/src/com/jstun/core/attribute/Username.java

/*

 * This file is part of JSTUN. 

 * 

 * Copyright (c) 2005 Thomas King <king@t-king.de> - All rights

 * reserved.

 * 

 * This software is licensed under either the GNU Public License (GPL),

 * or the Apache 2.0 license. Copies of both license agreements are

 * included in this distribution.

 */



package com.jstun.core.attribute;



import com.jstun.core.util.Utility;

import com.jstun.core.util.UtilityException;



public class Username extends MessageAttribute {

	String username;

	

	public Username() {

		super(MessageAttribute.MessageAttributeType.Username);

	}

	

	public Username(String username) {

		super(MessageAttribute.MessageAttributeType.Username);

		setUsername(username);

	}

	

	public String getUsername() {

		return username;

	}

	

	public void setUsername(String username) {

		this.username = username;

	}

	

	public byte[] getBytes() throws UtilityException {

		int length = username.length();

		// username header

		if ((length % 4) != 0) {

			length += 4 - (length % 4);

		}

		// message attribute header

		length += 4;

		byte[] result = new byte[length];

		// message attribute header

		// type

		System.arraycopy(Utility.integerToTwoBytes(typeToInteger(type)), 0, result, 0, 2);

		// length

		System.arraycopy(Utility.integerToTwoBytes(length-4), 0, result, 2, 2);

		

		// username header

		byte[] temp = username.getBytes();

		System.arraycopy(temp, 0, result, 4, temp.length);

		return result;

	}

	

	public static Username parse(byte[] data) {

		Username result = new Username();

		String username = new String(data);

		result.setUsername(username);

		return result;

	}

}