| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.openejb.util; |
| |
| public class HexConverter { |
| |
| private HexConverter() { |
| // Disallow instantiation |
| } |
| |
| /** |
| * Converts a byte array to its hexadecimal string representation, ie. |
| * new byte[] { 127, 0, 10 } returns "7F000A". |
| * |
| * @param bytes an array of bytes |
| * @return hexadecimal string representation of the first argument |
| */ |
| public static String bytesToHex(byte[] bytes) { |
| StringBuilder buf = new StringBuilder(bytes.length * 2); |
| for (byte b : bytes) { |
| buf.append(String.format("%02X", b)); |
| } |
| return buf.toString(); |
| } |
| |
| /** |
| * Converts a hexadecimal formatted string into a corresponding byte array. |
| * |
| * @param hexString a hexadecimal representation of a byte array |
| * @return an array of bytes created from the input |
| */ |
| public static byte[] hexToBytes(String hexString) { |
| if (hexString.length() % 2 != 0) { |
| throw new IllegalArgumentException("Invalid number of digits: input must be a string of hexadecimal digit pairs"); |
| } |
| |
| byte[] bytes = new byte[hexString.length() / 2]; |
| for (int i = 0; i < bytes.length; i++) { |
| bytes[i] = (byte) Integer.parseInt(hexString.substring(i * 2, i * 2 + 2), 16); |
| } |
| return bytes; |
| } |
| |
| } |