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.blogs.util.comparator;
24  
25  import com.liferay.portal.kernel.util.DateUtil;
26  import com.liferay.portal.kernel.util.OrderByComparator;
27  import com.liferay.portlet.blogs.model.BlogsEntry;
28  
29  /**
30   * <a href="EntryDisplayDateComparator.java.html"><b><i>View Source</i></b>
31   * </a>
32   *
33   * @author Alexander Chow
34   *
35   */
36  public class EntryDisplayDateComparator extends OrderByComparator {
37  
38      public static String ORDER_BY_ASC = "displayDate ASC, entryId ASC";
39  
40      public static String ORDER_BY_DESC = "displayDate DESC, entryId DESC";
41  
42      public static String[] ORDER_BY_FIELDS = {"displayDate", "entryId"};
43  
44      public EntryDisplayDateComparator() {
45          this(false);
46      }
47  
48      public EntryDisplayDateComparator(boolean asc) {
49          _asc = asc;
50      }
51  
52      public int compare(Object obj1, Object obj2) {
53          BlogsEntry entry1 = (BlogsEntry)obj1;
54          BlogsEntry entry2 = (BlogsEntry)obj2;
55  
56          int value = DateUtil.compareTo(
57              entry1.getDisplayDate(), entry2.getDisplayDate());
58  
59          if (value == 0) {
60              if (entry1.getEntryId() < entry2.getEntryId()) {
61                  value = -1;
62              }
63              else if (entry1.getEntryId() > entry2.getEntryId()) {
64                  value = 1;
65              }
66          }
67  
68          if (_asc) {
69              return value;
70          }
71          else {
72              return -value;
73          }
74      }
75  
76      public String getOrderBy() {
77          if (_asc) {
78              return ORDER_BY_ASC;
79          }
80          else {
81              return ORDER_BY_DESC;
82          }
83      }
84  
85      public String[] getOrderByFields() {
86          return ORDER_BY_FIELDS;
87      }
88  
89      public boolean isAscending() {
90          return _asc;
91      }
92  
93      private boolean _asc;
94  
95  }