@Override
public void transform(Repository repository, URI graph, TransformContext context)
throws TransformException {
String catalogUrl = odsUrl + "id/catalog/" + catalogIdentifier + '/';
context.getCustomData().put("dcatTransformerGraph", catalogUrl);
Collection<String> warnings = context.getWarnings();
URI catalogUri = valueFactory.createURI(catalogUrl);
Value rawGraph = getRawGraph(repository, graph);
if (rawGraph == null) {
warnings.add("no catalog found");
throw new TransformException("no catalog found in raw data");
}
try {
RepositoryConnection connection = repository.getConnection();
try {
connection.add(
valueFactory.createStatement(catalogUri, rawCatalogPredicate, rawGraph), graph);
connection.add(
valueFactory.createStatement(
catalogUri, LODMSPredicates.RDFTYPE, LODMSPredicates.DCAT_CATALOG),
graph);
copyCatalogAttributes(graph, catalogUri, rawGraph, connection);
extractDatasetInfo(graph, catalogUri, rawGraph, connection);
} catch (RepositoryException e) {
warnings.add(e.getMessage());
throw new TransformException(e.getMessage(), e);
} catch (MalformedQueryException e) {
warnings.add(e.getMessage());
throw new TransformException(e.getMessage(), e);
} catch (UpdateExecutionException e) {
warnings.add(e.getMessage());
throw new TransformException(e.getMessage(), e);
} finally {
connection.close();
}
} catch (Exception e) {
throw new TransformException(e.getMessage(), e);
}
}
@Override
public IResultSet<Value, URI, Literal> selectQuery(String query, String graph) {
connect();
final SPARQLParser parser = new SPARQLParser();
CloseableIteration<? extends BindingSet, QueryEvaluationException> sparqlResults = null;
ParsedQuery parsedQuery = null;
try {
parsedQuery = parser.parseQuery(query, null);
} catch (MalformedQueryException e) {
e.printStackTrace();
}
try {
sparqlResults =
connection.evaluate(
parsedQuery.getTupleExpr(), parsedQuery.getDataset(), new EmptyBindingSet(), false);
} catch (SailException e) {
e.printStackTrace();
}
return new SailResultSet(sparqlResults);
}
