* Generated <ComponentName>.js automatically from binding metadata found into composite files.

  -> Removed Widget.js from examples/helloworld-widget as now this file is generated automatically.
* Generated Java classes for <implementation.widget> when its enclosing <component> has some <reference> and <property> children.
* Added checking for <implementation.widget default="...">

examples/helloworld-widget/src/main/resources/helloworld-widget.composite

@@ -42,11 +42,7 @@
     <service name="Resource">
       <tuscany:binding.http uri="/SayHelloWidget"/>
     </service>
-<!-- 
-    <reference name="sayHello" target="SayHello/SayHello">
-      <binding.ws/>
-    </reference>
- -->
+    <reference name="sayHello" target="SayHello/SayHello"/>
   </component>
   
 </composite>

examples/helloworld-widget/src/main/resources/widget/Widget.js

-function includeJs(jsFilePath, callback) {
-    var js = document.createElement("script");
-    js.type = "text/javascript";
-    js.onload = callback
-    js.src = jsFilePath;
-    document.head.appendChild(js);
-}
-
-<!-- the object to talk to the SayHello Web service. -->
-var sayHello;
-
-<!-- Following generates and retrieves a JavaScript client for the SayHello Web service. -->
-includeJs("/SayHello?js",
-  function() {
-    sayHello = new widget_helloworld_examples_frascati_ow2_org__SayHelloPortType_widget_helloworld_examples_frascati_ow2_org__SayHelloPort()
-  }
-)

frascati/modules/frascati-implementation-widget/src/main/java/org/ow2/frascati/implementation/widget/BindingInfo.java

+/**
+ * OW2 FraSCAti: SCA Implementation Widget
+ * Copyright (C) 2012 Inria, University of Lille 1
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
+ * USA
+ *
+ * Contact: frascati@ow2.org
+ *
+ * Author: Philippe Merle
+ *
+ * Contributor:
+ *
+ */
+
+package org.ow2.frascati.implementation.widget;
+
+import java.io.PrintWriter;
+
+/**
+ * OW2 FraSCAti implementation widget binding info class.
+ *
+ * @author Philippe Merle - INRIA
+ * @version 1.5
+ */
+public class BindingInfo
+{
+  //---------------------------------------------------------------------------
+  // Internal state.
+  // --------------------------------------------------------------------------
+
+  /**
+   * Name of the SCA reference.
+   */
+  private String referenceName;
+
+  /**
+   * Java interface of the SCA reference.
+   */
+  private Class<?> javaInterface;
+
+  /**
+   * URI where the SCA service is bound.
+   */
+  private String uri;
+
+  /**
+   * Name of the Apache CXF JavaScript proxy.
+   */
+  private String apacheCxfProxyName;
+
+  //---------------------------------------------------------------------------
+  // Constructor.
+  // --------------------------------------------------------------------------
+
+  /**
+   * Constructs a binding info.
+   */
+  public BindingInfo(String referenceName, Class<?> javaInterface, String uri)
+  {
+    this.referenceName = referenceName;
+    this.javaInterface = javaInterface;
+    this.uri = uri;
+    computeApacheCxfJavaScriptProxyName();
+  }
+
+  //---------------------------------------------------------------------------
+  // Internal methods.
+  // --------------------------------------------------------------------------
+
+  /**
+   * Compute the Apache CXF JavaScript proxy name associated to the Java interface.
+   */
+  private void computeApacheCxfJavaScriptProxyName()
+  {
+    String simpleName = javaInterface.getSimpleName();
+    // compute a prefix for the enclosing packages of this Java interface.
+    String[] packages = javaInterface.getPackage().getName().split("\\.");
+	StringBuilder sb = new StringBuilder();
+	for(int i=packages.length-1; i >= 0; i--) {
+      sb.append(packages[i]);
+      sb.append('_');
+	}
+	String prefix = sb.toString();
+	// compute the Apache CXF JavaScript proxy name.
+	apacheCxfProxyName = prefix + '_' + simpleName + "PortType_" + prefix + '_' + simpleName + "Port";
+  }
+  
+  //---------------------------------------------------------------------------
+  // Public methods.
+  // --------------------------------------------------------------------------
+
+  /**
+   * Generate the JavaScript code for declaring and setting the proxy variable.
+   */
+  public void generateJavaScript(PrintWriter pw)
+  {
+    pw.println();
+    pw.println("<!-- the object to talk to the " + referenceName + " Web service. -->");
+    pw.println("var " + referenceName + ";");
+    pw.println("<!-- retrieve the JavaScript proxy client for the " + referenceName + " Web service. -->");
+    pw.println("includeJs(\"" + uri + "?js\",");
+    pw.println("  function() {");
+    pw.println("    " + referenceName + " = new " + apacheCxfProxyName + "()");
+    pw.println("  }");
+    pw.println(')');
+  }
+}

frascati/modules/frascati-implementation-widget/src/main/java/org/ow2/frascati/implementation/widget/FrascatiImplementationWidgetProcessor.java

@@ -27,18 +27,32 @@
 
 package org.ow2.frascati.implementation.widget;
 
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.PrintStream;
+import java.util.ArrayList;
 import java.util.List;
 import javax.servlet.Servlet;
 
+import org.eclipse.stp.sca.Binding;
 import org.eclipse.stp.sca.Component;
 import org.eclipse.stp.sca.ComponentService;
+import org.eclipse.stp.sca.ComponentReference;
 import org.eclipse.stp.sca.Interface;
 import org.eclipse.stp.sca.JavaInterface;
 import org.eclipse.stp.sca.ScaFactory;
+import org.eclipse.stp.sca.PropertyValue;
+import org.eclipse.stp.sca.WebServiceBinding;
+
+import org.oasisopen.sca.annotation.Property;
+import org.oasisopen.sca.annotation.Reference;
 
 import org.ow2.frascati.assembly.factory.api.ProcessingContext;
 import org.ow2.frascati.assembly.factory.api.ProcessorException;
 import org.ow2.frascati.assembly.factory.processor.AbstractComponentFactoryBasedImplementationProcessor;
+import org.ow2.frascati.assembly.factory.processor.AbstractInterfaceProcessor;
+import org.ow2.frascati.component.factory.api.MembraneGeneration;
 import org.ow2.frascati.metamodel.web.WidgetImplementation;
 import org.ow2.frascati.metamodel.web.WebPackage;
 import org.ow2.frascati.tinfi.api.control.SCAPropertyController;
@@ -56,6 +70,18 @@ public class FrascatiImplementationWidgetProcessor
   // Internal state.
   // --------------------------------------------------------------------------
 
+  /**
+   * Package where content classes are generated.
+   */
+  @Property(name = "package")
+  private String packageGeneration;
+
+  /**
+   * Reference to Juliac configuration.
+   */
+  @Reference(name = "membrane-generation")
+  private MembraneGeneration membraneGeneration;
+
   //---------------------------------------------------------------------------
   // Internal methods.
   // --------------------------------------------------------------------------
@@ -80,16 +106,25 @@ public class FrascatiImplementationWidgetProcessor
       throws ProcessorException
   {
     String location = widgetImplementation.getLocation();
-
     checkAttributeMustBeSet(widgetImplementation, "location", location, processingContext);
 
+    boolean checkDefaultInClassLoader = true;
+
     // Check that location is present in the class path.
     if(!isNullOrEmpty(location) && processingContext.getClassLoader().getResourceAsStream(location) == null) {
       // Location not found.
       error(processingContext, widgetImplementation, "Location '" + location + "' not found");
+      checkDefaultInClassLoader = false;
     }
 
-    // TODO check widgetImplementation.default
+    String default_ = widgetImplementation.getDefault();
+//    checkAttributeMustBeSet(widgetImplementation, "default", default_, processingContext);
+
+    // Check that default is present in the class path.
+    if(checkDefaultInClassLoader && !isNullOrEmpty(default_) && processingContext.getClassLoader().getResourceAsStream(location + '/' + default_) == null) {
+      // Default not found.
+      error(processingContext, widgetImplementation, "Default '" + default_ + "' not found");
+    }
 
     // Get the enclosing SCA component.
     Component component = getParent(widgetImplementation, Component.class);
@@ -136,8 +171,84 @@ public class FrascatiImplementationWidgetProcessor
   protected final void doGenerate(WidgetImplementation widgetImplementation, ProcessingContext processingContext)
       throws ProcessorException
   {
+    // Get the parent component.
+    Component component = getParent(widgetImplementation, Component.class);
+
+    // Name of the content class.
+    String contentFullClassName = null;
+
+    if(component.getProperty().size() == 0 && component.getReference().size() == 0) {
+      // if no property and no reference then use default ImplementationVelocity class.
+      contentFullClassName = ImplementationWidgetComponent.class.getName();
+    } else {
+      String basename = widgetImplementation.getLocation() + widgetImplementation.getDefault();
+      int hashCode = basename.hashCode();
+      if(hashCode < 0) {
+        hashCode = -hashCode;
+      }
+
+      // if some property or some reference then generate an ImplementationWidgetComponent class.
+	  String contentClassName = ImplementationWidgetComponent.class.getSimpleName() + hashCode;
+      // Add the package to the content class name.
+      contentFullClassName = this.packageGeneration + '.' + contentClassName;
+
+      try {
+        processingContext.loadClass(contentFullClassName);
+      } catch(ClassNotFoundException cnfe) {
+        // If the class can not be found then generate it.
+        log.info(packageGeneration + '.' + contentClassName);
+
+        // Create the output directory for generation.
+        String outputDirectory = this.membraneGeneration.getOutputDirectory() + "/generated-frascati-sources";
+
+        // Add the output directory to the Java compilation process.
+        this.membraneGeneration.addJavaSource(outputDirectory);
+
+        try { // Generate a sub class of ImplementationVelocity declaring SCA references and properties.
+          File packageDirectory = new File(outputDirectory + '/'
+                    + packageGeneration.replace('.', '/'));
+          packageDirectory.mkdirs();
+
+          PrintStream file = new PrintStream(new FileOutputStream(new File(
+                  packageDirectory, contentClassName + ".java")));
+
+          file.println("package " + packageGeneration + ";\n");
+          file.println("public class " + contentClassName + " extends "
+                  + ImplementationWidgetComponent.class.getName());
+          file.println("{");
+          int index = 0;
+          for (PropertyValue propertyValue : component.getProperty()) {
+            // Get the property value and class.
+            Object propertyValueObject = processingContext.getData(propertyValue, Object.class);
+            Class<?> propertyValueClass = (propertyValueObject != null) ? propertyValueObject
+                        .getClass() : String.class;
+            file.println("  @" + Property.class.getName() + "(name = \""
+                        + propertyValue.getName() + "\")");
+            file.println("  protected " + propertyValueClass.getName()
+                        + " property" + index + ";");
+            index++;
+          }
+          index = 0;
+          for (ComponentReference componentReference : component.getReference()) {
+            file.println("  @" + Reference.class.getName() + "(name = \""
+                        + componentReference.getName() + "\")");
+            file.println("  protected Object reference" + index + ";");
+            index++;
+          }
+          file.println("}");
+          file.flush();
+          file.close();
+        } catch(FileNotFoundException fnfe) {
+          severe(new ProcessorException(widgetImplementation, fnfe));
+        }
+      }
+    }
+
     // Generate a FraSCAti SCA primitive component.
-    generateScaPrimitiveComponent(widgetImplementation, processingContext, ImplementationWidgetComponent.class.getName());
+    generateScaPrimitiveComponent(widgetImplementation, processingContext, contentFullClassName);
+
+    // Store the content class name to retrieve it from next doInstantiate method.
+    processingContext.putData(widgetImplementation, String.class, contentFullClassName);  
   }
 
   /**
@@ -149,7 +260,8 @@ public class FrascatiImplementationWidgetProcessor
   {
     // Instantiate a FraSCAti SCA primitive component.
     org.objectweb.fractal.api.Component component =
-      instantiateScaPrimitiveComponent(widgetImplementation, processingContext, ImplementationWidgetComponent.class.getName());
+      instantiateScaPrimitiveComponent(widgetImplementation, processingContext,
+    		      processingContext.getData(widgetImplementation, String.class));
 
     // Retrieve the SCA property controller of this Fractal component.
     SCAPropertyController propertyController =  (SCAPropertyController)getFractalInterface(component, SCAPropertyController.NAME);
@@ -164,6 +276,44 @@ public class FrascatiImplementationWidgetProcessor
     propertyController.setValue("default", widgetImplementation.getDefault());
   }
 
+  /**
+   * @see org.ow2.frascati.assembly.factory.processor.api.Processor#complete(ElementType, ProcessingContext)
+   */
+  @Override
+  protected final void doComplete(WidgetImplementation widgetImplementation, ProcessingContext processingContext)
+      throws ProcessorException
+  {
+	// Compute the binding infos.
+	List<BindingInfo> bindingInfos = new ArrayList<BindingInfo>();
+
+	// Traverse all references of the enclosing component of this widget implementation.
+    for(ComponentReference reference : getParent(widgetImplementation, Component.class).getReference()) {
+      // for each reference, traverse all references of the target service.
+      for(Binding binding : reference.getTarget2().getBinding()) {
+        // when binding is a Web Service
+        if(binding instanceof WebServiceBinding) {
+          WebServiceBinding wsb = (WebServiceBinding)binding;
+          bindingInfos.add(
+            new BindingInfo(reference.getName(),
+                            AbstractInterfaceProcessor.getClass(reference.getInterface(), processingContext),
+                            wsb.getUri()
+            )
+          );
+        }
+      }
+    }
+
+    // Retrieve the FraSCAti SCA primitive component.
+    org.objectweb.fractal.api.Component component =
+      processingContext.getData(widgetImplementation, org.objectweb.fractal.api.Component.class);  
+
+    // Retrieve the SCA property controller of this Fractal component.
+    SCAPropertyController propertyController =  (SCAPropertyController)getFractalInterface(component, SCAPropertyController.NAME);
+
+    // Set the bindingInfos property.
+    propertyController.setValue("bindingInfos", bindingInfos);
+  }
+
   //---------------------------------------------------------------------------
   // Public methods.
   // --------------------------------------------------------------------------

frascati/modules/frascati-implementation-widget/src/main/java/org/ow2/frascati/implementation/widget/ImplementationWidgetComponent.java

@@ -29,6 +29,8 @@ package org.ow2.frascati.implementation.widget;
 
 import java.io.IOException;
 import java.io.InputStream;
+import java.io.PrintWriter;
+import java.util.List;
 import java.util.Properties;
 
 import javax.servlet.Servlet;
@@ -37,6 +39,7 @@ import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 
+import org.osoa.sca.annotations.ComponentName;
 import org.osoa.sca.annotations.Property;
 import org.osoa.sca.annotations.Scope;
 import org.osoa.sca.annotations.Service;
@@ -93,6 +96,18 @@ public class ImplementationWidgetComponent
   @Property(name = "default")
   private String defaultResource;
 
+  /**
+   * Binding infos.
+   */
+  @Property(name = "bindingInfos")
+  private List<BindingInfo> bindingInfos;
+
+  /**
+   * The name of the enclosing SCA component.
+   */
+  @ComponentName
+  private String componentName;
+
   //---------------------------------------------------------------------------
   // Internal methods.
   // --------------------------------------------------------------------------
@@ -107,10 +122,14 @@ public class ImplementationWidgetComponent
 	// The requested resource.
     String pathInfo = request.getPathInfo();
     if(pathInfo == null) {
-      pathInfo = "";
+      pathInfo = defaultResource;
+    }
+
+    // When the JavaScript for the enclosing SCA component is requested then generate it. 
+    if(('/' + componentName + ".js").equals(pathInfo)) {
+      generateJavaScriptForEnclosingComponent(response);
+      return;
     }
-    int idx = pathInfo.lastIndexOf('.');
-    String extension = (idx != -1) ? pathInfo.substring(idx) : "";
 
     // Search the requested resource into the class loader.
     InputStream is = this.classloader.getResourceAsStream(this.location + pathInfo);
@@ -123,6 +142,10 @@ public class ImplementationWidgetComponent
 
     // Requested resource found.
     response.setStatus(HttpServletResponse.SC_OK);
+
+    // set the content type.
+    int idx = pathInfo.lastIndexOf('.');
+    String extension = (idx != -1) ? pathInfo.substring(idx) : "";
     String mimeType = extensions2mimeTypes.getProperty(extension);
     if(mimeType == null) {
       mimeType = "text/plain";
@@ -133,6 +156,27 @@ public class ImplementationWidgetComponent
     Stream.copy(is, response.getOutputStream());
   }
 
+  /**
+   * Generate the JavaScript for the enclosing SCA component.
+   */
+  protected void generateJavaScriptForEnclosingComponent(HttpServletResponse response)
+    throws IOException
+  {
+    response.setStatus(HttpServletResponse.SC_OK);
+    response.setContentType("text/javascript");
+    PrintWriter pw = response.getWriter();
+    pw.println("function includeJs(jsFilePath, callback) {");
+    pw.println("  var js = document.createElement(\"script\");");
+    pw.println("  js.type = \"text/javascript\";");
+    pw.println("  js.onload = callback");
+    pw.println("  js.src = jsFilePath;");
+    pw.println("  document.head.appendChild(js);");
+    pw.println('}');
+    for(BindingInfo bi : this.bindingInfos) {
+      bi.generateJavaScript(pw);
+    }
+  }
+
   //---------------------------------------------------------------------------
   // Public methods.
   // --------------------------------------------------------------------------

frascati/modules/frascati-implementation-widget/src/main/resources/org/ow2/frascati/assembly/factory/AssemblyFactory.composite

@@ -28,6 +28,10 @@
 <composite xmlns="http://www.osoa.org/xmlns/sca/1.0" xmlns:af="org/ow2/frascati/assembly/factory" name="org.ow2.frascati.assembly.factory.AssemblyFactory">
   <component constrainingType="af:ComponentFactoryBasedImplementationProcessorType" name="frascati-implementation-widget">
     <implementation.java class="org.ow2.frascati.implementation.widget.FrascatiImplementationWidgetProcessor"/>
+    <property name="package">generated.frascati</property>
+    <reference name="membrane-generation">
+      <interface.java interface="org.ow2.frascati.component.factory.api.MembraneGeneration"/>
+    </reference>
   </component>
   <wire source="sca-implementation/implementations" target="frascati-implementation-widget/implementation-processor"/>
 </composite>

frascati/modules/frascati-implementation-widget/src/test/java/org/ow2/frascati/implementation/widget/test/FraSCAtiTest.java

@@ -66,9 +66,8 @@ public class FraSCAtiTest {
         compositeManager.processComposite(new QName("CheckingErrorsWarnings"), processingContext);
       } catch(ManagerException me) {
         // Let's note that the following number of errors is conform to comments in file 'CheckingErrorsWarnings.composite'
-    	assertEquals("The number of checking errors", 5, processingContext.getErrors());
-        // Let's note that the file 'CheckingErrorsWarnings.composite' produces 2 warnings,
-        // one warning is also produced by the OW2 FraSCAti Parser (EMF diagnostics).
+    	assertEquals("The number of checking errors", 6, processingContext.getErrors());
+        // Let's note that the file 'CheckingErrorsWarnings.composite' produces 2 warnings.
         assertEquals("The number of checking warnings", 2, processingContext.getWarnings());
       }
     }

frascati/modules/frascati-implementation-widget/src/test/resources/CheckingErrorsWarnings.composite

@@ -36,7 +36,8 @@
   </component>
 
   <component name="c2">
-    <web:implementation.widget location="contents/"/>
+    <!-- following is an error: Default 'foo' not found. -->
+    <web:implementation.widget location="contents/" default="foo"/>
 
     <!-- following is an error: <implementation.widget> can't have more than one SCA service. -->
     <service name="s1">