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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.container.script;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.tuscany.spi.ObjectCreationException;
import org.apache.tuscany.spi.ObjectFactory;
import org.apache.bsf.BSFEngine;
import org.apache.bsf.BSFException;
import org.apache.bsf.BSFManager;
/**
* ScriptFactory creates ScriptInstances for a script
*/
public class ScriptInstanceFactory implements ObjectFactory<ScriptInstance> {
protected String resourceName;
protected ClassLoader classLoader;
private String className;
private String scriptSource;
private Map<String, ObjectFactory> contextObjects;
public ScriptInstanceFactory(String resourceName,
String className,
String scriptSource,
ClassLoader classLoader) {
this.resourceName = resourceName;
this.classLoader = classLoader;
this.className = className;
this.scriptSource = scriptSource;
this.contextObjects = new HashMap<String, ObjectFactory>();
}
/**
* Create a new invokeable instance of the script
* <p/>
* objects to add to scope of the script instance
*
* @return a RhinoScriptInstance
*/
//public ScriptInstanceImpl createInstance(List<Class<?>> serviceBindings, Map<String, Object> context) {
public ScriptInstance getInstance() throws ObjectCreationException {
try {
//TODO: this uses a new manager and recompiles the scrip each time, may be able to optimize
// but need to be careful about instance scoping
BSFManager bsfManager = new BSFManager();
bsfManager.setClassLoader(BSFManager.class.getClassLoader());
// TODO: hack to get Ruby working with the standalone launcher
Thread.currentThread().setContextClassLoader(BSFManager.class.getClassLoader());
// // register any context objects (SCA properties and references)
// for (String beanName : context.keySet()) {
// bsfManager.registerBean(beanName, context.get(beanName));
// }
// register any context objects (SCA properties and references)
for (Map.Entry<String, ObjectFactory> entry : contextObjects.entrySet()) {
bsfManager.registerBean(entry.getKey(), entry.getValue().getInstance());
}
String scriptLanguage = BSFManager.getLangFromFilename(resourceName);
BSFEngine bsfEngine = bsfManager.loadScriptingEngine(scriptLanguage);
bsfEngine.exec(resourceName, 0, 0, scriptSource);
// if there's a className then get the class object
Object clazz = null;
if (className != null) {
// special case for Ruby which requires a .new call
if ("ruby".equals(scriptLanguage)) {
clazz = bsfEngine.eval(null, 1, 1, className + ".new");
} else {
clazz = bsfEngine.call(null, className, null);
}
}
return new ScriptInstanceImpl(bsfEngine, clazz);
} catch (BSFException e) {
if (e.getTargetException() != null) {
throw new ObjectCreationException(e.getTargetException());
}
throw new ObjectCreationException(e.getTargetException());
}
}
public String getResourceName() {
return resourceName;
}
public ClassLoader getClassLoader() {
return classLoader;
}
protected Map<String, Class> getResponseClasses(List<Class> services) {
Map<String, Class> responseClasses = new HashMap<String, Class>();
if (services != null) {
for (Class s : services) {
for (Method m : s.getMethods()) {
responseClasses.put(m.getName(), m.getReturnType());
}
}
}
return responseClasses;
}
public void addContextObjectFactory(String name, ObjectFactory<?> factory) {
contextObjects.put(name, factory);
}
}
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