1 /**
2 * Copyright 2009-2013 The Kuali Foundation
3 *
4 * Licensed under the Educational Community License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.opensource.org/licenses/ecl2.php
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 package org.codehaus.mojo.properties;
17
18 import java.util.Collections;
19 import java.util.Enumeration;
20 import java.util.Properties;
21 import java.util.Vector;
22
23 /**
24 * Override the keys() method so it returns keys in sorted order. One effect of this is the store() method will write properties to the file
25 * system in sorted order.
26 */
27 public class SortedProperties extends Properties {
28
29 /**
30 *
31 */
32 private static final long serialVersionUID = 1330825236411537386L;
33
34 @SuppressWarnings({ "rawtypes", "unchecked" })
35 @Override
36 public synchronized Enumeration<Object> keys() {
37 Enumeration keysEnum = super.keys();
38 Vector keyList = new Vector();
39 while (keysEnum.hasMoreElements()) {
40 keyList.add(keysEnum.nextElement());
41 }
42 Collections.sort(keyList);
43 return keyList.elements();
44 }
45
46 }