Copy trunk to test sandbox trunk

git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@757348 13f79535-47bb-0310-9956-ffa450edef68

14 files changed, 1795 insertions, 0 deletions

diff --git a/sandbox/ant/sca/trunk/modules/contribution-xml/src/main/java/org/apache/tuscany/sca/contribution/processor/xml/AnyAttributeProcessor.java b/sandbox/ant/sca/trunk/modules/contribution-xml/src/main/java/org/apache/tuscany/sca/contribution/processor/xml/AnyAttributeProcessor.java
new file mode 100644
index 0000000000..aad7747522
--- /dev/null
+++ b/sandbox/ant/sca/trunk/modules/contribution-xml/src/main/java/org/apache/tuscany/sca/contribution/processor/xml/AnyAttributeProcessor.java
@@ -0,0 +1,80 @@
+/*
+ * 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.processor.xml;
+
+import javax.xml.namespace.QName;
+import javax.xml.stream.XMLStreamException;
+import javax.xml.stream.XMLStreamReader;
+import javax.xml.stream.XMLStreamWriter;
+
+import org.apache.tuscany.sca.assembly.AssemblyFactory;
+import org.apache.tuscany.sca.assembly.Extension;
+import org.apache.tuscany.sca.contribution.Constants;
+import org.apache.tuscany.sca.contribution.processor.BaseStAXArtifactProcessor;
+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.StAXAttributeProcessor;
+import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
+import org.apache.tuscany.sca.core.FactoryExtensionPoint;
+import org.apache.tuscany.sca.monitor.Monitor;
+
+/**
+ * A Policy Processor used for testing.
+ *
+ * @version $Rev$ $Date$
+ */
+public class AnyAttributeProcessor extends BaseStAXArtifactProcessor implements StAXAttributeProcessor<Extension> {
+    private static final QName ANY_ATTRIBUTE = new QName(Constants.XMLSCHEMA_NS, "anyAttribute");
+    
+    private AssemblyFactory assemblyFactory;
+
+    public AnyAttributeProcessor(FactoryExtensionPoint modelFactories, Monitor monitor) {
+        this.assemblyFactory = modelFactories.getFactory(AssemblyFactory.class);
+    }
+	
+    public QName getArtifactType() {
+        return ANY_ATTRIBUTE;
+    }
+
+    public Class<Extension> getModelType() {
+        return Extension.class;
+    }
+
+    public Extension read(QName attributeName, XMLStreamReader reader) throws ContributionReadException, XMLStreamException {
+        String attributeValue = reader.getAttributeValue(attributeName.getNamespaceURI(), attributeName.getLocalPart());
+        Extension ext = assemblyFactory.createExtension();
+        ext.setQName(attributeName);
+        ext.setAttribute(true);
+        ext.setValue(attributeValue);
+        return ext;
+    }
+
+    public void write(Extension attributeExtension, XMLStreamWriter writer) throws ContributionWriteException, XMLStreamException {
+    	writer.writeAttribute(attributeExtension.getQName().getPrefix(), 
+    	                      attributeExtension.getQName().getNamespaceURI(), 
+    	                      attributeExtension.getQName().getLocalPart(), 
+    	                      attributeExtension.getValue().toString());  //for extended attributes, we can assume values 
+    	                                                                  // are just the string representation fo the attribute
+    } 
+
+    public void resolve(Extension arg0, ModelResolver arg1) throws ContributionResolveException {
+    	
+    }
+}
diff --git a/sandbox/ant/sca/trunk/modules/contribution-xml/src/main/java/org/apache/tuscany/sca/contribution/processor/xml/AnyElementProcessor.java b/sandbox/ant/sca/trunk/modules/contribution-xml/src/main/java/org/apache/tuscany/sca/contribution/processor/xml/AnyElementProcessor.java
new file mode 100644
index 0000000000..68c46a2301
--- /dev/null
+++ b/sandbox/ant/sca/trunk/modules/contribution-xml/src/main/java/org/apache/tuscany/sca/contribution/processor/xml/AnyElementProcessor.java
@@ -0,0 +1,161 @@
+/*
+ * 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.processor.xml;
+
+import static javax.xml.stream.XMLStreamConstants.CDATA;
+import static javax.xml.stream.XMLStreamConstants.CHARACTERS;
+import static javax.xml.stream.XMLStreamConstants.END_ELEMENT;
+import static javax.xml.stream.XMLStreamConstants.START_ELEMENT;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import javax.xml.namespace.NamespaceContext;
+import javax.xml.namespace.QName;
+import javax.xml.stream.XMLEventReader;
+import javax.xml.stream.XMLInputFactory;
+import javax.xml.stream.XMLStreamException;
+import javax.xml.stream.XMLStreamReader;
+import javax.xml.stream.XMLStreamWriter;
+import javax.xml.stream.events.XMLEvent;
+
+import org.apache.tuscany.sca.contribution.Constants;
+import org.apache.tuscany.sca.contribution.processor.ContributionReadException;
+import org.apache.tuscany.sca.contribution.processor.ContributionResolveException;
+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;
+
+public class AnyElementProcessor implements StAXArtifactProcessor<Object> {
+    private static final QName ANY_ELEMENT = new QName(Constants.XMLSCHEMA_NS, "anyElement");
+
+    private XMLInputFactory xmlInputFactory;
+    @SuppressWarnings("unused")
+    private Monitor monitor;
+
+
+    public AnyElementProcessor(FactoryExtensionPoint modelFactories, Monitor monitor) {
+        xmlInputFactory = modelFactories.getFactory(XMLInputFactory.class);
+        this.monitor = monitor;
+    }
+
+    public QName getArtifactType() {
+        return ANY_ELEMENT;
+    }
+
+    public Class<Object> getModelType() {
+        return Object.class;
+    }
+
+    /**
+     * Reads the contetns of the unknown elements and generates a custom
+     * implementation of XMLStreamReader i.e. XMLEventsStreamReader
+     * 
+     * @param reader
+     * @return
+     * @throws XMLStreamException
+     */
+    @SuppressWarnings("unchecked")
+    public Object read(XMLStreamReader reader) throws ContributionReadException, XMLStreamException {
+
+        // Custom variables
+        String currentElement = null;
+        List eventsList = new ArrayList();
+
+        Map<String, NamespaceContext> eventContext = new HashMap<String, NamespaceContext>();
+
+        try {
+            // Cast the block of unknown elements into document
+            XMLDocumentStreamReader docReader = new XMLDocumentStreamReader(reader);
+
+            XMLEventReader xmlEventReader = xmlInputFactory.createXMLEventReader(docReader);
+
+            while (xmlEventReader.hasNext()) {
+                XMLEvent event = xmlEventReader.nextEvent();
+
+                // Populate the eventContext map with the current element's name
+                // and corresponding NamesapceContext
+                if (currentElement != null && !(eventContext.containsKey(currentElement))) {
+                    eventContext.put(currentElement, reader.getNamespaceContext());
+                }
+
+                // Populate the list with the XMLEvents
+                eventsList.add(event);
+                if (event.isStartElement()) {
+                    currentElement = reader.getName().getLocalPart();
+                }
+                if (event.isEndDocument()) {
+                    return new XMLEventsStreamReader(eventsList, eventContext);
+                }
+            }
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+        return null;
+    }
+
+    /**
+     * Writes unknown portions back to the writer
+     * 
+     * @param model
+     * @param writer
+     */
+    public void write(Object model, XMLStreamWriter writer) throws XMLStreamException {
+        if (!(model instanceof XMLStreamReader)) {
+            return;
+        }
+        XMLStreamReader reader = (XMLStreamReader)model;
+
+        int event = reader.getEventType();
+        while (reader.hasNext()) {
+            switch (event) {
+                case START_ELEMENT:
+
+                    writer.writeStartElement(reader.getPrefix(), reader.getLocalName(), reader.getNamespaceURI());
+                    for (int i = 1; i <= reader.getAttributeCount(); i++) {
+                        writer.writeAttribute(reader.getAttributePrefix(i), reader.getAttributeNamespace(i), reader
+                            .getAttributeLocalName(i), reader.getAttributeValue(i));
+                    }
+                    break;
+
+                case CHARACTERS:
+                    writer.writeCharacters(reader.getText());
+                    break;
+
+                case CDATA:
+                    writer.writeCData(reader.getText());
+                    break;
+
+                case END_ELEMENT:
+                    writer.writeEndElement();
+                    break;
+            }
+            if (reader.hasNext()) {
+                event = reader.next();
+            }
+        }
+    }
+
+    public void resolve(Object model, ModelResolver resolver) throws ContributionResolveException {
+
+    }
+}
diff --git a/sandbox/ant/sca/trunk/modules/contribution-xml/src/main/java/org/apache/tuscany/sca/contribution/processor/xml/XMLDocumentStreamReader.java b/sandbox/ant/sca/trunk/modules/contribution-xml/src/main/java/org/apache/tuscany/sca/contribution/processor/xml/XMLDocumentStreamReader.java
new file mode 100644
index 0000000000..7e8b3a9d9e
--- /dev/null
+++ b/sandbox/ant/sca/trunk/modules/contribution-xml/src/main/java/org/apache/tuscany/sca/contribution/processor/xml/XMLDocumentStreamReader.java
@@ -0,0 +1,482 @@
+/*
+ * 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.processor.xml;
+
+import java.util.NoSuchElementException;
+
+import javax.xml.namespace.NamespaceContext;
+import javax.xml.namespace.QName;
+import javax.xml.stream.Location;
+import javax.xml.stream.XMLStreamException;
+import javax.xml.stream.XMLStreamReader;
+
+/**
+ * This class is derived from Apache Axis2 class
+ * org.apache.axis2.util.StreamWrapper</a>. It's used wrap a XMLStreamReader to
+ * create a XMLStreamReader representing a document and it will produce
+ * START_DOCUMENT, END_DOCUMENT events.
+ *
+ * @version $Rev: 659153 $ $Date: 2008-05-22 09:43:58 -0700 (Thu, 22 May 2008) $
+ */
+public class XMLDocumentStreamReader implements XMLStreamReader {
+    private static final int STATE_COMPLETE_AT_NEXT = 2; // The wrapper
+													     // will produce
+													     // END_DOCUMENT
+
+    private static final int STATE_COMPLETED = 3;        // Done
+
+    private static final int STATE_INIT = 0;             // The wrapper will produce
+    										             // START_DOCUMENT
+
+    private static final int STATE_SWITCHED = 1;         // The real reader will
+    											         // produce events
+
+    private XMLStreamReader realReader;
+    private boolean fragment;
+    private int level = 0;
+
+    private int state = STATE_INIT;
+
+    public XMLDocumentStreamReader(XMLStreamReader realReader) {
+        if (realReader == null) {
+            throw new UnsupportedOperationException("Reader cannot be null");
+        }
+
+        this.realReader = realReader;
+        
+        if (realReader instanceof XMLFragmentStreamReader) {
+            ((XMLFragmentStreamReader)realReader).init();
+        }
+
+        // If the real reader is positioned at START_DOCUMENT, always use
+        // the real reader
+        if (realReader.getEventType() == START_DOCUMENT) {
+            fragment = false;
+            state = STATE_SWITCHED;
+        }
+    }
+
+    public void close() throws XMLStreamException {
+        realReader.close();
+    }
+
+    public int getAttributeCount() {
+        if (isDelegating()) {
+            return realReader.getAttributeCount();
+        } else {
+            throw new IllegalStateException();
+        }
+    }
+
+    public String getAttributeLocalName(int i) {
+        if (isDelegating()) {
+            return realReader.getAttributeLocalName(i);
+        } else {
+            throw new IllegalStateException();
+        }
+    }
+
+    public QName getAttributeName(int i) {
+        if (isDelegating()) {
+            return realReader.getAttributeName(i);
+        } else {
+            throw new IllegalStateException();
+        }
+    }
+
+    public String getAttributeNamespace(int i) {
+        if (isDelegating()) {
+            return realReader.getAttributeNamespace(i);
+        } else {
+            throw new IllegalStateException();
+        }
+    }
+
+    public String getAttributePrefix(int i) {
+        if (isDelegating()) {
+            return realReader.getAttributePrefix(i);
+        } else {
+            throw new IllegalStateException();
+        }
+    }
+
+    public String getAttributeType(int i) {
+        if (isDelegating()) {
+            return realReader.getAttributeType(i);
+        } else {
+            throw new IllegalStateException();
+        }
+    }
+
+    public String getAttributeValue(int i) {
+        if (isDelegating()) {
+            return realReader.getAttributeValue(i);
+        } else {
+            throw new IllegalStateException();
+        }
+    }
+
+    public String getAttributeValue(String s, String s1) {
+        if (isDelegating()) {
+            return realReader.getAttributeValue(s, s1);
+        } else {
+            throw new IllegalStateException();
+        }
+    }
+
+    public String getCharacterEncodingScheme() {
+        return realReader.getCharacterEncodingScheme();
+    }
+
+    public String getElementText() throws XMLStreamException {
+        if (isDelegating()) {
+            return realReader.getElementText();
+        } else {
+            throw new XMLStreamException();
+        }
+    }
+
+    public String getEncoding() {
+        return realReader.getEncoding();
+    }
+
+    public int getEventType() {
+        int event = -1;
+        switch (state) {
+            case STATE_SWITCHED:
+            case STATE_COMPLETE_AT_NEXT:
+                event = realReader.getEventType();
+                break;
+            case STATE_INIT:
+                event = START_DOCUMENT;
+                break;
+            case STATE_COMPLETED:
+                event = END_DOCUMENT;
+                break;
+        }
+        return event;
+    }
+
+    public String getLocalName() {
+        if (isDelegating()) {
+            return realReader.getLocalName();
+        } else {
+            throw new IllegalStateException();
+        }
+    }
+
+    public Location getLocation() {
+        if (isDelegating()) {
+            return realReader.getLocation();
+        } else {
+            return null;
+        }
+    }
+
+    public QName getName() {
+        if (isDelegating()) {
+            return realReader.getName();
+        } else {
+            throw new IllegalStateException();
+        }
+    }
+
+    public NamespaceContext getNamespaceContext() {
+        return realReader.getNamespaceContext();
+    }
+
+    public int getNamespaceCount() {
+        if (isDelegating()) {
+            return realReader.getNamespaceCount();
+        } else {
+            throw new IllegalStateException();
+        }
+    }
+
+    public String getNamespacePrefix(int i) {
+        if (isDelegating()) {
+            return realReader.getNamespacePrefix(i);
+        } else {
+            throw new IllegalStateException();
+        }
+    }
+
+    public String getNamespaceURI() {
+        if (isDelegating()) {
+            return realReader.getNamespaceURI();
+        } else {
+            throw new IllegalStateException();
+        }
+    }
+
+    public String getNamespaceURI(int i) {
+        if (isDelegating()) {
+            return realReader.getNamespaceURI(i);
+        } else {
+            throw new IllegalStateException();
+        }
+    }
+
+    public String getNamespaceURI(String s) {
+        if (isDelegating()) {
+            return realReader.getNamespaceURI(s);
+        } else {
+            throw new IllegalStateException();
+        }
+    }
+
+    public String getPIData() {
+        if (isDelegating()) {
+            return realReader.getPIData();
+        } else {
+            throw new IllegalStateException();
+        }
+    }
+
+    public String getPITarget() {
+        if (isDelegating()) {
+            return realReader.getPITarget();
+        } else {
+            throw new IllegalStateException();
+        }
+    }
+
+    public String getPrefix() {
+        if (isDelegating()) {
+            return realReader.getPrefix();
+        } else {
+            throw new IllegalStateException();
+        }
+    }
+
+    public Object getProperty(String s) throws IllegalArgumentException {
+        if (isDelegating()) {
+            return realReader.getProperty(s);
+        } else {
+            throw new IllegalArgumentException();
+        }
+    }
+
+    public String getText() {
+        if (isDelegating()) {
+            return realReader.getText();
+        } else {
+            throw new IllegalStateException();
+        }
+    }
+
+    public char[] getTextCharacters() {
+        if (isDelegating()) {
+            return realReader.getTextCharacters();
+        } else {
+            throw new IllegalStateException();
+        }
+    }
+
+    public int getTextCharacters(int i, char[] chars, int i1, int i2) throws XMLStreamException {
+        if (isDelegating()) {
+            return realReader.getTextCharacters(i, chars, i1, i2);
+        } else {
+            throw new IllegalStateException();
+        }
+    }
+
+    public int getTextLength() {
+        if (isDelegating()) {
+            return realReader.getTextLength();
+        } else {
+            throw new IllegalStateException();
+        }
+    }
+
+    public int getTextStart() {
+        if (isDelegating()) {
+            return realReader.getTextStart();
+        } else {
+            throw new IllegalStateException();
+        }
+    }
+
+    public String getVersion() {
+        if (isDelegating()) {
+            return realReader.getVersion();
+        } else {
+            return null;
+        }
+    }
+
+    public boolean hasName() {
+        if (isDelegating()) {
+            return realReader.hasName();
+        } else {
+            return false;
+        }
+    }
+
+    public boolean hasNext() throws XMLStreamException {
+        if (state == STATE_COMPLETE_AT_NEXT) {
+            return true;
+        } else if (state == STATE_COMPLETED) {
+            return false;
+        } else if (state == STATE_SWITCHED) {
+            return realReader.hasNext();
+        } else {
+            return true;
+        }
+    }
+
+    public boolean hasText() {
+        if (isDelegating()) {
+            return realReader.hasText();
+        } else {
+            return false;
+        }
+    }
+
+    public boolean isAttributeSpecified(int i) {
+        if (isDelegating()) {
+            return realReader.isAttributeSpecified(i);
+        } else {
+            return false;
+        }
+    }
+
+    public boolean isCharacters() {
+        if (isDelegating()) {
+            return realReader.isCharacters();
+        } else {
+            return false;
+        }
+    }
+
+    private boolean isDelegating() {
+        return state == STATE_SWITCHED || state == STATE_COMPLETE_AT_NEXT;
+    }
+
+    public boolean isEndElement() {
+        if (isDelegating()) {
+            return realReader.isEndElement();
+        } else {
+            return false;
+        }
+    }
+
+    public boolean isStandalone() {
+        if (isDelegating()) {
+            return realReader.isStandalone();
+        } else {
+            return false;
+        }
+    }
+
+    public boolean isStartElement() {
+        if (isDelegating()) {
+            return realReader.isStartElement();
+        } else {
+            return false;
+        }
+    }
+
+    public boolean isWhiteSpace() {
+        if (isDelegating()) {
+            return realReader.isWhiteSpace();
+        } else {
+            return false;
+        }
+    }
+
+    public int next() throws XMLStreamException {
+        int returnEvent;
+
+        switch (state) {
+            case STATE_SWITCHED:
+                returnEvent = realReader.next();
+                if (returnEvent == END_DOCUMENT) {
+                    state = STATE_COMPLETED;
+                } else if (!realReader.hasNext()) {
+                    state = STATE_COMPLETE_AT_NEXT;
+                } 
+                if (fragment && returnEvent == END_ELEMENT) {
+                    level--;
+                    if (level == -1) {
+                        // We are now at the end of the top-level element in the fragment
+                        state = STATE_COMPLETE_AT_NEXT;
+                    }
+                }
+                if (fragment && returnEvent == START_ELEMENT) {
+                    level++;
+                }
+                break;
+            case STATE_INIT:
+                state = STATE_SWITCHED;
+                returnEvent = realReader.getEventType();
+                if (returnEvent == START_ELEMENT) {
+                    // The real reader is positioned at the top-level element in the fragment
+                    level = 0;
+                    fragment = true;
+                }
+                break;
+            case STATE_COMPLETE_AT_NEXT:
+                state = STATE_COMPLETED;
+                returnEvent = END_DOCUMENT;
+                break;
+            case STATE_COMPLETED:
+                // oops - no way we can go beyond this
+                throw new NoSuchElementException("End of stream has reached.");
+            default:
+                throw new UnsupportedOperationException();
+        }
+
+        return returnEvent;
+    }
+
+    public int nextTag() throws XMLStreamException {
+        if (isDelegating()) {
+            int returnEvent = realReader.nextTag();
+            if (fragment && returnEvent == END_ELEMENT) {
+                level--;
+                if (level == 0) {
+                    // We are now at the end of the top-level element in the fragment
+                    state = STATE_COMPLETE_AT_NEXT;
+                }
+            }
+            if (fragment && returnEvent == START_ELEMENT) {
+                level++;
+            }
+            return returnEvent;
+        } else {
+            throw new XMLStreamException();
+        }
+    }
+
+    public void require(int i, String s, String s1) throws XMLStreamException {
+        if (isDelegating()) {
+            realReader.require(i, s, s1);
+        }
+    }
+
+    public boolean standaloneSet() {
+        if (isDelegating()) {
+            return realReader.standaloneSet();
+        } else {
+            return false;
+        }
+    }
+}
diff --git a/sandbox/ant/sca/trunk/modules/contribution-xml/src/main/java/org/apache/tuscany/sca/contribution/processor/xml/XMLEventsStreamReader.java b/sandbox/ant/sca/trunk/modules/contribution-xml/src/main/java/org/apache/tuscany/sca/contribution/processor/xml/XMLEventsStreamReader.java
new file mode 100644
index 0000000000..eecdee5ba6
--- /dev/null
+++ b/sandbox/ant/sca/trunk/modules/contribution-xml/src/main/java/org/apache/tuscany/sca/contribution/processor/xml/XMLEventsStreamReader.java
@@ -0,0 +1,444 @@
+/*
+ * 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.processor.xml;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+
+import javax.xml.namespace.NamespaceContext;
+import javax.xml.namespace.QName;
+import javax.xml.stream.Location;
+import javax.xml.stream.XMLStreamException;
+import javax.xml.stream.XMLStreamReader;
+import javax.xml.stream.events.Attribute;
+import javax.xml.stream.events.Namespace;
+import javax.xml.stream.events.ProcessingInstruction;
+import javax.xml.stream.events.XMLEvent;
+
+
+public class XMLEventsStreamReader implements XMLStreamReader {
+
+	@SuppressWarnings("unused")
+	private ArrayList<XMLEvent> events = null;
+	private HashMap<String, NamespaceContext> eventContext = null;
+
+	private int state;
+	private java.util.Iterator<XMLEvent> iterator;
+	private XMLEvent current;
+
+	public XMLEventsStreamReader(List<XMLEvent> events,Map<String, NamespaceContext> map) {
+		this.events = (ArrayList<XMLEvent>) events;
+		this.eventContext = (HashMap<String, NamespaceContext>) map;
+		this.iterator = events.iterator();
+		this.current = iterator.next();
+		this.state = current.getEventType();
+	}
+
+	public void close() throws XMLStreamException {
+		this.events = null;
+		this.eventContext = null;
+		this.iterator = null;
+		this.current = null;
+	}
+
+	private void checkElementState() {
+		if (getEventType() != START_ELEMENT && getEventType() != END_ELEMENT) {
+			throw new IllegalStateException();
+		}
+	}
+
+	@SuppressWarnings("unchecked")
+	public int getAttributeCount() {
+		checkElementState();
+		int count = 0;
+		Iterator<Attribute> iterator = current.asStartElement().getAttributes();
+		while (iterator.hasNext()) {
+			count++;
+			iterator.next();
+		}
+		return count;
+	}
+
+	/*
+	 * Custom method to get attribute from the specified index
+	 */
+	@SuppressWarnings("unchecked")
+	private Attribute getAttribute(int index) {
+		checkElementState();
+		int count = 0;
+		Attribute attribute = null;
+		Iterator<Attribute> iterator = current.asStartElement().getAttributes();
+		while (iterator.hasNext()) {
+			count++;
+			if (count == index) {
+				attribute = iterator.next();
+			} else {
+				iterator.next();
+			}
+		}
+		return attribute;
+	}
+
+	
+	public String getAttributeLocalName(int index) {
+		checkElementState();
+		return getAttribute(index).getName().getLocalPart();
+	}
+
+	public QName getAttributeName(int index) {
+		checkElementState();
+		return getAttribute(index).getName();
+	}
+
+	public String getAttributeNamespace(int index) {
+		checkElementState();
+		return getAttributeName(index).getNamespaceURI();
+	}
+
+	public String getAttributePrefix(int index) {
+		checkElementState();
+		return getAttributeName(index).getPrefix();
+	}
+
+	public String getAttributeType(int index) {
+		checkElementState();
+		return getAttribute(index).getDTDType();
+	}
+
+	public String getAttributeValue(int index) {
+		checkElementState();
+		return getAttribute(index).getValue();
+	}
+
+	@SuppressWarnings("unchecked")
+	public String getAttributeValue(String namespaceURI, String localName) {
+		checkElementState();
+		Iterator<Attribute> iterator = current.asStartElement().getAttributes();
+		Attribute attribute;
+		while (iterator.hasNext()) {
+			attribute = iterator.next();
+			if (attribute.getName().getNamespaceURI().equalsIgnoreCase(
+					namespaceURI)
+					&& attribute.getName().getLocalPart().equalsIgnoreCase(
+							localName)) {
+				return attribute.getValue();
+			}
+		}
+		return null;
+
+	}
+
+	public String getCharacterEncodingScheme() {
+		return "UTF-8";
+	}
+
+	public String getElementText() throws XMLStreamException {
+		checkElementState();
+		int eventType = getEventType();
+		String elementText = null;
+
+		if (eventType == START_ELEMENT) {
+			elementText = current.asStartElement().getName().getLocalPart();
+		} else if (eventType == END_ELEMENT) {
+			elementText = current.asEndElement().getName().getLocalPart();
+		}
+		return elementText;
+	}
+
+	public String getEncoding() {
+		return "UTF-8";
+	}
+
+	public int getEventType() {
+		return state;
+	}
+
+	public String getLocalName() {
+		checkElementState();
+		switch (current.getEventType()) {
+		case START_ELEMENT:
+			return current.asStartElement().getName().getLocalPart();
+		case END_ELEMENT:
+			return current.asEndElement().getName().getLocalPart();
+		}
+		return null;
+	}
+
+	public Location getLocation() {
+		return current.getLocation();
+	}
+
+	public QName getName() {
+		checkElementState();
+		switch (current.getEventType()) {
+		case START_ELEMENT:
+			return current.asStartElement().getName();
+		case END_ELEMENT:
+			return current.asEndElement().getName();
+		}
+		return null;
+	}
+
+	public NamespaceContext getNamespaceContext() {
+		checkElementState();
+		//return new TuscanyNamespaceContext(eventContext.get(getLocalName()));
+		return eventContext.get(getLocalName());
+	}
+
+	@SuppressWarnings("unchecked")
+	public int getNamespaceCount() {
+		int count = 0;
+		Iterator<Namespace> itr = current.asStartElement().getNamespaces();
+		while (itr.hasNext()) {
+			count++;
+			itr.next();
+		}
+		return count;
+	}
+
+	@SuppressWarnings("unchecked")
+	public String getNamespacePrefix(int index) {
+		Iterator<Namespace> itr = current.asStartElement().getNamespaces();
+		int level = 0;
+		Namespace ns = null;
+		while (itr.hasNext()) {
+			ns = itr.next();
+			if (level == index) {
+				return ns.getPrefix();
+			}
+			level++;
+		}
+		return null;
+	}
+
+	public String getNamespaceURI() {
+		checkElementState();
+		switch (current.getEventType()) {
+		case START_ELEMENT:
+			return current.asStartElement().getName().getNamespaceURI();
+		case END_ELEMENT:
+			return current.asEndElement().getName().getNamespaceURI();
+		}
+		return null;
+	}
+
+	public String getNamespaceURI(String prefix) {
+		return getNamespaceContext().getNamespaceURI(prefix);
+	}
+
+	@SuppressWarnings("unchecked")
+	public String getNamespaceURI(int index) {
+		Iterator<Namespace> itr = current.asStartElement().getNamespaces();
+		int level = 0;
+		Namespace ns = null;
+		while (itr.hasNext()) {
+			ns = itr.next();
+			if (level == index) {
+				return ns.getNamespaceURI();
+			}
+			level++;
+		}
+		return null;
+	}
+
+	public String getPIData() {
+		if (current.isProcessingInstruction()) {
+			ProcessingInstruction pi = (ProcessingInstruction) current;
+			return pi.getData();
+		} else {
+			throw new IllegalStateException(current.toString());
+		}
+	}
+
+	public String getPITarget() {
+		if (current.isProcessingInstruction()) {
+			ProcessingInstruction pi = (ProcessingInstruction) current;
+			return pi.getTarget();
+		} else {
+			throw new IllegalStateException(current.toString());
+		}
+	}
+
+	public String getPrefix() {
+		checkElementState();
+		if (current.isStartElement()) {
+			return current.asStartElement().getName().getPrefix();
+		}
+		return null;
+	}
+
+	/*
+	 * FIXME: Implementation pending... 
+	 * 
+	 * @see (non-Javadoc)
+	 * javax.xml.stream.util.StreamReaderDelegate#getProperty(java.lang.String)
+	 */
+	public Object getProperty(String name) throws IllegalArgumentException {
+		// TODO Auto-generated method stub
+
+		return null;
+	}
+
+	public String getText() {
+		if (current.isCharacters()) {
+			return current.asCharacters().getData();
+		} else {
+			throw new IllegalStateException(current.toString());
+		}
+	}
+
+	public char[] getTextCharacters() {
+		if (current.isCharacters()) {
+			return current.asCharacters().getData().toCharArray();
+		} else {
+			throw new IllegalStateException(current.toString());
+		}
+	}
+
+	/*
+	 * FIXME: Implementation pending... (non-Javadoc)
+	 * 
+	 * @see javax.xml.stream.util.StreamReaderDelegate#getTextCharacters(int,
+	 * char[], int, int)
+	 */
+	public int getTextCharacters(int sourceStart, char[] target,
+			int targetStart, int length) throws XMLStreamException {
+		// TODO Auto-generated method stub
+		return 0;
+	}
+
+	/*
+	 * FIXME:Implementaion can be improved (non-Javadoc)
+	 * 
+	 * @see javax.xml.stream.util.StreamReaderDelegate#getTextLength()
+	 */
+	public int getTextLength() {
+		if (current.isCharacters()) {
+			return current.asCharacters().getData().length();
+		} else {
+			throw new IllegalStateException(current.toString());
+		}
+	}
+
+	/*
+	 * FIXME: Implementation pending... (non-Javadoc)
+	 * 
+	 * @see javax.xml.stream.util.StreamReaderDelegate#getTextStart()
+	 */
+	public int getTextStart() {
+		// TODO Auto-generated method stub
+		return 0;
+	}
+
+	/*
+	 * FIXME: Implementation pending... (non-Javadoc)
+	 * 
+	 * @see javax.xml.stream.util.StreamReaderDelegate#getTextStart()
+	 */
+	public String getVersion() {
+		// TODO Auto-generated method stub
+
+		return null;
+	}
+
+	public boolean hasName() {
+		return false;
+	}
+
+	public boolean hasNext() throws XMLStreamException {
+		return iterator.hasNext() || state != END_DOCUMENT;
+
+	}
+
+	public boolean hasText() {
+		// TODO Auto-generated method stub
+		return false;
+	}
+
+	/*
+	 * FIXME: Implementation pending... (non-Javadoc)
+	 * 
+	 * @see javax.xml.stream.util.StreamReaderDelegate#getTextStart()
+	 */
+	public boolean isAttributeSpecified(int index) {
+		// TODO Auto-generated method stub
+		return false;
+	}
+
+	public boolean isCharacters() {
+		return current.isCharacters();
+	}
+
+	public boolean isEndElement() {
+		return current.isEndElement();
+	}
+
+	public boolean isStandalone() {
+		// TODO Auto-generated method stub
+		return false;
+	}
+
+	public boolean isStartElement() {
+		return current.isStartElement();
+	}
+
+	public boolean isWhiteSpace() {
+		// TODO Auto-generated method stub
+		return false;
+	}
+
+	public int next() throws XMLStreamException {
+		if (!hasNext()) {
+			throw new IllegalStateException("No more events");
+		}
+		if (!iterator.hasNext()) {
+			state = END_DOCUMENT;
+			current = null;
+			return state;
+		}
+		current = iterator.next();
+		state = current.getEventType();
+		return state;
+	}
+
+	public int nextTag() throws XMLStreamException {
+		return iterator.next().getEventType();
+	}
+
+	public void require(int type, String namespaceURI, String localName)
+			throws XMLStreamException {
+		boolean require = false;
+		String uri = getNamespaceURI();
+		String name = getLocalName();
+		if (state == type && namespaceURI.equals(uri) && localName.equals(name)) {
+			require = true;
+		}
+		if (require != true) {
+			throw new XMLStreamException();
+		}
+	}
+
+	public boolean standaloneSet() {
+		return false;
+	}
+
+}
diff --git a/sandbox/ant/sca/trunk/modules/contribution-xml/src/main/java/org/apache/tuscany/sca/contribution/processor/xml/XMLFragmentStreamReader.java b/sandbox/ant/sca/trunk/modules/contribution-xml/src/main/java/org/apache/tuscany/sca/contribution/processor/xml/XMLFragmentStreamReader.java
new file mode 100644
index 0000000000..66361e1d76
--- /dev/null
+++ b/sandbox/ant/sca/trunk/modules/contribution-xml/src/main/java/org/apache/tuscany/sca/contribution/processor/xml/XMLFragmentStreamReader.java
@@ -0,0 +1,53 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.contribution.processor.xml;
+
+import javax.xml.namespace.NamespaceContext;
+import javax.xml.namespace.QName;
+import javax.xml.stream.XMLStreamReader;
+
+public interface XMLFragmentStreamReader extends XMLStreamReader {
+    QName NIL_QNAME = new QName("http://www.w3.org/2001/XMLSchema-instance", "nil", "xsi");
+    String NIL_VALUE_TRUE = "true";
+
+    /**
+     * this will help to handle Text within the current element. user should
+     * pass the element text to the property list as this ELEMENT_TEXT as the
+     * key. This key deliberately has a space in it so that it is not a valid
+     * XML name
+     */
+    String ELEMENT_TEXT = "Element Text";
+
+    /**
+     * Extra method to query the state of the pullparser
+     */
+    boolean isDone();
+
+    /**
+     * add the parent namespace context to this parser
+     */
+    void setParentNamespaceContext(NamespaceContext nsContext);
+
+    /**
+     * Initiate the parser - this will do whatever the needed tasks to initiate
+     * the parser and must be called before attempting any specific parsing
+     * using this parser
+     */
+    void init();
+}
diff --git a/sandbox/ant/sca/trunk/modules/contribution-xml/src/main/java/org/apache/tuscany/sca/contribution/xml/ContributionGeneratedMetadataDocumentProcessor.java b/sandbox/ant/sca/trunk/modules/contribution-xml/src/main/java/org/apache/tuscany/sca/contribution/xml/ContributionGeneratedMetadataDocumentProcessor.java
new file mode 100644
index 0000000000..ff7bf7068a
--- /dev/null
+++ b/sandbox/ant/sca/trunk/modules/contribution-xml/src/main/java/org/apache/tuscany/sca/contribution/xml/ContributionGeneratedMetadataDocumentProcessor.java
@@ -0,0 +1,50 @@
+/*
+ * 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.processor.StAXArtifactProcessor;
+import org.apache.tuscany.sca.core.FactoryExtensionPoint;
+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(FactoryExtensionPoint modelFactories, 
+    													  StAXArtifactProcessor staxProcessor,
+    													  Monitor monitor) {
+        super(modelFactories, staxProcessor, monitor);
+    }
+
+    @Override
+    public String getArtifactType() {
+        return "sca-contribution-generated.xml";
+    }
+}
diff --git a/sandbox/ant/sca/trunk/modules/contribution-xml/src/main/java/org/apache/tuscany/sca/contribution/xml/ContributionMetadataDocumentProcessor.java b/sandbox/ant/sca/trunk/modules/contribution-xml/src/main/java/org/apache/tuscany/sca/contribution/xml/ContributionMetadataDocumentProcessor.java
new file mode 100644
index 0000000000..f080f23797
--- /dev/null
+++ b/sandbox/ant/sca/trunk/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.contribution.ContributionMetadata;
+import org.apache.tuscany.sca.contribution.processor.ContributionReadException;
+import org.apache.tuscany.sca.contribution.processor.ContributionResolveException;
+import org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor;
+import org.apache.tuscany.sca.contribution.processor.URLArtifactProcessor;
+import org.apache.tuscany.sca.contribution.processor.ValidatingXMLInputFactory;
+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;
+
+/**
+ * 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(FactoryExtensionPoint modelFactories,
+                                                 StAXArtifactProcessor staxProcessor,
+                                                 Monitor monitor) {
+        this.inputFactory = modelFactories.getFactory(ValidatingXMLInputFactory.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 = monitor.createProblem(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/sandbox/ant/sca/trunk/modules/contribution-xml/src/main/java/org/apache/tuscany/sca/contribution/xml/ContributionMetadataProcessor.java b/sandbox/ant/sca/trunk/modules/contribution-xml/src/main/java/org/apache/tuscany/sca/contribution/xml/ContributionMetadataProcessor.java
new file mode 100644
index 0000000000..804af17719
--- /dev/null
+++ b/sandbox/ant/sca/trunk/modules/contribution-xml/src/main/java/org/apache/tuscany/sca/contribution/xml/ContributionMetadataProcessor.java
@@ -0,0 +1,221 @@
+/*
+ * 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.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.processor.BaseStAXArtifactProcessor;
+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;
+
+/**
+ * Processor for contribution metadata
+ * 
+ * @version $Rev$ $Date$
+ */
+public class ContributionMetadataProcessor extends BaseStAXArtifactProcessor implements StAXArtifactProcessor<ContributionMetadata> {
+    private static final String SCA11_NS = "http://docs.oasis-open.org/ns/opencsa/sca/200903";
+    
+    private static final QName CONTRIBUTION_QNAME = new QName(SCA11_NS, "contribution");
+    private static final QName DEPLOYABLE_QNAME = new QName(SCA11_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 = monitor.createProblem(this.getClass().getName(), "contribution-xml-validation-messages", Severity.ERROR, model, message, (Object[])messageParameters);
+	        monitor.problem(problem);
+    	 }
+     }
+     
+    public ContributionMetadataProcessor(FactoryExtensionPoint 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 {
+        ContributionMetadata contribution = null;
+        QName name = null;
+        
+        try {
+            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();
+                }
+            }
+        }
+        catch (XMLStreamException e) {
+            ContributionReadException ex = new ContributionReadException(e);
+            error("XMLStreamException", reader, ex);
+        }
+        
+        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/sandbox/ant/sca/trunk/modules/contribution-xml/src/main/java/org/apache/tuscany/sca/contribution/xml/ContributionModelResolver.java b/sandbox/ant/sca/trunk/modules/contribution-xml/src/main/java/org/apache/tuscany/sca/contribution/xml/ContributionModelResolver.java
new file mode 100644
index 0000000000..ddc768b61c
--- /dev/null
+++ b/sandbox/ant/sca/trunk/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.resolver.ModelResolver;
+import org.apache.tuscany.sca.core.FactoryExtensionPoint;
+
+/**
+ * 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, FactoryExtensionPoint 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/sandbox/ant/sca/trunk/modules/contribution-xml/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor b/sandbox/ant/sca/trunk/modules/contribution-xml/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor
new file mode 100644
index 0000000000..4c7416d38e
--- /dev/null
+++ b/sandbox/ant/sca/trunk/modules/contribution-xml/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor
@@ -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.ContributionMetadataProcessor;qname=http://docs.oasis-open.org/ns/opencsa/sca/200903#contribution,model=org.apache.tuscany.sca.contribution.ContributionMetadata
+org.apache.tuscany.sca.contribution.processor.xml.AnyElementProcessor;qname=http://www.w3.org/2001/XMLSchema#anyElement,model=java.lang.Object
diff --git a/sandbox/ant/sca/trunk/modules/contribution-xml/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.processor.StAXAttributeProcessor b/sandbox/ant/sca/trunk/modules/contribution-xml/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.processor.StAXAttributeProcessor
new file mode 100644
index 0000000000..b4a13295bc
--- /dev/null
+++ b/sandbox/ant/sca/trunk/modules/contribution-xml/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.processor.StAXAttributeProcessor
@@ -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 attribute processor extension
+org.apache.tuscany.sca.contribution.processor.xml.AnyAttributeProcessor;qname=http://www.w3.org/2001/XMLSchema#anyAttribute,model=org.apache.tuscany.sca.assembly.Extension
diff --git a/sandbox/ant/sca/trunk/modules/contribution-xml/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.processor.URLArtifactProcessor b/sandbox/ant/sca/trunk/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/sandbox/ant/sca/trunk/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/sandbox/ant/sca/trunk/modules/contribution-xml/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.resolver.ModelResolver b/sandbox/ant/sca/trunk/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/sandbox/ant/sca/trunk/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/sandbox/ant/sca/trunk/modules/contribution-xml/src/main/resources/contribution-xml-validation-messages.properties b/sandbox/ant/sca/trunk/modules/contribution-xml/src/main/resources/contribution-xml-validation-messages.properties
new file mode 100644
index 0000000000..4827fd5e94
--- /dev/null
+++ b/sandbox/ant/sca/trunk/modules/contribution-xml/src/main/resources/contribution-xml-validation-messages.properties
@@ -0,0 +1,24 @@
+#
+#
+#    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 : {0}
+IOException = IOException occured due to : {0}
+AttributeCompositeMissing = Attribute 'composite' is missing
+