1 /********************************************************************************
2 * $Id: HexEncodingOutputStream.java 395 2007-09-09 17:40:33Z pgmjsd $
3 * $Author: pgmjsd $
4 * $Date: 2007-09-09 13:40:33 -0400 (Sun, 09 Sep 2007) $
5 *
6 * Copyright 2002-2003 YAJUL Developers, Joshua Davis, Kent Vogel.
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining a copy
9 * of this software and associated documentation files (the "Software"), to deal
10 * in the Software without restriction, including without limitation the rights
11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
12 * copies of the Software, and to permit persons to whom the Software is
13 * furnished to do so, subject to the following conditions:
14 *
15 * The above copyright notice and this permission notice shall be included in
16 * all copies or substantial portions of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
21 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
24 * THE SOFTWARE.
25 *
26 ******************************************************************************/
27 package org.yajul.io;
28
29 import org.yajul.util.StringUtil;
30 import org.yajul.util.Bytes;
31
32 import java.io.FilterOutputStream;
33 import java.io.IOException;
34 import java.io.OutputStream;
35
36 /***
37 * Encodes the input in hexadecimal form.
38 * User: josh
39 * Date: Jan 23, 2004
40 * Time: 9:20:13 AM
41 */
42 public class HexEncodingOutputStream extends FilterOutputStream {
43 /***
44 * Hex chars buffer. *
45 */
46 private char[] hex;
47 /***
48 * Hex byte buffer. *
49 */
50 private byte[] hexBytes;
51 /***
52 * The hexadecimal encoding character set. *
53 */
54 private char[] hexEncodingChars;
55
56 public HexEncodingOutputStream(OutputStream out) {
57 super(out);
58 hexBytes = new byte[2];
59 hex = new char[2];
60 hexEncodingChars = Bytes.HEX_CHARS_LOWER;
61 }
62
63 public void write(int b) throws IOException {
64 writeHex(b);
65 }
66
67 protected void writeHex(int b) throws IOException {
68 StringUtil.hexChars(hexEncodingChars, b, hex);
69 hexBytes[0] = (byte) hex[0];
70 hexBytes[1] = (byte) hex[1];
71 out.write(hexBytes);
72 }
73 }