Start porting Implementation Widget to 2.x

git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@835224 13f79535-47bb-0310-9956-ffa450edef68

11 files changed, 2583 insertions, 0 deletions

diff --git a/java/sca/modules/implementation-widget-runtime/LICENSE b/java/sca/modules/implementation-widget-runtime/LICENSE
new file mode 100644
index 0000000000..8aa906c321
--- /dev/null
+++ b/java/sca/modules/implementation-widget-runtime/LICENSE
@@ -0,0 +1,205 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      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.
+
+      "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."
+
+      "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.
+
+   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
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent 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
+      (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
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          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.
+
+      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
+      for any such Derivative Works as a whole, provided Your use,
+      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
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed 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.
+
+
+
diff --git a/java/sca/modules/implementation-widget-runtime/NOTICE b/java/sca/modules/implementation-widget-runtime/NOTICE
new file mode 100644
index 0000000000..25bb89c9b2
--- /dev/null
+++ b/java/sca/modules/implementation-widget-runtime/NOTICE
@@ -0,0 +1,6 @@
+${pom.name}
+Copyright (c) 2005 - 2009 The Apache Software Foundation
+
+This product includes software developed by
+The Apache Software Foundation (http://www.apache.org/).
+
diff --git a/java/sca/modules/implementation-widget-runtime/pom.xml b/java/sca/modules/implementation-widget-runtime/pom.xml
new file mode 100644
index 0000000000..778ea15851
--- /dev/null
+++ b/java/sca/modules/implementation-widget-runtime/pom.xml
@@ -0,0 +1,92 @@
+<?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>1.6-SNAPSHOT</version>
+        <relativePath>../pom.xml</relativePath>
+    </parent>
+
+    <artifactId>tuscany-implementation-widget-runtime</artifactId>
+    <name>Apache Tuscany SCA Widget Implementation Runtime</name>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.apache.tuscany.sca</groupId>
+            <artifactId>tuscany-implementation-widget</artifactId>
+            <version>1.6-SNAPSHOT</version>
+        </dependency>
+        
+        <dependency>
+            <groupId>org.apache.tuscany.sca</groupId>
+            <artifactId>tuscany-web-javascript</artifactId>
+            <version>1.6-SNAPSHOT</version>
+        </dependency>           
+
+        <dependency>
+            <groupId>org.apache.tuscany.sca</groupId>
+            <artifactId>tuscany-core-spi</artifactId>
+            <version>1.6-SNAPSHOT</version>
+        </dependency>
+
+        <dependency>
+            <groupId>org.apache.tuscany.sca</groupId>
+            <artifactId>tuscany-host-http</artifactId>
+            <version>1.6-SNAPSHOT</version>
+        </dependency>
+
+       <dependency>
+            <groupId>javax.servlet</groupId>
+            <artifactId>servlet-api</artifactId>
+            <version>2.4</version> <!-- to keep compatible with older servlet containers --> 
+            <scope>provided</scope>
+        </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.runtime</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/modules/implementation-widget-runtime/src/main/java/org/apache/tuscany/sca/implementation/widget/provider/WidgetComponentScriptGenerator.java b/java/sca/modules/implementation-widget-runtime/src/main/java/org/apache/tuscany/sca/implementation/widget/provider/WidgetComponentScriptGenerator.java
new file mode 100644
index 0000000000..33db45c7cd
--- /dev/null
+++ b/java/sca/modules/implementation-widget-runtime/src/main/java/org/apache/tuscany/sca/implementation/widget/provider/WidgetComponentScriptGenerator.java
@@ -0,0 +1,218 @@
+/*
+ * 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.provider;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.io.PrintWriter;
+import java.net.URISyntaxException;
+import java.util.HashMap;
+import java.util.Map;
+
+import org.apache.tuscany.sca.assembly.Binding;
+import org.apache.tuscany.sca.assembly.ComponentProperty;
+import org.apache.tuscany.sca.assembly.ComponentReference;
+import org.apache.tuscany.sca.runtime.RuntimeComponent;
+import org.apache.tuscany.sca.web.javascript.JavascriptProxyFactory;
+import org.apache.tuscany.sca.web.javascript.JavascriptProxyFactoryExtensionPoint;
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+
+/**
+ * This helper class concatenates the necessary JavaScript client code into a
+ * single JavaScript per component
+ * @version $Rev$ $Date$
+ */
+public class WidgetComponentScriptGenerator {
+    
+    public static InputStream generateWidgetCode(RuntimeComponent component, JavascriptProxyFactoryExtensionPoint javascriptProxyFactories) throws IOException, URISyntaxException {
+        ByteArrayOutputStream bos = new ByteArrayOutputStream();
+        PrintWriter pw = new PrintWriter(bos);
+     
+        generateWidgetCode(component, javascriptProxyFactories, pw);
+        
+        return new ByteArrayInputStream(bos.toByteArray());
+    }
+    
+    public static void generateWidgetCode(RuntimeComponent component, JavascriptProxyFactoryExtensionPoint javascriptProxyFactories, OutputStream os) throws IOException, URISyntaxException {
+        PrintWriter pw = new PrintWriter(os);
+        
+        generateWidgetCode(component, javascriptProxyFactories, pw);
+    }
+            
+
+    /**
+     * This helper class concatenates the necessary JavaScript client code into a
+     * single JavaScript per component
+     */
+    public static void generateWidgetCode(RuntimeComponent component, JavascriptProxyFactoryExtensionPoint javascriptProxyFactories, PrintWriter pw) throws IOException, URISyntaxException {
+        pw.println();
+        pw.println("/* Apache Tuscany SCA Widget header */");
+        pw.println();
+
+        Map<String, Boolean> bindingClientProcessed = new HashMap<String, Boolean>();
+
+        for(ComponentReference reference : component.getReferences()) {
+            for(Binding binding : reference.getBindings()) {
+                JavascriptProxyFactory jsProxyFactory = javascriptProxyFactories.getProxyFactory(binding.getClass());
+
+                String bindingProxyName = jsProxyFactory.getJavascriptProxyFile();
+                //check if binding client code was already processed and inject to the generated script
+                if(bindingProxyName != null) {
+                    Boolean processedFlag = bindingClientProcessed.get(bindingProxyName);
+                    if( processedFlag == null || processedFlag.booleanValue() == false) {
+                        generateJavaScriptBindingProxy(jsProxyFactory, pw);
+                        bindingClientProcessed.put(bindingProxyName, Boolean.TRUE);
+                    }
+                }
+
+            }
+        }
+
+        pw.println();
+        pw.println("/* Tuscany Reference/Property injection code */");
+        pw.println();
+
+        
+        //define tuscany.sca namespace
+        generateJavaScriptNamespace(pw);
+
+        pw.println();
+
+        //process properties
+        generateJavaScriptPropertyFunction(component, pw);
+
+        pw.println();
+
+        //process references
+        generateJavaScriptReferenceFunction(component, javascriptProxyFactories,pw);
+
+
+        pw.println();
+        pw.println("/** End of Apache Tuscany SCA Widget */");
+        pw.println();
+        pw.flush();
+        pw.close();
+
+        
+    }
+
+
+    /**
+     * Retrieve the binding proxy based on the bind name
+     * and embedded the JavaScript into this js
+     */
+    private static void generateJavaScriptBindingProxy(JavascriptProxyFactory javascriptProxyFactory, PrintWriter pw) throws IOException {
+        InputStream is = javascriptProxyFactory.getJavascriptProxyFileAsStream();
+        if (is != null) {
+            int i;
+            while ((i = is.read()) != -1) {
+                pw.write(i);
+            }           
+        }
+        
+        pw.println();
+        pw.println();
+    }
+
+    /**
+     * Generate the tuscany.sca namespace if not yet available
+     * @param pw
+     * @throws IOException
+     */
+    private static void generateJavaScriptNamespace(PrintWriter pw) throws IOException {
+        pw.println("if (!tuscany) { \n" +
+                        "var tuscany = {}; \n" +
+                        "}");
+        pw.println("if (!tuscany.sca) { \n" +
+                        "tuscany.sca = {}; \n" +
+                        "}");
+    }
+   
+    /**
+     * Generate JavaScript code to inject SCA Properties
+     * @param pw
+     * @throws IOException
+     */
+    private static void generateJavaScriptPropertyFunction(RuntimeComponent component, PrintWriter pw) throws IOException {        
+        pw.println("tuscany.sca.propertyMap = new String();");
+        for(ComponentProperty property : component.getProperties()) {
+            String propertyName = property.getName();
+
+            pw.println("tuscany.sca.propertyMap." + propertyName + " = \"" + getPropertyValue(property) + "\"");
+        }
+        
+        pw.println("tuscany.sca.Property = function (name) {");
+        pw.println("    return tuscany.sca.propertyMap[name];");
+        pw.println("}");
+    }
+    
+    /**
+     * Convert property value to String
+     * @param property
+     * @return
+     */
+    private static String getPropertyValue(ComponentProperty property) {
+        Document doc = (Document)property.getValue();
+        Element rootElement = doc.getDocumentElement();
+
+        String value = null;
+
+        //FIXME : Provide support for isMany and other property types
+
+        if (rootElement.getChildNodes().getLength() > 0) {
+            value = rootElement.getChildNodes().item(0).getTextContent();
+        }
+
+        return value;
+    }
+
+
+    
+    /**
+     * Generate JavaScript code to inject SCA References
+     * @param pw
+     * @throws IOException
+     */
+    private static void generateJavaScriptReferenceFunction (RuntimeComponent component, JavascriptProxyFactoryExtensionPoint javascriptProxyFactories, PrintWriter pw) throws IOException, URISyntaxException {
+        
+        pw.println("tuscany.sca.referenceMap = new Object();");
+        for(ComponentReference reference : component.getReferences()) {
+            Binding binding = reference.getBindings().get(0);
+           
+            if (binding != null) {
+
+                String referenceName = reference.getName();
+                JavascriptProxyFactory jsProxyFactory = javascriptProxyFactories.getProxyFactory(binding.getClass());
+                
+                pw.println("tuscany.sca.referenceMap." + referenceName + " = new " + jsProxyFactory.createJavascriptReference(reference) + ";");
+                
+            }
+        }
+        
+        pw.println("tuscany.sca.Reference = function (name) {");
+        pw.println("    return tuscany.sca.referenceMap[name];");
+        pw.println("}");
+    }
+
+}
diff --git a/java/sca/modules/implementation-widget-runtime/src/main/java/org/apache/tuscany/sca/implementation/widget/provider/WidgetComponentScriptServlet.java b/java/sca/modules/implementation-widget-runtime/src/main/java/org/apache/tuscany/sca/implementation/widget/provider/WidgetComponentScriptServlet.java
new file mode 100644
index 0000000000..a28e014b2e
--- /dev/null
+++ b/java/sca/modules/implementation-widget-runtime/src/main/java/org/apache/tuscany/sca/implementation/widget/provider/WidgetComponentScriptServlet.java
@@ -0,0 +1,62 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.implementation.widget.provider;
+
+import java.io.IOException;
+import java.io.PrintWriter;
+
+import javax.servlet.ServletOutputStream;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import org.apache.tuscany.sca.runtime.RuntimeComponent;
+import org.apache.tuscany.sca.web.javascript.ComponentJavaScriptGenerator;
+
+
+/**
+ * Servlet to handle requests for the widget component .js script.
+ * 
+ * @version $Rev$ $Date$
+ */
+public class WidgetComponentScriptServlet extends HttpServlet {
+    private static final long serialVersionUID = 2454705532282398190L;
+    
+    private transient ComponentJavaScriptGenerator javaScriptgenerator;
+    private transient RuntimeComponent component;
+    
+    
+    /**
+     * Constructor receiving the runtimeComponent reference that is going to be used to generate the widget client js
+     * @param component
+     */
+    public WidgetComponentScriptServlet(RuntimeComponent component, ComponentJavaScriptGenerator javaScriptgenerator) {
+        this.component = component;
+        this.javaScriptgenerator = javaScriptgenerator;
+    }
+    
+    @Override
+    public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
+        ServletOutputStream os = response.getOutputStream();
+        PrintWriter pw = new PrintWriter(os);
+
+        javaScriptgenerator.generateJavaScriptCode(component, pw);
+    }
+}
diff --git a/java/sca/modules/implementation-widget-runtime/src/main/java/org/apache/tuscany/sca/implementation/widget/provider/WidgetImplementationInvoker.java b/java/sca/modules/implementation-widget-runtime/src/main/java/org/apache/tuscany/sca/implementation/widget/provider/WidgetImplementationInvoker.java
new file mode 100644
index 0000000000..28a1f6d1db
--- /dev/null
+++ b/java/sca/modules/implementation-widget-runtime/src/main/java/org/apache/tuscany/sca/implementation/widget/provider/WidgetImplementationInvoker.java
@@ -0,0 +1,101 @@
+/*
+ * 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.provider;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.PrintWriter;
+import java.net.MalformedURLException;
+import java.net.URL;
+
+import org.apache.tuscany.sca.invocation.Invoker;
+import org.apache.tuscany.sca.invocation.Message;
+import org.apache.tuscany.sca.runtime.RuntimeComponent;
+import org.apache.tuscany.sca.web.javascript.ComponentJavaScriptGenerator;
+
+
+/**
+ * Implements an invoker for resource component implementations.
+ *
+ * @version $Rev$ $Date$
+ */
+class WidgetImplementationInvoker implements Invoker {
+    private RuntimeComponent component;
+    private ComponentJavaScriptGenerator javaScriptGenerator;
+    private String widgetName;
+    private String widgetFolderURL;
+    private String widgetLocationURL;
+    
+    WidgetImplementationInvoker(RuntimeComponent component, ComponentJavaScriptGenerator javaScriptGenerator, String widgetName, String widgetFolderURL, String widgetLocationURL) {
+        this.component = component;
+        this.javaScriptGenerator = javaScriptGenerator;
+        this.widgetName = widgetName + ".js";
+        this.widgetFolderURL = widgetFolderURL;
+        this.widgetLocationURL = widgetLocationURL;
+    }
+    
+    public Message invoke(Message msg) {
+        
+        // Get the resource id from the request message
+        String id = (String)((Object[])msg.getBody())[0];
+        try {
+            
+            if (id.length() == 0) {
+
+                // Return an input stream for the widget resource
+                URL url = new URL(widgetLocationURL);
+                InputStream is = url.openStream();
+                msg.setBody(is);
+                
+            } else if (id.equals(widgetName)) {
+                
+                // Generate JavaScript header for use in the Widget
+                ByteArrayOutputStream bos = new ByteArrayOutputStream();
+                PrintWriter pw = new PrintWriter(bos);
+             
+                javaScriptGenerator.generateJavaScriptCode(component, pw);
+                
+                InputStream is = new ByteArrayInputStream(bos.toByteArray());
+                
+                msg.setBody(is);
+                
+            } else {
+
+                // Return an input stream for a resource inside the
+                // widget folder
+                URL url = new URL(widgetFolderURL +'/' + id);
+                InputStream is = url.openStream();
+                msg.setBody(is);
+            }
+        } catch (MalformedURLException e) {
+
+            // Report exception as a fault
+            msg.setFaultBody(e);
+            
+        } catch (IOException e) {
+
+            // Report exception as a fault
+            msg.setFaultBody(e);
+        }
+        return msg;
+    }
+}
diff --git a/java/sca/modules/implementation-widget-runtime/src/main/java/org/apache/tuscany/sca/implementation/widget/provider/WidgetImplementationProvider.java b/java/sca/modules/implementation-widget-runtime/src/main/java/org/apache/tuscany/sca/implementation/widget/provider/WidgetImplementationProvider.java
new file mode 100644
index 0000000000..08f2fbe679
--- /dev/null
+++ b/java/sca/modules/implementation-widget-runtime/src/main/java/org/apache/tuscany/sca/implementation/widget/provider/WidgetImplementationProvider.java
@@ -0,0 +1,126 @@
+/*
+ * 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.provider;
+
+import java.net.URI;
+
+import javax.servlet.Servlet;
+
+import org.apache.tuscany.sca.assembly.ComponentService;
+import org.apache.tuscany.sca.host.http.ServletHost;
+import org.apache.tuscany.sca.implementation.widget.WidgetImplementation;
+import org.apache.tuscany.sca.interfacedef.Operation;
+import org.apache.tuscany.sca.invocation.Invoker;
+import org.apache.tuscany.sca.provider.ImplementationProvider;
+import org.apache.tuscany.sca.runtime.RuntimeComponent;
+import org.apache.tuscany.sca.runtime.RuntimeComponentService;
+import org.apache.tuscany.sca.web.javascript.ComponentJavaScriptGenerator;
+
+
+/**
+ * The model representing a resource implementation in an SCA assembly model.
+ *
+ * @version $Rev$ $Date$
+ */
+class WidgetImplementationProvider implements ImplementationProvider {
+    
+    private RuntimeComponent component;
+    
+    private ComponentJavaScriptGenerator javaScriptGenerator;
+    private ServletHost servletHost;
+    
+    private String widgetLocationURL;
+    private String widgetFolderURL;
+    private String widgetName;
+    
+    private String scriptURI;
+
+    /**
+     * Constructs a new resource implementation provider.
+     */
+    WidgetImplementationProvider(RuntimeComponent component, 
+                                 WidgetImplementation implementation, 
+                                 ComponentJavaScriptGenerator javaScriptGenerator, 
+                                 ServletHost servletHost) {
+        this.component = component;
+        
+        this.javaScriptGenerator = javaScriptGenerator;
+        this.servletHost = servletHost;
+        
+        widgetLocationURL = implementation.getLocationURL().toString();
+        int s = widgetLocationURL.lastIndexOf('/');
+        widgetFolderURL = widgetLocationURL.substring(0, s);
+        widgetName = widgetLocationURL.substring(s +1);
+        widgetName = widgetName.substring(0, widgetName.lastIndexOf('.'));
+    }
+
+    public Invoker createInvoker(RuntimeComponentService service, Operation operation) {
+        WidgetImplementationInvoker invoker = new WidgetImplementationInvoker(component, javaScriptGenerator, widgetName, widgetFolderURL, widgetLocationURL);
+        return invoker;
+    }
+    
+    public boolean supportsOneWayInvocation() {
+        return false;
+    }
+
+    public void start() {
+        String contextRoot = getContextRoot();
+
+        // get the ScaDomainScriptServlet, if it doesn't yet exist create one
+        // this uses removeServletMapping / addServletMapping as there is no getServletMapping facility
+        scriptURI = URI.create(contextRoot + "/" + this.widgetName + ".js").toString();
+        Servlet servlet = servletHost.getServletMapping(scriptURI);
+        if (servlet == null /*|| servlet instanceof HTTPGetListenerServlet*/) {
+            WidgetComponentScriptServlet widgetScriptServlet;
+            widgetScriptServlet = new WidgetComponentScriptServlet(this.component, javaScriptGenerator);
+            servletHost.addServletMapping(scriptURI, widgetScriptServlet);
+        }     
+    }
+
+    public void stop() {
+        // Unregister the component client script Servlet
+        WidgetComponentScriptServlet widgetScriptServlet = (WidgetComponentScriptServlet) servletHost.getServletMapping(scriptURI);
+        if (widgetScriptServlet != null) {
+            // Remove the Servlet mapping
+            servletHost.removeServletMapping(scriptURI);
+        }
+    }
+    
+
+    /**
+     * Get the contextRoot considering the HTTP Binding URI when in a embedded environment
+     * @return
+     */
+    private String getContextRoot() {
+        String contextRoot = null;
+        
+        for(ComponentService service : component.getServices()) {
+            if("Widget".equals(service.getName())) {
+                for(org.apache.tuscany.sca.assembly.Binding binding : service.getBindings()) {
+                    if( binding.getClass().getName().contains("HTTPBinding")) {
+                        contextRoot = binding.getURI();
+                    }
+                }
+            }
+        }
+        
+        return contextRoot == null ? "" : contextRoot;
+    }    
+
+}
diff --git a/java/sca/modules/implementation-widget-runtime/src/main/java/org/apache/tuscany/sca/implementation/widget/provider/WidgetImplementationProviderFactory.java b/java/sca/modules/implementation-widget-runtime/src/main/java/org/apache/tuscany/sca/implementation/widget/provider/WidgetImplementationProviderFactory.java
new file mode 100644
index 0000000000..aaf09f062d
--- /dev/null
+++ b/java/sca/modules/implementation-widget-runtime/src/main/java/org/apache/tuscany/sca/implementation/widget/provider/WidgetImplementationProviderFactory.java
@@ -0,0 +1,59 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.implementation.widget.provider;
+
+import org.apache.tuscany.sca.core.ExtensionPointRegistry;
+import org.apache.tuscany.sca.host.http.ServletHost;
+import org.apache.tuscany.sca.host.http.ServletHostExtensionPoint;
+import org.apache.tuscany.sca.implementation.widget.WidgetImplementation;
+import org.apache.tuscany.sca.provider.ImplementationProvider;
+import org.apache.tuscany.sca.provider.ImplementationProviderFactory;
+import org.apache.tuscany.sca.runtime.RuntimeComponent;
+import org.apache.tuscany.sca.web.javascript.ComponentJavaScriptGenerator;
+import org.apache.tuscany.sca.web.javascript.ComponentJavaScriptGeneratorExtensionPoint;
+
+/**
+ * The model representing a resource implementation in an SCA assembly model.
+ *
+ * @version $Rev$ $Date$
+ */
+public class WidgetImplementationProviderFactory implements ImplementationProviderFactory<WidgetImplementation> {
+    private ServletHost servletHost;
+    private ComponentJavaScriptGenerator javaScriptGenerator;
+        
+    /**
+     * Constructs a resource implementation.
+     */
+    public WidgetImplementationProviderFactory(ExtensionPointRegistry extensionPoints) {
+        ServletHostExtensionPoint servletHosts = extensionPoints.getExtensionPoint(ServletHostExtensionPoint.class);
+        this.servletHost = servletHosts.getServletHosts().get(0);
+        
+        ComponentJavaScriptGeneratorExtensionPoint javascriptGeneratorExtensionPoint = extensionPoints.getExtensionPoint(ComponentJavaScriptGeneratorExtensionPoint.class);
+        javaScriptGenerator = javascriptGeneratorExtensionPoint.getComponentJavaScriptGenerators().get(0);
+        
+    }
+
+    public ImplementationProvider createImplementationProvider(RuntimeComponent component, WidgetImplementation implementation) {
+        return new WidgetImplementationProvider(component, implementation, javaScriptGenerator, servletHost);
+    }
+    
+    public Class<WidgetImplementation> getModelType() {
+        return WidgetImplementation.class;
+    }
+}
diff --git a/java/sca/modules/implementation-widget-runtime/src/main/resources/META-INF/services/org.apache.tuscany.sca.provider.ImplementationProviderFactory b/java/sca/modules/implementation-widget-runtime/src/main/resources/META-INF/services/org.apache.tuscany.sca.provider.ImplementationProviderFactory
new file mode 100644
index 0000000000..d0f73cbdbb
--- /dev/null
+++ b/java/sca/modules/implementation-widget-runtime/src/main/resources/META-INF/services/org.apache.tuscany.sca.provider.ImplementationProviderFactory
@@ -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 implementation extension

+org.apache.tuscany.sca.implementation.widget.provider.WidgetImplementationProviderFactory;model=org.apache.tuscany.sca.implementation.widget.WidgetImplementation

diff --git a/java/sca/modules/implementation-widget-runtime/src/main/resources/atomModel.js b/java/sca/modules/implementation-widget-runtime/src/main/resources/atomModel.js
new file mode 100644
index 0000000000..c64c3fc97c
--- /dev/null
+++ b/java/sca/modules/implementation-widget-runtime/src/main/resources/atomModel.js
@@ -0,0 +1,1590 @@
+/*
+ * 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.    
+ */
+ 
+/**
+ * Class that defines a URI represented as a string,
+ */
+function Uri( value ) {
+   this.value = value;
+   this.getValue = function() {
+      return this.value;
+   };
+
+   this.setValue = function(value) {
+      this.value = value;
+   };
+
+   this.toString = function() {
+       return "Uri value=" + this.value;
+   };
+
+   /**
+    * Serialize this element to XML.
+    * atomUri = text
+    */
+   this.toXML = function() {
+      xml = "<uri>";
+      xml += this.value;
+      xml += "</uri>\n";      
+      return xml;
+   };
+}
+
+/* Updated is Date */
+/* Published is Date */
+
+/**
+ * Class that defines an Email represented as a string,
+ */
+function Email( value ) {
+   this.value = value;
+   this.getValue = function() {
+      return this.value;
+   };
+
+   this.setValue = function(value) {
+      this.value = value;
+   };
+
+   this.toString = function() {
+       return "Email value=" + this.value;
+   };
+
+   /**
+    * Serialize this element to XML.
+    * atomEmailAddress = xsd:string { pattern = ".+@.+" }
+    */
+   this.toXML = function() {
+      xml = "<email>";
+      xml += this.value;
+      xml += "</email>\n";      
+      return xml;
+   };
+}
+
+/**
+ * Class that defines an Id represented as a string,
+ */
+function Id( value ) {
+   this.value = value;
+   this.getValue = function() {
+      return this.value;
+   };
+
+   this.setValue = function(value) {
+      this.value = value;
+   };
+
+   this.toString = function() {
+       return "Id value=" + this.value;
+   };
+
+   /**
+    * Serialize this element to XML.  
+    * atomId = element atom:id {
+    *    atomCommonAttributes,
+    *    (atomUri)
+    * }
+    */
+   this.toXML = function() {
+      xml = "<id";
+      if ( this.uri != null ) {
+         xml += " uri=\"" + this.uri + "\"";
+      }
+      if ( this.lang != null ) {
+         xml += " lang=\"" + this.lang + "\"";
+      }
+      xml += ">";
+      xml += this.value;
+      xml += "</id>\n";      
+      return xml;
+   };
+}
+
+
+/**
+ * Class that defines an Id represented as a string,
+ */
+function Logo( value ) {
+   this.value = value;
+   this.getValue = function() {
+      return this.value;
+   };
+
+   this.setValue = function(value) {
+      this.value = value;
+   };
+
+
+   this.toString = function() {
+       return "Logo value=" + this.value;
+   };
+
+   /**
+    * Serialize this element to XML.  
+    * atomLogo = element atom:logo {
+    *    atomCommonAttributes,
+    *    (atomUri)
+    * }
+    */
+   this.toXML = function() {
+      xml = "<logo";
+      if ( this.uri != null ) {
+         xml += " uri=\"" + this.uri + "\"";
+      }
+      if ( this.lang != null ) {
+         xml += " lang=\"" + this.lang + "\"";
+      }
+      xml += ">";
+      xml += this.value;
+      xml += "</logo>\n";      
+      return xml;
+   };
+}
+
+/**
+ * Class that defines a Text object.
+ */
+function Text( content, /* optional */ type ) {
+   this.content = content;
+   this.type = type;
+   if (type == null) this.type = "text"; // If undefined or null, use text
+   
+   this.setText = function(content) {
+      this.content = content;
+   };
+
+   this.getText = function() {
+      return this.content;
+   };
+
+   this.getValue = function() {
+      return this.content;
+   };
+
+   this.setType = function(type) {
+      if ((type != "text") && (type != "html") && (type != "xhtml")) {
+         error( "Text type must be one of text, html, or xhtml" );
+      }
+      this.type = type;
+   };
+
+   this.getType = function() {
+      return this.type;
+   };
+
+   this.setLang = function(lang) {
+      this.lang = lang;
+   };
+
+   this.getLang = function() {
+      return this.lang;
+   };
+
+   this.setUri = function(uri) {
+      this.uri = new Uri( uri );
+   };
+
+   this.getUri = function() {
+      return this.uri;
+   };
+
+   this.toString = function() {
+       return "Text type=" + this.type + ", content=" + this.content;
+   };
+   
+   /** Serialize this text element to XML. 
+    *  atomPlainTextConstruct =
+    *     atomCommonAttributes,
+    *     attribute type { "text" | "html" }?,
+    *     text
+    *
+    *  atomXHTMLTextConstruct =
+    *     atomCommonAttributes,
+    *     attribute type { "xhtml" },
+    *     xhtmlDiv
+    * 
+    *  atomTextConstruct = atomPlainTextConstruct | atomXHTMLTextConstruct
+    */
+   this.toXML = function( elementName ) {
+      if ( elementName == null ) {
+         elementName = "text";
+      }
+      xml = "<" + elementName;
+      if ( this.uri != null ) {
+         xml += " uri=\"" + this.uri + "\"";
+      }
+      if ( this.lang != null ) {
+         xml += " lang=\"" + this.lang + "\"";
+      }
+      xml += " type=\"" + this.type + "\"";
+      xml += ">";
+      if ( this.type === "xhtml" ) {
+         xml += "<div xmlns=\"http://www.w3.org/1999/xhtml\">";      
+      }
+      xml += this.content;
+      if ( this.type === "xhtml" ) {
+         xml += "</div>";      
+      }
+      xml += "</" + elementName + ">";      
+      return xml;
+   }
+}
+
+/**
+ * Class that defines a Person object.
+ */
+function Person( name, email ) {
+   this.name = name;
+   if ( email != null ) {
+      this.email = new Email( email );
+   }
+   
+   this.setName = function( name ) {
+      this.name = name;
+   };
+
+   this.getName = function() {
+      return this.name;
+   };
+
+   this.setLang = function(lang) {
+      this.lang = lang;
+   };
+
+   this.getLang = function() {
+      return this.lang;
+   };
+
+   this.setEmail = function( email ) {
+      this.email = new Email( email );
+   };
+
+   this.getEmail = function() {
+      return this.email;
+   };
+
+   this.setUri = function( uri ) {
+      this.uri = new Uri( uri );
+   };
+
+   this.getUri = function() {
+      return this.uri;
+   };
+
+   this.toString = function() {
+       return "Person name=" + this.name + ", email=" + this.email;
+   };
+
+  /** Serialize this text element to XML. 
+    * atomPersonConstruct =
+    *     atomCommonAttributes,
+    *     (element atom:name { text }
+    *      & element atom:uri { atomUri }?
+    *      & element atom:email { atomEmailAddress }?
+    *      & extensionElement*) 
+    */
+   this.toXML = function( elementName ) {
+      if ( elementName == null ) {
+         elementName = "person";
+      }
+      xml = "<" + elementName;
+      if ( this.uri != null ) {
+         xml += " uri=\"" + this.uri + "\"";
+      }
+      if ( this.lang != null ) {
+         xml += " lang=\"" + this.lang + "\"";
+      }
+      xml += ">\n";
+      if ( this.name != null ) {
+         xml += "<name>" + this.name + "</name>\n";
+      }
+      if ( this.uri != null ) {
+         xml += "<uri>" + this.uri + "</uri>\n";
+      }
+      if ( this.email != null) {
+         xml += this.email.toXML();
+      }      
+      xml += "</" + elementName + ">\n";      
+      return xml;
+   }
+ }
+
+/**
+ * Class that defines a Generator object.
+ */
+function Generator( name, uri ) {
+   this.name = name;
+   this.uri = new Uri( uri );
+   
+   this.setName = function( name ) {
+      this.name = name;
+   };
+
+   this.getName = function() {
+      return this.name;
+   };
+
+   this.setVersion = function(version) {
+      this.version = version;
+   };
+
+   this.getVersion = function() {
+      return this.version;
+   };
+
+   this.setUri = function( uri ) {
+      this.uri = new Email( uri );
+   };
+
+   this.getUri = function() {
+      return this.uri;
+   };
+
+   this.toString = function() {
+       return "Generator name=" + this.name + ", email=" + this.email;
+   };
+
+  /** Serialize this text element to XML. 
+    * atomGenerator = element atom:generator {
+    *    atomCommonAttributes,
+    *    attribute uri { atomUri }?,
+    *    attribute version { text }?,
+    *    text
+    * }
+    */
+   this.toXML = function() {
+      xml = "<generator";
+      if ( this.uri != null ) {
+         xml += " uri=\"" + this.uri.getValue() + "\"";
+      }
+      if ( this.lang != null) {
+         xml += " lang=\"" + this.lang + "\"";
+      }
+      if ( this.version != null ) {
+         xml += " version=\"" + this.version + "\"";
+      }
+      xml += ">";
+      if ( this.name != null ) {
+         xml += this.name;
+      }
+      xml += "</generator>\n";      
+      return xml;
+   }
+}
+
+/**
+ * Class that defines a Category object.
+ *atomCategory =
+ *     element atom:category {
+ *        atomCommonAttributes,
+ *        attribute term { text },
+ *        attribute scheme { atomUri }?,
+ *        attribute label { text }?,
+ *        undefinedContent
+ *     }
+ */
+function Category( label, content ) {
+   this.label = label;
+   this.content = content;
+   
+   this.setLabel = function( label ) {
+      this.label = label;
+   };
+
+   this.getLabel = function() {
+      return this.label;
+   };
+
+   this.setLang = function(lang) {
+      this.lang = lang;
+   };
+
+   this.getLang = function() {
+      return this.lang;
+   };
+
+   this.setTerm = function(term) {
+      this.term = term;
+   };
+
+   this.getTerm = function() {
+      return this.term;
+   };
+
+   this.setScheme = function( scheme ) {
+      this.scheme = scheme;
+   };
+
+   this.getScheme = function() {
+      return this.scheme;
+   };
+
+   this.setContent = function( content ) {
+      this.content = content;
+   };
+
+   this.getContent = function() {
+      return this.content;
+   };
+
+   this.toString = function() {
+       return "Category label=" + this.label;
+   };
+
+   /** Serialize this text element to XML. 
+    *  atomCategory =
+    *     element atom:category {
+    *        atomCommonAttributes,
+    *        attribute term { text },
+    *        attribute scheme { atomUri }?,
+    *        attribute label { text }?,
+    *        undefinedContent
+    *     }
+    */
+   this.toXML = function() {
+      xml = "<category>\n";
+      if ( this.uri != null ) {
+         xml += " uri=\"" + this.uri + "\"";
+      }
+      if ( this.lang != null) {
+         xml += " lang=\"" + this.lang + "\"";
+      }
+      if ( this.term != null) {
+         xml += " term=\"" + this.term + "\"";
+      }
+      if ( this.scheme != null) {
+         xml += " scheme=\"" + this.scheme + "\"";
+      }
+      if ( this.label != null) {
+         xml += " label=\"" + this.label + "\"";
+      }
+      xml += ">\n";
+      if ( this.content != null ) {
+         xml += this.content + "\n";
+      }
+      xml += "</category>\n";      
+      return xml;
+   }
+}
+
+/**
+ * Class that defines a Link object.
+ */
+function Link( href, relation ) {
+   this.href = new Uri( href );
+   this.relation = relation;
+   
+   this.setHRef = function( uri ) {
+      this.href = new Uri( uri );
+   };
+
+   this.getHRef = function() {
+      return this.href;
+   };
+
+   this.setTitle = function( title ) {
+      this.title = title;
+   };
+
+   this.getTitle = function() {
+      return this.title;
+   };
+
+   this.setHRefLang = function(lang) {
+      this.hrefLang = lang;
+   };
+
+   this.getHRefLang = function() {
+      return this.hreflang;
+   };
+
+   this.setTitleLang = function(lang) {
+      this.titleLang = lang;
+   };
+
+   this.getTitleLang = function() {
+      return this.titleLang;
+   };
+   
+   this.setLength= function( length ) {
+      this.length= length;
+   };
+
+   this.getLength = function() {
+      return this.length;
+   };
+
+/*
+<static>  <final> String 	TYPE_ATOM
+          Link type used for Atom content.
+<static>  <final> String 	TYPE_HTML
+          Link type used for HTML content.
+*/          
+   this.setMimeType = function(mimeType) {
+      this.mimeType = mimeType;
+   };
+
+   this.getMimeType = function() {
+      return this.mimeType;
+   };
+
+   this.setContent= function( content ) {
+      this.content = content;
+   };
+
+   this.getContent = function() {
+      return this.content;
+   };
+
+/*
+<static>  <final> String 	REL_ALTERNATE
+          Link that provides the URI of an alternate format of the entry's or feed's contents.
+<static>  <final> String 	REL_ENTRY_EDIT
+          Link that provides the URI that can be used to edit the entry.
+<static>  <final> String 	REL_MEDIA_EDIT
+          Link that provides the URI that can be used to edit the media associated with an entry.
+<static>  <final> String 	REL_NEXT
+          Link that provides the URI of next page in a paged feed.
+<static>  <final> String 	REL_PREVIOUS
+          Link that provides the URI of previous page in a paged feed.
+<static>  <final> String 	REL_RELATED
+          Link that provides the URI of a related link to the entry.
+<static>  <final> String 	REL_SELF
+          Link that provides the URI of the feed or entry.
+<static>  <final> String 	REL_VIA
+          Link that provides the URI that of link that provides the data for the content in the feed.
+*/          
+   this.setRelation = function( relation ) {
+      this.relation = relation;
+   };
+
+   this.getRelation = function() {
+      return this.relation;
+   };
+
+   this.toString = function() {
+       return "Link href=" + this.href + ", title=" + this.title;
+   };
+   
+   /** Serialize this text element to XML. 
+     * atomLink =
+     *     element atom:link {
+     *     atomCommonAttributes,
+     *     attribute href { atomUri },
+     *     attribute rel { atomNCName | atomUri }?,
+     *     attribute type { atomMediaType }?,
+     *     attribute hreflang { atomLanguageTag }?,
+     *     attribute title { text }?,
+     *     attribute length { text }?,
+     *     undefinedContent
+     *  }
+     */
+   this.toXML = function() {
+      xml = "<link";
+      if ( this.relation != null ) {
+         xml += " rel=\"" + this.relation + "\"";
+      }
+      if ( this.uri != null ) {
+         xml += " uri=\"" + this.uri.getValue() + "\"";
+      }
+      if ( this.lang != null) {
+         xml += " lang=\"" + this.lang + "\"";
+      }
+      if ( this.href != null ) {
+         xml += " href=\"" + this.href.getValue() + "\"";
+      }
+      if ( this.hreflang != null ) {
+         xml += " hreflang=\"" + this.hreflang + "\"";
+      }
+      if ( this.title != null ) {
+         xml += " title=\"" + this.title + "\"";
+      }
+      if ( this.length != null ) {
+         xml += " length=\"" + this.length + "\"";
+      }
+      if ( this.content != null ) {
+         xml += this.content + "\n";
+         xml += "</link>\n";
+      } else {
+         xml += "/>\n";
+      }      
+      return xml;
+   }
+   
+}          
+
+/**
+ * Class that defines an Entry object.
+ * atomEntry =
+ *     element atom:entry {
+ *        atomCommonAttributes,
+ *        (atomAuthor*
+ *         & atomCategory*
+ *         & atomContent?
+ *         & atomContributor*
+ *         & atomId
+ *         & atomLink*
+ *         & atomPublished?
+ *         & atomRights?
+ *         & atomSource?
+ *         & atomSummary?
+ *         & atomTitle
+ *         & atomUpdated
+ *         & extensionElement*)
+ *     } 
+ */
+function Entry( init ) {
+   // Constructor code at bottom after function definition
+   
+   this.authors = new Array();
+   this.contributors = new Array();
+   this.categories = new Array();
+   this.links = new Array();
+
+   this.setNamespace = function( namespace ) {
+      this.namespace = namespace;
+   };
+
+   this.getNamespace = function() {
+      return this.namespace;
+   };
+
+   this.setId = function( id ) {
+      if (!((typeof id == "object") && (id instanceof Id)))
+         this.id = new Id( id );
+      else 
+         this.id = id;
+   }
+
+   this.getId = function() {
+      return this.id;
+   };
+
+   this.setPublished = function( published ) {
+      this.published = published;
+   };
+
+   this.getPublished = function() {
+      return this.published;
+   };
+
+   this.setUpdated = function( updated ) {
+      this.updated = updated;
+   };
+
+   this.getUpdated = function() {
+      return this.updated;
+   };
+
+   this.setRights = function( rights ) {
+      this.rights = rights;
+   }
+
+   this.getRights = function() {
+      return this.rights;
+   };
+
+   this.setSource = function( source ) {
+      this.source = source;
+   }
+
+   this.getSource = function() {
+      return this.source;
+   };
+
+   /* Type Text */
+   this.setTitle = function( title ) {
+      if (!((typeof title == "object") && (title instanceof Text)))
+         this.title = new Text( title, "text" );
+      else 
+         this.title = title;
+   }
+
+   this.getTitle = function() {
+      return this.title;
+   };
+
+   /* Type Text */
+   this.setSummary = function( summary ) {
+      if (!((typeof summary == "object") && (summary instanceof Text)))
+         this.summary = new Text( summary, "text" );
+      else
+         this.summary = summary;
+   }
+
+   this.getSummary = function() {
+      return this.summary;
+   };
+
+   /* Type Text */
+   this.setContent = function( content ) {
+      if (!((typeof content == "object") && (content instanceof Text)))
+         this.content = new Text( content, "text" );
+      else
+         this.content = content;
+   }
+
+   this.getContent = function() {
+      return this.content;
+   };
+
+   /**
+    * Add an author.
+    * @param name Author
+    */
+   this.addAuthor = function(person) {
+      if (!((typeof person == "object") && (person instanceof Person)))
+         error( "Entry author must be of type Person" );
+      var i = this.authors.length;
+      this.authors[ i ] = person; 
+   }
+   
+   /**
+    * Get an author.
+    * @param name Author
+    */
+   this.getAuthor = function(name) {
+      return this.authors[ name ];
+   }
+   
+   /**
+    * Set list of authors.
+    * @param name Author
+    */
+   this.setAuthors = function( authors ) {
+      return this.authors = authors;
+   }
+   
+   /**
+    * Get an author"pom.xml".
+    * @param name Author
+    */
+   this.getAuthors = function() {
+      return this.authors;
+   }
+   
+   /**
+    * Add an contributor.
+    * @param name Contributor
+    */
+   this.addContributor = function(person) {
+      if (!((typeof person == "object") && (person instanceof Person)))
+         error( "Entry contributor must be of type Person" );
+      var i = this.contributors.length;
+      this.contributors[ i ] = person;
+   }
+   
+   /**
+    * Get an contributor.
+    * @param name Contributor
+    */
+   this.getContributor = function(name) {
+      return this.contributors[ name ];
+   }
+   
+   /**
+    * Set list of contributors
+    * @param name Author
+    */
+   this.setContributors = function( contributors ) {
+      return this.contributors = contributors;
+   }
+   
+   /**
+    * Get an contributor.
+    * @param name Contributor
+    */
+   this.getContributors = function() {
+      return this.contributors;
+   }
+   
+   /**
+    * Add a category.
+    * @param name Category
+    */
+   this.addCategory = function(category) {
+      if (!((typeof category == "object") && (category instanceof Category)))
+         error( "Entry category must be of type Category" );
+      var i = this.categories.length
+      this.categories[ i ] = category;
+   }
+   
+   /**
+    * Get a names category.
+    * @param name Category
+    */
+   this.getCategory = function(name) {
+      return this.categories[ name ];
+   }
+   
+   /**
+    * Set list of categories
+    * @param name Author
+    */
+   this.setCategories = function( categories ) {
+      return this.categories = categories;
+   }
+   
+   /**
+    * Get all categories.
+    * @param name Category
+    */
+   this.getCategories = function() {
+      return this.categories;
+   }
+   
+   /**
+    * Add an link.
+    * @param name Link
+    */
+   this.addLink = function(link) {
+      if (!((typeof link == "object") && (link instanceof Link)))
+         error( "Entry link must be of type Link" );
+      var i = this.links.length;
+      this.links[ i ] = link;
+   }
+   
+   /**
+    * Get an link.
+    * @param name Link
+    */
+   this.getLink = function(name) {
+      return links[ name ];
+   }
+   
+   /**
+    * Set list of links.
+    * @param name Link
+    */
+   this.setLinks = function( links ) {
+      return this.links = links;
+   }
+   
+   /**
+    * Get an link.
+    * @param name Link
+    */
+   this.getLinks = function() {
+      return links;
+   }
+   
+   this.readFromXML = function( xml ) {
+      if (!((typeof xml == "object") && (xml instanceof string)))
+         error( "Entry xml must be of type string" );
+      // To Do - Read from arbutrary XML such as 
+      // <entry>
+      //   <title type="text">cart-item</title>
+      //   <content type="text">Apple - $ 2.99</content>
+      //   <id>cart-bd5323d6-1f59-4fae-a8f5-01f7654f1e77</id>
+      //   <link href="cart-bd5323d6-1f59-4fae-a8f5-01f7654f1e77" rel="edit"/>
+      //   <link href="cart-bd5323d6-1f59-4fae-a8f5-01f7654f1e77" rel="alternate"/>
+      //   <updated>2008-09-21T23:06:43.921Z</updated>
+      // </entry>
+      
+   }
+  this.readFromDoc = function( htmlDoc ) {
+      // Expect HTML collection.
+      var entryDoc = htmlDoc.getElementsByTagName("entry");
+      for (var i = 0; i < entryDoc.length; i++) {
+         this.readFromNode( entryDoc[ i ] );
+      }
+   }
+
+   this.readFromNode = function( entryNode ) {
+      // Expect entry node
+      var childNodes = entryNode.childNodes;
+      for ( var i = 0; i < childNodes.length; i++ ) {
+         var node = childNodes[ i ];
+         if (node.nodeType == 1 /*Node.ELEMENT_NODE*/) {
+            var tagName = node.tagName;
+            if (tagName == "title" ) {
+               var text = getTextContent( node );
+               var type = node.getAttribute( "type" );
+               if ( type == undefined )
+                  type = "text";
+               var title = new Text( text, type );
+               this.setTitle( title );
+            } else if ( tagName == "subtitle" ) {
+               var text = getTextContent( node );
+               var type = node.getAttribute( "type" );
+               if ( type == undefined )
+                  type = "text";
+               var title = new Text( text, type );
+               this.setSubtitle( title );
+            } else if ( tagName == "id" ) {
+               var id = new Id( getTextContent( node ) );
+               this.setId( id );
+            } else if ( tagName == "updated" ) {
+               var dateText = getTextContent( node );
+               var date = new Date( dateText ); // 2008-09-21T23:06:43.921Z
+               this.setUpdated( date );
+            } else if ( tagName == "link" ) {
+               // var href = node.attributes[ "href" ]; // Works on modern browsers.
+               var attrVal = node.getAttribute( "href" );
+               var link = new Link( attrVal );
+               attrVal = node.getAttribute( "rel" );
+               if ( attrVal )
+                  link.setRelation( attrVal );
+               this.addLink( link );
+            } else if ( tagName == "content" ) {
+               var text = getTextContent( node );
+               var type = node.getAttribute( "type" );
+               if (type == undefined)
+                  type = "text";
+               var content = new Text( text, type );
+               this.setContent( content );
+            } else {
+               // To Do - implement rest of nodes
+			   error( "undefined element node" );
+            } 
+         } else if (node.nodeType == 2 /*Node.ATTRIBUTE_NODE*/) {
+            var attrName = node.tagName;
+         } else if (node.nodeType == 3 /*Node.TEXT_NODE*/) {
+         }
+      }      
+   }
+
+   this.toString = function() {
+       return "Entry title=" + this.title + ", updated=" + this.updated;
+   };
+
+   /** Serialize this text element to XML. 
+	 * atomEntry =
+	 *     element atom:entry {
+	 *        atomCommonAttributes,
+	 *        (atomAuthor*
+	 *         & atomContributor*
+	 *         & atomCategory*
+	 *         & atomLink*
+	 *         & atomTitle
+	 *         & atomId
+	 *         & atomPublished?
+	 *         & atomUpdated
+	 *         & atomContent?
+	 *         & atomRights?
+	 *         & atomSource?
+	 *         & atomSummary?
+	 *         & extensionElement*)
+	 *     }    
+     */
+   this.toXML = function() {
+      xml = "<entry";
+      if ( this.namespace != null ) {
+         xml += " namespace=\"" + this.namespace + "\"";
+      }
+      if ( this.uri != null ) {
+         xml += " uri=\"" + this.uri + "\"";
+      }
+      if ( this.lang != null ) {
+         xml += " lang=\"" + this.lang + "\"";
+      }
+      xml += ">";
+      if ( this.title != null ) {
+         xml += this.title.toXML( "title" );
+      }
+      if ( this.id != null ) {
+         xml += this.id.toXML();
+      }
+      if ( this.published != null ) {
+         xml += "<published>" + this.published + "</published>\n";
+      }
+      if ( this.updated != null ) {
+         xml += "<updated>" + this.updated + "</updated>\n";
+      }
+      if ( this.authors != null ) {
+      for ( var i = 0; i < this.authors.length; i++ ) {
+         var author = this.authors[ i ];
+         xml += author.toXML( "author" );
+      }
+      }
+      if ( this.contributors != null ) {
+      for ( var i = 0; i < this.contributors.length; i++ ) {
+         var contributor = this.contributors[ i ];
+         xml += contributor.toXML( "contributor" );
+      }
+      }
+      if ( this.categories != null ) {
+      for ( var i = 0; i < this.categories.length; i++ ) {
+         var category = this.categories[ i ];
+         xml += category.toXML();
+      }
+      }
+      if ( this.links != null ) {
+      for ( var i = 0; i < this.links.length; i++ ) {
+         var link = this.links[ i ];
+         xml += link.toXML();
+      }
+      }
+      if ( this.rights != null ) {
+         xml += "<rights>" + this.rights + "</rights>\n";
+      }
+      if ( this.source != null ) {
+         xml += "<source>" + this.source + "</source>\n";
+      }
+      if ( this.summary != null ) {
+         xml += this.summary.toXML( "summary" );
+      }
+      if ( this.content != null ) {
+         xml += this.content.toXML( "content" );
+      }
+      xml += "</entry>";      
+      return xml;
+   }
+  
+   // Initialize from constructor   
+   if (typeof init == 'object') {
+      if ( init.nodeType == 1 ) { /* Document Node.ELEMENT_NODE 1 */
+         this.readFromDoc( init );
+      } else {      
+         error( "Feed init unknown type" );
+      }
+   }  else if ( typeof init === 'string' ) {
+      this.setTitle( init );
+   }
+   this.namespace = "http://www.w3.org/2005/Atom";
+}
+
+/**
+ * Class that defines an Feed object.
+ *  atomFeed =
+ *     element atom:feed {
+ *        atomCommonAttributes,
+ *        (atomAuthor*
+ *         & atomCategory*
+ *         & atomContributor*
+ *         & atomGenerator?
+ *         & atomIcon?
+ *         & atomId
+ *         & atomLink*
+ *         & atomLogo?
+ *         & atomRights?
+ *         & atomSubtitle?
+ *         & atomTitle
+ *         & atomUpdated
+ *         & extensionElement*),
+ *        atomEntry* 
+ */
+function Feed( init ) {
+   // See init after functions have been defined.
+
+   this.authors = new Array();
+   this.contributors = new Array();
+   this.categories = new Array();
+   this.links = new Array();
+   this.entries = new Array();
+
+   this.setNamespace = function( namespace ) {
+      this.namespace = namespace;
+   };
+
+   this.getNamespace = function() {
+      return this.namespace;
+   };
+
+   this.setPublished = function( published ) {
+      this.published = published;
+   };
+
+   this.getPublished = function() {
+      return this.published;
+   };
+
+   this.setUpdated = function( updated ) {
+      this.updated = updated;
+   };
+
+   this.getUpdated = function() {
+      return this.updated;
+   };
+
+   this.setContent = function( content ) {
+      if (!((typeof content == "object") && (content instanceof Text)))
+         error( "Entry content must be of type Text" );
+
+      this.content = content;
+   }
+
+   this.getContent = function() {
+      return this.content;
+   };
+
+   this.setRights = function( rights ) {
+      if (!((typeof rights == "object") && (rights instanceof Text)))
+         this.rights = new Text( rights, "text" );
+      else 
+         this.rights = rights;
+   }
+
+   this.getRights = function() {
+      return this.rights;
+   };
+
+   this.setSummary = function( summary ) {
+      if (!((typeof summary == "object") && (summary instanceof Text)))
+         error( "Feed summary must be of type Text" );
+      this.summary = summary;
+   }
+
+   this.getSummary = function() {
+      return this.summary;
+   };
+
+   this.setTitle = function( title ) {
+      if (!((typeof title == "object") && (title instanceof Text)))
+         this.title = new Text( title, "text" );
+      else 
+         this.title = title;
+   }
+
+   this.getTitle = function() {
+      return this.title;
+   };
+
+   this.setSubtitle = function( subtitle ) {
+      if (!((typeof subtitle == "object") && (subtitle instanceof Text)))
+         this.subtitle = new Text( subtitle, "text" );
+      else 
+         this.subtitle = subtitle;
+   }
+
+   this.getSubtitle = function() {
+      return this.subtitle;
+   };
+
+   /* Type Id */
+   this.setId = function( id ) {
+      if (!((typeof id == "object") && (id instanceof Id)))
+         this.id = new Id( id );
+      else 
+         this.id = id;
+   }
+
+   this.getId = function() {
+      return this.id;
+   };
+
+   this.setGenerator = function( generator ) {
+      if (!((typeof generator == "object") && (generator instanceof Generator)))
+         error( "Feed generator must be of type Generator" );
+      this.generator = generator;
+   }
+
+   this.getGenerator = function() {
+      return this.generator;
+   };
+
+   this.setBase = function( base ) {
+      this.base = base;
+   }
+
+   this.getBase = function() {
+      return this.base;
+   };
+
+   this.setLogo = function( logo ) {
+      this.logo = logo;
+   }
+
+   this.getLogo = function() {
+      return this.logo;
+   };
+
+   /**
+    * Add an author.
+    * @param name Author
+    */
+   this.addAuthor = function(person) {
+      if (!((typeof person == "object") && (person instanceof Person)))
+         error( "Entry author must be of type Person" );
+      var i = this.authors.length;
+      this.authors[ i ] = person;
+   }
+   
+   /**
+    * Get an author.
+    * @param name Author
+    */
+   this.getAuthor = function(name) {
+      return this.authors[ name ];
+   }
+   
+   /**
+    * Set list of authors.
+    * @param name Author
+    */
+   this.setAuthors = function( authors ) {
+      return this.authors = authors;
+   }
+   
+   /**
+    * Get an author.
+    * @param name Author
+    */
+   this.getAuthors = function() {
+      return this.authors;
+   }
+   
+   /**
+    * Add an contributor.
+    * @param name Contributor
+    */
+   this.addContributor = function(person) {
+      if (!((typeof person == "object") && (person instanceof Person)))
+         error( "Entry contributor must be of type Person" );
+      var i = this.contributors.length;
+      this.contributors[ i ] = person;
+   }
+   
+   /**
+    * Get an contributor.
+    * @param name Contributor
+    */
+   this.getContributor = function(name) {
+      return this.contributors[ name ];
+   }
+   
+   /**
+    * Set list of contributors
+    * @param name Author
+    */
+   this.setContributors = function( contributors ) {
+      return this.contributors = contributors;
+   }
+   
+   /**
+    * Get an contributor.
+    * @param name Contributor
+    */
+   this.getContributors = function() {
+      return this.contributors;
+   }
+   
+   /**
+    * Add a category.
+    * @param name Category
+    */
+   this.addCategory = function(category) {
+      if (!((typeof category == "object") && (category instanceof Category)))
+         error( "Feed category must be of type Category" );
+      var i = this.categories.length;
+      this.categories[ i ] = category;
+   }
+   
+   /**
+    * Get a named contributor.
+    * @param name Category
+    */
+   this.getCategory = function(name) {
+      return this.categories[ name ];
+   }
+   
+   /**
+    * Set list of categories
+    * @param category
+    */
+   this.setCategories = function( categories ) {
+      return this.categories = categories;
+   }
+   
+   /**
+    * Get all categories.
+    * @param name Category
+    */
+   this.getCategories = function() {
+      return this.categories;
+   }
+   
+   /**
+    * Add an link.
+    * @param name Link
+    */
+   this.addLink = function(link) {
+      if (!((typeof link == "object") && (link instanceof Link)))
+         error( "Entry link must be of type Link" );
+      var i = this.links.length;
+      this.links[ i ] = link;
+   }
+   
+   /**
+    * Get an link.
+    * @param name Link
+    */
+   this.getLink = function(name) {
+      return this.links[ name ];
+   }
+   
+   /**
+    * Set list of links.
+    * @param name Link
+    */
+   this.setLinks = function( links ) {
+      return this.links = links;
+   }
+   
+   /**
+    * Get an link.
+    * @param name Link
+    */
+   this.getLinks = function() {
+      return this.links;
+   }
+   
+   /**
+    * Add an entry.
+    * @param name Entry
+    */
+   this.addEntry = function(entry) {
+      if (!((typeof entry == "object") && (entry instanceof Entry)))
+         error( "Entry entry must be of type Entry" );
+      var i = this.entries.length;
+      this.entries[ i ] = entry;
+   }
+   
+   /**
+    * Get an entry by name.
+    * @param name Entry
+    */
+   this.getEntry = function(name) {
+      return this.entries[ name ];
+   }
+   
+   /**
+    * Set list of entries
+    * @param name Author
+    */
+   this.setEntries = function( entries ) {
+      return this.entries = entries;
+   }
+   
+   /**
+    * Get an contributor.
+    * @param name Entry
+    */
+   this.getEntries = function() {
+      return this.entries;
+   }
+   
+   this.readFromXML = function( xml ) {
+      // To Do Read from arbitraty XML such as 
+      // <feed xmlns="http://www.w3.org/2005/Atom">
+      // <title type="text">shopping cart</title>
+      // <subtitle type="text">Total : $4.54</subtitle>
+      // <entry>
+      //    ...
+      // </entry>
+      // </feed>    
+   }
+
+   this.readFromDoc = function( htmlDoc ) {
+      // Expect HTML collection.
+      var feedDoc = htmlDoc.getElementsByTagName("feed");
+      for (var i = 0; i < feedDoc.length; i++) {
+         this.readFromNode( feedDoc[ i ] );
+      }
+   }
+   this.readFromNode = function( feedNode ) {
+      // Expect feed node
+      var childNodes = feedNode.childNodes;
+      for ( var i = 0; i < childNodes.length; i++ ) {
+         var node = childNodes[ i ];
+         if (node.nodeType == 1 /*Node.ELEMENT_NODE*/) {
+            var tagName = node.tagName;
+            if (tagName == "title" ) {
+               var text = getTextContent( node );
+               var type = node.getAttribute( "type" );
+               if ( type == undefined )
+                  type = "text";
+               var title = new Text( text, type );
+               this.setTitle( title );
+            } else if ( tagName == "subtitle" ) {
+               var text = getTextContent( node );
+               var type = node.getAttribute( "type" );
+               if ( type == undefined )
+                  type = "text";
+               var title = new Text( text, type );
+               this.setSubtitle( title );
+            } else if ( tagName == "entry" ) {
+               var entry = new Entry();
+               entry.readFromNode( node );
+               this.addEntry( entry ); 
+            } else if ( tagName == "id" ) {
+               var id = new Id( getTextContent( node ) );
+               this.setId( id );
+            } else if ( tagName == "updated" ) {
+               var dateText = getTextContent( node );
+               var date = new Date( dateText ); //2008-09-21T23:06:53.750Z
+               this.setUpdated( date );
+            } else if ( tagName == "link" ) {
+               // var href = node.attributes[ "href" ]; // Works on modern browsers.
+               var attrVal = node.getAttribute( "href" );
+               var link = new Link( attrVal );
+               attrVal = node.getAttribute( "rel" );
+               if ( attrVal )
+                  link.setRelation( attrVal );
+               this.addLink( link );
+            } else {
+               // To Do - implement rest of nodes
+			   error( "undefined element node" );
+            } 
+         } else if (node.nodeType == 2 /*Node.ATTRIBUTE_NODE*/) {
+            var attrName = node.tagName;
+         } else if (node.nodeType == 3 /*Node.TEXT_NODE*/) {
+         }
+      }      
+   }
+
+   this.toString = function() {
+       return "Feed title=" + this.title + ", updated=" + this.updated;
+   };
+
+   /** Serialize this text element to XML. 
+	 *  atomFeed =
+	 *     element atom:feed {
+	 *        atomCommonAttributes,
+	 *        (atomAuthor*
+	 *         & atomContributor*
+	 *         & atomCategory*
+	 *         & atomLink*
+	 *         & atomTitle
+	 *         & atomSubtitle?
+	 *         & atomId
+	 *         & atomUpdated
+	 *         & atomRights?	 
+	 *         & atomGenerator?
+	 *         & atomIcon?
+	 *         & atomLogo?
+	 *         & extensionElement*),
+	 *        atomEntry* 
+     */
+   this.toXML = function() {
+      xml = "<feed";
+      if ( this.namespace != null ) {
+         xml += " namespace=\"" + this.namespace + "\"";
+      }
+      if ( this.uri != null ) {
+         xml += " uri=\"" + this.uri + "\"";
+      }
+      if ( this.lang != null ) {
+         xml += " lang=\"" + this.lang + "\"";
+      }
+      xml += ">\n";
+      if ( this.title != null ) {
+         xml += this.title.toXML( "title" );
+      }
+      if ( this.subtitle != null ) {
+         xml += this.subtitle.toXML( "subtitle" );
+      }
+      if ( this.id != null ) {
+         xml += this.id.toXML();
+      }
+      if ( this.published != null ) {
+         xml += "<published>" + this.published + "</published>\n";
+      }
+      if ( this.updated != null ) {
+         xml += "<updated>" + this.updated + "</updated>\n";
+      }
+      if ( this.authors != null ) {      
+      for ( var i = 0; i < this.authors.length; i++ ) {
+         var author = this.authors[ i ];
+         xml += author.toXML( "author" );
+      }
+      }
+      if ( this.contributors != null ) {      
+      for ( var i = 0; i < this.contributors.length; i++ ) {
+         var contributor = this.contributors[ i ];
+         xml += contributor.toXML( "contributor" );
+      }
+      }
+      if ( this.categories != null ) {      
+      for ( var i = 0; i < this.categories.length; i++ ) {
+         var category = this.categories[ i ];
+         xml += category.toXML();
+      }
+      }
+      if ( this.links != null ) {      
+      for ( var i = 0; i < this.links.length; i++ ) {
+         var link = this.links[ i ];
+         xml += link.toXML();
+      }
+      }
+      if ( this.rights != null ) {
+         xml += this.rights.toXML( "rights" );
+      }
+      if ( this.source != null ) {
+         xml += "<source>" + this.source + "</source>\n";
+      }
+      if ( this.logo != null ) {
+         xml += "<logo>" + this.logo + "</logo>\n";
+      }
+      if ( this.icon != null ) {
+         xml += "<icon>" + this.icon + "</icon>\n";
+      }
+      if ( this.generator != null ) {
+         xml += this.generator.toXML( "generator" );
+      }
+      if ( this.summary != null ) {
+         xml += this.summary.toXML( "summary" );
+      }
+      if ( this.entries != null ) {
+      for ( var i = 0; i < this.entries.length; i++ ) {
+         var entry = this.entries[ i ];
+         xml += entry.toXML();
+      }      
+      }      
+      xml += "</feed>\n";      
+      return xml;
+   }
+  
+   // Initialize from constructor   
+   if (typeof init == 'object') {
+      if ( init.nodeType == 9 ) { /* Document Node.DOCUMENT_NODE 9 */
+         this.readFromDoc( init );
+      } else {      
+         error( "Feed init unknown type" );
+      }
+   }  else if ( typeof init === 'string' ) {
+      this.setTitle( init );
+   }   
+   this.namespace = "http://www.w3.org/2005/Atom";
+}
+
+function error( message ) {
+   alert( message );
+}
+
+/* Returns inner text on both IE and modern browsers. */
+function getTextContent(node) {
+   // innerText for IE, textContent for others, child text node, "" for others.
+   if ( node.innerText )
+      return node.innerText;
+   if ( node.textContent )
+      return node.textContent;
+   if ( node.hasChildNodes() ) {
+      var childNodes = node.childNodes
+      for ( var j = 0; j < childNodes.length; j++ ) {
+         var childNode = childNodes[ j ];
+         var childType = childNode.nodeType;
+         if (childNode.nodeType == 3 /*Node.TEXT_NODE*/) {
+            return childNode.nodeValue;
+         }
+      } 
+   }
+   return undefined;
+} 
\ No newline at end of file
diff --git a/java/sca/modules/implementation-widget-runtime/src/main/resources/binding-http.js b/java/sca/modules/implementation-widget-runtime/src/main/resources/binding-http.js
new file mode 100644
index 0000000000..60bd841679
--- /dev/null
+++ b/java/sca/modules/implementation-widget-runtime/src/main/resources/binding-http.js
@@ -0,0 +1,105 @@
+/*
+ * 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.    
+ */
+	
+function HTTPClient(uri) {
+
+	this.msxmlNames = [ "MSXML2.XMLHTTP.5.0",
+                        "MSXML2.XMLHTTP.4.0",
+                        "MSXML2.XMLHTTP.3.0",
+                        "MSXML2.XMLHTTP",
+                        "Microsoft.XMLHTTP" ];
+			            
+	this.uri=uri;
+	
+	this.get = function(id, responseFunction) {
+		var xhr = this.createXMLHttpRequest();
+		xhr.onreadystatechange = function() {
+			if (xhr.readyState == 4) {
+				if (xhr.status == 200) {
+				    var strDocument = xhr.responseText;
+                    if (responseFunction != null) responseFunction(strDocument);
+				} else {
+                    alert("get - Error getting data from the server");
+				}
+			}
+		}
+		xhr.open("GET", uri + '/' + id, true);
+		xhr.send(null);
+	}	
+
+	this.post = function (entry, responseFunction) {
+		var xhr = this.createXMLHttpRequest();
+		xhr.onreadystatechange = function() {
+			if (xhr.readyState == 4) {
+				if (xhr.status == 201) {
+				    var strDocument = xhr.responseText;
+					if (responseFunction != null) responseFunction(strDocument);
+				} else {
+					alert("post - Error getting data from the server");
+				}
+			}
+		}
+		xhr.open("POST", uri, true);
+		xhr.setRequestHeader("Content-Type", "text/xml");
+		xhr.send(entry);
+	}	
+
+	this.put = function (id, entry, responseFunction) {
+		var xhr = this.createXMLHttpRequest();
+		xhr.onreadystatechange = function() {
+			if (xhr.readyState == 4) {
+				if (xhr.status == 200) {
+				    var strDocument = xhr.responseText;
+					if (responseFunction != null) responseFunction(strDocument);
+				} else {
+					alert("put - Error getting data from the server");
+				}
+			}
+		}
+		xhr.open("PUT", uri + '/' + id, true);
+		xhr.setRequestHeader("Content-Type", "text/xml");
+		xhr.send(entry);
+	}	
+
+	this.del = function (id, responseFunction) {       
+		var xhr = this.createXMLHttpRequest();
+		xhr.onreadystatechange = function() {
+			if (xhr.readyState == 4) {
+				if (xhr.status == 200) {
+					if (responseFunction != null) responseFunction();
+				} else {
+					alert("delete - Error getting data from the server");
+				}
+			}
+		}
+		xhr.open("DELETE", uri + '/' + id, true);		
+		xhr.send(null);
+	}
+	this.createXMLHttpRequest = function () {
+        /* Mozilla XMLHttpRequest */
+        try {return new XMLHttpRequest();} catch(e) {}      
+		
+        /* Microsoft MSXML ActiveX */
+        for (var i=0;i < this.msxmlNames.length; i++) {
+            try {return new ActiveXObject(this.msxmlNames[i]);} catch (e) {}
+        }
+        alert("XML http request not supported");
+        return null;
+	}
+}