/*
* JBoss, Home of Professional Open Source
* Copyright 2011 Red Hat Inc. and/or its affiliates and other contributors
* as indicated by the @authors tag. All rights reserved.
* See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU Lesser General Public License, v. 2.1.
* This program is distributed in the hope that it will be useful, but WITHOUT A
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public License,
* v.2.1 along with this distribution; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
package org.jboss.as.controller;
/**
* Utilities related to deployment content hashes.
*
* @author Brian Stansberry (c) 2011 Red Hat Inc.
*/
public class HashUtil {
private HashUtil() {
}
private static char[] table = {
'0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', 'a', 'b', 'c', 'd', 'e', 'f'
};
/**
* Convert a byte array into a hex string.
*
* @param bytes the bytes
* @return the string
*/
public static String bytesToHexString(final byte[] bytes) {
final StringBuilder builder = new StringBuilder(bytes.length * 2);
for (byte b : bytes) {
builder.append(table[b >> 4 & 0x0f]).append(table[b & 0x0f]);
}
return builder.toString();
}
/**
* Convert a hex string into a byte[].
*
* @param s the string
* @return the bytes
*/
public static byte[] hexStringToByteArray(String s) {
int len = s.length();
byte[] data = new byte[len >> 1];
for (int i = 0, j = 0; j < len; i++) {
int x = Character.digit(s.charAt(j), 16) << 4;
j++;
x = x | Character.digit(s.charAt(j), 16);
j++;
data[i] = (byte) (x & 0xFF);
}
return data;
}
}