/**
* Sends command message.
*
* <p>
* This method wraps another buffer within command byte and also checks for command success.
* </p>
*
* @version 0.1.2
* @since 0.1.2
* @param OTS_Buffer $message Command to be send.
* @return OTS_Buffer Respond.
* @throws E_OTS_ErrorCode If failure respond received.
* @throws E_OTS_OutOfBuffer When there is read attemp after end of packet stream.
*/
private function sendCommand(OTS_Buffer $message)
{
// prepends command byte
$buffer = new OTS_Buffer();
$buffer->putChar(self::REQUEST_COMMAND);
$buffer->putString($message->getBuffer(), false);
// sends command
$buffer = $this->send($buffer);
$byte = $buffer->getChar();
// checks for error code
if ($byte != self::RESPOND_COMMAND_OK) {
throw new E_OTS_ErrorCode($byte, $buffer->getString());
}
// returns respond with reseted position
$buffer->setPos(0);
return $buffer;
}
