1   /**
2    * Copyright (c) 2000-2010 Liferay, Inc. All rights reserved.
3    *
4    * This library is free software; you can redistribute it and/or modify it under
5    * the terms of the GNU Lesser General Public License as published by the Free
6    * Software Foundation; either version 2.1 of the License, or (at your option)
7    * any later version.
8    *
9    * This library is distributed in the hope that it will be useful, but WITHOUT
10   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
11   * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
12   * details.
13   */
14  
15  package com.liferay.portlet.journal.util.comparator;
16  
17  import com.liferay.portal.kernel.util.OrderByComparator;
18  import com.liferay.portlet.journal.model.JournalArticle;
19  
20  /**
21   * <a href="ArticleIDComparator.java.html"><b><i>View Source</i></b></a>
22   *
23   * @author Brian Wing Shun Chan
24   */
25  public class ArticleIDComparator extends OrderByComparator {
26  
27      public static String ORDER_BY_ASC = "articleId ASC, version ASC";
28  
29      public static String ORDER_BY_DESC = "articleId DESC, version DESC";
30  
31      public static String[] ORDER_BY_FIELDS = {"articleId", "version"};
32  
33      public ArticleIDComparator() {
34          this(false);
35      }
36  
37      public ArticleIDComparator(boolean asc) {
38          _asc = asc;
39      }
40  
41      public int compare(Object obj1, Object obj2) {
42          JournalArticle article1 = (JournalArticle)obj1;
43          JournalArticle article2 = (JournalArticle)obj2;
44  
45          int value = article1.getArticleId().toLowerCase().compareTo(
46              article2.getArticleId().toLowerCase());
47  
48          if (value == 0) {
49              if (article1.getVersion() < article2.getVersion()) {
50                  value = -1;
51              }
52              else if (article1.getVersion() > article2.getVersion()) {
53                  value = 1;
54              }
55          }
56  
57          if (_asc) {
58              return value;
59          }
60          else {
61              return -value;
62          }
63      }
64  
65      public String getOrderBy() {
66          if (_asc) {
67              return ORDER_BY_ASC;
68          }
69          else {
70              return ORDER_BY_DESC;
71          }
72      }
73  
74      public String[] getOrderByFields() {
75          return ORDER_BY_FIELDS;
76      }
77  
78      public boolean isAscending() {
79          return _asc;
80      }
81  
82      private boolean _asc;
83  
84  }