public static function create_from_xml($alias, $itnum, $subitnum, $xmlbuffer)
{
$xml = new SimpleXMLElement($xmlbuffer);
$xmlnode = ItemFactory::node($xml, '//xml');
$format = (string) $xmlnode->format;
$extension = Item::extension((string) $xmlnode->find);
#some items have no format
$is_image = array_search($extension, Item::image_extensions());
if ($extension == 'cpd') {
// $format == 'Document' || -- inconsistent
$compound_object = CompoundObject::from_xml($alias, $itnum, $xmlbuffer);
if ($subitnum != NULL) {
return $compound_object->item_by_itnum($subitnum);
} else {
return $compound_object->first_item();
}
} else {
if ($format == 'Image' || $is_image) {
return Image::from_xml($alias, $itnum, $xmlbuffer);
} else {
return Item::from_xml($alias, $itnum, $xmlbuffer);
}
}
}
public function file_type()
{
return Item::extension($this->file);
}
