/**
* Method to serialise an EasyRdf_Graph to RDF/JSON
*
* http://n2.talis.com/wiki/RDF_JSON_Specification
*
* @param object EasyRdf_Graph $graph An EasyRdf_Graph object.
* @param string $format The name of the format to convert to.
* @return string The RDF in the new desired format.
*/
public function serialise($graph, $format)
{
parent::checkSerialiseParams($graph, $format);
if ($format != 'json') {
throw new EasyRdf_Exception("EasyRdf_Serialiser_Json does not support: {$format}");
}
return json_encode(parent::serialise($graph, 'php'));
}
/**
* Serialise an EasyRdf_Graph into 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 $options
* @throws EasyRdf_Exception
* @return string The RDF in the new desired format.
*/
public function serialise($graph, $format, array $options = array())
{
parent::checkSerialiseParams($graph, $format);
if (array_key_exists($format, self::$supportedTypes)) {
$className = self::$supportedTypes[$format];
} else {
throw new EasyRdf_Exception("EasyRdf_Serialiser_Arc does not support: {$format}");
}
$serialiser = ARC2::getSer($className);
if ($serialiser) {
return $serialiser->getSerializedIndex(parent::serialise($graph, 'php'));
} else {
throw new EasyRdf_Exception("ARC2 failed to get a {$className} serialiser.");
}
}