StringComparator.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.io.Serializable; 26 27 import java.util.Comparator; 28 29 /** 30 * <a href="StringComparator.java.html"><b><i>View Source</i></b></a> 31 * 32 * @author Brian Wing Shun Chan 33 * 34 */ 35 public class StringComparator implements Comparator<String>, Serializable { 36 37 public StringComparator() { 38 this(true, false); 39 } 40 41 public StringComparator(boolean asc, boolean caseSensitive) { 42 _asc = asc; 43 _caseSensitive = caseSensitive; 44 } 45 46 public int compare(String s1, String s2) { 47 if (s1 == null) { 48 s1 = StringPool.BLANK; 49 } 50 51 if (s2 == null) { 52 s2 = StringPool.BLANK; 53 } 54 55 if (!_asc) { 56 String temp = s1; 57 58 s1 = s2; 59 s2 = temp; 60 } 61 62 if (_caseSensitive) { 63 return s1.compareTo(s2); 64 } 65 else { 66 return s1.compareToIgnoreCase(s2); 67 } 68 } 69 70 private boolean _asc; 71 private boolean _caseSensitive; 72 73 }