/**
* Extend a given SMWExpData element by adding export data for the
* specified property data itme. This method is called when
* constructing export data structures from SMWSemanticData objects.
*
* @param $property SMWDIProperty
* @param $dataItems array of SMWDataItem objects for the given property
* @param $data SMWExpData to add the data to
*/
public static function addPropertyValues(SMWDIProperty $property, array $dataItems, SMWExpData &$expData)
{
$resourceBuilder = self::$dispatchingResourceBuilder->findResourceBuilder($property);
if ($property->isUserDefined()) {
foreach ($dataItems as $dataItem) {
$resourceBuilder->addResourceValue($expData, $property, $dataItem);
}
} else {
// pre-defined property, only exported if known
$diSubject = $expData->getSubject()->getDataItem();
// subject wikipage required for disambiguating special properties:
if (is_null($diSubject) || $diSubject->getDIType() != SMWDataItem::TYPE_WIKIPAGE) {
return;
}
$pe = self::getSpecialPropertyResource($property->getKey(), $diSubject->getNamespace());
if (is_null($pe)) {
return;
// unknown special property, not exported
}
// have helper property ready before entering the for loop, even if not needed:
$peHelper = self::getResourceElementForProperty($property, true);
$filterNamespace = $property->getKey() == '_REDI' || $property->getKey() == '_URI';
foreach ($dataItems as $dataItem) {
// Basic namespace filtering to ensure that types match for redirects etc.
/// TODO: currently no full check for avoiding OWL DL illegal redirects is done (OWL property type ignored)
if ($filterNamespace && !$dataItem instanceof SMWDIUri && !$dataItem instanceof SMWDIWikiPage) {
continue;
}
$resourceBuilder->addResourceValue($expData, $property, $dataItem);
}
}
}
