static function deleteTriples($iri, $graph, $endpoint)
{
/* Serializer instantiation */
$ser = new FourStore_NTriplesSerializer();
$sp_readonly = @new FourStore_StorePlus($endpoint);
//DELETE OLD TRIPLES WITH THE SUBJECT $uri
$q = "select * where {GRAPH <" . $graph . "> {<" . $iri . "> ?p ?o.}} ";
$oldTriples = @$sp_readonly->query($q, 'rows');
$err = $sp_readonly->getErrors();
if ($err) {
throw new Exception(self::buildMessage($err));
}
if (count($oldTriples) > 0) {
for ($i = 0, $i_max = count($oldTriples); $i < $i_max; $i++) {
$t =& $oldTriples[$i];
$t['s'] = $iri;
$t['s type'] = "uri";
}
/* Serialize a triples array */
$docd = $ser->getSerializedTriples($oldTriples, 1);
$sp = new FourStore_StorePlus($endpoint, false);
$q = "DELETE DATA { \n\t\t\t\t\t\t\tGRAPH <" . $graph . "> { \n\t\t\t\t\t\t\t{$docd} \n\t\t\t \t\t}}";
$res = @$sp->query($q, 'raw');
$err = $sp->getErrors();
if ($err) {
throw new Exception(self::buildMessage($err));
}
if (!$res) {
$msg = "Query delete old triples return: False without errors";
throw new Exception($msg);
}
}
}
static function insertRDF($uri, $graph, $endpoint)
{
self::deleteTriples($uri, $graph, $endpoint);
//READ NEW TRIPLES WITH THE SUBJECT $uri
$parser = ARC2::getRDFXMLParser();
@$parser->parse($uri);
$err = $parser->getErrors();
if ($err) {
throw new Exception(self::buildMessage($err));
}
$newTriples = $parser->getTriples();
for ($i = 0, $i_max = count($newTriples); $i < $i_max; $i++) {
if ($uri != $newTriples[$i]['s']) {
unset($newTriples[$i]);
}
}
/* Serializer instantiation */
$ser = new FourStore_NTriplesSerializer();
/* Serialize a triples array */
$doc = $ser->getSerializedTriples($newTriples, 1);
self::insert($doc, $graph, $endpoint);
}
