/**
* Parse an RDF document into an EasyRdf_Graph
*
* @param object EasyRdf_Graph $graph the graph to load the data into
* @param string $data the RDF document data
* @param string $format the format of the input data
* @param string $baseUri the base URI of the data being parsed
* @return boolean true if parsing was successful
*/
public function parse($graph, $data, $format, $baseUri)
{
parent::checkParseParams($graph, $data, $format, $baseUri);
$parser = librdf_new_parser($this->_world, $format, null, null);
if (!$parser) {
throw new EasyRdf_Exception("Failed to create librdf_parser of type: {$format}");
}
$rdfUri = librdf_new_uri($this->_world, $baseUri);
if (!$rdfUri) {
throw new EasyRdf_Exception("Failed to create librdf_uri from: {$baseUri}");
}
$stream = librdf_parser_parse_string_as_stream($parser, $data, $rdfUri);
if (!$stream) {
throw new EasyRdf_Exception("Failed to parse RDF stream for: {$rdfUri}");
}
do {
$statement = librdf_stream_get_object($stream);
if ($statement) {
$subject = EasyRdf_Parser_Redland::nodeUriString(librdf_statement_get_subject($statement));
$predicate = EasyRdf_Parser_Redland::nodeUriString(librdf_statement_get_predicate($statement));
$object = EasyRdf_Parser_Redland::nodeToArray(librdf_statement_get_object($statement));
$graph->add($subject, $predicate, $object);
}
} while (!librdf_stream_next($stream));
$errorCount = $this->parserErrorCount($parser);
if ($errorCount) {
throw new EasyRdf_Exception("{$errorCount} errors while parsing.");
}
librdf_free_uri($rdfUri);
librdf_free_stream($stream);
librdf_free_parser($parser);
// Success
return true;
}
$nval = '(unbound)';
}
print " " . librdf_query_results_get_binding_name($results, $i) . "=" . $nval . "\n";
}
print "}\n";
librdf_query_results_next($results);
$count++;
}
if ($results) {
print "Returned {$count} results\n";
}
$results = null;
print "\nExecuting query again\n";
$results = librdf_model_query_execute($model, $query);
if ($results) {
$str = librdf_query_results_to_string($results, null, null);
print "Query results serialized to an XML string size " . strlen($str) . " bytes\n";
} else {
print "Query results couldn't be serialized to an XML string\n";
}
$serializer = librdf_new_serializer($world, 'rdfxml', null, null);
print "Redland serializer created\n";
$base = librdf_new_uri($world, 'http://example.org/base.rdf');
print "Serializing...\n";
librdf_serializer_serialize_model_to_file($serializer, './test-out.rdf', $base, $model);
print "Done...\n";
librdf_free_serializer($serializer);
librdf_free_uri($base);
librdf_free_model($model);
librdf_free_storage($storage);
print "Done\n";
/**
* Parse an RDF document
*
* @param string $uri the base URI of the data
* @param string $data the document data
* @param string $format the format of the input data
* @return array the parsed data
*/
public function parse($uri, $data, $format)
{
if (!is_string($uri) or $uri == null or $uri == '') {
throw new InvalidArgumentException("\$uri should be a string and cannot be null or empty");
}
if (!is_string($data) or $data == null or $data == '') {
throw new InvalidArgumentException("\$data should be a string and cannot be null or empty");
}
if (!is_string($format) or $format == null or $format == '') {
throw new InvalidArgumentException("\$format should be a string and cannot be null or empty");
}
$parser = librdf_new_parser($this->_world, $format, null, null);
if (!$parser) {
throw new EasyRdf_Exception("Failed to create librdf_parser of type: {$format}");
}
$rdfUri = librdf_new_uri($this->_world, $uri);
if (!$rdfUri) {
throw new EasyRdf_Exception("Failed to create librdf_uri from: {$uri}");
}
$stream = librdf_parser_parse_string_as_stream($parser, $data, $rdfUri);
if (!$stream) {
throw new EasyRdf_Exception("Failed to parse RDF stream for: {$rdfUri}");
}
$rdfphp = array();
do {
$statement = librdf_stream_get_object($stream);
if ($statement) {
$subject = EasyRdf_Parser_Redland::nodeUriString(librdf_statement_get_subject($statement));
$predicate = EasyRdf_Parser_Redland::nodeUriString(librdf_statement_get_predicate($statement));
$object = EasyRdf_Parser_Redland::rdfPhpObject(librdf_statement_get_object($statement));
if (!isset($rdfphp[$subject])) {
$rdfphp[$subject] = array();
}
if (!isset($rdfphp[$subject][$predicate])) {
$rdfphp[$subject][$predicate] = array();
}
array_push($rdfphp[$subject][$predicate], $object);
}
} while (!librdf_stream_next($stream));
$errorCount = $this->parserErrorCount($parser);
if ($errorCount) {
throw new EasyRdf_Exception("{$errorCount} errors while parsing.");
}
librdf_free_uri($rdfUri);
librdf_free_stream($stream);
librdf_free_parser($parser);
return $rdfphp;
}
/**
* Parse an RDF document into an EasyRdf_Graph
*
* @param string $graph the graph to load the data into
* @param string $data the RDF document data
* @param string $format the format of the input data
* @param string $baseUri the base URI of the data being parsed
* @return boolean true if parsing was successful
*/
public function parse($graph, $data, $format, $baseUri)
{
parent::checkParseParams($graph, $data, $format, $baseUri);
$parser = librdf_new_parser($this->_world, $format, null, null);
if (!$parser) {
throw new EasyRdf_Exception("Failed to create librdf_parser of type: {$format}");
}
$rdfUri = librdf_new_uri($this->_world, $baseUri);
if (!$rdfUri) {
throw new EasyRdf_Exception("Failed to create librdf_uri from: {$baseUri}");
}
$stream = librdf_parser_parse_string_as_stream($parser, $data, $rdfUri);
if (!$stream) {
throw new EasyRdf_Exception("Failed to parse RDF stream for: {$rdfUri}");
}
$rdfphp = array();
do {
$statement = librdf_stream_get_object($stream);
if ($statement) {
$subject = EasyRdf_Parser_Redland::nodeUriString(librdf_statement_get_subject($statement));
$predicate = EasyRdf_Parser_Redland::nodeUriString(librdf_statement_get_predicate($statement));
$object = EasyRdf_Parser_Redland::rdfPhpObject(librdf_statement_get_object($statement));
if (!isset($rdfphp[$subject])) {
$rdfphp[$subject] = array();
}
if (!isset($rdfphp[$subject][$predicate])) {
$rdfphp[$subject][$predicate] = array();
}
array_push($rdfphp[$subject][$predicate], $object);
}
} while (!librdf_stream_next($stream));
$errorCount = $this->parserErrorCount($parser);
if ($errorCount) {
throw new EasyRdf_Exception("{$errorCount} errors while parsing.");
}
librdf_free_uri($rdfUri);
librdf_free_stream($stream);
librdf_free_parser($parser);
// FIXME: remove this second parse step
return parent::parse($graph, $rdfphp, 'php', $baseUri);
}
function query_to_string($query, $format, $base_uri = null)
{
timings($query);
if (is_null($base_uri)) {
$base_uri = $this->_base_uri;
} elseif (is_string($base_uri)) {
$base_uri = librdf_new_uri($this->_world, $base_uri);
}
$q = librdf_new_query($this->_world, 'sparql', null, $query, $base_uri);
$r = librdf_model_query_execute($this->_model, $q);
if (in_array($format, array('csv', 'tsv'))) {
$format = 'http://www.w3.org/ns/formats/SPARQL_Results_' . strtoupper($format);
} else {
$format = 'http://www.w3.org/2001/sw/DataAccess/json-sparql/';
}
$format_uri = librdf_new_uri($this->_world, $format);
if ($r) {
$r = librdf_query_results_to_string($r, $format_uri, $base_uri);
}
librdf_free_query($q);
librdf_free_uri($format_uri);
timings();
return $r;
}
/**
* Parse an RDF document into an EasyRdf\Graph
*
* @param Graph $graph the graph to load the data into
* @param string $data the RDF document data
* @param string $format the format of the input data
* @param string $baseUri the base URI of the data being parsed
*
* @throws Exception
* @throws \EasyRdf\Exception
* @return integer The number of triples added to the graph
*/
public function parse($graph, $data, $format, $baseUri)
{
parent::checkParseParams($graph, $data, $format, $baseUri);
$parser = librdf_new_parser($this->world, $format, null, null);
if (!$parser) {
throw new \EasyRdf\Exception("Failed to create librdf_parser of type: {$format}");
}
$rdfUri = librdf_new_uri($this->world, $baseUri);
if (!$rdfUri) {
throw new \EasyRdf\Exception("Failed to create librdf_uri from: {$baseUri}");
}
$stream = librdf_parser_parse_string_as_stream($parser, $data, $rdfUri);
if (!$stream) {
throw new Exception("Failed to parse RDF stream");
}
do {
$statement = librdf_stream_get_object($stream);
if ($statement) {
$subject = self::nodeUriString(librdf_statement_get_subject($statement));
$predicate = self::nodeUriString(librdf_statement_get_predicate($statement));
$object = self::nodeToRdfPhp(librdf_statement_get_object($statement));
$this->addTriple($subject, $predicate, $object);
}
} while (!librdf_stream_next($stream));
$errorCount = $this->parserErrorCount($parser);
if ($errorCount) {
throw new Exception("{$errorCount} errors while parsing.");
}
librdf_free_uri($rdfUri);
librdf_free_stream($stream);
librdf_free_parser($parser);
return $this->tripleCount;
}
/**
* Free the URI's resources.
*
* @return void
* @access public
*/
public function __destruct()
{
if ($this->uri) {
librdf_free_uri($this->uri);
}
}
