StatelessOnlyAddMethodInterceptor


1   /**
2    * EasyBeans
3    * Copyright (C) 2006 Bull S.A.S.
4    * Contact: easybeans@objectweb.org
5    *
6    * This library is free software; you can redistribute it and/or
7    * modify it under the terms of the GNU Lesser General Public
8    * License as published by the Free Software Foundation; either
9    * version 2.1 of the License, or any later version.
10   *
11   * This library is distributed in the hope that it will be useful,
12   * but WITHOUT ANY WARRANTY; without even the implied warranty of
13   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14   * Lesser General Public License for more details.
15   *
16   * You should have received a copy of the GNU Lesser General Public
17   * License along with this library; if not, write to the Free Software
18   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
19   * USA
20   *
21   * --------------------------------------------------------------------------
22   * $Id: StatelessOnlyAddMethodInterceptor.java 450 2006-05-12 15:30:25Z benoitf $
23   * --------------------------------------------------------------------------
24   */
25  
26  package org.objectweb.easybeans.examples.statelessbean;
27  
28  import java.lang.reflect.Method  ;
29  
30  import javax.interceptor.AroundInvoke;
31  import javax.interceptor.InvocationContext;
32  
33  
34  /**
35   * Simple interceptor class which should be launched only on add method.
36   * @author Florent Benoit
37   */
38  public class StatelessOnlyAddMethodInterceptor {
39  
40      /**
41       * Another class interceptor.
42       * @param invocationContext contains attributes of invocation
43       * @return method's invocation result
44       * @throws Exception if invocation fails
45       */
46      @AroundInvoke
47      public Object   onlyAdd(final InvocationContext invocationContext) throws Exception   {
48          System.out.println("Add interceptor");
49          Method   m = invocationContext.getMethod();
50          // Checks the method name
51          if (m.getName().equals("add")) {
52              System.out.println("Applied on the correct method");
53          } else {
54              throw new Exception  ("Error, should be only on add method while it is applied on '" + m.getName() + "' method.");
55          }
56          return invocationContext.proceed();
57      }
58  
59  }
60
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