/**
* Parse a RDF/JSON 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, $baseUri);
if ($format != 'json') {
throw new EasyRdf_Exception("EasyRdf_Parser_Json does not support: {$format}");
}
$rdfphp = json_decode(strval($data), true);
return parent::parse($graph, $rdfphp, 'php', $baseUri);
}
/**
* 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, $baseUri);
if (array_key_exists($format, self::$_supportedTypes)) {
$className = self::$_supportedTypes[$format];
} else {
throw new EasyRdf_Exception("EasyRdf_Parser_Arc does not support: {$format}");
}
$parser = ARC2::getParser($className);
if ($parser) {
$parser->parse($baseUri, $data);
$rdfphp = $parser->getSimpleIndex(false);
return parent::parse($graph, $rdfphp, 'php', $baseUri);
} else {
throw new EasyRdf_Exception("ARC2 failed to get a {$className} parser.");
}
}
/**
* Parse RDF/JSON 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, $baseUri);
if ($format != 'json') {
throw new EasyRdf_Exception("EasyRdf_Parser_Json does not support: {$format}");
}
// Reset the bnode mapping
$this->resetBnodeMap();
$decoded = @json_decode(strval($data), true);
if ($decoded === null) {
throw new EasyRdf_Exception($this->_jsonLastErrorString());
}
if (array_key_exists('triples', $decoded)) {
return $this->_parseJsonTriples($graph, $decoded, $baseUri);
} else {
return parent::parse($graph, $decoded, 'php', $baseUri);
}
}
/**
* Parse RDF/JSON 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, $baseUri);
if ($format != 'json') {
throw new EasyRdf_Exception("EasyRdf_Parser_Json does not support: {$format}");
}
// Reset the bnode mapping
$this->resetBnodeMap();
$decoded = @json_decode(strval($data), true);
if (!$decoded) {
# FIXME: can we get an error message for json_decode?
throw new EasyRdf_Exception("Failed to parse RDF/JSON");
}
if (array_key_exists('triples', $decoded)) {
return $this->_parseJsonTriples($graph, $decoded, $baseUri);
} else {
return parent::parse($graph, $decoded, 'php', $baseUri);
}
}
/**
* 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);
}
/**
* Parse an N-Triples 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, $baseUri);
if ($format != 'ntriples') {
throw new EasyRdf_Exception("EasyRdf_Parser_Ntriples does not support: {$format}");
}
$rdfphp = array();
$lines = preg_split("/[\r\n]+/", strval($data));
foreach ($lines as $line) {
if (preg_match("/(.+)\\s+<([^<>]+)>\\s+(.+)\\s*\\./", $line, $matches)) {
$subject = $this->parseNtriplesSubject($matches[1]);
$predicate = $matches[2];
$object = $this->parseNtriplesObject($matches[3]);
if (!isset($rdfphp[$subject])) {
$rdfphp[$subject] = array();
}
if (!isset($rdfphp[$subject][$predicate])) {
$rdfphp[$subject][$predicate] = array();
}
array_push($rdfphp[$subject][$predicate], $object);
}
}
# FIXME: generate objects directly, instead of this second stage
return parent::parse($graph, $rdfphp, 'php', $baseUri);
}