| /* |
| * 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.myfaces.extensions.scripting.mojarra.common; |
| |
| import org.apache.myfaces.extensions.scripting.core.engine.ThrowAwayClassloader; |
| |
| /** |
| * @author Werner Punz (latest modification by $Author$) |
| * @version $Revision$ $Date$ |
| */ |
| |
| public class ClassLoaderUtils extends org.apache.myfaces.extensions.scripting.core.common.util.ClassLoaderUtils |
| { |
| static ClassLoader _oldClassLoader = null; |
| |
| public static void registerThrowAwayClassloader() |
| { |
| //we do not have the luxury of a pluggable classloading extensions like in myfaces |
| // instead we have to provide our own classloader which is hooked in from time to time into the running system |
| ClassLoader loader = org.apache.myfaces.extensions.scripting.core.common.util.ClassLoaderUtils.getDefaultClassLoader(); |
| boolean found = false; |
| ClassLoader parent = loader; |
| while(parent != null && !found) { |
| found = parent instanceof ThrowAwayClassloader; |
| if(!found) { |
| parent = parent.getParent(); |
| } |
| } |
| if(found) { |
| return; |
| } |
| //in case of an unchanged classloader we can recycle our old throw away classloader |
| if(_oldClassLoader != null && loader.equals(_oldClassLoader.getParent())) { |
| Thread.currentThread().setContextClassLoader(_oldClassLoader); |
| } else { |
| _oldClassLoader = new ThrowAwayClassloader(loader); |
| Thread.currentThread().setContextClassLoader(_oldClassLoader); |
| } |
| } |
| |
| } |