Move Tuscany from Incubator to top level.

git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@668359 13f79535-47bb-0310-9956-ffa450edef68

9 files changed, 690 insertions, 0 deletions

diff --git a/java/sca/modules/contribution-xml/src/main/java/org/apache/tuscany/sca/contribution/xml/ContributionGeneratedMetadataDocumentProcessor.java b/java/sca/modules/contribution-xml/src/main/java/org/apache/tuscany/sca/contribution/xml/ContributionGeneratedMetadataDocumentProcessor.java
new file mode 100644
index 0000000000..256d50c191
--- /dev/null
+++ b/java/sca/modules/contribution-xml/src/main/java/org/apache/tuscany/sca/contribution/xml/ContributionGeneratedMetadataDocumentProcessor.java
@@ -0,0 +1,49 @@
+/*
+ * 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.xml;
+
+import javax.xml.stream.XMLInputFactory;
+
+import org.apache.tuscany.sca.contribution.ModelFactoryExtensionPoint;
+import org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor;
+import org.apache.tuscany.sca.monitor.Monitor;
+
+/**
+ * URLArtifactProcessor that handles sca-contribution-generated.xml files.
+ * 
+ * @version $Rev$ $Date$
+ */
+public class ContributionGeneratedMetadataDocumentProcessor extends ContributionMetadataDocumentProcessor {
+
+    public ContributionGeneratedMetadataDocumentProcessor(XMLInputFactory inputFactory, 
+    													  StAXArtifactProcessor staxProcessor,
+    													  Monitor monitor) {
+        super(inputFactory, staxProcessor, monitor);
+    }
+    
+    public ContributionGeneratedMetadataDocumentProcessor(ModelFactoryExtensionPoint modelFactories, 
+    													  StAXArtifactProcessor staxProcessor,
+    													  Monitor monitor) {
+        super(modelFactories, staxProcessor, monitor);
+    }
+    
+    public String getArtifactType() {
+        return "sca-contribution-generated.xml";
+    }
+}
diff --git a/java/sca/modules/contribution-xml/src/main/java/org/apache/tuscany/sca/contribution/xml/ContributionMetadataDocumentProcessor.java b/java/sca/modules/contribution-xml/src/main/java/org/apache/tuscany/sca/contribution/xml/ContributionMetadataDocumentProcessor.java
new file mode 100644
index 0000000000..e2e97239e0
--- /dev/null
+++ b/java/sca/modules/contribution-xml/src/main/java/org/apache/tuscany/sca/contribution/xml/ContributionMetadataDocumentProcessor.java
@@ -0,0 +1,131 @@
+/*
+ * 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.xml;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URI;
+import java.net.URL;
+import java.net.URLConnection;
+
+import javax.xml.stream.XMLInputFactory;
+import javax.xml.stream.XMLStreamException;
+import javax.xml.stream.XMLStreamReader;
+
+import org.apache.tuscany.sca.assembly.builder.impl.ProblemImpl;
+import org.apache.tuscany.sca.contribution.ContributionMetadata;
+import org.apache.tuscany.sca.contribution.ModelFactoryExtensionPoint;
+import org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor;
+import org.apache.tuscany.sca.contribution.processor.URLArtifactProcessor;
+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.monitor.Monitor;
+import org.apache.tuscany.sca.monitor.Problem;
+import org.apache.tuscany.sca.monitor.Problem.Severity;
+
+/**
+ * URLArtifactProcessor that handles sca-contribution.xml files.
+ * 
+ * @version $Rev$ $Date$
+ */
+public class ContributionMetadataDocumentProcessor implements URLArtifactProcessor<ContributionMetadata>{
+    private final StAXArtifactProcessor staxProcessor;
+    private final XMLInputFactory inputFactory;
+    private final Monitor monitor;
+
+    public ContributionMetadataDocumentProcessor(XMLInputFactory inputFactory, 
+    											 StAXArtifactProcessor staxProcessor,
+    											 Monitor monitor) {
+        this.inputFactory = inputFactory;
+        this.staxProcessor = staxProcessor;
+        this.monitor = monitor;
+    }
+    
+    public ContributionMetadataDocumentProcessor(ModelFactoryExtensionPoint modelFactories, 
+    											 StAXArtifactProcessor staxProcessor,
+    											 Monitor monitor) {
+        this.inputFactory = modelFactories.getFactory(XMLInputFactory.class);
+        this.staxProcessor = staxProcessor;
+        this.monitor = monitor;
+    }
+    
+    /**
+     * Report a exception.
+     * 
+     * @param problems
+     * @param message
+     * @param model
+     */
+    private void error(String message, Object model, Exception ex) {
+    	if (monitor != null) {
+	        Problem problem = new ProblemImpl(this.getClass().getName(), "contribution-xml-validation-messages", Severity.ERROR, model, message, ex);
+	        monitor.problem(problem);
+    	}
+    }
+    
+    public String getArtifactType() {
+        return "sca-contribution.xml";
+    }
+    
+    public Class<ContributionMetadata> getModelType() {
+        return ContributionMetadata.class;
+    }
+    
+    public ContributionMetadata read(URL contributionURL, URI uri, URL url) throws ContributionReadException {
+        InputStream urlStream = null;
+        try {
+            
+            // Create a stream reader
+            URLConnection connection = url.openConnection();
+            connection.setUseCaches(false);
+            urlStream = connection.getInputStream();
+            XMLStreamReader reader = inputFactory.createXMLStreamReader(url.toString(), urlStream);
+            reader.nextTag();
+            
+            // Read the contribution model
+            ContributionMetadata contribution = (ContributionMetadata)staxProcessor.read(reader);
+
+            return contribution;
+            
+        } catch (XMLStreamException e) {
+        	ContributionReadException ex = new ContributionReadException(e);
+        	error("XMLStreamException", inputFactory, ex);
+        	throw ex;
+        } catch (IOException e) {
+        	ContributionReadException ex = new ContributionReadException(e);
+        	error("IOException", inputFactory, ex);
+            throw ex;
+        } finally {
+            try {
+                if (urlStream != null) {
+                    urlStream.close();
+                    urlStream = null;
+                }
+            } catch (IOException ioe) {
+                //ignore
+            }
+        }
+    }
+    
+    public void resolve(ContributionMetadata contribution, ModelResolver resolver) throws ContributionResolveException {
+        staxProcessor.resolve(contribution, resolver);
+    }
+
+}
diff --git a/java/sca/modules/contribution-xml/src/main/java/org/apache/tuscany/sca/contribution/xml/ContributionMetadataProcessor.java b/java/sca/modules/contribution-xml/src/main/java/org/apache/tuscany/sca/contribution/xml/ContributionMetadataProcessor.java
new file mode 100644
index 0000000000..3f5aacb541
--- /dev/null
+++ b/java/sca/modules/contribution-xml/src/main/java/org/apache/tuscany/sca/contribution/xml/ContributionMetadataProcessor.java
@@ -0,0 +1,217 @@
+/*
+ * 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.xml;
+
+import static javax.xml.stream.XMLStreamConstants.START_ELEMENT;
+
+import java.util.List;
+
+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.AssemblyFactory;
+import org.apache.tuscany.sca.assembly.Composite;
+import org.apache.tuscany.sca.assembly.builder.impl.ProblemImpl;
+import org.apache.tuscany.sca.contribution.ContributionFactory;
+import org.apache.tuscany.sca.contribution.ContributionMetadata;
+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.processor.BaseStAXArtifactProcessor;
+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;
+
+/**
+ * Processor for contribution metadata
+ * 
+ * @version $Rev$ $Date$
+ */
+public class ContributionMetadataProcessor extends BaseStAXArtifactProcessor implements StAXArtifactProcessor<ContributionMetadata> {
+    
+    private static final String SCA10_NS = "http://www.osoa.org/xmlns/sca/1.0";
+    
+    private static final QName CONTRIBUTION_QNAME = new QName(SCA10_NS, "contribution");
+    private static final QName DEPLOYABLE_QNAME = new QName(SCA10_NS, "deployable");
+    
+    private final AssemblyFactory assemblyFactory;
+    private final ContributionFactory contributionFactory;
+    
+    private final StAXArtifactProcessor<Object> extensionProcessor;
+    private Monitor monitor;
+
+    public ContributionMetadataProcessor(AssemblyFactory assemblyFactory, 
+    									 ContributionFactory contributionFactory, 
+    									 StAXArtifactProcessor<Object> extensionProcessor,
+    									 Monitor monitor) {
+        this.assemblyFactory = assemblyFactory;
+        this.contributionFactory = contributionFactory;
+        this.extensionProcessor = extensionProcessor;
+        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-xml-validation-messages", Severity.ERROR, model, message, (Object[])messageParameters);
+	        monitor.problem(problem);
+    	 }
+     }
+     
+    public ContributionMetadataProcessor(ModelFactoryExtensionPoint modelFactories, 
+    									 StAXArtifactProcessor<Object> extensionProcessor,
+    									 Monitor monitor) {
+        this.assemblyFactory = modelFactories.getFactory(AssemblyFactory.class);
+        this.contributionFactory = modelFactories.getFactory(ContributionFactory.class);
+        this.extensionProcessor = extensionProcessor;
+        this.monitor = monitor;
+    }
+    
+    
+    public QName getArtifactType() {
+        return CONTRIBUTION_QNAME;
+    }
+
+    public Class<ContributionMetadata> getModelType() {
+        return ContributionMetadata.class;
+    }
+
+    public ContributionMetadata read(XMLStreamReader reader) throws ContributionReadException, XMLStreamException {
+        ContributionMetadata contribution = null;
+        QName name = null;
+        
+        while (reader.hasNext()) {
+            int event = reader.getEventType();
+            switch (event) {
+                case START_ELEMENT:
+                    name = reader.getName();
+                    
+                    if (CONTRIBUTION_QNAME.equals(name)) {
+
+                        // Read <contribution>
+                        contribution = this.contributionFactory.createContributionMetadata();
+                        contribution.setUnresolved(true);
+                        
+                    } else if (DEPLOYABLE_QNAME.equals(name)) {                        
+                        
+                        // Read <deployable>
+                        QName compositeName = getQName(reader, "composite");
+                        if (compositeName == null) {
+                        	error("AttributeCompositeMissing", reader);
+                            //throw new ContributionReadException("Attribute 'composite' is missing");
+                        } else {
+                            if (contribution != null) {
+                                Composite composite = assemblyFactory.createComposite();
+                                composite.setName(compositeName);
+                                composite.setUnresolved(true);
+                                contribution.getDeployables().add(composite);                         
+                            }
+                        }
+                    } else {
+
+                        // Read an extension element
+                        Object extension = extensionProcessor.read(reader);
+                        if (extension != null && contribution != null) {
+                            if (extension instanceof Import) {
+                                contribution.getImports().add((Import)extension);
+                            } else if (extension instanceof Export) {
+                                contribution.getExports().add((Export)extension);
+                            }
+                        }
+                    }
+                    break;
+                    
+                case XMLStreamConstants.END_ELEMENT:
+                    if (CONTRIBUTION_QNAME.equals(reader.getName())) {
+                        return contribution;
+                    }
+                    break;        
+            }
+            
+            //Read the next element
+            if (reader.hasNext()) {
+                reader.next();
+            }
+        }
+        
+        return contribution;
+    }
+
+    public void write(ContributionMetadata contribution, XMLStreamWriter writer) throws ContributionWriteException, XMLStreamException {
+        
+        // Write <contribution>
+        writeStartDocument(writer, CONTRIBUTION_QNAME.getNamespaceURI(), CONTRIBUTION_QNAME.getLocalPart());
+
+        // Write <import>
+        for (Import imp: contribution.getImports()) {
+            extensionProcessor.write(imp, writer);
+        }
+        
+        // Write <export>
+        for (Export export: contribution.getExports()) {
+            extensionProcessor.write(export, writer);
+        }
+    
+        // Write <deployable>
+        for (Composite deployable: contribution.getDeployables()) {
+            writeStart(writer, DEPLOYABLE_QNAME.getNamespaceURI(), DEPLOYABLE_QNAME.getLocalPart(),
+                       new XAttr("composite", deployable.getName()));
+            writeEnd(writer);
+        }
+        
+        writeEndDocument(writer);
+    }
+
+    public void resolve(ContributionMetadata contribution, ModelResolver resolver) throws ContributionResolveException {
+               
+        // Resolve imports and exports
+        for (Export export: contribution.getExports()) {
+            extensionProcessor.resolve(export, resolver);
+        }
+        for (Import import_: contribution.getImports()) {
+            extensionProcessor.resolve(import_, resolver);
+        }
+        
+        // Resolve deployable composites
+        List<Composite> deployables = contribution.getDeployables();        
+        for (int i = 0, n = deployables.size(); i < n; i++) {
+            Composite deployable = deployables.get(i);
+            Composite resolved = (Composite)resolver.resolveModel(Composite.class, deployable);
+            if (resolved != deployable) {
+                deployables.set(i, resolved);
+            }
+        }
+        
+        contribution.setUnresolved(false);
+    }
+}
diff --git a/java/sca/modules/contribution-xml/src/main/java/org/apache/tuscany/sca/contribution/xml/ContributionModelResolver.java b/java/sca/modules/contribution-xml/src/main/java/org/apache/tuscany/sca/contribution/xml/ContributionModelResolver.java
new file mode 100644
index 0000000000..f226dbbee3
--- /dev/null
+++ b/java/sca/modules/contribution-xml/src/main/java/org/apache/tuscany/sca/contribution/xml/ContributionModelResolver.java
@@ -0,0 +1,72 @@
+/*
+ * 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.xml;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import org.apache.tuscany.sca.contribution.Contribution;
+import org.apache.tuscany.sca.contribution.ModelFactoryExtensionPoint;
+import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
+
+/**
+ * A Model Resolver for Contribution models.
+ *
+ * @version $Rev$ $Date$
+ */
+public class ContributionModelResolver implements ModelResolver {
+
+    private Map<String, Contribution> map = new HashMap<String, Contribution>();
+    
+    public ContributionModelResolver(Contribution contribution, ModelFactoryExtensionPoint modelFactories) {
+    }
+
+    public void addModel(Object resolved) {
+        Contribution contribution = (Contribution)resolved;
+        map.put(contribution.getURI(), contribution);
+    }
+    
+    public Object removeModel(Object resolved) {
+        return map.remove(((Contribution)resolved).getURI());
+    }
+    
+    public <T> T resolveModel(Class<T> modelClass, T unresolved) {
+        
+        // Lookup a contribution for the given URI
+        String uri = ((Contribution)unresolved).getURI();
+        if (uri != null) {
+            Contribution resolved = (Contribution) map.get(uri);
+            if (resolved != null) {
+                return modelClass.cast(resolved);
+            }
+            return unresolved;
+        } else {
+            
+            // If no URI was specified, just return the first contribution
+            if (!map.isEmpty()) {
+                Contribution resolved = map.values().iterator().next();
+                return modelClass.cast(resolved);
+            } else {
+                return unresolved;
+            }
+        }
+    }
+    
+}
diff --git a/java/sca/modules/contribution-xml/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor b/java/sca/modules/contribution-xml/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor
new file mode 100644
index 0000000000..b73c380370
--- /dev/null
+++ b/java/sca/modules/contribution-xml/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor
@@ -0,0 +1,19 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+# 
+#   http://www.apache.org/licenses/LICENSE-2.0
+# 
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License. 
+
+# Implementation class for the artifact processor extension
+org.apache.tuscany.sca.contribution.xml.ContributionMetadataProcessor;qname=http://www.osoa.org/xmlns/sca/1.0#contribution,model=org.apache.tuscany.sca.contribution.ContributionMetadata
diff --git a/java/sca/modules/contribution-xml/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.processor.URLArtifactProcessor b/java/sca/modules/contribution-xml/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.processor.URLArtifactProcessor
new file mode 100644
index 0000000000..23adab56b9
--- /dev/null
+++ b/java/sca/modules/contribution-xml/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.processor.URLArtifactProcessor
@@ -0,0 +1,20 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+# 
+#   http://www.apache.org/licenses/LICENSE-2.0
+# 
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License. 
+
+# Implementation class for the artifact processor extension
+org.apache.tuscany.sca.contribution.xml.ContributionMetadataDocumentProcessor;type=sca-contribution.xml,model=org.apache.tuscany.sca.contribution.ContributionMetadata
+org.apache.tuscany.sca.contribution.xml.ContributionGeneratedMetadataDocumentProcessor;type=sca-contribution-generated.xml
diff --git a/java/sca/modules/contribution-xml/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.resolver.ModelResolver b/java/sca/modules/contribution-xml/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.resolver.ModelResolver
new file mode 100644
index 0000000000..68030bf6e6
--- /dev/null
+++ b/java/sca/modules/contribution-xml/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.resolver.ModelResolver
@@ -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.xml.ContributionModelResolver;model=org.apache.tuscany.sca.contribution.Contribution

diff --git a/java/sca/modules/contribution-xml/src/main/resources/contribution-xml-validation-messages.properties b/java/sca/modules/contribution-xml/src/main/resources/contribution-xml-validation-messages.properties
new file mode 100644
index 0000000000..3e1a0187fe
--- /dev/null
+++ b/java/sca/modules/contribution-xml/src/main/resources/contribution-xml-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.
+#
+#
+XMLStreamException = XMLStreamException occured due to:
+IOException = IOException occured due to:
+AttributeCompositeMissing = Attribute 'composite' is missing
\ No newline at end of file
diff --git a/java/sca/modules/contribution-xml/src/test/java/org/apache/tuscany/sca/contribution/xml/ContributionMetadataProcessorTestCase.java b/java/sca/modules/contribution-xml/src/test/java/org/apache/tuscany/sca/contribution/xml/ContributionMetadataProcessorTestCase.java
new file mode 100644
index 0000000000..8f69f15cd1
--- /dev/null
+++ b/java/sca/modules/contribution-xml/src/test/java/org/apache/tuscany/sca/contribution/xml/ContributionMetadataProcessorTestCase.java
@@ -0,0 +1,141 @@
+/*
+ * 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.xml;
+
+import java.io.StringReader;
+import java.io.StringWriter;
+
+import javax.xml.namespace.QName;
+import javax.xml.stream.XMLInputFactory;
+import javax.xml.stream.XMLOutputFactory;
+import javax.xml.stream.XMLStreamReader;
+import javax.xml.stream.XMLStreamWriter;
+
+import junit.framework.TestCase;
+
+import org.apache.tuscany.sca.contribution.ContributionMetadata;
+import org.apache.tuscany.sca.contribution.processor.ExtensibleStAXArtifactProcessor;
+import org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor;
+import org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessorExtensionPoint;
+import org.apache.tuscany.sca.core.DefaultExtensionPointRegistry;
+import org.apache.tuscany.sca.core.ExtensionPointRegistry;
+import org.apache.tuscany.sca.core.UtilityExtensionPoint;
+import org.apache.tuscany.sca.monitor.Monitor;
+import org.apache.tuscany.sca.monitor.MonitorFactory;
+import org.apache.tuscany.sca.monitor.Problem;
+import org.apache.tuscany.sca.monitor.impl.DefaultMonitorFactoryImpl;
+import org.apache.tuscany.sca.monitor.impl.DefaultMonitorImpl;
+
+/**
+ * Test the contribution metadata processor.
+ * 
+ * @version $Rev$ $Date$
+ */
+
+public class ContributionMetadataProcessorTestCase extends TestCase {
+
+    private static final String VALID_XML =
+        "<?xml version=\"1.0\" encoding=\"UTF-8\"?>" 
+            + "<contribution xmlns=\"http://www.osoa.org/xmlns/sca/1.0\" xmlns:ns=\"http://ns\">"
+            + "<deployable composite=\"ns:Composite1\"/>"
+            + "<deployable composite=\"ns:Composite2\"/>"
+            + "</contribution>";
+
+    private static final String INVALID_XML =
+        "<?xml version=\"1.0\" encoding=\"UTF-8\"?>" 
+            + "<contribution xmlns=\"http://www.osoa.org/xmlns/sca/1.0\" xmlns:ns=\"http://ns\">"
+            + "<deployable composite=\"ns:Composite1\"/>"
+            + "<deployable/>"
+            + "</contribution>";
+    
+    private XMLInputFactory inputFactory;
+    private XMLOutputFactory outputFactory;
+    private StAXArtifactProcessor<Object> staxProcessor;
+    private Monitor monitor;
+
+    @Override
+    protected void setUp() throws Exception {
+        ExtensionPointRegistry extensionPoints = new DefaultExtensionPointRegistry();
+        
+        inputFactory = XMLInputFactory.newInstance();
+        outputFactory = XMLOutputFactory.newInstance();
+        
+        // Create a monitor
+        UtilityExtensionPoint utilities = extensionPoints.getExtensionPoint(UtilityExtensionPoint.class);
+        MonitorFactory monitorFactory = new DefaultMonitorFactoryImpl();  
+        if (monitorFactory != null) {
+        	monitor = monitorFactory.createMonitor();
+        	utilities.addUtility(monitorFactory);
+        }        
+        StAXArtifactProcessorExtensionPoint staxProcessors = extensionPoints.getExtensionPoint(StAXArtifactProcessorExtensionPoint.class);
+        staxProcessor = new ExtensibleStAXArtifactProcessor(staxProcessors, inputFactory, outputFactory, null);
+    }
+
+    public void testRead() throws Exception {
+        XMLStreamReader reader = inputFactory.createXMLStreamReader(new StringReader(VALID_XML));
+        ContributionMetadata contribution = (ContributionMetadata)staxProcessor.read(reader);
+        assertNotNull(contribution);
+        assertEquals(2, contribution.getDeployables().size());
+  }
+
+    public void testReadInvalid() throws Exception {
+        XMLStreamReader reader = inputFactory.createXMLStreamReader(new StringReader(INVALID_XML));
+        /*try {
+            staxProcessor.read(reader);
+            fail("InvalidException should have been thrown");
+        } catch (ContributionReadException e) {
+            assertTrue(true);
+        }*/
+        staxProcessor.read(reader);
+        Problem problem = ((DefaultMonitorImpl)monitor).getLastLoggedProblem();           
+        assertNotNull(problem);
+        assertEquals("AttributeCompositeMissing", problem.getMessageId());
+    }    
+
+    public void testWrite() throws Exception {
+        XMLStreamReader reader = inputFactory.createXMLStreamReader(new StringReader(VALID_XML));
+        ContributionMetadata contribution = (ContributionMetadata)staxProcessor.read(reader);
+
+        validateContribution(contribution);
+        
+        //write the contribution metadata contents
+        StringWriter stringWriter = new StringWriter();
+        XMLStreamWriter writer = outputFactory.createXMLStreamWriter(stringWriter);
+        staxProcessor.write(contribution, writer);
+        stringWriter.close();
+
+        reader = inputFactory.createXMLStreamReader(new StringReader(stringWriter.toString()));
+        contribution = (ContributionMetadata)staxProcessor.read(reader);
+        
+        validateContribution(contribution);
+  }
+    
+  private void validateContribution(ContributionMetadata contribution) {
+	  QName deployable;
+	  
+	  assertNotNull(contribution);
+	  assertEquals(2, contribution.getDeployables().size());
+	  deployable = new QName("http://ns", "Composite1");
+	  assertEquals(deployable, contribution.getDeployables().get(0).getName());
+	  deployable = new QName("http://ns", "Composite2");
+	  assertEquals(deployable, contribution.getDeployables().get(1).getName());	  
+  }
+    
+}