/**
* Register a new custom interaction
*
* @param string $qtiClass
* @param string $phpClass
* @throws common_exception_Error
*/
public function set($qtiClass, $phpClass)
{
if (!class_exists($phpClass)) {
throw new common_exception_Error('Custom interaction class ' . $phpClass . ' not found');
}
if (!is_subclass_of($phpClass, $this->getInteractionClass())) {
throw new common_exception_Error('Class ' . $phpClass . ' not a subclass of ' . $this->getInteractionClass());
}
parent::set($qtiClass, $phpClass);
}
/**
* @param PortableElementObject $object
* @throws PortableElementNotFoundException
* @throws PortableElementVersionIncompatibilityException
* @throws PortableElementInconsistencyModelException
*/
public function delete(PortableElementObject $object)
{
$portableElements = $this->getAllVersions($object->getTypeIdentifier());
if (!isset($portableElements[$object->getVersion()])) {
throw new PortableElementVersionIncompatibilityException($this->getModel()->getId() . ' with identifier ' . $object->getTypeIdentifier() . ' found, ' . 'but version ' . $object->getVersion() . 'does not exist. Deletion impossible.');
}
unset($portableElements[$object->getVersion()]);
if (empty($portableElements)) {
parent::remove($object->getTypeIdentifier());
} else {
parent::set($object->getTypeIdentifier(), $portableElements);
}
}