function toRDF($obj)
{
$data = json_decode($obj, true);
if (!$data) {
echo '{ "status": "failed", "error": "json error" }';
return;
}
$objects = array();
$store = new LibRDF_Storage();
$model = new LibRDF_Model($store);
$document = new LibRDF_URINode($_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI']);
$predicate = new LibRDF_URINode(RDF_BASE_URI . "type");
$object = new LibRDF_URINode(ROAP . "Document");
$statement = new LibRDF_Statement($document, $predicate, $object);
$model->addStatement($statement);
if (is_array($data['data'])) {
$predicate = new LibRDF_URINode(ROAP . "lines");
$lineSeq = new LibRDF_BlankNode();
$statement = new LibRDF_Statement($document, $predicate, $lineSeq);
$model->addStatement($statement);
$predicate = new LibRDF_URINode(RDF_BASE_URI . "type");
$object = new LibRDF_URINode(RDF_BASE_URI . "Seq");
$statement = new LibRDF_Statement($lineSeq, $predicate, $object);
$model->addStatement($statement);
foreach ($data['data'] as $line) {
$predicate = new LibRDF_URINode(RDF_BASE_URI . "li");
$lineObj = new LibRDF_BlankNode();
$objects['line_' . $line['lineId']] = $lineObj;
$statement = new LibRDF_Statement($lineSeq, $predicate, $lineObj);
$model->addStatement($statement);
$predicate = new LibRDF_URINode(RDF_BASE_URI . "type");
$object = new LibRDF_URINode(ROAP . "Line");
$statement = new LibRDF_Statement($lineObj, $predicate, $object);
$model->addStatement($statement);
$predicate = new LibRDF_URINode(ROAP . "words");
$wordSeq = new LibRDF_BlankNode();
$statement = new LibRDF_Statement($lineObj, $predicate, $wordSeq);
$model->addStatement($statement);
$predicate = new LibRDF_URINode(RDF_BASE_URI . "type");
$object = new LibRDF_URINode(RDF_BASE_URI . "Seq");
$statement = new LibRDF_Statement($wordSeq, $predicate, $object);
$model->addStatement($statement);
if (!is_array($line['data'])) {
continue;
}
foreach ($line['data'] as $word) {
$predicate = new LibRDF_URINode(RDF_BASE_URI . "li");
$wordObj = new LibRDF_BlankNode();
$objects['text_' . $line['textId']] = $lineObj;
$statement = new LibRDF_Statement($wordSeq, $predicate, $wordObj);
$model->addStatement($statement);
$predicate = new LibRDF_URINode(RDF_BASE_URI . "type");
$object = new LibRDF_URINode(ROAP . "Word");
$statement = new LibRDF_Statement($wordObj, $predicate, $object);
$model->addStatement($statement);
$predicate = new LibRDF_URINode(ROAP . "value");
$object = new LibRDF_LiteralNode($word['data']);
$statement = new LibRDF_Statement($wordObj, $predicate, $object);
$model->addStatement($statement);
}
}
}
if (is_array($data['retos'])) {
foreach ($data['retos'] as $reto) {
$predicate = new LibRDF_URINode(ROAP . "rethoricalAnnotation");
$retoObj = new LibRDF_BlankNode();
$statement = new LibRDF_Statement($document, $predicate, $retoObj);
$model->addStatement($statement);
$predicate = new LibRDF_URINode(RDF_BASE_URI . "type");
$object = new LibRDF_URINode(ROAP . $reto['type']);
$statement = new LibRDF_Statement($retoObj, $predicate, $object);
$model->addStatement($statement);
// TODO: items
}
}
$serializer = new LibRDF_Serializer('rdfxml-abbrev');
$str = $model->serializeStatements($serializer);
$str = str_replace("\n", '\\n', addslashes($str));
echo '{ "status" : "success", "data": "' . $str . '"}';
}
/**
* Run the query against a model.
*
* @param LibRDF_Model $model The model to query
* @return LibRDF_QueryResults The result of the query
* @throws LibRDF_Error If unable to execute the query
* @access public
*/
public function execute(LibRDF_Model $model)
{
$results = librdf_query_execute($this->query, $model->getModel());
if (!$results) {
throw new LibRDF_Error("Unable to execute query");
}
return LibRDF_QueryResults::makeQueryResults($results);
}
