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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.util.List;
import java.util.Map;
import org.apache.bsf.BSFEngine;
import org.apache.bsf.BSFException;
import org.apache.bsf.BSFManager;
import org.apache.tuscany.container.script.helper.ScriptHelperInstanceFactory;
import org.apache.tuscany.spi.ObjectCreationException;
/**
* ScriptInstanceFactory creates ScriptInstances for a script
*/
public class ScriptInstanceFactory extends ScriptHelperInstanceFactory<ScriptInstance>{
private String className;
private String scriptSource;
public ScriptInstanceFactory(String resourceName, String className, String scriptSource, ClassLoader classLoader) {
super(resourceName, classLoader);
this.className = className;
this.scriptSource = scriptSource;
}
/**
* Create a new invokeable instance of the script
*
* @param context
* objects to add to scope of the script instance
* @return a RhinoScriptInstance
*/
public ScriptInstance createInstance(List<Class> services, Map<String, Object> context) {
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));
}
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 ScriptInstance(bsfEngine, clazz);
} catch (BSFException e) {
if (e.getTargetException() != null) {
throw new ObjectCreationException(e.getTargetException());
}
throw new ObjectCreationException(e.getTargetException());
}
}
}
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