1 /* 2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package com.sun.xml.internal.bind.util; 27 28 import java.net.URL; 29 30 /** 31 * Finds out where a class file is loaded from. 32 * 33 * @author 34 * Kohsuke Kawaguchi (kohsuke.kawaguchi@sun.com) 35 */ 36 public class Which { 37 38 public static String which( Class clazz ) { 39 return which( clazz.getName(), SecureLoader.getClassClassLoader(clazz)); 40 } 41 42 /** 43 * Search the specified classloader for the given classname. 44 * 45 * @param classname the fully qualified name of the class to search for 46 * @param loader the classloader to search 47 * @return the source location of the resource, or null if it wasn't found 48 */ 49 public static String which(String classname, ClassLoader loader) { 50 51 String classnameAsResource = classname.replace('.', '/') + ".class"; 52 53 if(loader == null) { 54 loader = SecureLoader.getSystemClassLoader(); 55 } 56 57 URL it = loader.getResource(classnameAsResource); 58 if (it != null) { 59 return it.toString(); 60 } else { 61 return null; 62 } 63 } 64 65 }