/**
* Finds a partial list (given limit and offset) of registered subjects that
* that represent a dependency on something like a subject in a query list,
* a property, or a printrequest.
*
* `s_id` contains the subject id that links to the query that fulfills one
* of the conditions cited above.
*
* Prefetched Ids are turned into a hash list that can later be split into
* chunks to work either in online or batch mode without creating a huge memory
* foothold.
*
* @note Select a list is crucial for performance as any selectRow would /
* single Id select would strain the system on large list connected to a
* query
*
* @since 2.3
*
* @param array $idlist
* @param RequestOptions $requestOptions
*
* @return array
*/
public function findEmbeddedQueryTargetLinksHashListFor(array $idlist, RequestOptions $requestOptions)
{
if ($idlist === array() || !$this->isEnabled()) {
return array();
}
$options = array('LIMIT' => $requestOptions->getLimit(), 'OFFSET' => $requestOptions->getOffset(), 'GROUP BY' => 's_id', 'ORDER BY' => 's_id', 'DISTINCT' => true);
$conditions = array('o_id' => $idlist);
foreach ($requestOptions->getExtraConditions() as $extraCondition) {
$conditions += $extraCondition;
}
$rows = $this->connection->select(SQLStore::QUERY_LINKS_TABLE, array('s_id'), $conditions, __METHOD__, $options);
$targetLinksIdList = array();
foreach ($rows as $row) {
$targetLinksIdList[] = $row->s_id;
}
if ($targetLinksIdList === array()) {
return array();
}
return $this->store->getObjectIds()->getDataItemPoolHashListFor($targetLinksIdList);
}
public function testOffset()
{
$instance = new RequestOptions();
$instance->setOffset(42);
$this->assertEquals(42, $instance->getOffset());
}
