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65 lines
2.2 KiB
65 lines
2.2 KiB
/* |
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* Licensed to the Apache Software Foundation (ASF) under one |
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* or more contributor license agreements. See the NOTICE file |
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* distributed with this work for additional information |
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* regarding copyright ownership. The ASF licenses this file |
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* to you under the Apache License, Version 2.0 (the |
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* "License"); you may not use this file except in compliance |
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* with the License. You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, |
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* software distributed under the License is distributed on an |
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
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* KIND, either express or implied. See the License for the |
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* specific language governing permissions and limitations |
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* under the License. |
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*/ |
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package org.apache.openjpa.lib.util; |
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/** |
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* Base 16 encoder. |
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* |
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* @author Marc Prud'hommeaux |
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* @nojavadoc |
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*/ |
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public class Base16Encoder { |
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private final static char[] HEX = new char[]{ |
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'0', '1', '2', '3', '4', '5', '6', '7', |
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'8', '9', 'A', 'B', 'C', 'D', 'E', 'F' }; |
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/** |
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* Convert bytes to a base16 string. |
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*/ |
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public static String encode(byte[] byteArray) { |
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StringBuffer hexBuffer = new StringBuffer(byteArray.length * 2); |
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for (int i = 0; i < byteArray.length; i++) |
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for (int j = 1; j >= 0; j--) |
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hexBuffer.append(HEX[(byteArray[i] >> (j * 4)) & 0xF]); |
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return hexBuffer.toString(); |
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} |
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/** |
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* Convert a base16 string into a byte array. |
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*/ |
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public static byte[] decode(String s) { |
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int len = s.length(); |
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byte[] r = new byte[len / 2]; |
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for (int i = 0; i < r.length; i++) { |
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int digit1 = s.charAt(i * 2), digit2 = s.charAt(i * 2 + 1); |
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if (digit1 >= '0' && digit1 <= '9') |
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digit1 -= '0'; |
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else if (digit1 >= 'A' && digit1 <= 'F') |
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digit1 -= 'A' - 10; |
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if (digit2 >= '0' && digit2 <= '9') |
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digit2 -= '0'; |
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else if (digit2 >= 'A' && digit2 <= 'F') |
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digit2 -= 'A' - 10; |
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r[i] = (byte) ((digit1 << 4) + digit2); |
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} |
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return r; |
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} |
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}
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