protected function countTriples(NamedNode $graph)
{
$result = $this->fixture->query('SELECT COUNT(?s) as ?count FROM <' . $graph->getUri() . '> WHERE {?s ?p ?o}');
$variables = $result->getVariables();
$variable = array_shift($variables);
$entry = $result->current();
return $entry[$variable]->getValue();
}
/**
* Removes the given graph from the store.
*
* @param NamedNode $graph Instance of NamedNode containing the URI of the graph to drop.
* @param array $options optional It contains key-value pairs and should provide additional
* introductions for the store and/or its adapter(s).
* @throws \Exception If the given graph could not be droped
*/
public function dropGraph(NamedNode $graph, array $options = array())
{
// table names
$g2t = $this->configuration['table-prefix'] . '_g2t';
$id2val = $this->configuration['table-prefix'] . '_id2val';
/*
* ask for all entries with the given graph URI
*/
$query = 'SELECT id FROM ' . $id2val . ' WHERE val = "' . $graph->getUri() . '"';
$result = $this->store->queryDB($query, $this->store->getDBCon());
/*
* go through all given entries and remove all according entries in the g2t table
*/
while ($row = $result->fetch_assoc()) {
$query = 'DELETE FROM ' . $g2t . ' WHERE t="' . $row['id'] . '"';
$this->store->queryDB($query, $this->store->getDBCon());
}
// remove entry/entries in the id2val table too
$query = 'DELETE FROM ' . $id2val . ' WHERE val = "' . $graph->getUri() . '"';
$this->store->queryDB($query, $this->store->getDBCon());
}
/**
* Removes the given graph from the store.
*
* @param NamedNode $graph Instance of NamedNode containing the URI of the graph to drop.
* @param array $options optional It contains key-value pairs and should provide additional
* introductions for the store and/or its adapter(s).
* @throws \Exception If given $graph is not a NamedNode.
* @throws \Exception If the given graph could not be droped
*/
public function dropGraph(NamedNode $graph, array $options = array())
{
if ($graph->isNamed()) {
$this->query('DROP SILENT GRAPH <' . $graph->getUri() . '>');
} else {
throw new \Exception('Given $graph is not a NamedNode.');
}
}
