/**
* Unmarshall a DOMElement object corresponding to a graphicGapMatchInteraction element.
*
* @param \DOMElement $element A DOMElement object.
* @return \qtism\data\QtiComponent A GraphicGapMatchInteraction object.
* @throws \qtism\data\storage\xml\marshalling\UnmarshallingException
*/
protected function unmarshall(DOMElement $element)
{
if (($responseIdentifier = self::getDOMElementAttributeAs($element, 'responseIdentifier')) !== null) {
$objectElts = self::getChildElementsByTagName($element, 'object');
if (count($objectElts) > 0) {
$object = $this->getMarshallerFactory()->createMarshaller($objectElts[0])->unmarshall($objectElts[0]);
$associableHotspotElts = self::getChildElementsByTagName($element, 'associableHotspot');
if (count($associableHotspotElts) > 0) {
$associableHotspots = new AssociableHotspotCollection();
foreach ($associableHotspotElts as $associableHotspotElt) {
$associableHotspots[] = $this->getMarshallerFactory()->createMarshaller($associableHotspotElt)->unmarshall($associableHotspotElt);
}
$gapImgElts = self::getChildElementsByTagName($element, 'gapImg');
if (count($gapImgElts) > 0) {
$gapImgs = new GapImgCollection();
foreach ($gapImgElts as $gapImgElt) {
$gapImgs[] = $this->getMarshallerFactory()->createMarshaller($gapImgElt)->unmarshall($gapImgElt);
}
$component = new GraphicGapMatchInteraction($responseIdentifier, $object, $gapImgs, $associableHotspots);
$promptElts = self::getChildElementsByTagName($element, 'prompt');
if (count($promptElts) > 0) {
$promptElt = $promptElts[0];
$prompt = $this->getMarshallerFactory()->createMarshaller($promptElt)->unmarshall($promptElt);
$component->setPrompt($prompt);
}
if (($xmlBase = self::getXmlBase($element)) !== false) {
$component->setXmlBase($xmlBase);
}
$this->fillBodyElement($component, $element);
return $component;
} else {
$msg = "A 'graphicGapMatchInteraction' element must contain at least one 'gapImg' element, none given.";
throw new UnmarshallingException($msg, $element);
}
} else {
$msg = "A 'graphiGapMatchInteraction' element must contain at least one 'associableHotspot' element, none given.";
throw new UnmarshallingException($msg, $element);
}
} else {
$msg = "A 'graphicGapMatchInteraction' element must contain exactly one 'object' element, none given.";
throw new UnmarshallingException($msg, $element);
}
} else {
$msg = "The mandatory 'responseIdentifier' attribute is missing from the 'graphicGapMatchInteraction' element.";
throw new UnmarshallingException($msg, $element);
}
}
