1   /**
2    * Copyright (c) 2000-2008 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.mail.util.comparator;
24  
25  import com.liferay.portal.kernel.util.DateUtil;
26  import com.liferay.portlet.mail.model.MailEnvelope;
27  
28  import java.util.Comparator;
29  
30  /**
31   * <a href="DateComparator.java.html"><b><i>View Source</i></b></a>
32   *
33   * @author Alexander Chow
34   *
35   */
36  public class DateComparator implements Comparator<MailEnvelope> {
37  
38      public DateComparator(boolean asc) {
39          _asc = asc;
40      }
41  
42      public int compare(MailEnvelope mailEnvelope1, MailEnvelope mailEnvelope2) {
43          int value = DateUtil.compareTo(
44              mailEnvelope1.getDate(), mailEnvelope2.getDate());
45  
46          if (value == 0) {
47              Long messageId1 = new Long(mailEnvelope1.getMessageId());
48              Long messageId2 = new Long(mailEnvelope2.getMessageId());
49  
50              value = messageId1.compareTo(messageId2);
51          }
52  
53          if (_asc) {
54              return value;
55          }
56          else {
57              return -value;
58          }
59      }
60  
61      private boolean _asc;
62  
63  }