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 static String[] ORDER_BY_FIELDS = {"displayDate", "version"};
40  
41      public ArticleDisplayDateComparator() {
42          this(false);
43      }
44  
45      public ArticleDisplayDateComparator(boolean asc) {
46          _asc = asc;
47      }
48  
49      public int compare(Object obj1, Object obj2) {
50          JournalArticle article1 = (JournalArticle)obj1;
51          JournalArticle article2 = (JournalArticle)obj2;
52  
53          int value = DateUtil.compareTo(
54              article1.getDisplayDate(), article2.getDisplayDate());
55  
56          if (value == 0) {
57              if (article1.getVersion() < article2.getVersion()) {
58                  value = -1;
59              }
60              else if (article1.getVersion() > article2.getVersion()) {
61                  value = 1;
62              }
63          }
64  
65          if (_asc) {
66              return value;
67          }
68          else {
69              return -value;
70          }
71      }
72  
73      public String getOrderBy() {
74          if (_asc) {
75              return ORDER_BY_ASC;
76          }
77          else {
78              return ORDER_BY_DESC;
79          }
80      }
81  
82      public String[] getOrderByFields() {
83          return ORDER_BY_FIELDS;
84      }
85  
86      public boolean isAscending() {
87          return _asc;
88      }
89  
90      private boolean _asc;
91  
92  }