| OrderedProperties.java |
1 /**
2 * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3 *
4 * The contents of this file are subject to the terms of the Liferay Enterprise
5 * Subscription License ("License"). You may not use this file except in
6 * compliance with the License. You can obtain a copy of the License by
7 * contacting Liferay, Inc. See the License for the specific language governing
8 * permissions and limitations under the License, including but not limited to
9 * distribution rights of the Software.
10 *
11 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
12 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
13 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
14 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
15 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
17 * SOFTWARE.
18 */
19
20 package com.liferay.portal.kernel.util;
21
22 import java.util.Enumeration;
23 import java.util.Properties;
24 import java.util.Vector;
25
26 /**
27 * <a href="OrderedProperties.java.html"><b><i>View Source</i></b></a>
28 *
29 * @author Brian Wing Shun Chan
30 *
31 */
32 public class OrderedProperties extends Properties {
33
34 public OrderedProperties() {
35 super();
36
37 _names = new Vector<String>();
38 }
39
40 public Enumeration<String> propertyNames() {
41 return _names.elements();
42 }
43
44 public Object put(Object key, Object value) {
45 if (_names.contains(key)) {
46 _names.remove(key);
47 }
48
49 _names.add((String)key);
50
51 return super.put(key, value);
52 }
53
54 public Object remove(Object key) {
55 _names.remove(key);
56
57 return super.remove(key);
58 }
59
60 private Vector<String> _names;
61
62 }