001 /**
002 *
003 * Copyright 2003-2006 The Apache Software Foundation
004 *
005 * Licensed under the Apache License, Version 2.0 (the "License");
006 * you may not use this file except in compliance with the License.
007 * You may obtain a copy of the License at
008 *
009 * http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017
018 package org.apache.geronimo.mail.util;
019
020 import java.io.ByteArrayOutputStream;
021 import java.io.IOException;
022 import java.io.OutputStream;
023
024 public class Hex
025 {
026 private static final Encoder encoder = new HexEncoder();
027
028 /**
029 * encode the input data producing a Hex encoded byte array.
030 *
031 * @return a byte array containing the Hex encoded data.
032 */
033 public static byte[] encode(
034 byte[] data)
035 {
036 return encode(data, 0, data.length);
037 }
038
039 /**
040 * encode the input data producing a Hex encoded byte array.
041 *
042 * @return a byte array containing the Hex encoded data.
043 */
044 public static byte[] encode(
045 byte[] data,
046 int off,
047 int length)
048 {
049 ByteArrayOutputStream bOut = new ByteArrayOutputStream();
050
051 try
052 {
053 encoder.encode(data, off, length, bOut);
054 }
055 catch (IOException e)
056 {
057 throw new RuntimeException("exception encoding Hex string: " + e);
058 }
059
060 return bOut.toByteArray();
061 }
062
063 /**
064 * Hex encode the byte data writing it to the given output stream.
065 *
066 * @return the number of bytes produced.
067 */
068 public static int encode(
069 byte[] data,
070 OutputStream out)
071 throws IOException
072 {
073 return encoder.encode(data, 0, data.length, out);
074 }
075
076 /**
077 * Hex encode the byte data writing it to the given output stream.
078 *
079 * @return the number of bytes produced.
080 */
081 public static int encode(
082 byte[] data,
083 int off,
084 int length,
085 OutputStream out)
086 throws IOException
087 {
088 return encoder.encode(data, 0, data.length, out);
089 }
090
091 /**
092 * decode the Hex encoded input data. It is assumed the input data is valid.
093 *
094 * @return a byte array representing the decoded data.
095 */
096 public static byte[] decode(
097 byte[] data)
098 {
099 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 }