public function write($output)
{
$xfer = 0;
$xfer += $output->writeStructBegin('Cassandra_login_args');
if ($this->keyspace !== null) {
$xfer += $output->writeFieldBegin('keyspace', TType::STRING, 1);
$xfer += $output->writeString($this->keyspace);
$xfer += $output->writeFieldEnd();
}
if ($this->auth_request !== null) {
if (!is_object($this->auth_request)) {
throw new TProtocolException('Bad type in structure.', TProtocolException::INVALID_DATA);
}
$xfer += $output->writeFieldBegin('auth_request', TType::STRUCT, 2);
$xfer += $this->auth_request->write($output);
$xfer += $output->writeFieldEnd();
}
$xfer += $output->writeFieldStop();
$xfer += $output->writeStructEnd();
return $xfer;
}