| SortedProperties.java |
1 /**
2 * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a copy
5 * of this software and associated documentation files (the "Software"), to deal
6 * in the Software without restriction, including without limitation the rights
7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8 * copies of the Software, and to permit persons to whom the Software is
9 * furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20 * SOFTWARE.
21 */
22
23 package com.liferay.portal.kernel.util;
24
25 import java.io.PrintStream;
26 import java.io.PrintWriter;
27
28 import java.util.Collections;
29 import java.util.Enumeration;
30 import java.util.Properties;
31 import java.util.Set;
32 import java.util.TreeSet;
33
34 /**
35 * <a href="SortedProperties.java.html"><b><i>View Source</i></b></a>
36 *
37 * @author Brian Wing Shun Chan
38 *
39 */
40 public class SortedProperties extends Properties {
41
42 public SortedProperties() {
43 super();
44
45 _names = new TreeSet<String>();
46 }
47
48 public SortedProperties(Properties properties) {
49 this();
50
51 Enumeration<String> enu =
52 (Enumeration<String>)properties.propertyNames();
53
54 while (enu.hasMoreElements()) {
55 String key = enu.nextElement();
56
57 String value = properties.getProperty(key);
58
59 setProperty(key, value);
60 }
61 }
62
63 public void clear() {
64 super.clear();
65
66 _names.clear();
67 }
68
69 public void list(PrintStream out) {
70 System.out.println("-- listing properties --");
71
72 Enumeration<String> enu = propertyNames();
73
74 while (enu.hasMoreElements()) {
75 String name = enu.nextElement();
76
77 out.println(name + StringPool.EQUAL + getProperty(name));
78 }
79 }
80
81 public void list(PrintWriter out) {
82 System.out.println("-- listing properties --");
83
84 Enumeration<String> enu = propertyNames();
85
86 while (enu.hasMoreElements()) {
87 String name = enu.nextElement();
88
89 out.println(name + StringPool.EQUAL + getProperty(name));
90 }
91 }
92
93 public Enumeration<String> propertyNames() {
94 return Collections.enumeration(_names);
95 }
96
97 public Object put(String key, String value) {
98 if (_names.contains(key)) {
99 _names.remove(key);
100 }
101
102 _names.add(key);
103
104 return super.put(key, value);
105 }
106
107 public Object remove(Object key) {
108 _names.remove(key);
109
110 return super.remove(key);
111 }
112
113 public Object setProperty(String key, String value) {
114 return put(key, value);
115 }
116
117 private Set<String> _names;
118
119 }