private function buildXml(\DOMNode $parentNode, $data, $xmlRootNodeName = null)
{
$append = true;
if (is_array($data) || $data instanceof \Traversable && !$this->serializer->supportsNormalization($data, $this->format)) {
foreach ($data as $key => $data) {
//Ah this is the magic @ attribute types.
if (0 === strpos($key, '@') && is_scalar($data) && $this->isElementNameValid($attributeName = substr($key, 1))) {
$parentNode->setAttribute($attributeName, $data);
} elseif ($key === '#') {
$append = $this->selectNodeType($parentNode, $data);
} elseif (is_array($data) && false === is_numeric($key)) {
// Is this array fully numeric keys?
if (ctype_digit(implode('', array_keys($data)))) {
/*
* Create nodes to append to $parentNode based on the $key of this array
* Produces <xml><item>0</item><item>1</item></xml>
* From array("item" => array(0,1));.
*/
foreach ($data as $subData) {
$append = $this->appendNode($parentNode, $subData, $key);
}
} else {
$append = $this->appendNode($parentNode, $data, $key);
}
} elseif (is_numeric($key) || !$this->isElementNameValid($key)) {
$append = $this->appendNode($parentNode, $data, 'item', $key);
} elseif (null !== $data || !isset($this->context['remove_empty_tags']) || false === $this->context['remove_empty_tags']) {
$append = $this->appendNode($parentNode, $data, $key);
}
}
return $append;
}
if (is_object($data)) {
$data = $this->serializer->normalize($data, $this->format, $this->context);
if (null !== $data && !is_scalar($data)) {
return $this->buildXml($parentNode, $data, $xmlRootNodeName);
}
// top level data object was normalized into a scalar
if (!$parentNode->parentNode->parentNode) {
$root = $parentNode->parentNode;
$root->removeChild($parentNode);
return $this->appendNode($root, $data, $xmlRootNodeName);
}
return $this->appendNode($parentNode, $data, 'data');
}
throw new UnexpectedValueException(sprintf('An unexpected value could not be serialized: %s', var_export($data, true)));
}