1 /**
2 *
3 * Copyright 2003-2006 The Apache Software Foundation
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18 package org.apache.geronimo.mail.util;
19
20 import java.io.ByteArrayOutputStream;
21 import java.io.IOException;
22 import java.io.OutputStream;
23
24 public class Hex
25 {
26 private static final Encoder encoder = new HexEncoder();
27
28 /**
29 * encode the input data producing a Hex encoded byte array.
30 *
31 * @return a byte array containing the Hex encoded data.
32 */
33 public static byte[] encode(
34 byte[] data)
35 {
36 return encode(data, 0, data.length);
37 }
38
39 /**
40 * encode the input data producing a Hex encoded byte array.
41 *
42 * @return a byte array containing the Hex encoded data.
43 */
44 public static byte[] encode(
45 byte[] data,
46 int off,
47 int length)
48 {
49 ByteArrayOutputStream bOut = new ByteArrayOutputStream();
50
51 try
52 {
53 encoder.encode(data, off, length, bOut);
54 }
55 catch (IOException e)
56 {
57 throw new RuntimeException("exception encoding Hex string: " + e);
58 }
59
60 return bOut.toByteArray();
61 }
62
63 /**
64 * Hex encode the byte data writing it to the given output stream.
65 *
66 * @return the number of bytes produced.
67 */
68 public static int encode(
69 byte[] data,
70 OutputStream out)
71 throws IOException
72 {
73 return encoder.encode(data, 0, data.length, out);
74 }
75
76 /**
77 * Hex encode the byte data writing it to the given output stream.
78 *
79 * @return the number of bytes produced.
80 */
81 public static int encode(
82 byte[] data,
83 int off,
84 int length,
85 OutputStream out)
86 throws IOException
87 {
88 return encoder.encode(data, 0, data.length, out);
89 }
90
91 /**
92 * decode the Hex encoded input data. It is assumed the input data is valid.
93 *
94 * @return a byte array representing the decoded data.
95 */
96 public static byte[] decode(
97 byte[] data)
98 {
99 ByteArrayOutputStream bOut = new ByteArrayOutputStream();
100
101 try
102 {
103 encoder.decode(data, 0, data.length, bOut);
104 }
105 catch (IOException e)
106 {
107 throw new RuntimeException("exception decoding Hex string: " + e);
108 }
109
110 return bOut.toByteArray();
111 }
112
113 /**
114 * decode the Hex encoded String data - whitespace will be ignored.
115 *
116 * @return a byte array representing the decoded data.
117 */
118 public static byte[] decode(
119 String data)
120 {
121 ByteArrayOutputStream bOut = new ByteArrayOutputStream();
122
123 try
124 {
125 encoder.decode(data, bOut);
126 }
127 catch (IOException e)
128 {
129 throw new RuntimeException("exception decoding Hex string: " + e);
130 }
131
132 return bOut.toByteArray();
133 }
134
135 /**
136 * decode the Hex encoded String data writing it to the given output stream,
137 * whitespace characters will be ignored.
138 *
139 * @return the number of bytes produced.
140 */
141 public static int decode(
142 String data,
143 OutputStream out)
144 throws IOException
145 {
146 return encoder.decode(data, out);
147 }
148 }