModelFactoryExtensionPoint modelFactories) {

+        contributionFactory = modelFactories.getFactory(ContributionFactory.class);

+    }

+    

+    /**

+     * Initialize the import/export model resolvers

+     * Export model resolvers are same as Contribution model resolver

+     * Import model resolvers are matched to a specific contribution if a location URI is specified, 

+     *    otherwise it try to resolve against all the other contributions

+     * Also set the exporting contributions used by contribution ClassLoaders to 

+     * match import/export for class loading.

+     */

+    public void contributionAdded(ContributionRepository repository, Contribution contribution) {

+        

+        // If the contribution does not contain sca-contribution.xml metadata

+        // (for example it's an existing JAR developed before SCA existed)

+        // export all its Java packages

+        ModelResolver modelResolver = contribution.getModelResolver();

+        

+        // Look for META-INF/sca-contribution.xml

+        Artifact artifact = contributionFactory.createArtifact();

+        artifact.setURI(Contribution.SCA_CONTRIBUTION_META);

+        artifact = modelResolver.resolveModel(Artifact.class, artifact);

+        if (artifact.getLocation() == null) {

+

+            // Look for META-INF/sca-contribution-generated.xml

+            artifact.setURI(Contribution.SCA_CONTRIBUTION_GENERATED_META);

+            artifact = modelResolver.resolveModel(Artifact.class, artifact);

+            if (artifact.getLocation() == null) {

+                

+                // No contribution metadata file was found, default to export all the

+                // Java packages found in the contribution

+                Set<String> packages = new HashSet<String>();

+                for (Artifact a: contribution.getArtifacts()) {

+                    String uri = a.getURI();

+                    if (uri.endsWith(".class")) {

+                        uri = uri.substring(0, uri.length() - 6);

+                        int d = uri.lastIndexOf('/');

+                        if (d != -1) {

+                            packages.add(uri.substring(0, d).replace('/', '.'));

+                        }

+                    }

+                }

+                

+                // Add Java export model objects for all the packages we found

+                for (String pkg: packages) {

+                    JavaExport export = new JavaExportImpl();

+                    export.setPackage(pkg);

+                    contribution.getExports().add(export);

+                }

+            }

+        }

+        

+        // Initialize the contribution exports

+        for (Export export: contribution.getExports()) {

+            export.setModelResolver(contribution.getModelResolver());

+        }

+        

+        // Initialize the contribution imports

+        for (Import import_: contribution.getImports()) {

+            boolean initialized = false;

+            

+            if(import_ instanceof JavaImport) {

+                JavaImport javaImport = (JavaImport) import_;

+                

+                //Find a matching contribution

+                if(javaImport.getLocation() != null) {

+                    Contribution targetContribution = repository.getContribution(javaImport.getLocation());

+                    if (targetContribution != null) {

+                    

+                        // Find a matching contribution export

+                        for (Export export: targetContribution.getExports()) {

+                            if (export instanceof JavaExport) {

+                                JavaExport javaExport = (JavaExport)export;

+                                if (javaImport.getPackage().equals(javaExport.getPackage())) {

+                                    List<Contribution> exportingContributions = new ArrayList<Contribution>();

+                                    exportingContributions.add(targetContribution);

+                                    javaImport.setModelResolver(new JavaImportModelResolver(exportingContributions, javaExport.getModelResolver()));

+                                    initialized = true;

+                                    break;

+                                }

+                            }

+                        }

+                    }                    

+                }

+

+                //if no location was specified, try to resolve with any contribution

+                if (!initialized) {

+                    //Use a resolver that will consider all contributions

+                    import_.setModelResolver(new JavaImportModelResolver(repository.getContributions(), new DefaultImportAllModelResolver(import_, repository.getContributions())));

+                }

+            }

+        }

+    }

+

+    public void contributionRemoved(ContributionRepository repository, Contribution contribution) {

+

+    }

+

+    public void contributionUpdated(ContributionRepository repository, Contribution oldContribution, Contribution contribution) {

+

+    }

+

+}

diff --git a/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/JavaImportImpl.java b/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/JavaImportImpl.java
new file mode 100644
index 0000000000..f2fdb3278e
--- /dev/null
+++ b/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/JavaImportImpl.java
@@ -0,0 +1,111 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.tuscany.sca.contribution.java.impl;
+
+import java.util.List;
+
+import org.apache.tuscany.sca.assembly.impl.ExtensibleImpl;
+import org.apache.tuscany.sca.contribution.Contribution;
+import org.apache.tuscany.sca.contribution.Export;
+import org.apache.tuscany.sca.contribution.java.JavaExport;
+import org.apache.tuscany.sca.contribution.java.JavaImport;
+import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
+
+/**
+ * Implementation of a Java Import model
+ *
+ * @version $Rev$ $Date$
+ */
+public class JavaImportImpl extends ExtensibleImpl implements JavaImport {
+    private ModelResolver modelResolver;
+    private List<Contribution> contributions;
+    /**
+     * Java package name being imported
+     */
+    private String packageName;
+    /**
+     * Contribution URI where the artifact is imported from
+     */
+    private String location;
+
+    public JavaImportImpl() {
+        super();
+    }
+
+    public String getLocation() {
+        return this.location;
+    }
+
+    public void setLocation(String location) {
+        this.location = location;
+    }
+
+    public String getPackage() {
+        return this.packageName;
+    }
+
+    public void setPackage(String packageName) {
+        this.packageName = packageName;
+    }
+
+    public ModelResolver getModelResolver() {
+        return this.modelResolver;
+    }
+
+    public void setModelResolver(ModelResolver modelResolver) {
+        this.modelResolver = modelResolver;
+    }
+    public List<Contribution> getExportContributions() {
+        return contributions;
+    }
+
+    public void setExportContributions(List<Contribution> contributions) {
+        this.contributions = contributions;
+    }
+
+    /**
+     * Match a JavaImport to a given JavaExport based on :
+     *    location is not provided
+     *    import and export packages match
+     */
+    public boolean match(Export export) {
+        if(export instanceof JavaExport) {
+            JavaExport javaExport = (JavaExport)export;
+            String exportedPackage = javaExport.getPackage();
+            if (packageName.equals(exportedPackage)) {
+                return true;
+            } else {
+                if (packageName.endsWith(".*")) {
+                    String prefix = packageName.substring(0, packageName.length() - 1);
+                    if (exportedPackage.startsWith(prefix)) {
+                        return true;
+                    }
+                }
+            }
+        }
+
+        return false;
+    }
+
+    @Override
+    public String toString() {
+        return String.valueOf(packageName);
+    }
+}
diff --git a/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/JavaImportModelResolver.java b/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/JavaImportModelResolver.java
new file mode 100644
index 0000000000..484eddd222
--- /dev/null
+++ b/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/JavaImportModelResolver.java
@@ -0,0 +1,62 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.contribution.java.impl;
+
+import java.util.List;
+
+import org.apache.tuscany.sca.contribution.Contribution;
+import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
+
+/**
+ * A JavaImport specific model resolver. This model resolver is temporary
+ * and provides the ContributionClassLoader with the list of exporting
+ * contributions that it currently needs.
+ * 
+ * FIXME Remove this class after the ContributionClassLoader is simplified
+ * and cleaned up.
+ *
+ * @version $Rev$ $Date$
+ */
+public class JavaImportModelResolver implements ModelResolver {
+
+    private ModelResolver modelResolver;
+    private List<Contribution> contributions;
+    
+    public JavaImportModelResolver(List<Contribution> contributions, ModelResolver modelResolver) {
+        this.modelResolver = modelResolver;
+        this.contributions = contributions;
+    }
+
+    public List<Contribution> getExportContributions() {
+        return contributions;
+    }
+    
+    public void addModel(Object resolved) {
+        modelResolver.addModel(resolved);
+    }
+
+    public Object removeModel(Object resolved) {
+        return modelResolver.removeModel(resolved);
+    }
+
+    public <T> T resolveModel(Class<T> modelClass, T unresolved) {
+        return modelResolver.resolveModel(modelClass, unresolved);
+    }
+}
diff --git a/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/JavaImportProcessor.java b/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/JavaImportProcessor.java
new file mode 100644
index 0000000000..7812c25c1c
--- /dev/null
+++ b/branches/sca-java-1.5.1/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/JavaImportProcessor.java
@@ -0,0 +1,168 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.contribution.java.impl;
+
+import static javax.xml.stream.XMLStreamConstants.START_ELEMENT;
+
+import javax.xml.namespace.QName;
+import javax.xml.stream.XMLStreamConstants;
+import javax.xml.stream.XMLStreamException;
+import javax.xml.stream.XMLStreamReader;
+import javax.xml.stream.XMLStreamWriter;
+
+import org.apache.tuscany.sca.assembly.builder.impl.ProblemImpl;
+import org.apache.tuscany.sca.contribution.ModelFactoryExtensionPoint;
+import org.apache.tuscany.sca.contribution.java.JavaImport;
+import org.apache.tuscany.sca.contribution.java.JavaImportExportFactory;
+import org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor;
+import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
+import org.apache.tuscany.sca.contribution.service.ContributionReadException;
+import org.apache.tuscany.sca.contribution.service.ContributionResolveException;
+import org.apache.tuscany.sca.contribution.service.ContributionWriteException;
+import org.apache.tuscany.sca.monitor.Monitor;
+import org.apache.tuscany.sca.monitor.Problem;
+import org.apache.tuscany.sca.monitor.Problem.Severity;
+
+/**
+ * Artifact Processor for Java Imports
+ * 
+ * @version $Rev$ $Date$
+ */
+public class JavaImportProcessor  implements StAXArtifactProcessor<JavaImport> {
+    private static final String SCA10_NS = "http://www.osoa.org/xmlns/sca/1.0";
+    
+    private static final QName IMPORT_JAVA = new QName(SCA10_NS, "import.java");
+
+    private static final String PACKAGE = "package";
+    private static final String LOCATION = "location";
+    
+    private final JavaImportExportFactory factory;
+    private final Monitor monitor;
+    
+    public JavaImportProcessor(ModelFactoryExtensionPoint modelFactories, Monitor monitor) {
+        super();
+        this.factory = modelFactories.getFactory(JavaImportExportFactory.class);
+        this.monitor = monitor;
+    }
+    
+    /**
+     * Report a error.
+     * 
+     * @param problems
+     * @param message
+     * @param model
+     */
+     private void error(String message, Object model, Object... messageParameters) {
+    	 if (monitor != null) {
+	        Problem problem = new ProblemImpl(this.getClass().getName(), "contribution-java-validation-messages", Severity.ERROR, model, message, (Object[])messageParameters);
+	        monitor.problem(problem);
+    	 }
+     }
+     
+     /**
+      * Report a exception.
+      * 
+      * @param problems
+      * @param message
+      * @param model
+      */
+     private void error(String message, Object model, Exception ex) {
+         if (monitor != null) {
+             Problem problem = new ProblemImpl(this.getClass().getName(), "contribution-java-validation-messages", Severity.ERROR, model, message, ex);
+             monitor.problem(problem);
+         }
+     }
+    
+    public QName getArtifactType() {
+        return IMPORT_JAVA;
+    }
+    
+    public Class<JavaImport> getModelType() {
+        return JavaImport.class;
+    }
+
+    /**
+     * Process <import.java package="" location=""/>
+     */
+    public JavaImport read(XMLStreamReader reader) throws ContributionReadException {
+        JavaImport javaImport = this.factory.createJavaImport();
+        QName element = null;
+        
+        try {
+            while (reader.hasNext()) {
+                int event = reader.getEventType();
+                switch (event) {
+                    case START_ELEMENT:
+                        element = reader.getName();
+    
+                        // Read <import.java>
+                        if (IMPORT_JAVA.equals(element)) {
+                            String packageName = reader.getAttributeValue(null, PACKAGE);
+                            if (packageName == null) {
+                            	error("AttributePackageMissing", reader);
+                                //throw new ContributionReadException("Attribute 'package' is missing");
+                            } else
+                            	javaImport.setPackage(packageName);
+                            
+                            String location = reader.getAttributeValue(null, LOCATION);                        
+                            javaImport.setLocation(location);
+                        }
+                        break;
+                    case XMLStreamConstants.END_ELEMENT:
+                        if (IMPORT_JAVA.equals(reader.getName())) {
+                            return javaImport;
+                        }
+                        break;        
+                }
+                
+                // Read the next element
+                if (reader.hasNext()) {
+                    reader.next();
+                }
+            }
+        }
+        catch (XMLStreamException e) {
+            ContributionReadException ex = new ContributionReadException(e);
+            error("XMLStreamException", reader, ex);
+        }
+        
+        return javaImport;
+    }
+
+    public void write(JavaImport javaImport, XMLStreamWriter writer) throws ContributionWriteException, XMLStreamException {
+        
+        // Write <import.java>
+        writer.writeStartElement(IMPORT_JAVA.getNamespaceURI(), IMPORT_JAVA.getLocalPart());
+        
+        if (javaImport.getPackage() != null) {
+            writer.writeAttribute(PACKAGE, javaImport.getPackage());
+        }
+        if (javaImport.getLocation() != null) {
+            writer.writeAttribute(LOCATION, javaImport.getLocation());
+        }
+        
+        writer.writeEndElement();
+    }
+
+
+    public void resolve(JavaImport model, ModelResolver resolver) throws ContributionResolveException {
+        
+    }
+}