/**
* 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;
}
}
}
$world = librdf_php_get_world();
print "Redland world opened\n";
$storage = librdf_new_storage($world, 'hashes', 'dummy', "new=yes,hash-type='memory'");
print "Redland storage created\n";
$model = librdf_new_model($world, $storage, '');
print "Redland model created\n";
$parser = librdf_new_parser($world, 'rdfxml', 'application/rdf+xml', null);
print "Redland parser created\n";
$uri = librdf_new_uri($world, 'file:../data/dc.rdf');
print "Parsing...\n";
librdf_parser_parse_into_model($parser, $uri, $uri, $model);
print "Done...\n";
librdf_free_uri($uri);
librdf_free_parser($parser);
$query = librdf_new_query($world, 'sparql', null, "PREFIX dc: <http://purl.org/dc/elements/1.1/> SELECT ?a ?c ?d WHERE { ?a dc:title ?c . OPTIONAL { ?a dc:related ?d } }", null);
print "Querying for dc:titles:\n";
$results = librdf_model_query_execute($model, $query);
$count = 1;
while ($results && !librdf_query_results_finished($results)) {
print "result {$count}: {\n";
for ($i = 0; $i < librdf_query_results_get_bindings_count($results); $i++) {
$val = librdf_query_results_get_binding_value($results, $i);
if ($val) {
$nval = librdf_node_to_string($val);
} else {
$nval = '(unbound)';
}
print " " . librdf_query_results_get_binding_name($results, $i) . "=" . $nval . "\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', $baseUri);
}
function append_file($content_type, $file, $base = null)
{
$p = librdf_new_parser($this->_world, $content_type, null, null);
$file_uri = librdf_new_uri($this->_world, $file);
$base_uri = librdf_new_uri($this->_world, is_null($base) ? $this->_base : $base);
$r = librdf_parser_parse_into_model($p, $file_uri, $base_uri, $this->_model);
librdf_free_parser($p);
librdf_free_uri($base_uri);
librdf_free_uri($file_uri);
return $r == 0;
}
/**
* 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 $this->tripleCount;
}
/**
* Free the parser's resources.
*
* @return void
* @access public
*/
public function __destruct()
{
if ($this->parser) {
librdf_free_parser($this->parser);
}
}
