HandlerInterceptorAdapter


1   /*
2    * Copyright 2002-2006 the original author or authors.
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    *      http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  
17  package org.springframework.web.servlet.handler;
18  
19  import javax.servlet.http.HttpServletRequest  ;
20  import javax.servlet.http.HttpServletResponse  ;
21  
22  import org.springframework.web.servlet.HandlerInterceptor;
23  import org.springframework.web.servlet.ModelAndView;
24  
25  /**
26   * Abstract adapter class for the HandlerInterceptor interface,
27   * for simplified implementation of pre-only/post-only interceptors.
28   *
29   * @author Juergen Hoeller
30   * @since 05.12.2003
31   */
32  public abstract class HandlerInterceptorAdapter implements HandlerInterceptor {
33  
34      /**
35       * This implementation always returns <code>true</code>.
36       */
37      public boolean preHandle(HttpServletRequest   request, HttpServletResponse   response, Object   handler)
38          throws Exception   {
39          return true;
40      }
41  
42      /**
43       * This implementation is empty.
44       */
45      public void postHandle(
46              HttpServletRequest   request, HttpServletResponse   response, Object   handler, ModelAndView modelAndView)
47              throws Exception   {
48      }
49  
50      /**
51       * This implementation is empty.
52       */
53      public void afterCompletion(
54              HttpServletRequest   request, HttpServletResponse   response, Object   handler, Exception   ex)
55              throws Exception   {
56      }
57  
58  }
59
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