Mercurial > hg > truffle
diff graal/com.oracle.max.base/src/com/sun/max/collect/SortedProperties.java @ 3733:e233f5660da4
Added Java files from Maxine project.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Sat, 17 Dec 2011 19:59:18 +0100 |
parents | |
children | bc8527f3071c |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/graal/com.oracle.max.base/src/com/sun/max/collect/SortedProperties.java Sat Dec 17 19:59:18 2011 +0100 @@ -0,0 +1,50 @@ +/* + * Copyright (c) 2007, 2011, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ +package com.sun.max.collect; + +import java.io.*; +import java.util.*; + +import com.sun.max.*; + +/** + * A subclass of {@link Properties} that {@linkplain Collections#sort(java.util.List) sorts} its properties as they + * are saved. + */ +public class SortedProperties extends Properties { + + /** + * Overridden so that the properties are {@linkplain #store(Writer, String) saved} sorted according their keys. + */ + @Override + public synchronized Enumeration<Object> keys() { + final Enumeration<Object> keysEnum = super.keys(); + final Vector<String> keyList = new Vector<String>(size()); + while (keysEnum.hasMoreElements()) { + keyList.add((String) keysEnum.nextElement()); + } + Collections.sort(keyList); + final Class<Enumeration<Object>> type = null; + return Utils.cast(type, keyList.elements()); + } +}