Move Tuscany from Incubator to top level.

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

17 files changed, 1094 insertions, 0 deletions

diff --git a/java/sca/modules/contribution-namespace/src/main/java/org/apache/tuscany/sca/contribution/namespace/DefaultNamespaceImportExportFactory.java b/java/sca/modules/contribution-namespace/src/main/java/org/apache/tuscany/sca/contribution/namespace/DefaultNamespaceImportExportFactory.java
new file mode 100644
index 0000000000..a71fa61a54
--- /dev/null
+++ b/java/sca/modules/contribution-namespace/src/main/java/org/apache/tuscany/sca/contribution/namespace/DefaultNamespaceImportExportFactory.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.namespace;
+
+import org.apache.tuscany.sca.contribution.namespace.impl.NamespaceImportExportFactoryImpl;
+
+/**
+ * Default Namespace Import/Export model factory implementation
+ * 
+ * @version $Rev$ $Date$
+ */
+public class DefaultNamespaceImportExportFactory extends NamespaceImportExportFactoryImpl implements NamespaceImportExportFactory {
+}
diff --git a/java/sca/modules/contribution-namespace/src/main/java/org/apache/tuscany/sca/contribution/namespace/NamespaceExport.java b/java/sca/modules/contribution-namespace/src/main/java/org/apache/tuscany/sca/contribution/namespace/NamespaceExport.java
new file mode 100644
index 0000000000..c68aee8521
--- /dev/null
+++ b/java/sca/modules/contribution-namespace/src/main/java/org/apache/tuscany/sca/contribution/namespace/NamespaceExport.java
@@ -0,0 +1,46 @@
+/*
+ * 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.namespace;
+
+import org.apache.tuscany.sca.contribution.Export;
+
+
+/**
+ * The representation of an XML namespace export.
+ * 
+ * @version $Rev$ $Date$
+ */
+public interface NamespaceExport extends Export {
+
+    /**
+     * Get Namespace that identifies the export
+     * 
+     * @return The exported namespace
+     */
+    String getNamespace();
+
+    /**
+     * Set Namespace that identifies the export
+     * 
+     * @param namespace The exported namespace
+     */
+    void setNamespace(String namespace);
+    
+}
diff --git a/java/sca/modules/contribution-namespace/src/main/java/org/apache/tuscany/sca/contribution/namespace/NamespaceImport.java b/java/sca/modules/contribution-namespace/src/main/java/org/apache/tuscany/sca/contribution/namespace/NamespaceImport.java
new file mode 100644
index 0000000000..8af36d7da0
--- /dev/null
+++ b/java/sca/modules/contribution-namespace/src/main/java/org/apache/tuscany/sca/contribution/namespace/NamespaceImport.java
@@ -0,0 +1,59 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.contribution.namespace;
+
+import org.apache.tuscany.sca.contribution.Import;
+
+/**
+ * The representation of an XML namespace import.
+ * 
+ * @version $Rev$ $Date$
+ */
+public interface NamespaceImport 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 Namespace that identifies the import
+     * 
+     * @return The namespace
+     */
+    String getNamespace();
+
+    /**
+     * Set Namespace that identifies the import
+     * 
+     * @param namespace The namespace
+     */
+    void setNamespace(String namespace);
+    
+}
\ No newline at end of file
diff --git a/java/sca/modules/contribution-namespace/src/main/java/org/apache/tuscany/sca/contribution/namespace/NamespaceImportExportFactory.java b/java/sca/modules/contribution-namespace/src/main/java/org/apache/tuscany/sca/contribution/namespace/NamespaceImportExportFactory.java
new file mode 100644
index 0000000000..cfbac8bb1f
--- /dev/null
+++ b/java/sca/modules/contribution-namespace/src/main/java/org/apache/tuscany/sca/contribution/namespace/NamespaceImportExportFactory.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.namespace;
+
+/**
+ * Base Namespace import/export model factory
+ * 
+ * @version $Rev$ $Date$
+ */
+public interface NamespaceImportExportFactory {
+
+    /**
+     * Create a namespace import model object
+     * 
+     * @return The new NamespaceImport model object
+     */
+    NamespaceImport createNamespaceImport();
+    
+    /**
+     * Create a namespace export model object
+     * 
+     * @return The new NamespaceExport model object
+     */
+    NamespaceExport createNamespaceExport();
+}
diff --git a/java/sca/modules/contribution-namespace/src/main/java/org/apache/tuscany/sca/contribution/namespace/impl/NamespaceExportImpl.java b/java/sca/modules/contribution-namespace/src/main/java/org/apache/tuscany/sca/contribution/namespace/impl/NamespaceExportImpl.java
new file mode 100644
index 0000000000..8991585d32
--- /dev/null
+++ b/java/sca/modules/contribution-namespace/src/main/java/org/apache/tuscany/sca/contribution/namespace/impl/NamespaceExportImpl.java
@@ -0,0 +1,54 @@
+/*
+ * 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.namespace.impl;
+
+import org.apache.tuscany.sca.contribution.namespace.NamespaceExport;
+import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
+
+/**
+ * The representation of an export for the contribution
+ * 
+ * @version $Rev$ $Date$
+ */
+public class NamespaceExportImpl implements NamespaceExport {
+    private String namespace; 
+    private ModelResolver modelResolver;
+    
+    protected NamespaceExportImpl() {
+        super();
+    }
+    
+    public String getNamespace() {
+        return namespace;
+    }
+
+    public void setNamespace(String namespace) {
+        this.namespace = namespace;
+    }
+    
+    public ModelResolver getModelResolver() {
+        return modelResolver;
+    }
+    
+    public void setModelResolver(ModelResolver modelResolver) {
+        this.modelResolver = modelResolver;
+    }
+    
+}
diff --git a/java/sca/modules/contribution-namespace/src/main/java/org/apache/tuscany/sca/contribution/namespace/impl/NamespaceExportModelResolver.java b/java/sca/modules/contribution-namespace/src/main/java/org/apache/tuscany/sca/contribution/namespace/impl/NamespaceExportModelResolver.java
new file mode 100644
index 0000000000..5c5ae22f77
--- /dev/null
+++ b/java/sca/modules/contribution-namespace/src/main/java/org/apache/tuscany/sca/contribution/namespace/impl/NamespaceExportModelResolver.java
@@ -0,0 +1,54 @@
+/*
+ * 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.namespace.impl;
+
+import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
+
+/**
+ * A model resolver for namespace exports.
+ *
+ * @version $Rev$ $Date$
+ */
+public class NamespaceExportModelResolver implements ModelResolver {
+
+    private ModelResolver resolver;
+    
+    public NamespaceExportModelResolver(ModelResolver resolver) {
+        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) {
+        
+        // Just delegate to the contribution's model resolver, namespace
+        // based filtering is implemented in the model specific model
+        // resolver, which know how to get the namespace of the particular
+        // type of model that they handle 
+        return resolver.resolveModel(modelClass, unresolved);
+    }
+
+}
diff --git a/java/sca/modules/contribution-namespace/src/main/java/org/apache/tuscany/sca/contribution/namespace/impl/NamespaceExportProcessor.java b/java/sca/modules/contribution-namespace/src/main/java/org/apache/tuscany/sca/contribution/namespace/impl/NamespaceExportProcessor.java
new file mode 100644
index 0000000000..64862301c1
--- /dev/null
+++ b/java/sca/modules/contribution-namespace/src/main/java/org/apache/tuscany/sca/contribution/namespace/impl/NamespaceExportProcessor.java
@@ -0,0 +1,142 @@
+/*
+ * 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.namespace.impl;
+
+import static javax.xml.stream.XMLStreamConstants.START_ELEMENT;
+
+import javax.xml.namespace.QName;
+import javax.xml.stream.XMLStreamConstants;
+import javax.xml.stream.XMLStreamException;
+import javax.xml.stream.XMLStreamReader;
+import javax.xml.stream.XMLStreamWriter;
+
+import org.apache.tuscany.sca.assembly.builder.impl.ProblemImpl;
+import org.apache.tuscany.sca.contribution.ModelFactoryExtensionPoint;
+import org.apache.tuscany.sca.contribution.namespace.NamespaceExport;
+import org.apache.tuscany.sca.contribution.namespace.NamespaceImportExportFactory;
+import org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor;
+import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
+import org.apache.tuscany.sca.contribution.service.ContributionReadException;
+import org.apache.tuscany.sca.contribution.service.ContributionResolveException;
+import org.apache.tuscany.sca.contribution.service.ContributionWriteException;
+import org.apache.tuscany.sca.monitor.Monitor;
+import org.apache.tuscany.sca.monitor.Problem;
+import org.apache.tuscany.sca.monitor.Problem.Severity;
+
+/**
+ * Artifact processor for Namespace export
+ * 
+ * @version $Rev$ $Date$
+ */
+public class NamespaceExportProcessor implements StAXArtifactProcessor<NamespaceExport> {
+
+    private static final String SCA10_NS = "http://www.osoa.org/xmlns/sca/1.0";
+    private static final QName EXPORT = new QName(SCA10_NS, "export");
+    private static final String NAMESPACE = "namespace";
+    
+    private final NamespaceImportExportFactory factory;
+    private final Monitor monitor;
+    
+    public NamespaceExportProcessor(ModelFactoryExtensionPoint modelFactories, Monitor monitor) {
+        this.factory = modelFactories.getFactory(NamespaceImportExportFactory.class);
+        this.monitor = monitor;
+    }
+    
+    /**
+     * Report a warning.
+     * 
+     * @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-namespace-validation-messages", Severity.ERROR, model, message, (Object[])messageParameters);
+	        monitor.problem(problem);
+    	 }
+     }
+
+    public QName getArtifactType() {
+        return EXPORT;
+    }
+    
+    public Class<NamespaceExport> getModelType() {
+        return NamespaceExport.class;
+    }
+    
+    /**
+     * Process <export namespace=""/>
+     */
+    public NamespaceExport read(XMLStreamReader reader) throws ContributionReadException, XMLStreamException {
+        NamespaceExport namespaceExport = this.factory.createNamespaceExport();
+        QName element = null;
+        
+        while (reader.hasNext()) {
+            int event = reader.getEventType();
+            switch (event) {
+                case START_ELEMENT:
+                    element = reader.getName();
+                    
+                    // Read <export>
+                    if (EXPORT.equals(element)) {
+                        String ns = reader.getAttributeValue(null, NAMESPACE);
+                        if (ns == null) {
+                        	error("AttributeNameSpaceMissing", reader);
+                            //throw new ContributionReadException("Attribute 'namespace' is missing");
+                        } else
+                            namespaceExport.setNamespace(ns);
+                    } 
+                    
+                    break;
+                case XMLStreamConstants.END_ELEMENT:
+                    if (EXPORT.equals(reader.getName())) {
+                        return namespaceExport;
+                    }
+                    break;        
+            }
+            
+            // Read the next element
+            if (reader.hasNext()) {
+                reader.next();
+            }
+        }
+        
+        return namespaceExport;
+    }
+
+    public void write(NamespaceExport namespaceExport, XMLStreamWriter writer) throws ContributionWriteException, XMLStreamException {
+        
+        // Write <export>
+        writer.writeStartElement(EXPORT.getNamespaceURI(), EXPORT.getLocalPart());
+        
+        if (namespaceExport.getNamespace() != null) {
+            writer.writeAttribute(NAMESPACE, namespaceExport.getNamespace());
+        }
+        
+        writer.writeEndElement();
+    }
+
+    public void resolve(NamespaceExport namespaceExport, ModelResolver resolver) throws ContributionResolveException {
+        
+        if (namespaceExport.getNamespace() != null)
+            // Initialize the export's resolver
+            namespaceExport.setModelResolver(new NamespaceExportModelResolver(resolver));
+    }
+}
diff --git a/java/sca/modules/contribution-namespace/src/main/java/org/apache/tuscany/sca/contribution/namespace/impl/NamespaceImportExportFactoryImpl.java b/java/sca/modules/contribution-namespace/src/main/java/org/apache/tuscany/sca/contribution/namespace/impl/NamespaceImportExportFactoryImpl.java
new file mode 100644
index 0000000000..1146e593a9
--- /dev/null
+++ b/java/sca/modules/contribution-namespace/src/main/java/org/apache/tuscany/sca/contribution/namespace/impl/NamespaceImportExportFactoryImpl.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.namespace.impl;
+
+import org.apache.tuscany.sca.contribution.namespace.NamespaceExport;
+import org.apache.tuscany.sca.contribution.namespace.NamespaceImport;
+import org.apache.tuscany.sca.contribution.namespace.NamespaceImportExportFactory;
+
+/**
+ * Namespace Import/Export model factory implementation
+ * 
+ * @version $Rev$ $Date$
+ */
+public class NamespaceImportExportFactoryImpl implements NamespaceImportExportFactory {
+
+    public NamespaceImport createNamespaceImport() {
+        return new NamespaceImportImpl();
+    }
+    
+    public NamespaceExport createNamespaceExport() {
+        return new NamespaceExportImpl();
+    }
+
+}
diff --git a/java/sca/modules/contribution-namespace/src/main/java/org/apache/tuscany/sca/contribution/namespace/impl/NamespaceImportExportListener.java b/java/sca/modules/contribution-namespace/src/main/java/org/apache/tuscany/sca/contribution/namespace/impl/NamespaceImportExportListener.java
new file mode 100644
index 0000000000..7ea09a47c7
--- /dev/null
+++ b/java/sca/modules/contribution-namespace/src/main/java/org/apache/tuscany/sca/contribution/namespace/impl/NamespaceImportExportListener.java
@@ -0,0 +1,98 @@
+/*
+ * 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.namespace.impl;
+
+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.namespace.NamespaceExport;
+import org.apache.tuscany.sca.contribution.namespace.NamespaceImport;
+import org.apache.tuscany.sca.contribution.resolver.DefaultImportAllModelResolver;
+import org.apache.tuscany.sca.contribution.service.ContributionListener;
+import org.apache.tuscany.sca.contribution.service.ContributionRepository;
+
+/**
+ * Namespace Import/Export contribution listener
+ * The listener would process all import/export from a given contribution 
+ * and initialize the model resolvers properly
+ * 
+ * @version $Rev$ $Date$
+ */
+public class NamespaceImportExportListener implements ContributionListener {
+
+    /**
+     * Initialize the import/export model resolvers
+     * Export model resolvers are same as Contribution model resolver
+     * Import model resolvers are matched to a specific contribution if a location URI is specified, 
+     *    otherwise it try to resolve against all the other contributions
+     * Also set the exporting contributions used by contribution ClassLoaders to 
+     * match import/export for class loading.
+     */    
+    public void contributionAdded(ContributionRepository repository, Contribution contribution) {
+        // Initialize the contribution exports
+        for (Export export: contribution.getExports()) {
+            export.setModelResolver(contribution.getModelResolver());
+        }
+        
+        // Initialize the contribution imports
+        for (Import import_: contribution.getImports()) {
+            boolean initialized = false;
+
+            if (import_ instanceof NamespaceImport) {
+                NamespaceImport namespaceImport = (NamespaceImport)import_;
+                
+                // Find a matching contribution
+                if (namespaceImport.getLocation() != null) {
+                    Contribution targetContribution = repository.getContribution(namespaceImport.getLocation());
+                    if (targetContribution != null) {
+                    
+                        // Find a matching contribution export
+                        for (Export export: targetContribution.getExports()) {
+                            if (export instanceof NamespaceExport) {
+                                NamespaceExport namespaceExport = (NamespaceExport)export;
+                                if (namespaceImport.getNamespace().equals(namespaceExport.getNamespace())) {
+                                    namespaceImport.setModelResolver(namespaceExport.getModelResolver());
+                                    initialized = true;
+                                    break;
+                                }
+                            }
+                        }
+                    }
+                } 
+                
+                //if no location was specified, try to resolve with any contribution            
+                if( !initialized ) {
+                    // Use a resolver that will consider all contributions
+                    import_.setModelResolver(new DefaultImportAllModelResolver(import_, repository.getContributions()));
+                }
+            } 
+        }
+
+    }
+
+    public void contributionRemoved(ContributionRepository repository, Contribution contribution) {
+
+    }
+
+    public void contributionUpdated(ContributionRepository repository, Contribution oldContribution, Contribution contribution) {
+
+    }
+
+}
diff --git a/java/sca/modules/contribution-namespace/src/main/java/org/apache/tuscany/sca/contribution/namespace/impl/NamespaceImportImpl.java b/java/sca/modules/contribution-namespace/src/main/java/org/apache/tuscany/sca/contribution/namespace/impl/NamespaceImportImpl.java
new file mode 100644
index 0000000000..6d2a31f702
--- /dev/null
+++ b/java/sca/modules/contribution-namespace/src/main/java/org/apache/tuscany/sca/contribution/namespace/impl/NamespaceImportImpl.java
@@ -0,0 +1,92 @@
+/*
+ * 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.namespace.impl;
+
+import org.apache.tuscany.sca.contribution.Export;
+import org.apache.tuscany.sca.contribution.namespace.NamespaceExport;
+import org.apache.tuscany.sca.contribution.namespace.NamespaceImport;
+import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
+
+/**
+ * The representation of an import for the contribution
+ * 
+ * @version $Rev$ $Date$
+ */
+public class NamespaceImportImpl implements NamespaceImport {
+    private ModelResolver modelResolver;
+
+    /**
+     * The namespace to be imported
+     */
+    private String namespace; 
+    /**
+     * Optional location URI pointing to a Contribution that exports the namespace
+     */
+    private String location;
+
+    
+    protected NamespaceImportImpl() {
+        super();
+    }
+    
+    public String getLocation() {
+        return location;
+    }
+
+    public void setLocation(String location) {
+        this.location = location;
+    }
+
+    public String getNamespace() {
+        return namespace;
+    }
+
+    public void setNamespace(String namespace) {
+        this.namespace = namespace;
+    }
+    
+    public ModelResolver getModelResolver() {
+        return modelResolver;
+    }
+    
+    public void setModelResolver(ModelResolver modelResolver) {
+        this.modelResolver = modelResolver;
+    }
+
+    
+    /**
+     * Match a NamespaceImport to a given NamespaceExport based on :
+     *    location is not provided
+     *    import and export namespaces match
+     */
+    public boolean match(Export export) {
+        if (export instanceof NamespaceExport) {
+            if (this.getNamespace().equals(((NamespaceExport)export).getNamespace())) {
+                return true;
+            }
+        }
+        return false;
+    }
+    
+    @Override
+    public String toString() {
+        return String.valueOf(namespace);
+    }
+}
diff --git a/java/sca/modules/contribution-namespace/src/main/java/org/apache/tuscany/sca/contribution/namespace/impl/NamespaceImportProcessor.java b/java/sca/modules/contribution-namespace/src/main/java/org/apache/tuscany/sca/contribution/namespace/impl/NamespaceImportProcessor.java
new file mode 100644
index 0000000000..829e5fa43f
--- /dev/null
+++ b/java/sca/modules/contribution-namespace/src/main/java/org/apache/tuscany/sca/contribution/namespace/impl/NamespaceImportProcessor.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.namespace.impl;
+
+import static javax.xml.stream.XMLStreamConstants.START_ELEMENT;
+
+import javax.xml.namespace.QName;
+import javax.xml.stream.XMLStreamConstants;
+import javax.xml.stream.XMLStreamException;
+import javax.xml.stream.XMLStreamReader;
+import javax.xml.stream.XMLStreamWriter;
+
+import org.apache.tuscany.sca.assembly.builder.impl.ProblemImpl;
+import org.apache.tuscany.sca.contribution.ModelFactoryExtensionPoint;
+import org.apache.tuscany.sca.contribution.namespace.NamespaceImport;
+import org.apache.tuscany.sca.contribution.namespace.NamespaceImportExportFactory;
+import org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor;
+import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
+import org.apache.tuscany.sca.contribution.service.ContributionReadException;
+import org.apache.tuscany.sca.contribution.service.ContributionResolveException;
+import org.apache.tuscany.sca.contribution.service.ContributionWriteException;
+import org.apache.tuscany.sca.monitor.Monitor;
+import org.apache.tuscany.sca.monitor.Problem;
+import org.apache.tuscany.sca.monitor.Problem.Severity;
+
+/**
+ * Artifact processor for Namespace import
+ * 
+ * @version $Rev$ $Date$
+ */
+public class NamespaceImportProcessor  implements StAXArtifactProcessor<NamespaceImport> {
+    private static final String SCA10_NS = "http://www.osoa.org/xmlns/sca/1.0";
+    
+    private static final QName IMPORT = new QName(SCA10_NS, "import");
+
+    private static final String NAMESPACE = "namespace";
+    private static final String LOCATION = "location";
+    
+    private final NamespaceImportExportFactory factory;
+    private final Monitor monitor;
+    
+    public NamespaceImportProcessor(ModelFactoryExtensionPoint modelFactories, Monitor monitor) {
+        this.factory = modelFactories.getFactory(NamespaceImportExportFactory.class);
+        this.monitor = monitor;
+    }
+    
+    /**
+     * Report a warning.
+     * 
+     * @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-namespace-validation-messages", Severity.ERROR, model, message, (Object[])messageParameters);
+	        monitor.problem(problem);
+    	 }
+     }
+    
+    public QName getArtifactType() {
+        return IMPORT;
+    }
+    
+    public Class<NamespaceImport> getModelType() {
+        return NamespaceImport.class;
+    }
+
+    /**
+     * Process <import namespace="" location=""/>
+     */
+    public NamespaceImport read(XMLStreamReader reader) throws ContributionReadException, XMLStreamException {
+        NamespaceImport namespaceImport = this.factory.createNamespaceImport();
+        QName element;
+        
+        while (reader.hasNext()) {
+            int event = reader.getEventType();
+            switch (event) {
+                case START_ELEMENT:
+                    element = reader.getName();
+
+                    // Read <import>
+                    if (IMPORT.equals(element)) {
+                        String ns = reader.getAttributeValue(null, NAMESPACE);
+                        if (ns == null) {
+                        	error("AttributeNameSpaceMissing", reader);
+                            //throw new ContributionReadException("Attribute 'namespace' is missing");
+                        } else 
+                            namespaceImport.setNamespace(ns);
+
+                        String location = reader.getAttributeValue(null, LOCATION);
+                        if (location != null) {
+                            namespaceImport.setLocation(location);
+                        }
+                    }
+                    break;
+                case XMLStreamConstants.END_ELEMENT:
+                    if (IMPORT.equals(reader.getName())) {
+                        return namespaceImport;
+                    }
+                    break;        
+            }
+            
+            // Read the next element
+            if (reader.hasNext()) {
+                reader.next();
+            }
+        }
+        
+        return namespaceImport;
+    }
+
+    public void write(NamespaceImport namespaceImport, XMLStreamWriter writer) throws ContributionWriteException, XMLStreamException {
+        
+        // Write <import>
+        writer.writeStartElement(IMPORT.getNamespaceURI(), IMPORT.getLocalPart());
+        
+        if (namespaceImport.getNamespace() != null) {
+            writer.writeAttribute(NAMESPACE, namespaceImport.getNamespace());
+        }
+        if (namespaceImport.getLocation() != null) {
+            writer.writeAttribute(LOCATION, namespaceImport.getLocation());
+        }
+        
+        writer.writeEndElement();
+    }
+
+
+    public void resolve(NamespaceImport model, ModelResolver resolver) throws ContributionResolveException {
+    }
+}
diff --git a/java/sca/modules/contribution-namespace/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.namespace.NamespaceImportExportFactory b/java/sca/modules/contribution-namespace/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.namespace.NamespaceImportExportFactory
new file mode 100644
index 0000000000..095866fb6f
--- /dev/null
+++ b/java/sca/modules/contribution-namespace/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.namespace.NamespaceImportExportFactory
@@ -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.namespace.impl.NamespaceImportExportFactoryImpl

diff --git a/java/sca/modules/contribution-namespace/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor b/java/sca/modules/contribution-namespace/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor
new file mode 100644
index 0000000000..86f199368b
--- /dev/null
+++ b/java/sca/modules/contribution-namespace/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.namespace.impl.NamespaceImportProcessor;qname=http://www.osoa.org/xmlns/sca/1.0#import,model=org.apache.tuscany.sca.contribution.namespace.NamespaceImport
+org.apache.tuscany.sca.contribution.namespace.impl.NamespaceExportProcessor;qname=http://www.osoa.org/xmlns/sca/1.0#export,model=org.apache.tuscany.sca.contribution.namespace.NamespaceExport
diff --git a/java/sca/modules/contribution-namespace/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.service.ContributionListener b/java/sca/modules/contribution-namespace/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.service.ContributionListener
new file mode 100644
index 0000000000..cdf16a383f
--- /dev/null
+++ b/java/sca/modules/contribution-namespace/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.service.ContributionListener
@@ -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.namespace.impl.NamespaceImportExportListener

diff --git a/java/sca/modules/contribution-namespace/src/main/resources/contribution-namespace-validation-messages.properties b/java/sca/modules/contribution-namespace/src/main/resources/contribution-namespace-validation-messages.properties
new file mode 100644
index 0000000000..c7ddba3c3d
--- /dev/null
+++ b/java/sca/modules/contribution-namespace/src/main/resources/contribution-namespace-validation-messages.properties
@@ -0,0 +1,22 @@
+#
+#
+#    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.
+#
+#
+AttributeNameSpaceMissing = Attribute 'namespace' is missing
+
diff --git a/java/sca/modules/contribution-namespace/src/test/java/org/apache/tuscany/sca/contribution/namespace/impl/NamespaceExportProcessorTestCase.java b/java/sca/modules/contribution-namespace/src/test/java/org/apache/tuscany/sca/contribution/namespace/impl/NamespaceExportProcessorTestCase.java
new file mode 100644
index 0000000000..1f508d6a4a
--- /dev/null
+++ b/java/sca/modules/contribution-namespace/src/test/java/org/apache/tuscany/sca/contribution/namespace/impl/NamespaceExportProcessorTestCase.java
@@ -0,0 +1,103 @@
+/*
+ * 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.namespace.impl;
+
+import java.io.StringReader;
+
+import javax.xml.stream.XMLInputFactory;
+import javax.xml.stream.XMLStreamReader;
+
+import junit.framework.TestCase;
+
+import org.apache.tuscany.sca.contribution.namespace.NamespaceExport;
+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 NamespaceExportProcessorTestCase
+ *  
+ * @version $Rev$ $Date$
+ */
+public class NamespaceExportProcessorTestCase extends TestCase {
+
+    private static final String VALID_XML =
+        "<?xml version=\"1.0\" encoding=\"ASCII\"?>" 
+            + "<export xmlns=\"http://www.osoa.org/xmlns/sca/1.0\" xmlns:ns=\"http://ns\" namespace=\"http://foo\"/>";
+
+    private static final String INVALID_XML =
+        "<?xml version=\"1.0\" encoding=\"ASCII\"?>" 
+            + "<export xmlns=\"http://www.osoa.org/xmlns/sca/1.0\" xmlns:ns=\"http://ns\"/>";
+
+    private XMLInputFactory inputFactory;
+    private StAXArtifactProcessor<Object> staxProcessor;
+    private Monitor monitor;
+
+    @Override
+    protected void setUp() throws Exception {
+        ExtensionPointRegistry extensionPoints = new DefaultExtensionPointRegistry();
+        inputFactory = XMLInputFactory.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, null, monitor);
+    }
+
+    /**
+     * Test loading a valid export element from a contribution metadata stream
+     * @throws Exception
+     */
+    public void testLoad() throws Exception {
+        XMLStreamReader reader = inputFactory.createXMLStreamReader(new StringReader(VALID_XML));
+        NamespaceExport namespaceExport = (NamespaceExport)staxProcessor.read(reader);
+        assertEquals("http://foo", namespaceExport.getNamespace());
+    }
+
+    /**
+     * Test loading an INVALID export element from a contribution metadata stream
+     * @throws Exception
+     */
+    public void testLoadInvalid() throws Exception {
+        XMLStreamReader reader = inputFactory.createXMLStreamReader(new StringReader(INVALID_XML));
+        /*try {
+            staxProcessor.read(reader);
+            fail("readerException should have been thrown");
+        } catch (ContributionReadException e) {
+            assertTrue(true);
+        }*/
+        staxProcessor.read(reader);
+        Problem problem = ((DefaultMonitorImpl)monitor).getLastLoggedProblem();           
+        assertNotNull(problem);
+        assertEquals("AttributeNameSpaceMissing", problem.getMessageId());
+    }    
+}
diff --git a/java/sca/modules/contribution-namespace/src/test/java/org/apache/tuscany/sca/contribution/namespace/impl/NamespaceImportProcessorTestCase.java b/java/sca/modules/contribution-namespace/src/test/java/org/apache/tuscany/sca/contribution/namespace/impl/NamespaceImportProcessorTestCase.java
new file mode 100644
index 0000000000..71ac33bf68
--- /dev/null
+++ b/java/sca/modules/contribution-namespace/src/test/java/org/apache/tuscany/sca/contribution/namespace/impl/NamespaceImportProcessorTestCase.java
@@ -0,0 +1,108 @@
+/*
+ * 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.namespace.impl;
+
+
+
+import java.io.StringReader;
+
+import javax.xml.stream.XMLInputFactory;
+import javax.xml.stream.XMLStreamReader;
+
+import junit.framework.TestCase;
+
+import org.apache.tuscany.sca.contribution.namespace.NamespaceImport;
+import org.apache.tuscany.sca.contribution.processor.ExtensibleStAXArtifactProcessor;
+import org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor;
+import org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessorExtensionPoint;
+import org.apache.tuscany.sca.contribution.service.ContributionReadException;
+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 NamespaceImportProcessorTestCase
+ * 
+ * @version $Rev$ $Date$
+ */
+public class NamespaceImportProcessorTestCase extends TestCase {
+
+    private static final String VALID_XML =
+        "<?xml version=\"1.0\" encoding=\"ASCII\"?>" 
+            + "<import  xmlns=\"http://www.osoa.org/xmlns/sca/1.0\" xmlns:ns=\"http://ns\" namespace=\"http://foo\" location=\"sca://contributions/001\"/>";
+
+    private static final String INVALID_XML =
+        "<?xml version=\"1.0\" encoding=\"ASCII\"?>" 
+            + "<import  xmlns=\"http://www.osoa.org/xmlns/sca/1.0\" xmlns:ns=\"http://ns\" location=\"sca://contributions/001\"/>";
+
+    private XMLInputFactory inputFactory;
+    private StAXArtifactProcessor<Object> staxProcessor;
+    private Monitor monitor;
+
+    @Override
+    protected void setUp() throws Exception {
+        ExtensionPointRegistry extensionPoints = new DefaultExtensionPointRegistry();
+        inputFactory = XMLInputFactory.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, null, monitor);
+    }
+
+    /**
+     * Test loading a valid import element from a contribution metadata stream
+     * @throws Exception
+     */
+    public void testLoad() throws Exception {
+        XMLStreamReader reader = inputFactory.createXMLStreamReader(new StringReader(VALID_XML));
+        NamespaceImport namespaceImport = (NamespaceImport)staxProcessor.read(reader);
+        
+        assertEquals("http://foo", namespaceImport.getNamespace());
+        assertEquals("sca://contributions/001", namespaceImport.getLocation());
+    }
+
+    /**
+     * Test loading a INVALID import element from a contribution metadata stream
+     * @throws Exception
+     */
+    public void testLoadInvalid() throws Exception {
+        XMLStreamReader reader = inputFactory.createXMLStreamReader(new StringReader(INVALID_XML));
+        /*try {
+            staxProcessor.read(reader);
+            fail("readerException should have been thrown");
+        } catch (ContributionReadException e) {
+            assertTrue(true);
+        }*/
+        staxProcessor.read(reader);
+        Problem problem = ((DefaultMonitorImpl)monitor).getLastLoggedProblem();           
+        assertNotNull(problem);
+        assertEquals("AttributeNameSpaceMissing", problem.getMessageId());
+    }    
+}