| ThreadLastPostDateComparator.java |
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.messageboards.util.comparator;
21
22 import com.liferay.portal.kernel.util.DateUtil;
23 import com.liferay.portal.kernel.util.OrderByComparator;
24 import com.liferay.portlet.messageboards.model.MBThread;
25
26 import java.util.Date;
27
28 /**
29 * <a href="ThreadLastPostDateComparator.java.html"><b><i>View Source</i></b>
30 * </a>
31 *
32 * @author Brian Wing Shun Chan
33 *
34 */
35 public class ThreadLastPostDateComparator extends OrderByComparator {
36
37 public static String ORDER_BY_ASC = "lastPostDate ASC";
38
39 public static String ORDER_BY_DESC = "lastPostDate DESC";
40
41 public static String[] ORDER_BY_FIELDS = {"lastPostDate"};
42
43 public ThreadLastPostDateComparator() {
44 this(false);
45 }
46
47 public ThreadLastPostDateComparator(boolean asc) {
48 _asc = asc;
49 }
50
51 public int compare(Object obj1, Object obj2) {
52 MBThread thread1 = (MBThread)obj1;
53 MBThread thread2 = (MBThread)obj2;
54
55 Date lastPostDate1 = thread1.getLastPostDate();
56 Date lastPostDate2 = thread2.getLastPostDate();
57
58 if ((lastPostDate1 == null) || (lastPostDate2 == null)) {
59 return 0;
60 }
61
62 int value = DateUtil.compareTo(lastPostDate1, lastPostDate2);
63
64 if (_asc) {
65 return value;
66 }
67 else {
68 return -value;
69 }
70 }
71
72 public String getOrderBy() {
73 if (_asc) {
74 return ORDER_BY_ASC;
75 }
76 else {
77 return ORDER_BY_DESC;
78 }
79 }
80
81 public String[] getOrderByFields() {
82 return ORDER_BY_FIELDS;
83 }
84
85 public boolean isAscending() {
86 return _asc;
87 }
88
89 private boolean _asc;
90
91 }