1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    * The contents of this file are subject to the terms of the Liferay Enterprise
5    * Subscription License ("License"). You may not use this file except in
6    * compliance with the License. You can obtain a copy of the License by
7    * contacting Liferay, Inc. See the License for the specific language governing
8    * permissions and limitations under the License, including but not limited to
9    * distribution rights of the Software.
10   *
11   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
12   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
13   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
14   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
15   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
16   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
17   * SOFTWARE.
18   */
19  
20  package com.liferay.portlet.messageboards.util.comparator;
21  
22  import com.liferay.portal.kernel.util.DateUtil;
23  import com.liferay.portal.kernel.util.OrderByComparator;
24  import com.liferay.portlet.messageboards.model.MBMessage;
25  
26  /**
27   * <a href="MessageCreateDateComparator.java.html"><b><i>View Source</i></b></a>
28   *
29   * @author Brian Wing Shun Chan
30   *
31   */
32  public class MessageCreateDateComparator extends OrderByComparator {
33  
34      public static String ORDER_BY_ASC_1 = "createDate ASC";
35  
36      public static String ORDER_BY_DESC_1 = "createDate DESC";
37  
38      public static String ORDER_BY_ASC_2 = "MBMessage.createDate ASC";
39  
40      public static String ORDER_BY_DESC_2 = "MBMessage.createDate DESC";
41  
42      public MessageCreateDateComparator(boolean asc, boolean useTableNames) {
43          _asc = asc;
44          _useTableNames = useTableNames;
45      }
46  
47      public int compare(Object obj1, Object obj2) {
48          MBMessage message1 = (MBMessage)obj1;
49          MBMessage message2 = (MBMessage)obj2;
50  
51          int value = DateUtil.compareTo(
52              message1.getCreateDate(), message2.getCreateDate());
53  
54          if (_asc) {
55              return value;
56          }
57          else {
58              return -value;
59          }
60      }
61  
62      public String getOrderBy() {
63          if (_asc) {
64              if (_useTableNames) {
65                  return ORDER_BY_ASC_2;
66              }
67              else {
68                  return ORDER_BY_ASC_1;
69              }
70          }
71          else {
72              if (_useTableNames) {
73                  return ORDER_BY_DESC_2;
74              }
75              else {
76                  return ORDER_BY_DESC_1;
77              }
78          }
79      }
80  
81      private boolean _asc;
82      private boolean _useTableNames;
83  
84  }