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.journal.util.comparator;
21  
22  import com.liferay.portal.kernel.util.DateUtil;
23  import com.liferay.portal.kernel.util.OrderByComparator;
24  import com.liferay.portlet.journal.model.JournalArticle;
25  
26  /**
27   * <a href="ArticleDisplayDateComparator.java.html"><b><i>View Source</i></b>
28   * </a>
29   *
30   * @author Brian Wing Shun Chan
31   *
32   */
33  public class ArticleDisplayDateComparator extends OrderByComparator {
34  
35      public static String ORDER_BY_ASC = "displayDate ASC, version ASC";
36  
37      public static String ORDER_BY_DESC = "displayDate DESC, version DESC";
38  
39      public ArticleDisplayDateComparator() {
40          this(false);
41      }
42  
43      public ArticleDisplayDateComparator(boolean asc) {
44          _asc = asc;
45      }
46  
47      public int compare(Object obj1, Object obj2) {
48          JournalArticle article1 = (JournalArticle)obj1;
49          JournalArticle article2 = (JournalArticle)obj2;
50  
51          int value = DateUtil.compareTo(
52              article1.getDisplayDate(), article2.getDisplayDate());
53  
54          if (value == 0) {
55              if (article1.getVersion() < article2.getVersion()) {
56                  value = -1;
57              }
58              else if (article1.getVersion() > article2.getVersion()) {
59                  value = 1;
60              }
61          }
62  
63          if (_asc) {
64              return value;
65          }
66          else {
67              return -value;
68          }
69      }
70  
71      public String getOrderBy() {
72          if (_asc) {
73              return ORDER_BY_ASC;
74          }
75          else {
76              return ORDER_BY_DESC;
77          }
78      }
79  
80      private boolean _asc;
81  
82  }