/**
* Parses an RDF collection.
*
* @param TriplePattern $trp
*
* @return Node The first parsed label
*/
protected function parseCollection(&$trp)
{
$tmpLabel = $this->query->getBlanknodeLabel();
$firstLabel = $this->parseNode($tmpLabel);
$this->_fastForward();
$i = 0;
while (current($this->tokens) != ")") {
if ($i > 0) {
$trp[] = new QueryTriple($this->parseNode($tmpLabel), new Resource("http://www.w3.org/1999/02/22-rdf-syntax-ns#rest"), $this->parseNode($tmpLabel = $this->query->getBlanknodeLabel()));
}
$trp[] = new QueryTriple($this->parseNode($tmpLabel), new Resource("http://www.w3.org/1999/02/22-rdf-syntax-ns#first"), $this->parseNode());
$this->_fastForward();
$i++;
}
$trp[] = new QueryTriple($this->parseNode($tmpLabel), new Resource("http://www.w3.org/1999/02/22-rdf-syntax-ns#rest"), new Resource("http://www.w3.org/1999/02/22-rdf-syntax-ns#nil"));
return $firstLabel;
}