ActionController


1   /*
2    * $Id: ActionController.java 54929 2004-10-16 16:38:42Z germuska $ 
3    *
4    * Copyright 1999-2004 The Apache Software Foundation.
5    * 
6    * Licensed under the Apache License, Version 2.0 (the "License");
7    * you may not use this file except in compliance with the License.
8    * You may obtain a copy of the License at
9    * 
10   *      http://www.apache.org/licenses/LICENSE-2.0
11   * 
12   * Unless required by applicable law or agreed to in writing, software
13   * distributed under the License is distributed on an "AS IS" BASIS,
14   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15   * See the License for the specific language governing permissions and
16   * limitations under the License.
17   */
18  
19  package org.apache.struts.tiles;
20  
21  import java.io.IOException  ;
22  
23  import javax.servlet.ServletContext  ;
24  import javax.servlet.ServletException  ;
25  import javax.servlet.http.HttpServletRequest  ;
26  import javax.servlet.http.HttpServletResponse  ;
27  
28  import org.apache.struts.action.Action;
29  
30  /**
31   * Struts wrapper implementation of Controller.  This implementation wraps an 
32   * <code>Action</code> in a <code>Controller</code>.
33   */
34  public class ActionController implements Controller {
35  
36      /** 
37       * Struts action wrapped. 
38       */
39      private Action action = null;
40  
41      /**
42       * Constructor.
43       * @param action Action to be wrapped.
44       */
45      public ActionController(Action action) {
46          this.action = action;
47      }
48  
49      /**
50       * Method associated to a tile and called immediately before tile is 
51       * included.  This implementation calls a Struts Action. No servlet is 
52       * set by this method.
53       *
54       * @param tileContext Current tile context.
55       * @param request Current request.
56       * @param response Current response.
57       * @param servletContext Current servlet context.
58       */
59      public void perform(
60          ComponentContext tileContext,
61          HttpServletRequest   request,
62          HttpServletResponse   response,
63          ServletContext   servletContext)
64          throws ServletException  , IOException   {
65  
66          try {
67              action.execute(null, null, request, response);
68  
69          } catch (Exception   e) {
70              throw new ServletException  (e);
71          }
72      }
73  
74      /**
75       * @see org.apache.struts.tiles.Controller#execute(org.apache.struts.tiles.ComponentContext, javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse, javax.servlet.ServletContext)
76       */
77      public void execute(
78          ComponentContext tileContext,
79          HttpServletRequest   request,
80          HttpServletResponse   response,
81          ServletContext   servletContext)
82          throws Exception   {
83              
84          this.action.execute(null, null, request, response);
85  
86      }
87  }
88
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