/**
* Creates a byte array representation of this packets and returns the array
*
* @return
*/
public byte[] serialize() {
Logger.getInstance().println("Packet.serialize(" + this.toString() + ")", Logger.SPAM);
// fetch data
byte[] data = serializeData();
byte[] seqNr = intToByteArray(sequenceNumber);
// create new byte array with proceeding ID, then the senders adress and
// the sequence number
byte[] b = new byte[data.length + 1 + 2 + seqNr.length];
// byte[] b = new byte[1472];
// insert id
b[0] = getId();
// insert sender
b[1] = sender;
// insert receiver
b[2] = receiver;
// insert sequence number
System.arraycopy(seqNr, 0, b, 3, seqNr.length);
// copy data array to new byte array
System.arraycopy(data, 0, b, HEADER_LENGTH, data.length);
Logger.getInstance().println("Packet.serialize returns " + Logger.bytesToHex(b), Logger.SPAM);
return b;
}
/**
* Reads an array of byte which should represent this packet.
*
* @param b
*/
public void unserialize(byte[] b) {
Logger.getInstance().println("Packet.unserialize(" + Logger.bytesToHex(b) + ")", Logger.SPAM);
if (b.length < HEADER_LENGTH) {
// TODO exception
} else if (b[0] != getId()) {
// TODO exception
}
// get sender
byte[] tmp = new byte[4];
sender = b[1];
tmp = new byte[4];
receiver = b[2];
// get sequence number
System.arraycopy(b, 3, tmp, 0, 4);
sequenceNumber = byteArrayToInt(tmp);
// unserialize data using offset to purge the packet's ID
unserializeData(Arrays.copyOfRange(b, HEADER_LENGTH, b.length));
Logger.getInstance().println("Packet.unserialize returns " + this.toString(), Logger.SPAM);
}