1 /*
2  * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4  *
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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.
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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
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19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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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 
which( Class clazz )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      */
which(String classname, ClassLoader loader)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 }
66