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comparison graal/com.oracle.max.base/src/com/sun/max/collect/SortedProperties.java @ 3733:e233f5660da4

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Added Java files from Maxine project.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Sat, 17 Dec 2011 19:59:18 +0100
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children bc8527f3071c
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3732:3e2e8b8abdaf 3733:e233f5660da4
1 /*
2 * Copyright (c) 2007, 2011, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23 package com.sun.max.collect;
24
25 import java.io.*;
26 import java.util.*;
27
28 import com.sun.max.*;
29
30 /**
31 * A subclass of {@link Properties} that {@linkplain Collections#sort(java.util.List) sorts} its properties as they
32 * are saved.
33 */
34 public class SortedProperties extends Properties {
35
36 /**
37 * Overridden so that the properties are {@linkplain #store(Writer, String) saved} sorted according their keys.
38 */
39 @Override
40 public synchronized Enumeration<Object> keys() {
41 final Enumeration<Object> keysEnum = super.keys();
42 final Vector<String> keyList = new Vector<String>(size());
43 while (keysEnum.hasMoreElements()) {
44 keyList.add((String) keysEnum.nextElement());
45 }
46 Collections.sort(keyList);
47 final Class<Enumeration<Object>> type = null;
48 return Utils.cast(type, keyList.elements());
49 }
50 }