SimpleControllerHandlerAdapter


1   /*
2    * Copyright 2002-2007 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.mvc;
18  
19  import javax.servlet.http.HttpServletRequest  ;
20  import javax.servlet.http.HttpServletResponse  ;
21  
22  import org.springframework.web.servlet.HandlerAdapter;
23  import org.springframework.web.servlet.ModelAndView;
24  
25  /**
26   * Adapter to use the plain {@link Controller} workflow interface with
27   * the generic {@link org.springframework.web.servlet.DispatcherServlet}.
28   * Supports handlers that implement the {@link LastModified} interface.
29   *
30   * <p>This is an SPI class, not used directly by application code.
31   *
32   * @author Rod Johnson
33   * @author Juergen Hoeller
34   * @see org.springframework.web.servlet.DispatcherServlet
35   * @see Controller
36   * @see LastModified
37   * @see HttpRequestHandlerAdapter
38   */
39  public class SimpleControllerHandlerAdapter implements HandlerAdapter {
40  
41      public boolean supports(Object   handler) {
42          return (handler instanceof Controller);
43      }
44  
45      public ModelAndView handle(HttpServletRequest   request, HttpServletResponse   response, Object   handler)
46              throws Exception   {
47  
48          return ((Controller) handler).handleRequest(request, response);
49      }
50  
51      public long getLastModified(HttpServletRequest   request, Object   handler) {
52          if (handler instanceof LastModified) {
53              return ((LastModified) handler).getLastModified(request);
54          }
55          return -1L;
56      }
57  
58  }
59
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