View Javadoc

1   /*
2    * $Id: ActionController.java 471754 2006-11-06 14:55:09Z husted $
3    *
4    * Licensed to the Apache Software Foundation (ASF) under one
5    * or more contributor license agreements.  See the NOTICE file
6    * distributed with this work for additional information
7    * regarding copyright ownership.  The ASF licenses this file
8    * to you under the Apache License, Version 2.0 (the
9    * "License"); you may not use this file except in compliance
10   * with the License.  You may obtain a copy of the License at
11   *
12   *  http://www.apache.org/licenses/LICENSE-2.0
13   *
14   * Unless required by applicable law or agreed to in writing,
15   * software distributed under the License is distributed on an
16   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17   * KIND, either express or implied.  See the License for the
18   * specific language governing permissions and limitations
19   * under the License.
20   */
21  
22  package org.apache.struts.tiles;
23  
24  import java.io.IOException;
25  
26  import javax.servlet.ServletContext;
27  import javax.servlet.ServletException;
28  import javax.servlet.http.HttpServletRequest;
29  import javax.servlet.http.HttpServletResponse;
30  
31  import org.apache.struts.action.Action;
32  
33  /**
34   * Struts wrapper implementation of Controller.  This implementation wraps an
35   * <code>Action</code> in a <code>Controller</code>.
36   */
37  public class ActionController implements Controller {
38  
39      /**
40       * Struts action wrapped.
41       */
42      private Action action = null;
43  
44      /**
45       * Constructor.
46       *
47       * @param action Action to be wrapped.
48       */
49      public ActionController(Action action) {
50          this.action = action;
51      }
52  
53      /**
54       * Method associated to a tile and called immediately before tile is
55       * included.  This implementation calls a Struts Action. No servlet is
56       * set by this method.
57       *
58       * @param tileContext    Current tile context.
59       * @param request        Current request.
60       * @param response       Current response.
61       * @param servletContext Current servlet context.
62       */
63      public void perform(
64              ComponentContext tileContext,
65              HttpServletRequest request,
66              HttpServletResponse response,
67              ServletContext servletContext)
68              throws ServletException, IOException {
69  
70          try {
71              action.execute(null, null, request, response);
72  
73          } catch (Exception e) {
74              throw new ServletException(e);
75          }
76      }
77  
78      /**
79       * @see org.apache.struts.tiles.Controller#execute(org.apache.struts.tiles.ComponentContext, javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse, javax.servlet.ServletContext)
80       */
81      public void execute(
82              ComponentContext tileContext,
83              HttpServletRequest request,
84              HttpServletResponse response,
85              ServletContext servletContext)
86              throws Exception {
87  
88          this.action.execute(null, null, request, response);
89  
90      }
91  }