2 * Copyright (c) 2001-2007 Sun Microsystems, Inc. All rights reserved.
4 * The Sun Project JXTA(TM) Software License
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
9 * 1. Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
12 * 2. 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.
16 * 3. The end-user documentation included with the redistribution, if any, must
17 * include the following acknowledgment: "This product includes software
18 * developed by Sun Microsystems, Inc. for JXTA(TM) technology."
19 * Alternately, this acknowledgment may appear in the software itself, if
20 * and wherever such third-party acknowledgments normally appear.
22 * 4. The names "Sun", "Sun Microsystems, Inc.", "JXTA" and "Project JXTA" must
23 * not be used to endorse or promote products derived from this software
24 * without prior written permission. For written permission, please contact
25 * Project JXTA at http://www.jxta.org.
27 * 5. Products derived from this software may not be called "JXTA", nor may
28 * "JXTA" appear in their name, without prior written permission of Sun.
30 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
31 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
32 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SUN
33 * MICROSYSTEMS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
34 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
35 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
36 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
37 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
38 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
39 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
41 * JXTA is a registered trademark of Sun Microsystems, Inc. in the United
42 * States and other countries.
44 * Please see the license information page at :
45 * <http://www.jxta.org/project/www/license.html> for instructions on use of
46 * the license in source files.
48 * ====================================================================
50 * This software consists of voluntary contributions made by many individuals
51 * on behalf of Project JXTA. For more information on Project JXTA, please see
52 * http://www.jxta.org.
54 * This license is based on the BSD license adopted by the Apache Foundation.
57 package sun.net.www.protocol.urn;
61 import java.net.URLConnection;
62 import java.net.URLStreamHandler;
64 import java.io.IOException;
70 * @deprecated Use the URI interfaces for JXTA IDs instead of the URLs.
73 public final class Handler extends URLStreamHandler {
75 public static Handler handler = new Handler();
86 public URLConnection openConnection(URL connect) throws
93 * Private replacement for toHexString since we need the leading 0 digits.
94 * Returns a String containing byte value encoded as 2 hex characters.
96 * @param theByte a byte containing the value to be encoded.
97 * @return String containing byte value encoded as 2 hex characters.
99 private static String toHexDigits(byte theByte) {
100 final char[] HEXDIGITS = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
101 StringBuilder result = new StringBuilder(2);
103 result.append(HEXDIGITS[(theByte >>> 4) & 15]);
104 result.append(HEXDIGITS[theByte & 15]);
106 return result.toString();
111 * 2.4 of RFC2141 says we have to encode these chars.
114 static final String needsEncoding = "%/?#" + "\\\"&<>[]^`{|}~";
118 * The byte values of the chars we have to encode.
121 static final byte[] encodesTo = new byte[] {
122 0x25, 0x2F, 0x3F, 0x23, 0x5c, 0x22, 0x26, 0x3C, 0x3E, 0x5B, 0x5D, 0x5E, 0x60, 0x7B, 0x7C, 0x7D, 0x7E
126 * Encode a string such that it is in a form acceptable for presentation
127 * as a URN. First the string is encoded as UTF8 so that any high byte
128 * unicode chars are ascii representable. Then any special characters in
129 * the string are escaped using the URN % syntax.
131 * @param source the string to encode
132 * @return String containing the URN acceptable presentation form.
134 public static String encodeURN(String source) {
135 String asISO8559_1 = null;
138 // first we get its bytes using UTF to encode its characters.
139 byte[] asBytes = source.getBytes("UTF8");
141 // then read it back in as ISO-8859-1. This allows us to see the
142 // bytes with no translation. This string will have chars in the
144 asISO8559_1 = new String(asBytes, "ISO-8859-1");
145 } catch (java.io.UnsupportedEncodingException never) {
146 // these 2 encodings are required by all java implementations
147 // so this exception will never happen.
151 StringBuilder result = new StringBuilder(asISO8559_1.length());
153 // now do the % encoding for all chars which need it.
154 for (int eachChar = 0; eachChar < asISO8559_1.length(); eachChar++) {
155 char aChar = asISO8559_1.charAt(eachChar);
159 throw new IllegalArgumentException("URN string cannot contain null char");
162 // in the excluded range
163 if ((aChar <= 32) || (aChar >= 127)) {
165 result.append(toHexDigits((byte) aChar));
167 int inSpecials = needsEncoding.indexOf(aChar);
169 // one of the special chars which must be encoded?
170 if (-1 != inSpecials) {
172 result.append(toHexDigits(encodesTo[inSpecials]));
174 result.append(aChar);
175 } // needed no encoding
179 return result.toString();
183 * Converts a string which was previously conveted to URN format back into
184 * the unencoded format.
186 * @param source the string to decode
187 * @return String containing the decoded form of the URN.
189 public static String decodeURN(String source) {
190 StringBuilder result = new StringBuilder(source.length());
192 // remove the % encoding for all chars which needed it.
193 for (int eachChar = 0; eachChar < source.length(); eachChar++) {
194 char aChar = source.charAt(eachChar);
197 result.append(aChar);
199 String twoChars = source.substring(eachChar + 1, eachChar + 3);
201 result.append((char) Integer.parseInt(twoChars, 16));
205 String fromUTF8 = null;
208 // first we get its bytes using ISO-8859-1 to encode its characters.
209 // ISO-8859-1 does no mapping. Each byte is the same as the character.
210 byte[] asBytes = result.toString().getBytes("ISO-8859-1");
212 // then read it back in as UTF8. This gets us any high byte chars back
213 fromUTF8 = new String(asBytes, "UTF8");
214 } catch (java.io.UnsupportedEncodingException never) {
215 // these 2 encodings are required so this exception will never happen