ColumnsComparator.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.portal.tools.comparator; 24 25 import java.util.Comparator; 26 import java.util.List; 27 28 /** 29 * <a href="ColumnsComparator.java.html"><b><i>View Source</i></b></a> 30 * 31 * @author Brian Wing Shun Chan 32 * 33 */ 34 public class ColumnsComparator implements Comparator<Object> { 35 36 public ColumnsComparator(String columnName) { 37 this(new String[] {columnName}); 38 } 39 40 public ColumnsComparator(List<String> columnNames) { 41 this(columnNames.toArray(new String[columnNames.size()])); 42 } 43 44 public ColumnsComparator(String[] columnNames) { 45 _columnNames = columnNames; 46 } 47 48 public int compare(Object obj1, Object obj2) { 49 Object[] column1 = (Object[])obj1; 50 Object[] column2 = (Object[])obj2; 51 52 String columnName1 = (String)column1[0]; 53 String columnName2 = (String)column2[0]; 54 55 int x = -1; 56 57 for (int i = 0; i < _columnNames.length; i++) { 58 if (_columnNames[i].equals(columnName1)) { 59 x = i; 60 61 break; 62 } 63 } 64 65 int y = -1; 66 67 for (int i = 0; i < _columnNames.length; i++) { 68 if (_columnNames[i].equals(columnName2)) { 69 y = i; 70 71 break; 72 } 73 } 74 75 if ((x == -1) && (y > -1)) { 76 return 1; 77 } 78 else if ((x > -1) && (y == -1)) { 79 return -1; 80 } 81 else if ((x > -1) && (y > -1)) { 82 if (x < y) { 83 return -1; 84 } 85 else if (x > y) { 86 return 1; 87 } 88 } 89 90 return 0; 91 } 92 93 private String[] _columnNames; 94 95 }