ARC2::getRDFParser PHP Method

    static function getRDFParser($a = '')
    {
        return ARC2::getParser('RDF', $a);
    }

 public function __construct($a = '')
 {
     parent::__construct();
     $this->a = $a;
     /* parse the before and after graphs if necessary*/
     foreach (array('before', 'after', 'before_rdfxml', 'after_rdfxml') as $rdf) {
         if (!empty($a[$rdf])) {
             if (is_string($a[$rdf])) {
                 /** @var \ARC2_RDFParser $parser */
                 $parser = \ARC2::getRDFParser();
                 $parser->parse(false, $a[$rdf]);
                 $a[$rdf] = $parser->getSimpleIndex(0);
             } else {
                 if (is_array($a[$rdf]) and isset($a[$rdf][0]) and isset($a[$rdf][0]['s'])) {
                     //triples array
                     /** @var \ARC2_RDFSerializer $ser */
                     $ser = \ARC2::getTurtleSerializer();
                     /** @var string $turtle */
                     $turtle = $ser->getSerializedTriples($a[$rdf]);
                     /** @var \ARC2_RDFParser $parser */
                     $parser = \ARC2::getTurtleParser();
                     $parser->parse(false, $turtle);
                     $a[$rdf] = $parser->getSimpleIndex(0);
                 }
             }
             $nrdf = str_replace('_rdfxml', '', $rdf);
             $this->{$nrdf} = $a[$rdf];
         }
     }
     $this->__init();
 }