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Java > Open Source Codes > com > caucho > bytecode > JClassLoaderWrapper


1 /*
2  * Copyright (c) 1998-2006 Caucho Technology -- all rights reserved
3  *
4  * This file is part of Resin(R) Open Source
5  *
6  * Each copy or derived work must preserve the copyright notice and this
7  * notice unmodified.
8  *
9  * Resin Open Source is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License, or
12  * (at your option) any later version.
13  *
14  * Resin Open Source is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
17  * of NON-INFRINGEMENT. See the GNU General Public License for more
18  * details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with Resin Open Source; if not, write to the
22  *
23  * Free Software Foundation, Inc.
24  * 59 Temple Place, Suite 330
25  * Boston, MA 02111-1307 USA
26  *
27  * @author Scott Ferguson
28  */
29
30 package com.caucho.bytecode;
31
32 import com.caucho.loader.EnvironmentLocal;
33
34 import java.util.logging.Level JavaDoc;
35
36 /**
37  * Managed introspected java classes.
38  */
39 public class JClassLoaderWrapper extends JClassLoader {
40   private static final
41     EnvironmentLocal<JClassLoaderWrapper> _localClassLoader =
42     new EnvironmentLocal<JClassLoaderWrapper>();
43   
44   private ClassLoader JavaDoc _loader;
45
46   /**
47    * Creates the class loader with a specific class loader.
48    */
49   private JClassLoaderWrapper(ClassLoader JavaDoc loader)
50   {
51     _loader = loader;
52   }
53
54   /**
55    * Creates the class loader with the context class loader.
56    */
57   public static JClassLoaderWrapper create()
58   {
59     return create(Thread.currentThread().getContextClassLoader());
60   }
61
62   /**
63    * Creates the class loader with the context class loader.
64    */
65   public static JClassLoaderWrapper create(ClassLoader JavaDoc loader)
66   {
67     JClassLoaderWrapper jLoader = _localClassLoader.getLevel(loader);
68     
69     if (jLoader == null) {
70       jLoader = new JClassLoaderWrapper(loader);
71       _localClassLoader.set(jLoader, loader);
72     }
73
74     return jLoader;
75   }
76
77   /**
78    * Loads the class.
79    */
80   protected JClass loadClass(String JavaDoc name)
81   {
82     try {
83       Class JavaDoc cl;
84
85       if (_loader != null)
86     cl = Class.forName(name, false, _loader);
87       else
88     cl = Class.forName(name);
89
90       return new JClassWrapper(cl, this);
91     } catch (ClassNotFoundException JavaDoc e) {
92       log.log(Level.FINE, e.toString(), e);
93
94       return null;
95     }
96   }
97
98   public String JavaDoc toString()
99   {
100     return "JClassLoaderWrapper[" + _loader + "]";
101   }
102 }
103
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