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Glassfish example source code file (DelegatingClassLoader.java)
The Glassfish DelegatingClassLoader.java source code/* * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. * * Copyright (c) 2007-2010 Oracle and/or its affiliates. All rights reserved. * * The contents of this file are subject to the terms of either the GNU * General Public License Version 2 only ("GPL") or the Common Development * and Distribution License("CDDL") (collectively, the "License"). You * may not use this file except in compliance with the License. You can * obtain a copy of the License at * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html * or packager/legal/LICENSE.txt. See the License for the specific * language governing permissions and limitations under the License. * * When distributing the software, include this License Header Notice in each * file and include the License file at packager/legal/LICENSE.txt. * * GPL Classpath Exception: * Oracle designates this particular file as subject to the "Classpath" * exception as provided by Oracle in the GPL Version 2 section of the License * file that accompanied this code. * * Modifications: * If applicable, add the following below the License Header, with the fields * enclosed by brackets [] replaced by your own identifying information: * "Portions Copyright [year] [name of copyright owner]" * * Contributor(s): * If you wish your version of this file to be governed by only the CDDL or * only the GPL Version 2, indicate your decision by adding "[Contributor] * elects to include this software in this distribution under the [CDDL or GPL * Version 2] license." If you don't indicate a single choice of license, a * recipient has the option to distribute your version of this file under * either the CDDL, the GPL Version 2 or to extend the choice of license to * its licensees as provided above. However, if you add GPL Version 2 code * and therefore, elected the GPL Version 2 license, then the option applies * only if the new code is made subject to such option by the copyright * holder. */ package org.glassfish.internal.api; import com.sun.enterprise.module.common_impl.CompositeEnumeration; import java.util.List; import java.util.ArrayList; import java.util.Enumeration; import java.util.Collections; import java.net.URL; import java.io.IOException; /** * This classloader has a list of classloaders called as delegates * that it uses to find classes. All those delegates must have the * same parent as this classloader in order to have a consistent class space. * By consistent class space, I mean a class space where no two loaded class * have same name. An inconsistent class space can lead to ClassCastException. * This classloader does not define any class, classes are always loaded * either by its parent or by one of the delegates. * * @author Sanjeeb.Sahoo@Sun.COM */ public class DelegatingClassLoader extends ClassLoader { /* * TODO(Sahoo): * 1. I18N * 2. Move to a more common package, as it has no dependency on kernel. */ /** * findClass method of ClassLoader is usually a protected method. * Calling loadClass on a ClassLoader is expenssive, as it searches * the delegation hierarchy before searching in its private space. * Hence we add this interface as an optimization. */ public interface ClassFinder { /** * @see ClassLoader#getParent() */ ClassLoader getParent(); /** * @see ClassLoader#findClass(String) */ Class<?> findClass(String name) throws ClassNotFoundException; /** * @see ClassLoader#findLoadedClass(String) */ Class<?> findExistingClass(String name); /** * @see ClassLoader#findResource(String) */ URL findResource(String name); /** * @see ClassLoader#findResources(String) */ Enumeration<URL> findResources(String name) throws IOException; } /** * Name of this class loader. Used mostly for reporting purpose. * No guarantee about its uniqueness. */ private String name; private List<ClassFinder> delegates = new ArrayList Other Glassfish examples (source code examples)Here is a short list of links related to this Glassfish DelegatingClassLoader.java source code file: |
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