/**
* Create the XAV request
*
* @return string
*/
private function createRequest()
{
$xml = new DOMDocument();
$xml->formatOutput = true;
$avRequest = $xml->appendChild($xml->createElement("AddressValidationRequest"));
$avRequest->setAttribute('xml:lang', 'en-US');
$request = $avRequest->appendChild($xml->createElement("Request"));
$node = $xml->importNode($this->createTransactionNode(), true);
$request->appendChild($node);
$request->appendChild($xml->createElement("RequestAction", "XAV"));
if (null !== $this->requestOption) {
$request->appendChild($xml->createElement("RequestOption", $this->requestOption));
}
if (null !== $this->maxSuggestion) {
$avRequest->appendChild($xml->createElement("MaximumListSize", $this->maxSuggestion));
}
if (null !== $this->address) {
$addressNode = $avRequest->appendChild($xml->createElement("AddressKeyFormat"));
if ($this->address->getAttentionName()) {
$addressNode->appendChild($xml->createElement("ConsigneeName", $this->address->getAttentionName()));
}
if ($this->address->getBuildingName()) {
$addressNode->appendChild($xml->createElement("BuildingName", $this->address->getBuildingName()));
}
if ($this->address->getAddressLine1()) {
$addressNode->appendChild($xml->createElement("AddressLine", $this->address->getAddressLine1()));
}
if ($this->address->getAddressLine2()) {
$addressNode->appendChild($xml->createElement("AddressLine", $this->address->getAddressLine2()));
}
if ($this->address->getAddressLine3()) {
$addressNode->appendChild($xml->createElement("AddressLine", $this->address->getAddressLine3()));
}
if ($this->address->getStateProvinceCode()) {
$addressNode->appendChild($xml->createElement("PoliticalDivision2", $this->address->getStateProvinceCode()));
}
if ($this->address->getCity()) {
$addressNode->appendChild($xml->createElement("PoliticalDivision1", $this->address->getCity()));
}
if ($this->address->getCountryCode()) {
$addressNode->appendChild($xml->createElement("CountryCode", $this->address->getCountryCode()));
}
if ($this->address->getPostalCode()) {
$addressNode->appendChild($xml->createElement("PostcodePrimaryLow", $this->address->getPostalCode()));
}
}
return $xml->saveXML();
}