1 files changed, 149 insertions, 0 deletions
diff --git a/sca-java-1.x/branches/sca-java-1.1/modules/implementation-widget/src/main/java/org/apache/tuscany/sca/implementation/widget/WidgetComponentServlet.java b/sca-java-1.x/branches/sca-java-1.1/modules/implementation-widget/src/main/java/org/apache/tuscany/sca/implementation/widget/WidgetComponentServlet.java
new file mode 100644
index 0000000000..19a186ea8a
--- /dev/null
+++ b/sca-java-1.x/branches/sca-java-1.1/modules/implementation-widget/src/main/java/org/apache/tuscany/sca/implementation/widget/WidgetComponentServlet.java
@@ -0,0 +1,149 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.implementation.widget;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URI;
+import java.net.URL;
+
+import javax.servlet.ServletOutputStream;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import org.apache.tuscany.sca.assembly.Binding;
+import org.apache.tuscany.sca.assembly.ComponentReference;
+import org.apache.tuscany.sca.assembly.OptimizableBinding;
+import org.apache.tuscany.sca.runtime.RuntimeComponent;
+
+/**
+ * Servlet to handle requests for ..
+ * 
+ * @version $Rev$ $Date$
+ */
+public class WidgetComponentServlet extends HttpServlet {
+    private static final long serialVersionUID = -2996033426789721509L;
+    
+    private transient RuntimeComponent component;
+    private transient URI servletURI;
+
+    public WidgetComponentServlet(RuntimeComponent component, String servletURI) {
+        this.component = component;
+        this.servletURI = URI.create(servletURI);
+    }
+
+    @Override
+    public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
+
+        ServletOutputStream os = response.getOutputStream();
+
+        os.println();
+        os.println("/* Apache Tuscany - SCA Web Widget */");
+        os.println();
+
+        writeSCAWidgetCode(os, request.getServletPath());
+    }
+
+    /**
+     */
+    private void writeSCAWidgetCode(ServletOutputStream out, String path) throws IOException {
+        out.println();
+        out.println("/* Apache Tuscany SCA Widget header */");
+        out.println();
+        
+        // remove the leading slash '/' character
+        path = path.substring(1);
+
+        for(ComponentReference reference : component.getReferences()) {
+            for(Binding binding : reference.getBindings()) {
+                String bindingProxyName = WidgetProxyHelper.getJavaScriptProxyFile(binding.getClass().getName());
+                if(bindingProxyName != null) {
+                    writeJavaScriptBindingProxy(out,bindingProxyName);
+                }
+            }
+        }
+        
+        writeJavaScriptReferenceFunction(out);
+        
+       
+        out.println();
+        out.println("/** End of Apache Tuscany SCA Widget */");
+        out.println();
+    }
+
+    /**
+     * Retrieve the binding proxy based on the bind name
+     * and embedded the javascript into this js
+     */
+    private void writeJavaScriptBindingProxy(ServletOutputStream os, String bindingProxyName) throws IOException {
+        
+        URL url = getClass().getClassLoader().getResource(bindingProxyName); //Thread.currentThread().getContextClassLoader().getResource(bindingProxyName);
+        InputStream is = url.openStream();
+        int i;
+        while ((i = is.read()) != -1) {
+            os.write(i);
+        }
+        os.println();
+        os.println();
+    }
+    
+    private void writeJavaScriptReferenceFunction (ServletOutputStream os) throws IOException {
+        
+        os.println("var referenceMap = new Object();");
+        for(ComponentReference reference : component.getReferences()) {
+            String referenceName = reference.getName();
+            Binding binding = reference.getBindings().get(0);
+            if (binding != null) {
+                
+                String proxyClient = WidgetProxyHelper.getJavaScriptProxyClient(binding.getClass().getName());
+                if(proxyClient != null) {
+                    
+                    //FIXME Eventually the binding URI should be initialized from the SCA domain
+                    // for now point to the target binding model directly, assuming that it's available
+                    // in the same node
+                    String targetURI = null;
+                    if (binding instanceof OptimizableBinding) {
+                        Binding targetBinding = ((OptimizableBinding)binding).getTargetBinding();
+                        if (targetBinding != null) {
+                            targetURI = URI.create(targetBinding.getURI()).getPath();
+                        }
+                    }
+                    if (targetURI == null) {
+                        targetURI = URI.create(binding.getURI()).getPath();
+                        if (!targetURI.startsWith("/")) {
+                            targetURI = "/" + targetURI;
+                        }
+                    }
+                    
+                    if(proxyClient.equals("JSONRpcClient")) {
+                        os.println("referenceMap." + referenceName + " = new " + proxyClient + "(\"" + targetURI + "\").Service;");
+                    } else {
+                        os.println("referenceMap." + referenceName + " = new " + proxyClient + "(\"" + targetURI + "\");");
+                    }
+                }                
+            }
+        }
+        
+        os.println("function Reference(name) {");
+        os.println("    return referenceMap[name];");
+        os.println("}");
+    }
+
+}