private function getGraphBuilder($subject, $predicate, $object)
{
if ($subject instanceof GraphBuilder) {
return $subject;
}
$graphBuilder = new GraphBuilder($this->usageValidator);
return $graphBuilder->where($subject, $predicate, $object);
}
/**
* Adds the given triple as a condition.
*
* @param string $subject
* @param string $predicate
* @param string $object
* @return self
* @throws InvalidArgumentException
*/
public function where($subject, $predicate, $object)
{
$this->graphBuilder->where($subject, $predicate, $object);
return $this;
}
public function testGetSPARQL()
{
$graphBuilder = new GraphBuilder(new UsageValidator());
$graphBuilder->where('?a', '?b', '?c');
$graphBuilder->also('?x', '?y');
$graphBuilder->also('?z');
$graphBuilder->where('?a', '?b', '?z');
$this->assertEquals(' ?a ?b ?c , ?z ; ?x ?y , ?z .', $graphBuilder->getSPARQL());
}
