Copy sca trunk to sandbox area so i can get the release plugin configuration correct without messing up the live trunk

git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@755209 13f79535-47bb-0310-9956-ffa450edef68

18 files changed, 1599 insertions, 0 deletions

diff --git a/sandbox/ant/sca/trunk/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/DefaultJavaImportExportFactory.java b/sandbox/ant/sca/trunk/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/DefaultJavaImportExportFactory.java
new file mode 100644
index 0000000000..886c61c00a
--- /dev/null
+++ b/sandbox/ant/sca/trunk/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/sandbox/ant/sca/trunk/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/JavaExport.java b/sandbox/ant/sca/trunk/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/JavaExport.java
new file mode 100644
index 0000000000..41e93ec148
--- /dev/null
+++ b/sandbox/ant/sca/trunk/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/sandbox/ant/sca/trunk/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/JavaImport.java b/sandbox/ant/sca/trunk/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/JavaImport.java
new file mode 100644
index 0000000000..d3568f6283
--- /dev/null
+++ b/sandbox/ant/sca/trunk/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/sandbox/ant/sca/trunk/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/JavaImportExportFactory.java b/sandbox/ant/sca/trunk/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/JavaImportExportFactory.java
new file mode 100644
index 0000000000..af2ca9cd57
--- /dev/null
+++ b/sandbox/ant/sca/trunk/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/sandbox/ant/sca/trunk/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/ClassLoaderModelResolver.java b/sandbox/ant/sca/trunk/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/ClassLoaderModelResolver.java
new file mode 100644
index 0000000000..135b3fbb69
--- /dev/null
+++ b/sandbox/ant/sca/trunk/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/ClassLoaderModelResolver.java
@@ -0,0 +1,159 @@
+/*
+ * 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.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.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.core.FactoryExtensionPoint;
+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;
+    }
+    
+    public ClassLoaderModelResolver(final Contribution contribution, FactoryExtensionPoint modelFactories) throws MalformedURLException {
+        super(new URL[] {new URL(contribution.getLocation())}, 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/sandbox/ant/sca/trunk/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/ClassReferenceModelResolver.java b/sandbox/ant/sca/trunk/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/ClassReferenceModelResolver.java
new file mode 100644
index 0000000000..11e13ced11
--- /dev/null
+++ b/sandbox/ant/sca/trunk/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/ClassReferenceModelResolver.java
@@ -0,0 +1,159 @@
+/*

+ * 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.resolver.ClassReference;

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

+import org.apache.tuscany.sca.core.FactoryExtensionPoint;

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

+

+/**

+ * A Model Resolver for ClassReferences.

+ * @deprecated Use ClassLoaderModelResolver instead

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

+ */

+@Deprecated()

+public class ClassReferenceModelResolver implements ModelResolver {

+    private Contribution contribution;

+    private WeakReference<ClassLoader> classLoader;

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

+

+    private ModelResolver osgiResolver;

+

+    public ClassReferenceModelResolver(final Contribution contribution, FactoryExtensionPoint modelFactories) {

+        this.contribution = contribution;

+        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();

+                cl = new ContributionClassLoader(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, FactoryExtensionPoint.class);

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

+            }

+        } 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/sandbox/ant/sca/trunk/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/ContributionClassLoader.java b/sandbox/ant/sca/trunk/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/ContributionClassLoader.java
new file mode 100644
index 0000000000..008bfec31a
--- /dev/null
+++ b/sandbox/ant/sca/trunk/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/ContributionClassLoader.java
@@ -0,0 +1,383 @@
+/*

+ * 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.util.Collection;

+import java.util.Collections;

+import java.util.Enumeration;

+import java.util.HashSet;

+

+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()));

+            } catch (MalformedURLException 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/sandbox/ant/sca/trunk/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/JavaExportImpl.java b/sandbox/ant/sca/trunk/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/JavaExportImpl.java
new file mode 100644
index 0000000000..f35f35ac4c
--- /dev/null
+++ b/sandbox/ant/sca/trunk/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/JavaExportImpl.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.impl;
+
+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 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/sandbox/ant/sca/trunk/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/JavaExportModelResolver.java b/sandbox/ant/sca/trunk/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/sandbox/ant/sca/trunk/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/sandbox/ant/sca/trunk/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/JavaExportProcessor.java b/sandbox/ant/sca/trunk/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/JavaExportProcessor.java
new file mode 100644
index 0000000000..6decc004a6
--- /dev/null
+++ b/sandbox/ant/sca/trunk/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/JavaExportProcessor.java
@@ -0,0 +1,148 @@
+/*
+ * 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.contribution.java.JavaExport;
+import org.apache.tuscany.sca.contribution.java.JavaImportExportFactory;
+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.StAXArtifactProcessor;
+import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
+import org.apache.tuscany.sca.core.FactoryExtensionPoint;
+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 SCA11_NS = "http://docs.oasis-open.org/ns/opencsa/sca/200903";
+    
+    private static final QName EXPORT_JAVA = new QName(SCA11_NS, "export.java");
+    
+    private static final String PACKAGE = "package";
+    
+    private final JavaImportExportFactory factory;
+    private final Monitor monitor;
+    
+    public JavaExportProcessor(FactoryExtensionPoint 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 = monitor.createProblem(this.getClass().getName(), "contribution-java-validation-messages", Severity.ERROR, model, message, (Object[])messageParameters);
+	        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/sandbox/ant/sca/trunk/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/JavaImportExportFactoryImpl.java b/sandbox/ant/sca/trunk/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/sandbox/ant/sca/trunk/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/sandbox/ant/sca/trunk/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/JavaImportImpl.java b/sandbox/ant/sca/trunk/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/JavaImportImpl.java
new file mode 100644
index 0000000000..cc18d5f798
--- /dev/null
+++ b/sandbox/ant/sca/trunk/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/JavaImportImpl.java
@@ -0,0 +1,110 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.contribution.java.impl;
+
+import java.util.List;
+
+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 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/sandbox/ant/sca/trunk/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/JavaImportModelResolver.java b/sandbox/ant/sca/trunk/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/sandbox/ant/sca/trunk/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/sandbox/ant/sca/trunk/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/JavaImportProcessor.java b/sandbox/ant/sca/trunk/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/JavaImportProcessor.java
new file mode 100644
index 0000000000..48a1698bf4
--- /dev/null
+++ b/sandbox/ant/sca/trunk/modules/contribution-java/src/main/java/org/apache/tuscany/sca/contribution/java/impl/JavaImportProcessor.java
@@ -0,0 +1,153 @@
+/*
+ * 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.contribution.java.JavaImport;
+import org.apache.tuscany.sca.contribution.java.JavaImportExportFactory;
+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.StAXArtifactProcessor;
+import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
+import org.apache.tuscany.sca.core.FactoryExtensionPoint;
+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 SCA11_NS = "http://docs.oasis-open.org/ns/opencsa/sca/200903";
+    
+    private static final QName IMPORT_JAVA = new QName(SCA11_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(FactoryExtensionPoint 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 = monitor.createProblem(this.getClass().getName(), "contribution-java-validation-messages", Severity.ERROR, model, message, (Object[])messageParameters);
+	        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 {
+        
+    }
+}
diff --git a/sandbox/ant/sca/trunk/modules/contribution-java/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.java.JavaImportExportFactory b/sandbox/ant/sca/trunk/modules/contribution-java/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.java.JavaImportExportFactory
new file mode 100644
index 0000000000..a293330a57
--- /dev/null
+++ b/sandbox/ant/sca/trunk/modules/contribution-java/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.java.JavaImportExportFactory
@@ -0,0 +1,18 @@
+# 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. 

+

+org.apache.tuscany.sca.contribution.java.impl.JavaImportExportFactoryImpl

diff --git a/sandbox/ant/sca/trunk/modules/contribution-java/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor b/sandbox/ant/sca/trunk/modules/contribution-java/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor
new file mode 100644
index 0000000000..5f7bff394b
--- /dev/null
+++ b/sandbox/ant/sca/trunk/modules/contribution-java/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor
@@ -0,0 +1,19 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+# 
+#   http://www.apache.org/licenses/LICENSE-2.0
+# 
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License. 
+
+org.apache.tuscany.sca.contribution.java.impl.JavaImportProcessor;qname=http://docs.oasis-open.org/ns/opencsa/sca/200903#import.java,model=org.apache.tuscany.sca.contribution.java.JavaImport
+org.apache.tuscany.sca.contribution.java.impl.JavaExportProcessor;qname=http://docs.oasis-open.org/ns/opencsa/sca/200903#export.java,model=org.apache.tuscany.sca.contribution.java.JavaExport
diff --git a/sandbox/ant/sca/trunk/modules/contribution-java/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.resolver.ModelResolver b/sandbox/ant/sca/trunk/modules/contribution-java/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.resolver.ModelResolver
new file mode 100644
index 0000000000..6bab6fa3c6
--- /dev/null
+++ b/sandbox/ant/sca/trunk/modules/contribution-java/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.resolver.ModelResolver
@@ -0,0 +1,17 @@
+# 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. 

+org.apache.tuscany.sca.contribution.java.impl.ClassLoaderModelResolver;model=org.apache.tuscany.sca.contribution.resolver.ClassReference

diff --git a/sandbox/ant/sca/trunk/modules/contribution-java/src/main/resources/contribution-java-validation-messages.properties b/sandbox/ant/sca/trunk/modules/contribution-java/src/main/resources/contribution-java-validation-messages.properties
new file mode 100644
index 0000000000..09fc3e9fff
--- /dev/null
+++ b/sandbox/ant/sca/trunk/modules/contribution-java/src/main/resources/contribution-java-validation-messages.properties
@@ -0,0 +1,23 @@
+#
+#
+#    Licensed to the Apache Software Foundation (ASF) under one
+#    or more contributor license agreements. See the NOTICE file
+#    distributed with this work for additional information
+#    regarding copyright ownership. The ASF licenses this file
+#    to you under the Apache License, Version 2.0 (the
+#    "License"); you may not use this file except in compliance
+#    with the License. You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing,
+#    software distributed under the License is distributed on an
+#    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+#    KIND, either express or implied. See the License for the
+#    specific language governing permissions and limitations
+#    under the License.
+#
+#
+AttributePackageMissing = Attribute 'package' is missing
+XMLStreamException = XMLStreamException occured due to : {0}
+