| /* |
| * 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.web.javascript; |
| |
| import java.io.IOException; |
| import java.lang.reflect.Constructor; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| |
| import javax.xml.namespace.QName; |
| |
| import org.apache.tuscany.sca.core.ExtensionPointRegistry; |
| import org.apache.tuscany.sca.core.UtilityExtensionPoint; |
| import org.apache.tuscany.sca.extensibility.ServiceDeclaration; |
| import org.apache.tuscany.sca.monitor.Monitor; |
| import org.apache.tuscany.sca.monitor.MonitorFactory; |
| |
| |
| /** |
| * Default extension point for widget component script generator |
| * |
| * @version $Rev$ $Date$ |
| */ |
| public class DefaultComponentJavaScriptGeneratorExtensionPoint implements ComponentJavaScriptGeneratorExtensionPoint { |
| private final List<ComponentJavaScriptGenerator> generators = new ArrayList<ComponentJavaScriptGenerator>(); |
| private final Map<QName, ComponentJavaScriptGenerator> generatorsByQName = new HashMap<QName, ComponentJavaScriptGenerator>(); |
| |
| private ExtensionPointRegistry extensionPoints; |
| private Monitor monitor = null; |
| |
| private boolean loaded = false; |
| |
| public DefaultComponentJavaScriptGeneratorExtensionPoint(ExtensionPointRegistry extensionPoints) { |
| this.extensionPoints = extensionPoints; |
| |
| UtilityExtensionPoint utilities = extensionPoints.getExtensionPoint(UtilityExtensionPoint.class); |
| MonitorFactory monitorFactory = utilities.getUtility(MonitorFactory.class); |
| if (monitorFactory != null) { |
| this.monitor = monitorFactory.createMonitor(); |
| } |
| } |
| |
| /** |
| * Report a exception. |
| * |
| * @param problems |
| * @param message |
| * @param model |
| */ |
| private void error(String message, Object model, Exception ex) { |
| /* |
| if (monitor != null) { |
| Problem problem = |
| monitor.createProblem(this.getClass().getName(), |
| Messages.RESOURCE_BUNDLE, |
| Severity.ERROR, |
| model, |
| message, |
| ex); |
| monitor.problem(problem); |
| } |
| */ |
| } |
| |
| public void addComponentJavaScriptGenerator(ComponentJavaScriptGenerator componentScriptGenerator) { |
| if (componentScriptGenerator.getQName() != null) { |
| generatorsByQName.put(componentScriptGenerator.getQName(), componentScriptGenerator); |
| } |
| |
| generators.add(componentScriptGenerator); |
| } |
| |
| public void removeComponentJavaScriptGenerator(ComponentJavaScriptGenerator componentScriptGenerator) { |
| if (componentScriptGenerator.getQName() != null) { |
| generatorsByQName.remove(componentScriptGenerator.getQName()); |
| } |
| |
| generators.remove(componentScriptGenerator); |
| } |
| |
| |
| public ComponentJavaScriptGenerator getComponentJavaScriptGenerator(QName bindingName) { |
| loadFactories(); |
| return generatorsByQName.get(bindingName); |
| } |
| |
| public List<ComponentJavaScriptGenerator> getComponentJavaScriptGenerators() { |
| loadFactories(); |
| return this.generators; |
| } |
| |
| /** |
| * Private Utility methods |
| */ |
| |
| |
| /** |
| * Lazily load artifact processors registered in the extension point. |
| */ |
| @SuppressWarnings("unchecked") |
| private synchronized void loadFactories() { |
| if (loaded) { |
| return; |
| } |
| |
| // Get the proxy factories declarations |
| Collection<ServiceDeclaration> factoryDeclarations = null; |
| try { |
| factoryDeclarations = extensionPoints.getServiceDiscovery().getServiceDeclarations(ComponentJavaScriptGenerator.class); |
| } catch (IOException e) { |
| IllegalStateException ie = new IllegalStateException(e); |
| error("IllegalStateException", factoryDeclarations, ie); |
| throw ie; |
| } |
| |
| for (ServiceDeclaration processorDeclaration : factoryDeclarations) { |
| // Create a factory, and register it |
| ComponentJavaScriptGenerator generator = null; |
| try { |
| Class generatorClass = processorDeclaration.loadClass(); |
| |
| Constructor<ComponentJavaScriptGenerator> constructor = generatorClass.getConstructor(ExtensionPointRegistry.class); |
| generator = constructor.newInstance(extensionPoints); |
| |
| } catch (Exception e) { |
| IllegalStateException ie = new IllegalStateException(e); |
| error("IllegalStateException", generator, ie); |
| throw ie; |
| } |
| |
| addComponentJavaScriptGenerator(generator); |
| } |
| |
| loaded = true; |
| } |
| |
| |
| } |