SPARQL: get all Predicates and their respective Objects and organize them into a List

Question

I am looking for a way to add the results of this query into a 2D String List using Jena framework.

 sparqlQueryString="
    select distinct ?p ?o where 
       {
         <http://dbpedia.org/resource/NVA_(film)> ?p ?o
       }
  ";

in a way where the first row contains the properties and second their respective instances. The problem is that a property may have many instances.

    List<List<String>> results= new ArrayList<List<String>>();
    query = QueryFactory.create(sparqlQueryString);
    qexec = QueryExecutionFactory.sparqlService("http://dbpedia.org/sparql", query);
    s = qexec.execSelect();
    res = ResultSetFactory.copyResults(s);
     while(res.hasNext())
            {
                QuerySolution so = res.nextSolution();
                results.add(so.getResource("p").toString());
                // The part I am looking for to add instance

            }


    // the results expected
    results.get(0) = http://www.w3.org/1999/02/22-rdf-syntax-ns#type
    results.get(0).get(0) =     http://dbpedia.org/class/yago/2005Films
    results.get(0).get(1) =     http://www.w3.org/2002/07/owl#Thing
    results.get(0).get(2) =     http://dbpedia.org/ontology/Work

Answer 1

@AKSW : Server side solution: SPARQL 1.1 feature GROUP_CONCAT (see the W3C recommendation for examples). Client side solution: Java basics.