private function getInstanceQueryResult(Query $query, Condition $compoundCondition)
{
if ($this->isSingletonConditionWithElementMatch($compoundCondition)) {
$matchElement = $compoundCondition->matchElement;
if ($compoundCondition->condition === '') {
// all URIs exist, no querying
$results = array(array($matchElement));
} else {
$condition = $this->compoundConditionBuilder->convertConditionToString($compoundCondition);
$namespaces = $compoundCondition->namespaces;
$askQueryResult = $this->connection->ask($condition, $namespaces);
$results = $askQueryResult->isBooleanTrue() ? array(array($matchElement)) : array();
}
$repositoryResult = new RepositoryResult(array(self::RESULT_VARIABLE => 0), $results);
} elseif ($compoundCondition instanceof FalseCondition) {
$repositoryResult = new RepositoryResult(array(self::RESULT_VARIABLE => 0), array());
} else {
$condition = $this->compoundConditionBuilder->convertConditionToString($compoundCondition);
$namespaces = $compoundCondition->namespaces;
$options = $this->getOptions($query, $compoundCondition);
$options['DISTINCT'] = true;
$repositoryResult = $this->connection->select('?' . self::RESULT_VARIABLE, $condition, $options, $namespaces);
}
return $this->queryResultFactory->newQueryResult($repositoryResult, $query);
}
/**
* Get the results for a query in instance retrieval mode.
*
* @param Query $query
*
* @return QueryResult
*/
public function getInstanceQueryResult(Query $query)
{
$this->sortkeys = $query->sortkeys;
$this->compoundConditionBuilder->setSortKeys($this->sortkeys);
$sparqlCondition = $this->compoundConditionBuilder->buildCondition($query->getDescription());
$query->addErrors($this->compoundConditionBuilder->getErrors());
if ($sparqlCondition instanceof SingletonCondition) {
$matchElement = $sparqlCondition->matchElement;
if ($sparqlCondition->condition === '') {
// all URIs exist, no querying
$results = array(array($matchElement));
} else {
$condition = $this->compoundConditionBuilder->convertConditionToString($sparqlCondition);
$namespaces = $sparqlCondition->namespaces;
$askQueryResult = $this->connection->ask($condition, $namespaces);
$results = $askQueryResult->isBooleanTrue() ? array(array($matchElement)) : array();
}
$repositoryResult = new RepositoryResult(array(self::RESULT_VARIABLE => 0), $results);
} elseif ($sparqlCondition instanceof FalseCondition) {
$repositoryResult = new RepositoryResult(array(self::RESULT_VARIABLE => 0), array());
} else {
$condition = $this->compoundConditionBuilder->convertConditionToString($sparqlCondition);
$namespaces = $sparqlCondition->namespaces;
$options = $this->getOptions($query, $sparqlCondition);
$options['DISTINCT'] = true;
$repositoryResult = $this->connection->select('?' . self::RESULT_VARIABLE, $condition, $options, $namespaces);
}
return $this->queryResultFactory->newQueryResult($repositoryResult, $query);
}
private function lookupResourceUriTargetFromDatabase(ExpNsResource $expNsResource)
{
$resourceUri = TurtleSerializer::getTurtleNameForExpElement($expNsResource);
$rediUri = TurtleSerializer::getTurtleNameForExpElement(Exporter::getInstance()->getSpecialPropertyResource('_REDI'));
$skeyUri = TurtleSerializer::getTurtleNameForExpElement(Exporter::getInstance()->getSpecialPropertyResource('_SKEY'));
$respositoryResult = $this->repositoryConnection->select('*', "{$resourceUri} {$skeyUri} ?s OPTIONAL { {$resourceUri} {$rediUri} ?r }", array('LIMIT' => 1), array($expNsResource->getNamespaceId() => $expNsResource->getNamespace()));
return $respositoryResult->current();
}
