Metaregistrar\EPP\eppTransferRequest::__construct PHP Method

    function __construct($operation, $object)
    {
        parent::__construct();
        #
        # Sanity checks
        #
        switch ($operation) {
            case self::OPERATION_QUERY:
                if ($object instanceof eppDomain) {
                    if (!strlen($object->getDomainname())) {
                        throw new eppException('Domain object does not contain a valid domain name on eppTransferRequest');
                    }
                    $this->setDomainQuery($object);
                } elseif ($object instanceof eppContactHandle) {
                    $this->setContactQuery($object);
                }
                break;
            case self::OPERATION_REQUEST:
                if ($object instanceof eppDomain) {
                    if (!strlen($object->getDomainname())) {
                        throw new eppException('Domain object does not contain a valid domain name on eppTransferRequest');
                    }
                    $this->setDomainRequest($object);
                } elseif ($object instanceof eppContactHandle) {
                    $this->setContactQuery($object);
                }
                break;
            case self::OPERATION_CANCEL:
                if ($object instanceof eppDomain) {
                    if (!strlen($object->getDomainname())) {
                        throw new eppException('Domain object does not contain a valid domain name on eppTransferRequest');
                    }
                    $this->setDomainCancel($object);
                } elseif ($object instanceof eppContactHandle) {
                    throw new eppException('CANCEL operation not possible on contact transfer query');
                }
                break;
            case self::OPERATION_APPROVE:
                if ($object instanceof eppDomain) {
                    if (!strlen($object->getDomainname())) {
                        throw new eppException('Domain object does not contain a valid domain name on eppTransferRequest');
                    }
                    $this->setDomainApprove($object);
                } elseif ($object instanceof eppContactHandle) {
                    throw new eppException('APPROVE operation not possible on contact transfer query');
                }
                break;
            case self::OPERATION_REJECT:
                if ($object instanceof eppDomain) {
                    if (!strlen($object->getDomainname())) {
                        throw new eppException('Domain object does not contain a valid domain name on eppTransferRequest');
                    }
                    $this->setDomainReject($object);
                } elseif ($object instanceof eppContactHandle) {
                    throw new eppException('REJECT operation not possible on contact transfer query');
                }
                break;
            default:
                throw new eppException('Operation parameter needs to be QUERY, REQUEST, CANCEL, APPROVE or REJECT on eppTransferRequest');
                break;
        }
        $this->addSessionId();
    }