1 /* NodeReader - Reads and imports preferences nodes from files
2 Copyright (C) 2001 Free Software Foundation, Inc.
4 This file is part of GNU Classpath.
6 GNU Classpath is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU Classpath is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU Classpath; see the file COPYING. If not, write to the
18 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 Linking this library statically or dynamically with other modules is
22 making a combined work based on this library. Thus, the terms and
23 conditions of the GNU General Public License cover the whole
26 As a special exception, the copyright holders of this library give you
27 permission to link this library with independent modules to produce an
28 executable, regardless of the license terms of these independent
29 modules, and to copy and distribute the resulting executable under
30 terms of your choice, provided that you also meet, for each linked
31 independent module, the terms and conditions of the license of that
32 module. An independent module is a module which is not derived from
33 or based on this library. If you modify this library, you may extend
34 this exception to your version of the library, but you are not
35 obligated to do so. If you do not wish to do so, delete this
36 exception statement from your version. */
38 package gnu
.java
.util
.prefs
;
40 import java
.io
.BufferedReader
;
41 import java
.io
.IOException
;
42 import java
.io
.InputStream
;
43 import java
.io
.InputStreamReader
;
44 import java
.io
.Reader
;
45 import java
.util
.prefs
.InvalidPreferencesFormatException
;
46 import java
.util
.prefs
.Preferences
;
47 import java
.util
.prefs
.PreferencesFactory
;
50 * Reads and imports preferences nodes from files.
52 * @author Mark Wielaard (mark@klomp.org)
54 public class NodeReader
{
56 private final BufferedReader br
;
57 private String line
= "";
59 private final PreferencesFactory factory
;
61 public NodeReader(Reader r
, PreferencesFactory factory
) {
62 if(r
instanceof BufferedReader
) {
63 br
= (BufferedReader
) r
;
65 br
= new BufferedReader(r
);
67 this.factory
= factory
;
70 public NodeReader(InputStream is
, PreferencesFactory factory
) {
71 this(new InputStreamReader(is
), factory
);
74 public void importPreferences()
75 throws InvalidPreferencesFormatException
, IOException
80 private void readPreferences()
81 throws InvalidPreferencesFormatException
, IOException
84 skipTill("<preferences");
89 skipTill("</preferences>");
92 private void readRoot()
93 throws InvalidPreferencesFormatException
, IOException
100 String type
= readTill("\"");
102 if ("user".equals(type
)) {
103 root
= factory
.userRoot();
104 } else if ("system".equals(type
)) {
105 root
= factory
.systemRoot();
107 throw new InvalidPreferencesFormatException("Unknown type: "
111 // Read root map and subnodes
119 private void readNodes(Preferences node
)
120 throws InvalidPreferencesFormatException
, IOException
122 while ("node".equals(nextTag())) {
125 String name
= readTill("\"");
126 Preferences subnode
= node
.node(name
);
127 System
.out
.println("Found subnode: " + subnode
.absolutePath());
135 private void readMap(Preferences node
)
136 throws InvalidPreferencesFormatException
, IOException
142 if (line
.startsWith("/>")) {
143 line
= line
.substring(2);
154 private void readEntries(Preferences node
)
155 throws InvalidPreferencesFormatException
, IOException
157 while ("entry".equals(nextTag())) {
160 String key
= readTill("\"");
161 skipTill("value=\"");
162 String value
= readTill("\"");
163 System
.out
.println("Key: " + key
+ " Value: " + value
);
164 node
.put(key
, value
);
168 private void skipTill(String s
)
169 throws InvalidPreferencesFormatException
, IOException
173 throw new InvalidPreferencesFormatException(s
+ " not found");
175 int index
= line
.indexOf(s
);
177 line
= br
.readLine();
179 line
= line
.substring(index
+s
.length());
185 private String
readTill(String s
)
186 throws InvalidPreferencesFormatException
188 int index
= line
.indexOf(s
);
190 throw new InvalidPreferencesFormatException(s
+ " not found");
192 String read
= line
.substring(0, index
);
193 line
= line
.substring(index
+s
.length());
198 private String
nextTag()
199 throws InvalidPreferencesFormatException
, IOException
203 throw new InvalidPreferencesFormatException("unexpected EOF");
205 int start
= line
.indexOf("<");
207 line
= br
.readLine();
211 while (end
!= line
.length()
212 && " \t\r\n".indexOf(line
.charAt(end
)) == -1) {
215 // Line now starts at the found tag
216 String tag
= line
.substring(start
+1,end
);
217 line
= line
.substring(start
);