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.journal.util.comparator;
24  
25  import com.liferay.portal.kernel.util.DateUtil;
26  import com.liferay.portal.kernel.util.OrderByComparator;
27  import com.liferay.portlet.journal.model.JournalArticle;
28  
29  /**
30   * <a href="ArticleDisplayDateComparator.java.html"><b><i>View Source</i></b>
31   * </a>
32   *
33   * @author Brian Wing Shun Chan
34   *
35   */
36  public class ArticleDisplayDateComparator extends OrderByComparator {
37  
38      public static String ORDER_BY_ASC = "displayDate ASC, version ASC";
39  
40      public static String ORDER_BY_DESC = "displayDate DESC, version DESC";
41  
42      public ArticleDisplayDateComparator() {
43          this(false);
44      }
45  
46      public ArticleDisplayDateComparator(boolean asc) {
47          _asc = asc;
48      }
49  
50      public int compare(Object obj1, Object obj2) {
51          JournalArticle article1 = (JournalArticle)obj1;
52          JournalArticle article2 = (JournalArticle)obj2;
53  
54          int value = DateUtil.compareTo(
55              article1.getDisplayDate(), article2.getDisplayDate());
56  
57          if (value == 0) {
58              if (article1.getVersion() < article2.getVersion()) {
59                  value = -1;
60              }
61              else if (article1.getVersion() > article2.getVersion()) {
62                  value = 1;
63              }
64          }
65  
66          if (_asc) {
67              return value;
68          }
69          else {
70              return -value;
71          }
72      }
73  
74      public String getOrderBy() {
75          if (_asc) {
76              return ORDER_BY_ASC;
77          }
78          else {
79              return ORDER_BY_DESC;
80          }
81      }
82  
83      private boolean _asc;
84  
85  }