public void write(@NotNull ByteBuffer buf) {
if (buf == null) {
throw new IllegalArgumentException("buf must be not null");
}
header.write(buf);
for (Command command : commands) {
command.write(buf);
}
}
public static Packet read(@NotNull ByteBuffer buf) throws ParseException {
if (buf == null) {
throw new IllegalArgumentException("buf must be not null");
}
try {
PacketHeader header = PacketHeader.read(buf);
if (buf.remaining() != header.size - PacketHeader.HEADER_LENGTH) {
throw new ParseException(
"Packet header size = %d, but buf remaining = %d", header.size, buf.remaining());
}
if (header.isHello()) {
buf.mark();
int connectionFlag = buf.get() & 0xFF;
buf.position(buf.position() + 2); // skip 2 bytes
int connectionUptime = buf.get() & 0xFF;
buf.reset();
String payload = Utils.readHexString(buf);
return new PacketHello(header, connectionFlag, connectionUptime, payload);
}
ArrayList<Command> commands = new ArrayList<>();
while (buf.hasRemaining()) {
commands.add(Command.read(buf));
}
return new Packet(header, commands);
} catch (ParseException ex) {
throw ex;
} catch (Throwable ex) {
buf.rewind();
throw new ParseException(
"Can't parse packet %s cause ", Utils.readHexString(buf), ex.getMessage());
}
}