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 invoke(Object proxy, Method method, Object[] args)
35          throws Throwable {
36  
37          Thread currentThread = Thread.currentThread();
38  
39          ClassLoader contextClassLoader = currentThread.getContextClassLoader();
40  
41          try {
42              if ((_classLoader != null) &&
43                  (contextClassLoader != _classLoader)) {
44  
45                  currentThread.setContextClassLoader(_classLoader);
46              }
47  
48              return method.invoke(_bean, args);
49          }
50          catch (InvocationTargetException ite) {
51              return null;
52          }
53          finally {
54              if ((_classLoader != null) &&
55                  (contextClassLoader != _classLoader)) {
56  
57                  currentThread.setContextClassLoader(contextClassLoader);
58              }
59          }
60      }
61  
62      private Object _bean;
63      private ClassLoader _classLoader;
64  
65  }