PreviousAreaQuery


1   /*
2    *    Copyright 2004 Dusty Phillips
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  package com.buchuki.ensmer.prevayler.queries;
17  
18  import java.util.Date  ;
19  import com.buchuki.ensmer.prevayler.*;
20  import org.prevayler.*;
21  
22  /**
23   * Set up the Prevayler to change the current area to be the previous one in
24   * the history, and return the new area identifier
25   *
26   * @author   Dusty Phillips [dusty@buchuki.com]
27   */
28  public class PreviousAreaQuery implements TransactionWithQuery {
29  
30      /**
31       * Give it a SerialVersionUID so it can be reinstantiated by later versions
32       * of the class
33       */
34      static final long serialVersionUID = 20050328L;
35  
36      /**
37       * Execute the transaction
38       *
39       * @param system   the EnsmerPrevayler to operate on
40       * @param ignored  the time at which the transaction was executed; ignored in
41       *      this case
42       */
43      public Object   executeAndQuery(Object   system, Date   ignored) {
44          return ((EnsmerPrevayler) system).getAreaPrevayler().previousArea();
45      }
46  }
47  
48

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