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1   /*
2    * $Id: InterceptorAdapter.java 11130 2008-02-29 15:14:53Z acooke $
3    * --------------------------------------------------------------------------------------
4    * Copyright (c) MuleSource, Inc.  All rights reserved.  http://www.mulesource.com
5    *
6    * The software in this package is published under the terms of the CPAL v1.0
7    * license, a copy of which has been included with this distribution in the
8    * LICENSE.txt file.
9    */
10  
11  package org.mule.module.spring.interceptor;
12  
13  import org.mule.api.interceptor.Interceptor;
14  import org.mule.api.MuleMessage;
15  
16  import org.aopalliance.intercept.MethodInterceptor;
17  import org.aopalliance.intercept.MethodInvocation;
18  
19  /**
20   * This adapts an implementation of the {@link Interceptor} interface for use with the Spring AOP
21   * interceptor framework.  Note that the Interceptor implementation can return null if it does not
22   * want to change the result - the appropriate {@link MuleMessage} will then be constructed correctly
23   * by Mule.
24   */
25  public class InterceptorAdapter implements MethodInterceptor
26  {
27  
28      private Interceptor interceptor;
29  
30      public Object invoke(MethodInvocation invocation) throws Throwable
31      {
32          InvocationAdapter adapter = new InvocationAdapter(invocation);
33          MuleMessage message = interceptor.intercept(adapter);
34          if (null == message)
35          {
36              return adapter.getResult();
37          }
38          else
39          {
40              return message;
41          }
42      }
43  
44      public void setInterceptor(Interceptor interceptor)
45      {
46          this.interceptor = interceptor;
47      }
48  
49  }