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/*
* 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;
}
}
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