OrderedProperties.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.Enumeration; 26 import java.util.Properties; 27 import java.util.Vector; 28 29 /** 30 * <a href="OrderedProperties.java.html"><b><i>View Source</i></b></a> 31 * 32 * @author Brian Wing Shun Chan 33 * 34 */ 35 public class OrderedProperties extends Properties { 36 37 public OrderedProperties() { 38 super(); 39 40 _names = new Vector<String>(); 41 } 42 43 public Enumeration<String> propertyNames() { 44 return _names.elements(); 45 } 46 47 public Object put(Object key, Object value) { 48 if (_names.contains(key)) { 49 _names.remove(key); 50 } 51 52 _names.add((String)key); 53 54 return super.put(key, value); 55 } 56 57 public Object remove(Object key) { 58 _names.remove(key); 59 60 return super.remove(key); 61 } 62 63 private Vector<String> _names; 64 65 }