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/*
 * JasperReports - Free Java Reporting Library.
 * Copyright (C) 2001 - 2023 Cloud Software Group, Inc. All rights reserved.
 * http://www.jaspersoft.com
 *
 * Unless you have purchased a commercial license agreement from Jaspersoft,
 * the following license terms apply:
 *
 * This program is part of JasperReports.
 *
 * JasperReports is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * JasperReports is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with JasperReports. If not, see .
 */
package net.sf.jasperreports.engine.util;

import java.net.URL;

/**
 * A composite classloader that has a parent classloader and an alternate
 * classloader.
 * 
 * 

* When resolving classes, the parent classloader is consulted first, and if * that classloader cannot find the class, the alternate/second classloader is * asked to resolve the class. * * @author Lucian Chirita ([email protected]) */ public class CompositeClassloader extends ClassLoader { private final ClassLoader fallback; /** * Creates a composite classloader. * * @param parent the parent classloader * @param fallback the alternate classloader */ public CompositeClassloader(ClassLoader parent, ClassLoader fallback) { super(parent); this.fallback = fallback; } @Override protected Class findClass(String name) throws ClassNotFoundException { // this method is only called when the parent classloader cannot // resolve the class, so we try the alternate classloder if (fallback != null) { return fallback.loadClass(name); } // throw ClassNotFoundException return super.findClass(name); } @Override protected URL findResource(String name) { if (fallback != null) { return fallback.getResource(name); } return super.findResource(name); } }





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