001 /* 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, 013 * software distributed under the License is distributed on an 014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 015 * KIND, either express or implied. See the License for the 016 * specific language governing permissions and limitations 017 * under the License. 018 */ 019 020 package org.apache.geronimo.mail.util; 021 022 import java.io.ByteArrayOutputStream; 023 import java.io.IOException; 024 import java.io.OutputStream; 025 026 /** 027 * @version $Rev: 467553 $ $Date: 2006-10-25 06:01:51 +0200 (Mi, 25. Okt 2006) $ 028 */ 029 public class Hex 030 { 031 private static final Encoder encoder = new HexEncoder(); 032 033 /** 034 * encode the input data producing a Hex encoded byte array. 035 * 036 * @return a byte array containing the Hex encoded data. 037 */ 038 public static byte[] encode( 039 byte[] data) 040 { 041 return encode(data, 0, data.length); 042 } 043 044 /** 045 * encode the input data producing a Hex encoded byte array. 046 * 047 * @return a byte array containing the Hex encoded data. 048 */ 049 public static byte[] encode( 050 byte[] data, 051 int off, 052 int length) 053 { 054 ByteArrayOutputStream bOut = new ByteArrayOutputStream(); 055 056 try 057 { 058 encoder.encode(data, off, length, bOut); 059 } 060 catch (IOException e) 061 { 062 throw new RuntimeException("exception encoding Hex string: " + e); 063 } 064 065 return bOut.toByteArray(); 066 } 067 068 /** 069 * Hex encode the byte data writing it to the given output stream. 070 * 071 * @return the number of bytes produced. 072 */ 073 public static int encode( 074 byte[] data, 075 OutputStream out) 076 throws IOException 077 { 078 return encoder.encode(data, 0, data.length, out); 079 } 080 081 /** 082 * Hex encode the byte data writing it to the given output stream. 083 * 084 * @return the number of bytes produced. 085 */ 086 public static int encode( 087 byte[] data, 088 int off, 089 int length, 090 OutputStream out) 091 throws IOException 092 { 093 return encoder.encode(data, 0, data.length, out); 094 } 095 096 /** 097 * decode the Hex encoded input data. It is assumed the input data is valid. 098 * 099 * @return a byte array representing the decoded data. 100 */ 101 public static byte[] decode( 102 byte[] data) 103 { 104 ByteArrayOutputStream bOut = new ByteArrayOutputStream(); 105 106 try 107 { 108 encoder.decode(data, 0, data.length, bOut); 109 } 110 catch (IOException e) 111 { 112 throw new RuntimeException("exception decoding Hex string: " + e); 113 } 114 115 return bOut.toByteArray(); 116 } 117 118 /** 119 * decode the Hex encoded String data - whitespace will be ignored. 120 * 121 * @return a byte array representing the decoded data. 122 */ 123 public static byte[] decode( 124 String data) 125 { 126 ByteArrayOutputStream bOut = new ByteArrayOutputStream(); 127 128 try 129 { 130 encoder.decode(data, bOut); 131 } 132 catch (IOException e) 133 { 134 throw new RuntimeException("exception decoding Hex string: " + e); 135 } 136 137 return bOut.toByteArray(); 138 } 139 140 /** 141 * decode the Hex encoded String data writing it to the given output stream, 142 * whitespace characters will be ignored. 143 * 144 * @return the number of bytes produced. 145 */ 146 public static int decode( 147 String data, 148 OutputStream out) 149 throws IOException 150 { 151 return encoder.decode(data, out); 152 } 153 }