コード例 #1
0
  public static String execSparQLQuery(String query) {
    System.out.println("execSPINQuery");
    Model model = getUqModel();

    // Register system functions (such as sp:gt (>))
    SPINModuleRegistry.get().init();

    Query arqQuery = ARQFactory.get().createQuery(model, query);
    ARQ2SPIN arq2SPIN = new ARQ2SPIN(model);
    Select spinQuery = (Select) arq2SPIN.createQuery(arqQuery, null);

    System.out.println("SPIN query in Turtle:");
    model.write(System.out, FileUtils.langTurtle);

    System.out.println("-----");
    String str = spinQuery.toString();
    System.out.println("SPIN query:\n" + str);

    // Now turn it back into a Jena Query
    Query parsedBack = ARQFactory.get().createQuery(spinQuery);
    System.out.println("Jena query:\n" + parsedBack);

    com.hp.hpl.jena.query.Query arq = ARQFactory.get().createQuery(spinQuery);
    QueryExecution qexec = ARQFactory.get().createQueryExecution(arq, model);
    QuerySolutionMap arqBindings = new QuerySolutionMap();
    arqBindings.add("predicate", RDFS.label);
    qexec.setInitialBinding(arqBindings); // Pre-assign the arguments
    ResultSet rs = qexec.execSelect();

    //		System.out.println("#####################################################################");
    //
    //		if (rs.hasNext()) {
    //			QuerySolution row = rs.next();
    //			System.out.println("Row: " +row.toString());
    //			RDFNode user = row.get("User");
    //			Literal label = row.getLiteral("label");
    //			System.out.println(user.toString());
    //		}
    //		RDFNode object = rs.next().get("object");
    //		System.out.println("Label is " + object);

    Collection<User> users = Sparql.exec(getUqModel(), User.class, query);

    String usersString = "";
    for (User user : users) {
      System.out.println("User: "******"<br/>";
    }

    System.out.println("execSPINQuery() done.");
    return usersString;
  }
コード例 #2
0
 // ??
 public static QueryExecution create(Query query, Dataset dataset, QuerySolution initialBinding) {
   checkArg(query);
   QueryExecution qe = make(query, dataset);
   if (initialBinding != null) qe.setInitialBinding(initialBinding);
   return qe;
 }