1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    * Permission is hereby granted, free of charge, to any person obtaining a copy
5    * of this software and associated documentation files (the "Software"), to deal
6    * in the Software without restriction, including without limitation the rights
7    * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8    * copies of the Software, and to permit persons to whom the Software is
9    * furnished to do so, subject to the following conditions:
10   *
11   * The above copyright notice and this permission notice shall be included in
12   * all copies or substantial portions of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.portal.bean;
24  
25  import java.lang.Object;
26  import java.lang.reflect.InvocationHandler;
27  import java.lang.reflect.InvocationTargetException;
28  import java.lang.reflect.Method;
29  
30  /**
31   * <a href="VelocityBeanHandler.java.html"><b><i>View Source</i></b></a>
32   *
33   * @author Brian Wing Shun Chan
34   */
35  public class VelocityBeanHandler implements InvocationHandler {
36  
37      public VelocityBeanHandler(Object bean, ClassLoader classLoader) {
38          _bean = bean;
39          _classLoader = 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  }