/*
*
*
* Copyright 1990-2009 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version
* 2 only, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License version 2 for more details (a copy is
* included at /legal/license.txt).
*
* You should have received a copy of the GNU General Public License
* version 2 along with this work; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 or visit www.sun.com if you need additional
* information or have any questions.
*/
package com.sun.jsr082.bluetooth;
/*
* Class contains Bluetooth helper methods.
*/
public class BluetoothUtils {
/* Size of byte representation of Bluetooth address. */
public static final int BTADDR_SIZE = 6;
/*
* Converts Bluetooth address from byte array to string representation.
*
* @param btaddr 6-bytes byte array containing Bluetooth address in
* Bluetooth byte order (little-endian)
* @return Bluetooth address as string in
* user-friendly byte order (big-endian) without comma separator
* @throws IllegalArgumentException if input address is invalid
*/
public static String getAddressString(byte[] btaddr)
throws IllegalArgumentException {
final int len = btaddr.length;
if (len != BTADDR_SIZE) {
throw new IllegalArgumentException("Incorrect address size");
}
StringBuffer sb = new StringBuffer(len * 2);
String s;
for (int i = (len - 1); i >= 0; i--) {
// convert decimal to hexadecimal with leading zeroes and uppercase
s = Integer.toHexString((btaddr[i] >> 4) & 0xF);
sb.append(s.toUpperCase());
s = Integer.toHexString(btaddr[i] & 0xF);
sb.append(s.toUpperCase());
}
return sb.toString();
}
/*
* Converts Bluetooth address from string to byte array representation.
*
* @param btaddr Bluetooth address as string in
* user-friendly byte order (big-endian) without comma separator
* @return 6-bytes byte array containing Bluetooth address in
* Bluetooth byte order (little-endian)
* @throws IllegalArgumentException if input address is invalid
*/
public static byte[] getAddressBytes(String btaddr)
throws IllegalArgumentException {
final int len = btaddr.length() / 2;
if (len != BTADDR_SIZE) {
throw new IllegalArgumentException("Incorrect address size");
}
byte[] bytes = new byte[len];
try {
for (int i = 0; i < len; i++) {
String s = btaddr.substring(i * 2, i * 2 + 2);
bytes[len - 1 - i] = (byte)Integer.parseInt(s, 16);
}
} catch (NumberFormatException e) {
throw new IllegalArgumentException("Incorrect address value");
}
return bytes;
}
}