/**
* Create a marshaller for a given QtiComponent or DOMElement object, depending on the current mapping
* of the MarshallerFactory. If no mapping entry can be found, the factory will perform a ultimate
* trial in the qtism\\data\\storage\\xml\\marshalling namespace to find the relevant Marshaller object.
*
* The newly created marshaller will be set up with the MarshallerFactory itself as its MarshallerFactory
* object (yes, we know, this is highly recursive but necessary x)).
*
* @param \DOMElement|\qtism\data\QtiComponent $object A QtiComponent or DOMElement object you want to get the corresponding Marshaller object.
* @param array $args An optional array of arguments to be passed to the Marshaller constructor.
* @throws \InvalidArgumentException If $object is not a QtiComponent nor a DOMElement object.
* @throws \RuntimeException If no Marshaller object can be created for the given $object.
* @return \qtism\data\storage\xml\marshalling\Marshaller The corresponding Marshaller object.
*/
public function createMarshaller($object, array $args = array())
{
if ($object instanceof QtiComponent) {
$qtiClassName = $object->getQtiClassName();
} elseif ($object instanceof DOMElement) {
$qtiClassName = $object->localName;
}
if (isset($qtiClassName)) {
try {
// Look for a mapping entry.
if ($this->hasMappingEntry($qtiClassName)) {
$class = new ReflectionClass($this->getMappingEntry($qtiClassName));
} else {
// No qtiClassName/mapping entry found.
$msg = "No mapping entry found for QTI class name '{$qtiClassName}'.";
throw new MarshallerNotFoundException($msg, $qtiClassName);
}
} catch (ReflectionException $e) {
$msg = "No marshaller implementation could be found for component '{$qtiClassName}'.";
throw new MarshallerNotFoundException($msg, $qtiClassName, $e);
}
$marshaller = $this->instantiateMarshaller($class, $args);
$marshaller->setMarshallerFactory($this);
return $marshaller;
} else {
$msg = "The object argument must be a QtiComponent or a DOMElementObject, '" . gettype($object) . "' given.";
throw new InvalidArgumentException($msg);
}
}