1   /**
2    * Copyright (c) 2000-2008 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 void list(PrintStream out) {
49          System.out.println("-- listing properties --");
50  
51          Enumeration<String> enu = propertyNames();
52  
53          while (enu.hasMoreElements()) {
54              String name = enu.nextElement();
55  
56              out.println(name + StringPool.EQUAL + getProperty(name));
57          }
58      }
59  
60      public void list(PrintWriter out) {
61          System.out.println("-- listing properties --");
62  
63          Enumeration<String> enu = propertyNames();
64  
65          while (enu.hasMoreElements()) {
66              String name = enu.nextElement();
67  
68              out.println(name + StringPool.EQUAL + getProperty(name));
69          }
70      }
71  
72      public Enumeration<String> propertyNames() {
73          return Collections.enumeration(_names);
74      }
75  
76      public Object put(String key, String value) {
77          if (_names.contains(key)) {
78              _names.remove(key);
79          }
80  
81          _names.add(key);
82  
83          return super.put(key, value);
84      }
85  
86      public Object remove(Object key) {
87          _names.remove(key);
88  
89          return super.remove(key);
90      }
91  
92      private Set<String> _names;
93  
94  }