/**
* Main function of SparqlParser. Parses a query string.
*
* @param String $queryString The SPARQL query
* @return Query The query object
* @throws SparqlParserException
*/
public function parse($queryString = false)
{
$this->prepare();
if ($queryString) {
$this->query->setQueryString($queryString);
$uncommentedQuery = $this->uncomment($queryString);
$this->queryString = $uncommentedQuery;
$this->tokens = self::tokenize($uncommentedQuery);
$this->parseQuery();
if (!$this->query->isComplete()) {
throw new SparqlParserException("Query is incomplete.", null, $queryString);
}
} else {
throw new SparqlParserException("Querystring is empty.", null, key($this->tokens));
$this->query->isEmpty = true;
}
return $this->query;
}
