1 /* 2 * $Id$ 3 * 4 * Copyright (c) 2004, 2009, Oracle and/or its affiliates. All rights reserved. 5 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 6 * 7 * This code is free software; you can redistribute it and/or modify it 8 * under the terms of the GNU General Public License version 2 only, as 9 * published by the Free Software Foundation. Oracle designates this 10 * particular file as subject to the "Classpath" exception as provided 11 * by Oracle in the LICENSE file that accompanied this code. 12 * 13 * This code is distributed in the hope that it will be useful, but WITHOUT 14 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 15 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 16 * version 2 for more details (a copy is included in the LICENSE file that 17 * accompanied this code). 18 * 19 * You should have received a copy of the GNU General Public License version 20 * 2 along with this work; if not, write to the Free Software Foundation, 21 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 22 * 23 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 24 * or visit www.oracle.com if you need additional information or have any 25 * questions. 26 */ 27 package com.sun.javatest.util; 28 29 import java.util.Enumeration; 30 import java.util.Iterator; 31 import java.util.Properties; 32 import java.util.Set; 33 import java.util.TreeSet; 34 35 /** 36 * A subtype of Properties for which the keys method will return a sorted enumeration. 37 * This means that the store method will write the various properties in sorted order. 38 */ 39 public class SortedProperties extends Properties 40 { 41 // override Keys() to return a sorted set 42 public Enumeration<Object> keys() { 43 Set<Object> s = new TreeSet<>(); // ordered 44 for (Enumeration e = super.keys(); e.hasMoreElements(); ) { 45 s.add(e.nextElement()); 46 } 47 48 final Iterator iter = s.iterator(); 49 return new Enumeration<Object>() { 50 public boolean hasMoreElements() { 51 return iter.hasNext(); 52 } 53 public Object nextElement() { 54 return iter.next(); 55 } 56 }; 57 } 58 }