01: /*
02: * Copyright 2006 Sun Microsystems, Inc. All Rights Reserved.
03: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
04: *
05: * This code is free software; you can redistribute it and/or modify it
06: * under the terms of the GNU General Public License version 2 only, as
07: * published by the Free Software Foundation. Sun designates this
08: * particular file as subject to the "Classpath" exception as provided
09: * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22: * CA 95054 USA or visit www.sun.com if you need additional information or
23: * have any questions.
24: */
25:
26: /*
27: * @(#)$Id: Which.java,v 1.1 2005/04/15 20:03:51 kohsuke Exp $
28: */
29:
30: package com.sun.xml.internal.bind.util;
31:
32: import java.net.URL;
33:
34: /**
35: * Finds out where a class file is loaded from.
36: *
37: * @author
38: * Kohsuke Kawaguchi (kohsuke.kawaguchi@sun.com)
39: */
40: public class Which {
41:
42: public static String which(Class clazz) {
43: return which(clazz.getName(), clazz.getClassLoader());
44: }
45:
46: /**
47: * Search the specified classloader for the given classname.
48: *
49: * @param classname the fully qualified name of the class to search for
50: * @param loader the classloader to search
51: * @return the source location of the resource, or null if it wasn't found
52: */
53: public static String which(String classname, ClassLoader loader) {
54:
55: String classnameAsResource = classname.replace('.', '/')
56: + ".class";
57:
58: if (loader == null) {
59: loader = ClassLoader.getSystemClassLoader();
60: }
61:
62: URL it = loader.getResource(classnameAsResource);
63: if (it != null) {
64: return it.toString();
65: } else {
66: return null;
67: }
68: }
69:
70: }
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