1 files changed, 157 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/WidgetImplementationProvider.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/WidgetImplementationProvider.java
new file mode 100644
index 0000000000..28f041b919
--- /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/WidgetImplementationProvider.java
@@ -0,0 +1,157 @@
+/*
+ * 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 javax.xml.namespace.QName;
+
+import org.apache.tuscany.sca.assembly.Base;
+import org.apache.tuscany.sca.assembly.Binding;
+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.implementation.widget.javascript.WidgetImplementationJavascriptProvider;
+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 static final QName BINDING_HTTP = new QName(Base.SCA11_TUSCANY_NS, "binding.http");
+    
+    private RuntimeComponent component;
+    
+    private WidgetImplementationJavascriptProvider javascriptProvider;
+    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,
+                                 WidgetImplementationJavascriptProvider javascriptProvider,
+                                 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 baseURI = getBaseURI();
+
+        // this uses removeServletMapping / addServletMapping as there is no getServletMapping facility
+        scriptURI = URI.create(baseURI + "/" + 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);
+        }     
+
+        // If added to the class path, start dojo provider
+        if(javascriptProvider != null) {
+            javascriptProvider.start();
+        }
+        
+    }
+
+    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);
+        }
+        
+        if(javascriptProvider != null) {
+            javascriptProvider.stop();
+        }
+    }
+    
+
+    /**
+     * Get the contextRoot considering the HTTP Binding URI when in a embedded environment
+     * @return
+     */
+    private String getBaseURI() {
+        String baseURI = null;
+        String contextPath = "/";
+        if (servletHost != null) {
+            contextPath = servletHost.getContextPath();
+        }
+        if (!contextPath.endsWith("/")) {
+            contextPath = contextPath + "/";
+        }
+
+        ComponentService service = component.getService("Widget");
+        if (service != null) {
+            for (Binding binding : service.getBindings()) {
+                if (binding.getType().equals(BINDING_HTTP)) {
+                    String bindingURI = binding.getURI();
+                    URI uri = URI.create(bindingURI);
+                    if (uri.isAbsolute()) {
+                        return bindingURI;
+                    }
+                    if (bindingURI.startsWith("/")) {
+                        bindingURI = bindingURI.substring(1);
+                    }
+                    baseURI = contextPath + bindingURI;
+                }
+            }
+        }
+
+        return baseURI == null ? "" : baseURI;
+    }
+
+}