1   /**
2    * Copyright (c) 2000-2010 Liferay, Inc. All rights reserved.
3    *
4    * This library is free software; you can redistribute it and/or modify it under
5    * the terms of the GNU Lesser General Public License as published by the Free
6    * Software Foundation; either version 2.1 of the License, or (at your option)
7    * any later version.
8    *
9    * This library is distributed in the hope that it will be useful, but WITHOUT
10   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
11   * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
12   * details.
13   */
14  
15  package com.liferay.portal.bean;
16  
17  import java.lang.Object;
18  import java.lang.reflect.InvocationHandler;
19  import java.lang.reflect.InvocationTargetException;
20  import java.lang.reflect.Method;
21  
22  /**
23   * <a href="VelocityBeanHandler.java.html"><b><i>View Source</i></b></a>
24   *
25   * @author Brian Wing Shun Chan
26   */
27  public class VelocityBeanHandler implements InvocationHandler {
28  
29      public VelocityBeanHandler(Object bean, ClassLoader classLoader) {
30          _bean = bean;
31          _classLoader = classLoader;
32      }
33  
34      public Object getBean() {
35          return _bean;
36      }
37  
38      public ClassLoader getClassLoader() {
39          return _classLoader;
40      }
41  
42      public Object invoke(Object proxy, Method method, Object[] args)
43          throws Throwable {
44  
45          Thread currentThread = Thread.currentThread();
46  
47          ClassLoader contextClassLoader = currentThread.getContextClassLoader();
48  
49          try {
50              if ((_classLoader != null) &&
51                  (contextClassLoader != _classLoader)) {
52  
53                  currentThread.setContextClassLoader(_classLoader);
54              }
55  
56              return method.invoke(_bean, args);
57          }
58          catch (InvocationTargetException ite) {
59              return null;
60          }
61          finally {
62              if ((_classLoader != null) &&
63                  (contextClassLoader != _classLoader)) {
64  
65                  currentThread.setContextClassLoader(contextClassLoader);
66              }
67          }
68      }
69  
70      private Object _bean;
71      private ClassLoader _classLoader;
72  
73  }