ThreadLastPostDateComparator.java |
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.messageboards.util.comparator; 24 25 import com.liferay.portal.kernel.util.DateUtil; 26 import com.liferay.portal.kernel.util.OrderByComparator; 27 import com.liferay.portlet.messageboards.model.MBThread; 28 29 import java.util.Date; 30 31 /** 32 * <a href="ThreadLastPostDateComparator.java.html"><b><i>View Source</i></b> 33 * </a> 34 * 35 * @author Brian Wing Shun Chan 36 * 37 */ 38 public class ThreadLastPostDateComparator extends OrderByComparator { 39 40 public static String ORDER_BY_ASC = "lastPostDate ASC"; 41 42 public static String ORDER_BY_DESC = "lastPostDate DESC"; 43 44 public ThreadLastPostDateComparator() { 45 this(false); 46 } 47 48 public ThreadLastPostDateComparator(boolean asc) { 49 _asc = asc; 50 } 51 52 public int compare(Object obj1, Object obj2) { 53 MBThread thread1 = (MBThread)obj1; 54 MBThread thread2 = (MBThread)obj2; 55 56 Date lastPostDate1 = thread1.getLastPostDate(); 57 Date lastPostDate2 = thread2.getLastPostDate(); 58 59 if ((lastPostDate1 == null) || (lastPostDate2 == null)) { 60 return 0; 61 } 62 63 int value = DateUtil.compareTo(lastPostDate1, lastPostDate2); 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 private boolean _asc; 83 84 }