1 /*
2 * Copyright (c) 2003, Henri Yandell
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or
6 * without modification, are permitted provided that the
7 * following conditions are met:
8 *
9 * + Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
11 *
12 * + Redistributions in binary form must reproduce the above copyright notice,
13 * this list of conditions and the following disclaimer in the documentation
14 * and/or other materials provided with the distribution.
15 *
16 * + Neither the name of Simple-JNDI nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 package org.osjava.sj.loader.util;
34
35 import java.io.IOException;
36 import java.io.InputStream;
37 import java.io.OutputStream;
38
39 import java.util.ArrayList;
40 import java.util.Collections;
41 import java.util.Enumeration;
42 import java.util.LinkedList;
43 import java.util.List;
44 import java.util.Properties;
45 import java.util.Set;
46
47 public abstract class AbstractProperties extends Properties {
48
49 private String delimiter = ".";
50
51 public abstract void load(InputStream in) throws IOException;
52
53 public void setDelimiter(String delimiter) {
54 this.delimiter = delimiter;
55 }
56
57 public String getDelimiter() {
58 return this.delimiter;
59 }
60
61 public synchronized Object put(Object key, Object value) {
62 if(index.contains(key)) {
63 Object obj = get(key);
64 if( !(obj instanceof List)) {
65 List list = new LinkedList();
66 list.add(obj);
67 obj = list;
68 }
69 ((List)obj).add(value);
70 value = obj;
71 }
72 if(!index.contains(key)) {
73 index.add(key);
74 }
75 return super.put(key, value);
76 }
77
78 // our index for the ordering
79 protected ArrayList index = new ArrayList();
80
81 public AbstractProperties() {
82 super();
83 }
84
85 // the props attribute is for defaults. These will need to be
86 // remembered for the save/store method.
87 public AbstractProperties(Properties props) {
88 super(props);
89 }
90
91 public synchronized Object setProperty(String key, String value) {
92 return put(key,value);
93 }
94
95 public synchronized Object remove(Object key) {
96 index.remove(key);
97 return super.remove(key);
98 }
99
100 // simple implementation that depends on keySet.
101 public synchronized Enumeration propertyNames() {
102 return Collections.enumeration( keySet() );
103 }
104 public synchronized Enumeration keys() {
105 return propertyNames();
106 }
107
108 public synchronized Set keySet() {
109 return new OrderedSet(index);
110 }
111
112 // TODO: Handle both save and store.
113 /***
114 * Currently will write out defaults as well, which is not
115 * in the specification.
116 */
117 public void save(OutputStream outstrm, String header) {
118 super.save(outstrm,header);
119 }
120 /***
121 * Currently will write out defaults as well, which is not
122 * in the specification.
123 */
124 public void store(OutputStream outstrm, String header) throws IOException {
125 super.store(outstrm,header);
126 }
127
128 }