private function tryFindMatchResultFor($hash, $dataValue)
{
$descriptionFactory = $this->queryFactory->newDescriptionFactory();
$contextPage = $dataValue->getContextPage();
// Exclude the current page from the result match to check whether another
// page matches the condition and if so then the value can no longer be
// assigned and is not unique
$description = $descriptionFactory->newConjunction(array($descriptionFactory->newFromDataValue($dataValue), $descriptionFactory->newValueDescription($contextPage, null, SMW_CMP_NEQ)));
$query = $this->queryFactory->newQuery($description);
$query->setLimit(1);
$dataItems = $this->cachedPropertyValuesPrefetcher->queryPropertyValuesFor($query);
if (!is_array($dataItems) || $dataItems === array()) {
// No other assignments were found therefore it is assumed that at
// the time of the query request, the "contextPage" holds a unique
// value for the property
$page = $contextPage;
} else {
$page = end($dataItems);
}
// Create a linked list so that when the subject is altered or deleted
// the related uniqueness container can be removed as well
$blobStore = $this->cachedPropertyValuesPrefetcher->getBlobStore();
$container = $blobStore->read($this->cachedPropertyValuesPrefetcher->getRootHashFrom($page));
$container->addToLinkedList($hash);
$blobStore->save($container);
return $page;
}
public function testQueryPropertyValuesFor()
{
$expected = array(DIWikiPage::newFromText('Foo'));
$queryResult = $this->getMockBuilder('\\SMWQueryResult')->disableOriginalConstructor()->getMock();
$queryResult->expects($this->atLeastOnce())->method('getResults')->will($this->returnValue($expected));
$this->store->expects($this->any())->method('getQueryResult')->will($this->returnValue($queryResult));
$query = $this->getMockBuilder('\\SMWQuery')->disableOriginalConstructor()->getMock();
$instance = new CachedPropertyValuesPrefetcher($this->store, $this->blobStore);
$this->assertEquals($expected, $instance->queryPropertyValuesFor($query));
}
/**
* @since 2.4
*
* @param string $displayTitle
*
* @return DIProperty|false
*/
public function getPropertyFromDisplayTitle($displayTitle)
{
$descriptionFactory = new DescriptionFactory();
$description = $descriptionFactory->newSomeProperty(new DIProperty('_DTITLE'), $descriptionFactory->newValueDescription(new DIBlob($displayTitle)));
$query = new Query($description);
$query->setLimit(1);
$dataItems = $this->cachedPropertyValuesPrefetcher->queryPropertyValuesFor($query);
if (is_array($dataItems) && $dataItems !== array()) {
$dataItem = end($dataItems);
// Cache results as a linked list attached to
// the property so that it can be purged all together
return new DIProperty($dataItem->getDBKey());
}
return false;
}
