/**
* 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 $baseUri the base URI of the data being parsed
*
* @return integer The number of triples added to the graph
*/
public function parse($graph, $data, $format, $baseUri)
{
parent::checkParseParams($graph, $data, $format, $baseUri);
$json = Utils::execCommandPipe($this->rapperCmd, array('--quiet', '--input', $format, '--output', 'json', '--ignore-errors', '--input-uri', $baseUri, '--output-uri', '-', '-'), $data);
// Parse in the JSON
return parent::parse($graph, $json, 'json', $baseUri);
}
/**
* Serialise an EasyRdf\Graph to the RDF format of choice.
*
* @param \EasyRdf\Graph $graph An EasyRdf\Graph object.
* @param string $format The name of the format to convert to.
* @param array $options
*
* @return string The RDF in the new desired format.
* @throws Exception
*/
public function serialise(Graph $graph, $format, array $options = array())
{
parent::checkSerialiseParams($format);
$ntriples = parent::serialise($graph, 'ntriples');
// Hack to produce more concise RDF/XML
if ($format == 'rdfxml') {
$format = 'rdfxml-abbrev';
}
return Utils::execCommandPipe($this->rapperCmd, array('--quiet', '--input', 'ntriples', '--output', $format, '-', 'unknown://'), $ntriples);
}
/**
* Parse HTTP-response object into a meaningful result-object.
*
* Can be overridden to do custom processing
*
* @param Http\Response|\Zend\Http\Response $response
* @return Graph|Result
*/
protected function parseResponseToQuery($response)
{
list($content_type, ) = Utils::parseMimeType($response->getHeader('Content-Type'));
if (strpos($content_type, 'application/sparql-results') === 0) {
$result = new Result($response->getBody(), $content_type);
return $result;
} else {
$result = new Graph($this->queryUri, $response->getBody(), $content_type);
return $result;
}
}
/**
* Internal function to render a graph into an image
*
* @ignore
*/
public function renderImage(Graph $graph, $format = 'png')
{
$dot = $this->serialiseDot($graph);
return Utils::execCommandPipe($this->dotCommand, array("-T{$format}"), $dot);
}