001/* 002 * (C) Copyright 2006-2007 Nuxeo SA (http://nuxeo.com/) and others. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 * 016 * Contributors: 017 * Nuxeo - initial API and implementation 018 * 019 * $Id$ 020 */ 021 022package org.nuxeo.theme.properties; 023 024import java.util.ArrayList; 025import java.util.Collections; 026import java.util.Enumeration; 027import java.util.List; 028import java.util.Properties; 029 030public class OrderedProperties extends Properties { 031 032 private static final long serialVersionUID = 1L; 033 034 private final List<Object> order; 035 036 public OrderedProperties() { 037 order = new ArrayList<Object>(); 038 } 039 040 @Override 041 public Enumeration<Object> propertyNames() { 042 return Collections.enumeration(order); 043 } 044 045 @Override 046 public Object put(Object key, Object value) { 047 if (order.contains(key)) { 048 order.remove(key); 049 } 050 order.add(key); 051 return super.put(key, value); 052 } 053 054 @Override 055 public Object remove(Object key) { 056 order.remove(key); 057 return super.remove(key); 058 } 059 060}