1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    * Permission is hereby granted, free of charge, to any person obtaining a copy
5    * of this software and associated documentation files (the "Software"), to deal
6    * in the Software without restriction, including without limitation the rights
7    * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8    * copies of the Software, and to permit persons to whom the Software is
9    * furnished to do so, subject to the following conditions:
10   *
11   * The above copyright notice and this permission notice shall be included in
12   * all copies or substantial portions of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.portlet.messageboards.util.comparator;
24  
25  import com.liferay.portal.kernel.util.DateUtil;
26  import com.liferay.portal.kernel.util.OrderByComparator;
27  import com.liferay.portlet.messageboards.model.MBMessage;
28  
29  /**
30   * <a href="MessageCreateDateComparator.java.html"><b><i>View Source</i></b></a>
31   *
32   * @author Brian Wing Shun Chan
33   *
34   */
35  public class MessageCreateDateComparator extends OrderByComparator {
36  
37      public static String ORDER_BY_ASC_1 = "createDate ASC";
38  
39      public static String ORDER_BY_DESC_1 = "createDate DESC";
40  
41      public static String ORDER_BY_ASC_2 = "MBMessage.createDate ASC";
42  
43      public static String ORDER_BY_DESC_2 = "MBMessage.createDate DESC";
44  
45      public MessageCreateDateComparator(boolean asc, boolean useTableNames) {
46          _asc = asc;
47          _useTableNames = useTableNames;
48      }
49  
50      public int compare(Object obj1, Object obj2) {
51          MBMessage message1 = (MBMessage)obj1;
52          MBMessage message2 = (MBMessage)obj2;
53  
54          int value = DateUtil.compareTo(
55              message1.getCreateDate(), message2.getCreateDate());
56  
57          if (_asc) {
58              return value;
59          }
60          else {
61              return -value;
62          }
63      }
64  
65      public String getOrderBy() {
66          if (_asc) {
67              if (_useTableNames) {
68                  return ORDER_BY_ASC_2;
69              }
70              else {
71                  return ORDER_BY_ASC_1;
72              }
73          }
74          else {
75              if (_useTableNames) {
76                  return ORDER_BY_DESC_2;
77              }
78              else {
79                  return ORDER_BY_DESC_1;
80              }
81          }
82      }
83  
84      private boolean _asc;
85      private boolean _useTableNames;
86  
87  }