/* Copyright 2004 Intel Corporation This file is part of Blue Cove. Blue Cove is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. Blue Cove 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with Blue Cove; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */package javax.bluetooth;public class UUID {	public static final UUID RFCOMM_PROTOCOL_UUID = new UUID(0x0003);	public static final UUID L2CAP_PROTOCOL_UUID = new UUID(0x0100);	public static final UUID OBEXFileTransferServiceClass_UUID = new UUID(			0x1106);	byte[] uuidValue;	private void init(String stringValue) throws NumberFormatException {		uuidValue = new byte[16];		for (int i = 0; i < 16; i++)			uuidValue[i] = (byte) Integer.parseInt(stringValue.substring(i * 2,					i * 2 + 2), 16);	}	UUID(byte[] uuidValue) {		this.uuidValue = uuidValue;	}	/*	 * Creates a UUID object from long value uuidValue. A UUID is defined as an	 * unsigned integer whose value can range from [0 to 2128-1]. However, this	 * constructor allows only those values that are in the range of [0 to 232	 * -1]. Negative values and values in the range of [2^32, 2^63-1] are not	 * allowed and will cause an IllegalArgumentException to be thrown.	 * Parameters: uuidValue - the 16-bit or 32-bit value of the UUID Throws:	 * IllegalArgumentException - if uuidValue is not in the range [0, 2^32-1]	 */	public UUID(long longValue) {		this(Long.toHexString(longValue), true);	}	/*	 * Creates a UUID object from the string provided. The characters in the	 * string must be from the hexadecimal set [0-9, a-f, A-F]. It is important	 * to note that the prefix "0x" generally used for hex representation of	 * numbers is not allowed. If the string does not have characters from the	 * hexadecimal set, an exception will be thrown. The string length has to be	 * positive and less than or equal to 32. A string length that exceeds 32 is	 * illegal and will cause an exception. Finally, a null input is also	 * considered illegal and causes an exception. If shortUUID is true,	 * uuidValue represents a 16-bit or 32-bit UUID. If uuidValue is in the	 * range 0x0000 to 0xFFFF then this constructor will create a 16-bit UUID.	 * If uuidValue is in the range 0x000010000 to 0xFFFFFFFF, then this	 * constructor will create a 32-bit UUID. Therefore, uuidValue may only be 8	 * characters long.	 * 	 * On the other hand, if shortUUID is false, then uuidValue represents a	 * 128-bit UUID. Therefore, uuidValue may only be 32 character long	 * 	 * Parameters: uuidValue - the string representation of a 16-bit, 32-bit or	 * 128-bit UUID shortUUID - indicates the size of the UUID to be	 * constructed; true is used to indicate short UUIDs, i.e. either 16-bit or	 * 32-bit; false indicates an 128-bit UUID Throws: NumberFormatException -	 * if uuidValue has characters that are not defined in the hexadecimal set	 * [0-9, a-f, A-F] IllegalArgumentException - if uuidValue length is zero;	 * if shortUUID is true and uuidValue's length is greater than 8; if	 * shortUUID is false and uuidValue's length is greater than 32	 * NullPointerException - if uuidValue is null	 */	public UUID(String stringValue, boolean shortUUID) {		int length = stringValue.length();		if (shortUUID) {			if (length < 1 || length > 8)				throw new IllegalArgumentException();			init("00000000".substring(length) + stringValue					+ "00001000800000805F9B34FB");		} else {			if (length < 1 || length > 32)				throw new IllegalArgumentException();			init("00000000000000000000000000000000".substring(length)					+ stringValue);		}	}	/*	 * Returns the string representation of the 128-bit UUID object. The string	 * being returned represents a UUID that contains characters from the	 * hexadecimal set, [0-9, A-F]. It does not include the prefix "0x" that is	 * generally used for hex representation of numbers. The return value will	 * never be null. Overrides: toString in class java.lang.Object Returns: the	 * string representation of the UUID	 */	public String toString() {		StringBuffer buf = new StringBuffer();		for (int i = 0; i < uuidValue.length; i++) {			buf.append(Integer.toHexString(uuidValue[i] >> 4 & 0xf));			buf.append(Integer.toHexString(uuidValue[i] & 0xf));		}		return buf.toString();	}	/*	 * Determines if two UUIDs are equal. They are equal if their 128 bit values	 * are the same. This method will return false if value is null or is not a	 * UUID object. Overrides: equals in class java.lang.Object Parameters:	 * value - the object to compare to Returns: true if the 128 bit values of	 * the two objects are equal, otherwise false	 */	public boolean equals(Object obj) {		if (obj == null || !(obj instanceof UUID))			return false;		for (int i = 0; i < 16; i++)			if (uuidValue[i] != ((UUID) obj).uuidValue[i])				return false;		return true;	}	/*	 * Computes the hash code for this object. This method retains the same	 * semantic contract as defined in the class java.lang.Object while	 * overriding the implementation. Overrides: hashCode in class	 * java.lang.Object Returns: the hash code for this object	 */	public int hashCode() {		return uuidValue[12] << 24 & 0xff000000 | uuidValue[13] << 16				& 0x00ff0000 | uuidValue[14] << 8 & 0x0000ff00 | uuidValue[15]				& 0x000000ff;	}}