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1   /*
2    * $Id$
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.tiles2.preparer;
23  
24  import org.apache.struts.action.Action;
25  import org.apache.tiles.AttributeContext;
26  import org.apache.tiles.preparer.PreparerException;
27  import org.apache.tiles.preparer.ViewPreparer;
28  import org.apache.tiles.request.Request;
29  import org.apache.tiles.request.jakarta.servlet.ServletRequest;
30  
31  
32  /**
33   * Struts wrapper implementation of Controller.  This implementation wraps an
34   * <code>Action</code> in a <code>Controller</code>.
35   */
36  public class ActionPreparer implements ViewPreparer {
37  
38      /**
39       * Struts action wrapped.
40       */
41      private Action action = null;
42  
43      /**
44       * Constructor.
45       *
46       * @param action Action to be wrapped.
47       */
48      public ActionPreparer(Action action) {
49          this.action = action;
50      }
51  
52      /** {@inheritDoc} */
53      public void execute(Request tilesContext,
54              AttributeContext attributeContext) throws PreparerException {
55          if (tilesContext instanceof ServletRequest) {
56              ServletRequest servletTilesContext =
57                      (ServletRequest) tilesContext;
58              try {
59                  this.action.execute(null, null, servletTilesContext.getRequest(),
60                          servletTilesContext.getResponse());
61              } catch (Exception e) {
62                  throw new PreparerException(
63                          "The enclosed action threw an exception", e);
64              }
65          } else {
66              throw new PreparerException("Not using a ServletTilesRequestContext");
67          }
68      }
69  }