/*
* Copyright (c) 2008-2013, Hazelcast, Inc. All Rights Reserved.
*
* 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 com.hazelcast.osgi;
import javax.script.
ScriptEngine;
import javax.script.
ScriptEngineFactory;
import java.util.
List;
/**
* 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)
*/
/*
Imported from Apache Felix project.
http://svn.apache.org/repos/asf/felix/trunk/mishell/src/main/java/org/apache/felix/mishell/OSGiScriptEngineFactory.java
*/
public class
OSGiScriptEngineFactory implements
ScriptEngineFactory {
private
ScriptEngineFactory factory;
private
ClassLoader contextClassLoader;
public
OSGiScriptEngineFactory(
ScriptEngineFactory factory,
ClassLoader contextClassLoader) {
this.
factory =
factory;
this.
contextClassLoader =
contextClassLoader;
}
@
Override
public
String getEngineName() {
return
factory.
getEngineName();
}
@
Override
public
String getEngineVersion() {
return
factory.
getEngineVersion();
}
@
Override
public
List<
String>
getExtensions() {
return
factory.
getExtensions();
}
@
Override
public
String getLanguageName() {
return
factory.
getLanguageName();
}
@
Override
public
String getLanguageVersion() {
return
factory.
getLanguageVersion();
}
@
Override
public
String getMethodCallSyntax(
String obj,
String m,
String...
args) {
return
factory.
getMethodCallSyntax(
obj,
m,
args);
}
@
Override
public
List<
String>
getMimeTypes() {
return
factory.
getMimeTypes();
}
@
Override
public
List<
String>
getNames() {
return
factory.
getNames();
}
@
Override
public
String getOutputStatement(
String toDisplay) {
return
factory.
getOutputStatement(
toDisplay);
}
@
Override
public
Object getParameter(
String key) {
return
factory.
getParameter(
key);
}
@
Override
public
String getProgram(
String...
statements) {
return
factory.
getProgram(
statements);
}
@
Override
public
ScriptEngine getScriptEngine() {
ScriptEngine engine;
if (
contextClassLoader == null) {
engine =
factory.
getScriptEngine();
} else {
Thread currentThread =
Thread.
currentThread();
ClassLoader old =
currentThread.
getContextClassLoader();
currentThread.
setContextClassLoader(
contextClassLoader);
engine =
factory.
getScriptEngine();
currentThread.
setContextClassLoader(
old);
}
return
engine;
}
}