Moving current trunk modules to contrib, before starting the Equinox branch merge

git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@718812 13f79535-47bb-0310-9956-ffa450edef68

11 files changed, 885 insertions, 0 deletions

diff --git a/java/sca/contrib/modules/implementation-widget/LICENSE b/java/sca/contrib/modules/implementation-widget/LICENSE
new file mode 100644
index 0000000000..8aa906c321
--- /dev/null
+++ b/java/sca/contrib/modules/implementation-widget/LICENSE
@@ -0,0 +1,205 @@
+
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+                           Version 2.0, January 2004
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+
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+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
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+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
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+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
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+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
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+      Work and such Derivative Works in Source or Object form.
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+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
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+      (d) If the Work includes a "NOTICE" text file as part of its
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+          of the NOTICE file are for informational purposes only and
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+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
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+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
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+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
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diff --git a/java/sca/contrib/modules/implementation-widget/NOTICE b/java/sca/contrib/modules/implementation-widget/NOTICE
new file mode 100644
index 0000000000..fdfa0e9faa
--- /dev/null
+++ b/java/sca/contrib/modules/implementation-widget/NOTICE
@@ -0,0 +1,6 @@
+${pom.name}
+Copyright (c) 2005 - 2008 The Apache Software Foundation
+
+This product includes software developed by
+The Apache Software Foundation (http://www.apache.org/).
+
diff --git a/java/sca/contrib/modules/implementation-widget/pom.xml b/java/sca/contrib/modules/implementation-widget/pom.xml
new file mode 100644
index 0000000000..98cfd880ea
--- /dev/null
+++ b/java/sca/contrib/modules/implementation-widget/pom.xml
@@ -0,0 +1,79 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+    * 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.    
+-->
+<project>
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>org.apache.tuscany.sca</groupId>
+        <artifactId>tuscany-modules</artifactId>
+        <version>2.0-SNAPSHOT</version>
+        <relativePath>../pom.xml</relativePath>
+    </parent>
+
+    <artifactId>tuscany-implementation-widget</artifactId>
+    <name>Apache Tuscany SCA Widget Implementation Model</name>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.apache.tuscany.sca</groupId>
+            <artifactId>tuscany-assembly-xml</artifactId>
+            <version>2.0-SNAPSHOT</version>
+        </dependency>
+
+        <dependency>
+            <groupId>org.apache.tuscany.sca</groupId>
+            <artifactId>tuscany-interface-java</artifactId>
+            <version>2.0-SNAPSHOT</version>
+        </dependency>        
+
+        <dependency>
+            <groupId>org.apache.tuscany.sca</groupId>
+            <artifactId>tuscany-data-api</artifactId>
+            <version>2.0-SNAPSHOT</version>
+        </dependency>        
+
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>4.5</version>
+            <scope>test</scope>
+        </dependency>
+
+    </dependencies>
+
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.felix</groupId>
+                <artifactId>maven-bundle-plugin</artifactId>
+
+                <configuration>
+                    <instructions>
+                        <Bundle-Version>${tuscany.version}</Bundle-Version>
+                        <Bundle-SymbolicName>org.apache.tuscany.sca.implementation.widget</Bundle-SymbolicName>
+                        <Bundle-Description>${pom.name}</Bundle-Description>
+                        <Export-Package>org.apache.tuscany.sca.implementation.widget*</Export-Package>
+                    </instructions>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>
diff --git a/java/sca/contrib/modules/implementation-widget/src/main/java/org/apache/tuscany/sca/implementation/widget/Widget.java b/java/sca/contrib/modules/implementation-widget/src/main/java/org/apache/tuscany/sca/implementation/widget/Widget.java
new file mode 100644
index 0000000000..f47850a05c
--- /dev/null
+++ b/java/sca/contrib/modules/implementation-widget/src/main/java/org/apache/tuscany/sca/implementation/widget/Widget.java
@@ -0,0 +1,34 @@
+/*
+ * 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.implementation.widget;
+
+import java.io.InputStream;
+
+import org.apache.tuscany.sca.data.collection.Collection;
+
+/**
+ * The service interface of widget implementations. This is not an API for application
+ * developers. Application developers should use the data collection API to invoke
+ * widget components.
+ * 
+ * @version $Rev$ $Date$
+ */
+public interface Widget extends Collection<String, InputStream> {
+}
diff --git a/java/sca/contrib/modules/implementation-widget/src/main/java/org/apache/tuscany/sca/implementation/widget/WidgetImplementation.java b/java/sca/contrib/modules/implementation-widget/src/main/java/org/apache/tuscany/sca/implementation/widget/WidgetImplementation.java
new file mode 100644
index 0000000000..b35cc41dd4
--- /dev/null
+++ b/java/sca/contrib/modules/implementation-widget/src/main/java/org/apache/tuscany/sca/implementation/widget/WidgetImplementation.java
@@ -0,0 +1,134 @@
+/*
+ * 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.implementation.widget;
+
+import java.net.URL;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+import org.apache.tuscany.sca.assembly.AssemblyFactory;
+import org.apache.tuscany.sca.assembly.ConstrainingType;
+import org.apache.tuscany.sca.assembly.Implementation;
+import org.apache.tuscany.sca.assembly.Property;
+import org.apache.tuscany.sca.assembly.Reference;
+import org.apache.tuscany.sca.assembly.Service;
+import org.apache.tuscany.sca.interfacedef.InvalidInterfaceException;
+import org.apache.tuscany.sca.interfacedef.java.JavaInterface;
+import org.apache.tuscany.sca.interfacedef.java.JavaInterfaceContract;
+import org.apache.tuscany.sca.interfacedef.java.JavaInterfaceFactory;
+
+
+/**
+ * The model representing a widget implementation in an SCA assembly model.
+ *
+ * @version $Rev$ $Date$
+ */
+public class WidgetImplementation implements Implementation {
+    private Service widgetService;
+    private List<Reference> references = new ArrayList<Reference>();
+    private List<Property> properties = new ArrayList<Property>();
+    
+    private String location;
+    private URL url;
+    private boolean unresolved;
+
+    /**
+     * Constructs a new resource implementation.
+     */
+    WidgetImplementation(AssemblyFactory assemblyFactory,
+                         JavaInterfaceFactory javaFactory) {
+
+        // Resource implementation always provide a single service exposing
+        // the Resource interface, and have no references and properties
+        widgetService = assemblyFactory.createService();
+        widgetService.setName("Widget");
+        
+        // Create the Java interface contract for the Resource service
+        JavaInterface javaInterface;
+        try {
+            javaInterface = javaFactory.createJavaInterface(Widget.class);
+        } catch (InvalidInterfaceException e) {
+            throw new IllegalArgumentException(e);
+        }
+        JavaInterfaceContract interfaceContract = javaFactory.createJavaInterfaceContract();
+        interfaceContract.setInterface(javaInterface);
+        widgetService.setInterfaceContract(interfaceContract);
+    }
+
+    public String getLocation() {
+        return location;
+    }
+
+    public void setLocation(String location) {
+        this.location = location;
+    }
+
+    public URL getLocationURL() {
+        return url;
+    }
+    
+    public void setLocationURL(URL url) {
+        this.url = url;
+    }
+    
+    public ConstrainingType getConstrainingType() {
+        // The resource implementation does not support constrainingTypes
+        return null;
+    }
+
+    public List<Property> getProperties() {
+        return properties;
+    }
+
+    public List<Service> getServices() {
+        // The resource implementation does not support services
+        return Collections.singletonList(widgetService);
+    }
+    
+    public List<Reference> getReferences() {
+        return references;
+    }
+
+    public String getURI() {
+        return location;
+    }
+
+    public void setConstrainingType(ConstrainingType constrainingType) {
+        // The resource implementation does not support constrainingTypes
+    }
+
+    public void setURI(String uri) {
+        this.location = uri;
+    }
+
+
+    public boolean isUnresolved() {
+        return unresolved;
+    }
+
+    public void setUnresolved(boolean unresolved) {
+        this.unresolved = unresolved;
+    }    
+
+    @Override
+    public String toString() {
+        return "Widget : " + getLocation(); 
+    }
+}
diff --git a/java/sca/contrib/modules/implementation-widget/src/main/java/org/apache/tuscany/sca/implementation/widget/WidgetImplementationFactory.java b/java/sca/contrib/modules/implementation-widget/src/main/java/org/apache/tuscany/sca/implementation/widget/WidgetImplementationFactory.java
new file mode 100644
index 0000000000..2493b97f5c
--- /dev/null
+++ b/java/sca/contrib/modules/implementation-widget/src/main/java/org/apache/tuscany/sca/implementation/widget/WidgetImplementationFactory.java
@@ -0,0 +1,45 @@
+/*
+ * 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.implementation.widget;
+
+import org.apache.tuscany.sca.assembly.AssemblyFactory;
+import org.apache.tuscany.sca.contribution.ModelFactoryExtensionPoint;
+import org.apache.tuscany.sca.interfacedef.java.JavaInterfaceFactory;
+
+/**
+ * Factory for the widget implementation model.
+ *
+ * @version $Rev$ $Date$
+ */
+public class WidgetImplementationFactory {
+    
+    private AssemblyFactory assemblyFactory;
+    private JavaInterfaceFactory javaFactory;
+    
+    public WidgetImplementationFactory(ModelFactoryExtensionPoint modelFactories) {
+        assemblyFactory = modelFactories.getFactory(AssemblyFactory.class);
+        javaFactory = modelFactories.getFactory(JavaInterfaceFactory.class);
+    }
+
+    public WidgetImplementation createWidgetImplementation() {
+        return new WidgetImplementation(assemblyFactory, javaFactory);
+    }
+
+}
diff --git a/java/sca/contrib/modules/implementation-widget/src/main/java/org/apache/tuscany/sca/implementation/widget/WidgetImplementationIntrospector.java b/java/sca/contrib/modules/implementation-widget/src/main/java/org/apache/tuscany/sca/implementation/widget/WidgetImplementationIntrospector.java
new file mode 100644
index 0000000000..abe00bac5b
--- /dev/null
+++ b/java/sca/contrib/modules/implementation-widget/src/main/java/org/apache/tuscany/sca/implementation/widget/WidgetImplementationIntrospector.java
@@ -0,0 +1,145 @@
+/*
+ * 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.implementation.widget;
+
+import java.net.URL;
+import java.net.URLConnection;
+import java.util.Scanner;
+
+import org.apache.tuscany.sca.assembly.AssemblyFactory;
+import org.apache.tuscany.sca.assembly.Property;
+import org.apache.tuscany.sca.assembly.Reference;
+
+/**
+ *
+ * @version $Rev$ $Date$
+ */
+class WidgetImplementationIntrospector {
+    private static final String WEB_REFERENCE_ANNOTATION = "//@Reference";
+    private static final String WEB_PROPERTY_ANNOTATION = "//@Property";
+    
+    private AssemblyFactory assemblyFactory;
+    private WidgetImplementation widgetImplementation;
+    
+    WidgetImplementationIntrospector(AssemblyFactory assemblyFactory, WidgetImplementation widgetImplementation) {
+        this.widgetImplementation = widgetImplementation;
+        this.assemblyFactory = assemblyFactory;
+    }
+    
+    
+    /**
+     * Introspect and populate a given widget implementation
+     */
+    public void introspectImplementation() {
+        URL htmlWidget = widgetImplementation.getLocationURL();
+        
+        try {
+            URLConnection connection = htmlWidget.openConnection();
+            connection.setUseCaches(false);
+            Scanner scanner = new Scanner(connection.getInputStream());
+            while(scanner.hasNextLine()) {
+                String line = scanner.nextLine();
+                if(line.contains(WEB_PROPERTY_ANNOTATION)) {
+                	//process the next line, as it has the property info
+                	if (scanner.hasNextLine()) {
+                		Property property = processPropertyScript(scanner.nextLine());
+                		if (property != null) {
+                			widgetImplementation.getProperties().add(property);
+                		}
+                	}
+                	
+                } else if(line.contains(WEB_REFERENCE_ANNOTATION)) {
+                    //process the next line, as it has the reference info
+                    if (scanner.hasNextLine()) {
+                        Reference reference = processReferenceScript(scanner.nextLine());
+                        if(reference != null){
+                        	widgetImplementation.getReferences().add(reference);
+                        }
+                        
+                    }
+                }
+            }
+            
+        } catch(Exception e) {
+            
+        }
+        
+    	
+    }
+    
+    
+    /**
+     * Process Property declaration in JavaScript code
+     * Supported ways:
+     *    //@Property
+     *    var locale = Property("locale");
+     *    
+     *    //@Property
+     *    locale = Property("locale");
+     *    
+     * @param scriptContent
+     * @return
+     */
+    private Property processPropertyScript(String scriptContent) {
+    	Property property = null;
+        String propertyName = null;
+        
+        String tokens[] = scriptContent.split("=");
+        tokens = tokens[0].split(" ");
+        propertyName = tokens[tokens.length -1];
+        
+        if(propertyName != null) {
+            property = assemblyFactory.createProperty();
+            property.setName(propertyName);     
+        }
+        
+        return property;
+    }
+    
+    /**
+     * Process Reference declaration in JavaScript code
+     * Supported ways :
+     *    //@Reference
+     *    var catalog = new Reference("catalog");
+     *    
+     *    //@Reference
+     *    catalog = new Reference("catalog");
+     *    
+     * @param scriptContent
+     * @return
+     */
+    private Reference processReferenceScript(String scriptContent) {
+        Reference reference = null;
+        String referenceName = null;
+        
+        String tokens[] = scriptContent.split("=");
+        
+        // find the string between the quotes
+        tokens = tokens[1].split("\"");
+        referenceName = tokens[1];
+        
+        if(referenceName != null) {
+            reference = assemblyFactory.createReference();
+            reference.setName(referenceName);            
+        }
+        
+        return reference;
+    }
+}
diff --git a/java/sca/contrib/modules/implementation-widget/src/main/java/org/apache/tuscany/sca/implementation/widget/WidgetImplementationProcessor.java b/java/sca/contrib/modules/implementation-widget/src/main/java/org/apache/tuscany/sca/implementation/widget/WidgetImplementationProcessor.java
new file mode 100644
index 0000000000..bd91dd7632
--- /dev/null
+++ b/java/sca/contrib/modules/implementation-widget/src/main/java/org/apache/tuscany/sca/implementation/widget/WidgetImplementationProcessor.java
@@ -0,0 +1,176 @@
+/*
+ * 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.implementation.widget;
+
+import static javax.xml.stream.XMLStreamConstants.END_ELEMENT;
+
+import java.io.IOException;
+import java.net.URL;
+
+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.builder.impl.ProblemImpl;
+import org.apache.tuscany.sca.assembly.xml.Constants;
+import org.apache.tuscany.sca.contribution.Artifact;
+import org.apache.tuscany.sca.contribution.ContributionFactory;
+import org.apache.tuscany.sca.contribution.ModelFactoryExtensionPoint;
+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;
+
+
+/**
+ * Implements a StAX artifact processor for Widget implementations.
+ *
+ * @version $Rev$ $Date$
+ */
+public class WidgetImplementationProcessor implements StAXArtifactProcessor<WidgetImplementation> {
+    private static final QName IMPLEMENTATION_WIDGET = new QName(Constants.SCA10_TUSCANY_NS, "implementation.widget");
+        
+    private AssemblyFactory assemblyFactory;
+    private ContributionFactory contributionFactory;
+    private WidgetImplementationFactory implementationFactory;
+    private Monitor monitor;
+    
+    public WidgetImplementationProcessor(ModelFactoryExtensionPoint modelFactories, Monitor monitor) {
+    	assemblyFactory = modelFactories.getFactory(AssemblyFactory.class);
+        contributionFactory = modelFactories.getFactory(ContributionFactory.class);
+        implementationFactory = new WidgetImplementationFactory(modelFactories); 
+        this.monitor = monitor;
+    }
+    
+    /**
+     * Report a exception.
+     * 
+     * @param problems
+     * @param message
+     * @param model
+     */
+    private void error(String message, Object model, Exception ex) {
+    	 if (monitor != null) {
+	        Problem problem = new ProblemImpl(this.getClass().getName(), "impl-widget-validation-messages", Severity.ERROR, model, message, ex);
+	        monitor.problem(problem);
+    	 }
+    }
+            
+    /**
+     * Report a error.
+     * 
+     * @param problems
+     * @param message
+     * @param model
+     */
+    private void error(String message, Object model, Object... messageParameters) {
+        if (monitor != null) {
+            Problem problem = new ProblemImpl(this.getClass().getName(), "impl-widget-validation-messages", Severity.ERROR, model, message, (Object[])messageParameters);
+            monitor.problem(problem);
+        }
+    }    
+
+    public QName getArtifactType() {
+        // Returns the QName of the XML element processed by this processor
+        return IMPLEMENTATION_WIDGET;
+    }
+
+    public Class<WidgetImplementation> getModelType() {
+        // Returns the type of model processed by this processor
+        return WidgetImplementation.class;
+    }
+
+    public WidgetImplementation read(XMLStreamReader reader) throws ContributionReadException, XMLStreamException {
+
+        // Read an <implementation.widget> element
+
+        // Create and initialize the resource implementation model
+        WidgetImplementation implementation = null;
+
+        // Read the location attribute specifying the location of the resources
+        String location = reader.getAttributeValue(null, "location");
+        if (location != null) {                
+            implementation = implementationFactory.createWidgetImplementation();
+            implementation.setLocation(location);
+            implementation.setUnresolved(true);
+        } else {
+            error("LocationAttributeMissing", reader);
+            //throw new ContributionReadException(MSG_LOCATION_MISSING);
+        }
+
+        // Skip to end element
+        while (reader.hasNext()) {
+            if (reader.next() == END_ELEMENT && IMPLEMENTATION_WIDGET.equals(reader.getName())) {
+                break;
+            }
+        }
+
+        return implementation;
+    }
+
+    public void resolve(WidgetImplementation implementation, ModelResolver resolver) throws ContributionResolveException {
+        
+    	if (implementation != null) {
+    		// Resolve the resource directory location
+            Artifact artifact = contributionFactory.createArtifact();
+            artifact.setURI(implementation.getLocation());
+            Artifact resolved = resolver.resolveModel(Artifact.class, artifact);
+            if (resolved.getLocation() != null) {
+                try {
+                    implementation.setLocationURL(new URL(resolved.getLocation()));                 
+                    
+                    //introspect implementation
+                    WidgetImplementationIntrospector widgetIntrospector = 
+                    	new WidgetImplementationIntrospector(assemblyFactory, implementation);
+                    widgetIntrospector.introspectImplementation();
+                    
+                    implementation.setUnresolved(false);
+                } catch (IOException e) {
+                	ContributionResolveException ce = new ContributionResolveException(e);
+                	error("ContributionResolveException", resolver, ce);
+                    //throw ce;
+                }
+            } else {
+                error("CouldNotResolveLocation", resolver, implementation.getLocation());
+                //throw new ContributionResolveException("Could not resolve implementation.widget location: " + implementation.getLocation());            
+            }
+    	}
+    }
+
+    public void write(WidgetImplementation implementation, XMLStreamWriter writer) throws ContributionWriteException, XMLStreamException {
+        
+        // Write <implementation.widget>
+        writer.setPrefix("widget",IMPLEMENTATION_WIDGET.getNamespaceURI());
+        writer.writeStartElement(IMPLEMENTATION_WIDGET.getNamespaceURI(), IMPLEMENTATION_WIDGET.getLocalPart());
+        writer.writeNamespace("widget",IMPLEMENTATION_WIDGET.getNamespaceURI());
+      
+        
+        if (implementation.getLocation() != null) {
+            writer.writeAttribute("location", implementation.getLocation());
+        }
+        
+        writer.writeEndElement();
+    }
+}
diff --git a/java/sca/contrib/modules/implementation-widget/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor b/java/sca/contrib/modules/implementation-widget/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor
new file mode 100644
index 0000000000..6c167a6b31
--- /dev/null
+++ b/java/sca/contrib/modules/implementation-widget/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor
@@ -0,0 +1,19 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+# 
+#   http://www.apache.org/licenses/LICENSE-2.0
+# 
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License. 
+
+# Implementation class for the artifact processor extension
+org.apache.tuscany.sca.implementation.widget.WidgetImplementationProcessor;qname=http://tuscany.apache.org/xmlns/sca/1.0#implementation.widget,model=org.apache.tuscany.sca.implementation.widget.WidgetImplementation
diff --git a/java/sca/contrib/modules/implementation-widget/src/main/resources/META-INF/services/org.apache.tuscany.sca.implementation.widget.WidgetImplementationFactory b/java/sca/contrib/modules/implementation-widget/src/main/resources/META-INF/services/org.apache.tuscany.sca.implementation.widget.WidgetImplementationFactory
new file mode 100644
index 0000000000..fc45baa16d
--- /dev/null
+++ b/java/sca/contrib/modules/implementation-widget/src/main/resources/META-INF/services/org.apache.tuscany.sca.implementation.widget.WidgetImplementationFactory
@@ -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 model factory
+org.apache.tuscany.sca.implementation.widget.WidgetImplementationFactory
diff --git a/java/sca/contrib/modules/implementation-widget/src/main/resources/impl-widget-validation-messages.properties b/java/sca/contrib/modules/implementation-widget/src/main/resources/impl-widget-validation-messages.properties
new file mode 100644
index 0000000000..3778bd4c50
--- /dev/null
+++ b/java/sca/contrib/modules/implementation-widget/src/main/resources/impl-widget-validation-messages.properties
@@ -0,0 +1,23 @@
+#
+#
+#    Licensed to the Apache Software Foundation (ASF) under one
+#    or more contributor license agreements. See the NOTICE file
+#    distributed with this work for additional information
+#    regarding copyright ownership. The ASF licenses this file
+#    to you under the Apache License, Version 2.0 (the
+#    "License"); you may not use this file except in compliance
+#    with the License. You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing,
+#    software distributed under the License is distributed on an
+#    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+#    KIND, either express or implied. See the License for the
+#    specific language governing permissions and limitations
+#    under the License.
+#
+#
+ContributionResolveException = ContributionResolveException occured due to:
+LocationAttributeMissing = Reading implementation.widget - location attribute missing
+CouldNotResolveLocation = Could not resolve implementation.widget location: {0}