/**
* Unmarshall a DOMElement object corresponding to an XHTML param element.
*
* @param \DOMElement $element A DOMElement object.
* @return \qtism\data\QtiComponent A Param object.
* @throws \qtism\data\storage\xml\marshalling\UnmarshallingException
*/
protected function unmarshall(DOMElement $element)
{
if (($name = self::getDOMElementAttributeAs($element, 'name')) === null) {
// XSD use="required" but can be empty.
$name = '';
}
if (($value = self::getDOMElementAttributeAs($element, 'value')) === null) {
// XSD use="required" but can be empty.
$value = '';
}
if (($valueType = self::getDOMElementAttributeAs($element, 'valuetype')) !== null) {
$component = new Param($name, $value, ParamType::getConstantByName($valueType));
if (($type = self::getDOMElementAttributeAs($element, 'type')) !== null) {
$component->setType($type);
}
return $component;
} else {
$msg = "The mandatory attribute 'valueType' is missing from the 'param' element.";
throw new UnmarshallingException($msg, $element);
}
}
