/* | |
* Copyright 2005 The Apache Software Foundation | |
* | |
* Licensed 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.felix.mishell; | |
import java.util.List; | |
import javax.script.ScriptEngine; | |
import javax.script.ScriptEngineFactory; | |
/** | |
* This is a wrapper class for the ScriptEngineFactory class that deals with context class loader issues | |
* It is necessary because engines (at least ruby) use the context classloader to find their resources (i.e., their "native" classes) | |
* | |
*/ | |
public class OSGiScriptEngineFactory implements ScriptEngineFactory{ | |
private ScriptEngineFactory factory; | |
private ClassLoader contextClassLoader; | |
public OSGiScriptEngineFactory (ScriptEngineFactory factory, ClassLoader contextClassLoader){ | |
this.factory=factory; | |
this.contextClassLoader=contextClassLoader; | |
} | |
public String getEngineName() { | |
return factory.getEngineName(); | |
} | |
public String getEngineVersion() { | |
return factory.getEngineVersion(); | |
} | |
public List<String> getExtensions() { | |
return factory.getExtensions(); | |
} | |
public String getLanguageName() { | |
return factory.getLanguageName(); | |
} | |
public String getLanguageVersion() { | |
return factory.getLanguageVersion(); | |
} | |
public String getMethodCallSyntax(String obj, String m, String... args) { | |
return factory.getMethodCallSyntax(obj, m, args); | |
} | |
public List<String> getMimeTypes() { | |
return factory.getMimeTypes(); | |
} | |
public List<String> getNames() { | |
return factory.getNames(); | |
} | |
public String getOutputStatement(String toDisplay) { | |
return factory.getOutputStatement(toDisplay); | |
} | |
public Object getParameter(String key) { | |
return factory.getParameter(key); | |
} | |
public String getProgram(String... statements) { | |
return factory.getProgram(statements); | |
} | |
public ScriptEngine getScriptEngine() { | |
ScriptEngine engine=null; | |
if(contextClassLoader!=null){ | |
ClassLoader old=Thread.currentThread().getContextClassLoader(); | |
Thread.currentThread().setContextClassLoader(contextClassLoader); | |
engine=factory.getScriptEngine(); | |
Thread.currentThread().setContextClassLoader(old); | |
} | |
else engine=factory.getScriptEngine(); | |
return engine; | |
} | |
} |