| /* |
| * 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.jsf.adapters; |
| |
| import org.apache.myfaces.extensions.scripting.core.api.WeavingContext; |
| import org.apache.myfaces.extensions.scripting.core.common.util.ClassUtils; |
| import org.apache.myfaces.extensions.scripting.core.engine.ThrowAwayClassloader; |
| import org.apache.myfaces.extensions.scripting.core.monitor.ClassResource; |
| import org.apache.myfaces.shared.util.ClassLoaderExtension; |
| |
| import javax.servlet.ServletContext; |
| import java.io.File; |
| import java.security.AccessController; |
| import java.security.PrivilegedActionException; |
| import java.security.PrivilegedExceptionAction; |
| |
| /** |
| * @author Werner Punz (latest modification by $Author$) |
| * @version $Revision$ $Date$ |
| * <p> </p> |
| * The chainloader docks onto the forName handler |
| * in the myfaces classutils which load the |
| * artifacting classes, we dock onto this extension point |
| * neutrally by indirection over the MyFacesSPI |
| */ |
| |
| public class CustomChainLoader extends ClassLoaderExtension |
| { |
| |
| ThrowAwayClassloader _loader = null; |
| |
| static class _Action implements PrivilegedExceptionAction<ThrowAwayClassloader> |
| { |
| ClassLoader _parent; |
| |
| _Action(ClassLoader parent) |
| { |
| this._parent = parent; |
| } |
| |
| public ThrowAwayClassloader run() |
| { |
| return new ThrowAwayClassloader(_parent); |
| } |
| } |
| |
| public CustomChainLoader(ServletContext context) |
| { |
| try |
| { |
| _loader = AccessController.doPrivileged( |
| new _Action(ClassUtils.getContextClassLoader()) |
| ); |
| } |
| catch (PrivilegedActionException e) |
| { |
| e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates. |
| } |
| } |
| |
| public Class forName(String name) |
| { |
| if (name.endsWith(";")) |
| { |
| name = name.substring(1, name.length() - 1); |
| } |
| |
| if (name.startsWith("java.")) /*the entire java namespace is reserved so no use to do a specific classloading check here*/ |
| return null; |
| if (name.startsWith("javax.")) /*the entire java namespace is reserved so no use to do a specific classloading check here*/ |
| return null; |
| else if (name.startsWith("com.sun")) /*internal java specific namespace*/ |
| return null; |
| else if (name.startsWith("sun.")) /*internal java specific namespace*/ |
| return null; |
| else if (name.startsWith("org.apache") && !name.startsWith("org.apache.myfaces")) |
| { |
| return null; |
| } else if (name.startsWith("org.apache") && name.startsWith("org.apache.myfaces.config")) |
| { |
| return null; |
| } else if (name.startsWith("org.apache") && name.startsWith("org.apache.myfaces.spi")) |
| { |
| return null; |
| } else if (name.startsWith("org.apache") && name.startsWith("org.apache.myfaces.application")) |
| { |
| return null; |
| } |
| // |
| try |
| { |
| return loadClass(name); |
| } |
| catch (ClassNotFoundException e) |
| { |
| return null; |
| } |
| } |
| |
| private Class loadClass(String name) throws ClassNotFoundException |
| { |
| File targetDirectory = WeavingContext.getInstance().getConfiguration().getCompileTarget(); |
| File target = ClassUtils.classNameToFile(targetDirectory.getAbsolutePath(), name); |
| if (!target.exists()) return null; |
| //otherwise check if tainted and if not simply return the class stored |
| |
| ClassResource resource = (ClassResource) WeavingContext.getInstance().getResource(name); |
| if (resource == null) |
| { |
| return null; |
| } |
| if (resource.isTainted() || resource.getAClass() == null) |
| { |
| //load the class via the throw away classloader |
| return _loader.loadClass(name); |
| } else |
| { |
| return resource.getAClass(); |
| } |
| |
| } |
| |
| } |