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Java > Open Source Codes > com > jcorporate > expresso > kernel > util > ClassLocator


1 package com.jcorporate.expresso.kernel.util;
2
3 /* ====================================================================
4  * The Jcorporate Apache Style Software License, Version 1.2 05-07-2002
5  *
6  * Copyright (c) 1995-2003 Jcorporate Ltd. All rights reserved.
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8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
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12  * 1. Redistributions of source code must retain the above copyright
13  * notice, this list of conditions and the following disclaimer.
14  *
15  * 2. Redistributions in binary form must reproduce the above copyright
16  * notice, this list of conditions and the following disclaimer in
17  * the documentation and/or other materials provided with the
18  * distribution.
19  *
20  * 3. The end-user documentation included with the redistribution,
21  * if any, must include the following acknowledgment:
22  * "This product includes software developed by Jcorporate Ltd.
23  * (http://www.jcorporate.com/)."
24  * Alternately, this acknowledgment may appear in the software itself,
25  * if and wherever such third-party acknowledgments normally appear.
26  *
27  * 4. "Jcorporate" and product names such as "Expresso" must
28  * not be used to endorse or promote products derived from this
29  * software without prior written permission. For written permission,
30  * please contact info@jcorporate.com.
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32  * 5. Products derived from this software may not be called "Expresso",
33  * or other Jcorporate product names; nor may "Expresso" or other
34  * Jcorporate product names appear in their name, without prior
35  * written permission of Jcorporate Ltd.
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40  * partners@jcorporate.com.
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42  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
43  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
44  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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54  * ====================================================================
55  *
56  * This software consists of voluntary contributions made by many
57  * individuals on behalf of the Jcorporate Ltd. Contributions back
58  * to the project(s) are encouraged when you make modifications.
59  * Please send them to support@jcorporate.com. For more information
60  * on Jcorporate Ltd. and its products, please see
61  * <http://www.jcorporate.com/>.
62  *
63  * Portions of this software are based upon other open source
64  * products and are subject to their respective licenses.
65  */
66
67 /**
68  * Utility class that first tries to locate a context class loader, and if that
69  * exists, then give that a try. Otherwise, use Class.forName() raw
70  *
71  * @author Michael Rimov
72  * @version $Revision: 1.4 $ on $Date: 2004/11/17 20:48:17 $
73  * @since Expresso 5.1
74  */
75
76 public class ClassLocator {
77
78     protected ClassLocator() {
79     }
80
81     /**
82      * Load a class by its name. Similar to Class.forName() except it looks for
83      * a context class loader and tries that if it exists. Otherwise it then
84      * just uses the default system classloader
85      *
86      * @param className the name of the class to load
87      * @return The loaded Class object
88      * @throws java.lang.ClassNotFoundException
89      * if we're unable to find the class
90      */
91     public static Class JavaDoc loadClass(String JavaDoc className) throws java.lang.ClassNotFoundException JavaDoc {
92         ClassLoader JavaDoc cl = Thread.currentThread().getContextClassLoader();
93         if (cl == null) {
94             return Class.forName(className);
95         } else {
96             return Class.forName(className, false, cl);
97         }
98     }
99 }
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