On 20/05/15 13:39, Wojciech Ciesielski wrote:
Hi again :)
String query ="SELECT ?subject ?predicate ?object
from"+ WybierzGrafComboBox.getSelectedItem().toString() +"\n" +
"WHERE {\n" +
" ?subject ?predicate
?object\n" +
"}";
String service = "http://localhost:3030/test/query";;
Query q= QueryFactory.create(query);
try(QueryExecution qexec =
QueryExecutionFactory.sparqlService(service, q))
{
ResultSet rs = qexec.execSelect();
for ( ; rs.hasNext() ; )
{
QuerySolution soln = rs.nextSolution() ;
RDFNode s = soln.get("subject");
RDFNode p = soln.get("predicate");
RDFNode o = soln.get("object");
System.out.println(s +" "+ p+ " "+ o);
}
}
give me good result:
http://www.example.org/exampleDocument#Monica
http://www.example.org/vocabulary#hasSkill
http://www.example.org/vocabulary#Programming
http://www.example.org/exampleDocument#Monica
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.example.org/vocabulary#Person
But i need print it as all other serialization supported in Jena
I think about brutal metod - write all into file give dot on end (to
make it N-Quads), and then use RDFDataMgr :?
I'm sure there are other methods :?
Please pointing me how to do it
One possibility is to use a CONSTRUCT query which produces a model, then
output the model using RDFDataMgr.write(...).
If you want to stick with a SELECT query, then you could do similarly
and create a model in code and write the model.
For RDF/XML you'll need a model; for other formats there are stream
output variations.
Or you could convert to triples (use RDFNode.asNode; Triple.create) and
send the results to a StreamRDF. StreamRDFWriter is one kind of
StreamRDF for outputing in various formats (not RDF/XML).
Andy
