1 files changed, 144 insertions, 0 deletions
diff --git a/sca-java-2.x/tags/2.0.1-RC1/modules/implementation-widget-runtime/src/main/java/org/apache/tuscany/sca/implementation/widget/provider/WidgetImplementationInvoker.java b/sca-java-2.x/tags/2.0.1-RC1/modules/implementation-widget-runtime/src/main/java/org/apache/tuscany/sca/implementation/widget/provider/WidgetImplementationInvoker.java
new file mode 100644
index 0000000000..394f12c8b1
--- /dev/null
+++ b/sca-java-2.x/tags/2.0.1-RC1/modules/implementation-widget-runtime/src/main/java/org/apache/tuscany/sca/implementation/widget/provider/WidgetImplementationInvoker.java
@@ -0,0 +1,144 @@
+/*
+ * 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.io.UnsupportedEncodingException;
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.net.URLDecoder;
+
+import javax.servlet.http.HttpServletRequest;
+
+import org.apache.tuscany.sca.common.http.HTTPContext;
+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) {
+        HTTPContext bindingContext = (HTTPContext) msg.getBindingContext();
+        HttpServletRequest request = bindingContext.getHttpRequest();
+
+
+        // Get the request path
+        String pathInfo = request.getPathInfo();
+        String path = null;
+        
+        if(pathInfo != null) {
+            try {
+                path = URLDecoder.decode(pathInfo, "UTF-8");
+            } catch (UnsupportedEncodingException uee) {
+                //ignore for now
+            }            
+        }
+
+        // Get the resource id from the request message
+        String id = path == null ? "" : path.substring(1);
+        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);
+                writeResponse(bindingContext, url.openStream());
+                
+            } 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);
+                writeResponse(bindingContext, 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);
+                writeResponse(bindingContext, 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;
+    }
+    
+    /**
+     * Write the widget response to the http response outputstream
+     * @param bindingContext
+     * @param is
+     * @throws IOException 
+     */
+    private static void writeResponse(HTTPContext bindingContext, InputStream is) throws IOException {
+        OutputStream os = bindingContext.getHttpResponse().getOutputStream();
+        byte[] buffer = new byte[2048];
+        for (;;) {
+            int n = is.read(buffer);
+            if (n <= 0)
+                break;
+            os.write(buffer, 0, n);
+        }
+        os.flush();
+        os.close();        
+    }
+}