| 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 ThreadLastPostDateComparator() {
42 this(false);
43 }
44
45 public ThreadLastPostDateComparator(boolean asc) {
46 _asc = asc;
47 }
48
49 public int compare(Object obj1, Object obj2) {
50 MBThread thread1 = (MBThread)obj1;
51 MBThread thread2 = (MBThread)obj2;
52
53 Date lastPostDate1 = thread1.getLastPostDate();
54 Date lastPostDate2 = thread2.getLastPostDate();
55
56 if ((lastPostDate1 == null) || (lastPostDate2 == null)) {
57 return 0;
58 }
59
60 int value = DateUtil.compareTo(lastPostDate1, lastPostDate2);
61
62 if (_asc) {
63 return value;
64 }
65 else {
66 return -value;
67 }
68 }
69
70 public String getOrderBy() {
71 if (_asc) {
72 return ORDER_BY_ASC;
73 }
74 else {
75 return ORDER_BY_DESC;
76 }
77 }
78
79 private boolean _asc;
80
81 }