ObjectValuePairComparator.java |
1 /** 2 * Copyright (c) 2000-2008 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.portal.kernel.util; 24 25 import java.util.Comparator; 26 27 /** 28 * <a href="ObjectValuePairComparator.java.html"><b><i>View Source</i></b></a> 29 * 30 * @author Brian Wing Shun Chan 31 * 32 */ 33 public class ObjectValuePairComparator<K, V> 34 implements Comparator<ObjectValuePair<K, V>> { 35 36 public ObjectValuePairComparator() { 37 this(true); 38 } 39 40 public ObjectValuePairComparator(boolean asc) { 41 this(true, asc); 42 } 43 44 public ObjectValuePairComparator(boolean byKey, boolean asc) { 45 _byKey = byKey; 46 _asc = asc; 47 } 48 49 public int compare(ObjectValuePair<K, V> ovp1, ObjectValuePair<K, V> ovp2) { 50 if (_byKey) { 51 Comparable key1 = (Comparable)ovp1.getKey(); 52 Comparable key2 = (Comparable)ovp2.getKey(); 53 54 if (_asc) { 55 return key1.compareTo(key2); 56 } 57 else { 58 return -(key1.compareTo(key2)); 59 } 60 } 61 else { 62 Comparable value1 = (Comparable)ovp1.getValue(); 63 Comparable value2 = (Comparable)ovp2.getValue(); 64 65 if (_asc) { 66 return value1.compareTo(value2); 67 } 68 else { 69 return -(value1.compareTo(value2)); 70 } 71 } 72 } 73 74 private boolean _byKey; 75 private boolean _asc; 76 77 }