Mercurial > hg > blitz_condensed
view src/com/go/trove/util/DelegateClassLoader.java @ 0:3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
author | Dan Creswell <dan.creswell@gmail.com> |
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date | Sat, 21 Mar 2009 11:00:06 +0000 |
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/* ==================================================================== * Trove - Copyright (c) 1997-2000 Walt Disney Internet Group * ==================================================================== * The Tea Software License, Version 1.1 * * Copyright (c) 2000 Walt Disney Internet Group. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * 3. The end-user documentation included with the redistribution, * if any, must include the following acknowledgment: * "This product includes software developed by the * Walt Disney Internet Group (http://opensource.go.com/)." * Alternately, this acknowledgment may appear in the software itself, * if and wherever such third-party acknowledgments normally appear. * * 4. The names "Tea", "TeaServlet", "Kettle", "Trove" and "BeanDoc" must * not be used to endorse or promote products derived from this * software without prior written permission. For written * permission, please contact opensource@dig.com. * * 5. Products derived from this software may not be called "Tea", * "TeaServlet", "Kettle" or "Trove", nor may "Tea", "TeaServlet", * "Kettle", "Trove" or "BeanDoc" appear in their name, without prior * written permission of the Walt Disney Internet Group. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE WALT DISNEY INTERNET GROUP OR ITS * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * ==================================================================== * * For more information about Tea, please see http://opensource.go.com/. */ package com.go.trove.util; import java.io.InputStream; import java.net.URL; /****************************************************************************** * ClassLoader that delegates class loading requests if the parent ClassLoader * (and its ancestors) can't fulfill the request. Class loading requests are * handed off to scouts, which are called upon in sequence to find the class, * until the class is found. If neither the parent or scouts can find a * requested class, a normal ClassNotFoundException is thrown. * * @author Brian S O'Neill * @version * <!--$$Revision: 1.1 $-->, <!--$$JustDate:--> 7/27/01 <!-- $--> */ public class DelegateClassLoader extends ClassLoader { private ClassLoader[] mScouts; /** * @param parent ClassLoader that gets first chance to load a class * @param scouts ClassLoaders that get next chances to load a class, if the * parent couldn't find it. */ public DelegateClassLoader(ClassLoader parent, ClassLoader[] scouts) { super(parent); mScouts = (ClassLoader[])scouts.clone(); } /** * @param scouts ClassLoaders that get next chances to load a class, if the * parent couldn't find it. * @deprecated Actual parent ClassLoader must always be provided to prevent * unexpected behavior. */ public DelegateClassLoader(ClassLoader[] scouts) { super(); mScouts = (ClassLoader[])scouts.clone(); } protected synchronized Class findClass(String name) throws ClassNotFoundException { for (int i=0; i<mScouts.length; i++) { try { return mScouts[i].loadClass(name); } catch (ClassNotFoundException e) { } } throw new ClassNotFoundException(name); } protected URL findResource(String name) { URL resource = null; try { for (int i=0; i<mScouts.length; i++) { resource = mScouts[i].getResource(name); if (resource != null) { return resource; } } } catch (Exception e) { e.printStackTrace(); } return resource; } }