public void TestAsk()
{
// Checking the model using ASK queries.
SparqlQuery query = new SparqlQuery("ASK WHERE { ?s nco:fullname 'Hans Wurscht' . }");
ISparqlQueryResult result = Model.ExecuteQuery(query);
Assert.AreEqual(true, result.GetAnwser());
query = new SparqlQuery("ASK WHERE { ?s nco:fullname 'Hans Meier' . }");
result = Model.ExecuteQuery(query);
Assert.AreEqual(false, result.GetAnwser());
}
public void TestInsert()
{
SparqlUpdate update = new SparqlUpdate(@"INSERT DATA INTO <ex:TestModel> { ex:book dc:title 'This is an example title' . }");
_model.ExecuteUpdate(update);
SparqlQuery query = new SparqlQuery(@"ASK WHERE { ?s dc:title 'This is an example title' . }");
ISparqlQueryResult result = _model.ExecuteQuery(query);
Assert.AreEqual(true, result.GetAnwser());
}
public T ExecuteScalar <T>(QueryModel queryModel)
{
Type t = typeof(T);
if (t == typeof(bool))
{
// Generate and execute ASK query.
SparqlQueryModelVisitor <T> visitor = new SparqlQueryModelVisitor <T>(new AskQueryGenerator());
visitor.VisitQueryModel(queryModel);
ISparqlQuery query = visitor.GetQuery();
ISparqlQueryResult result = Model.ExecuteQuery(query, _inferenceEnabled);
return(new object[] { result.GetAnwser() }.OfType <T>().First());
}
else if (queryModel.ResultOperators.Any(o => o is CountResultOperator))
{
SparqlQueryModelVisitor <T> visitor = new SparqlQueryModelVisitor <T>(new SelectBindingsQueryGenerator());
visitor.VisitQueryModel(queryModel);
ISparqlQuery query = visitor.GetQuery();
ISparqlQueryResult result = Model.ExecuteQuery(query, _inferenceEnabled);
BindingSet b = result.GetBindings().FirstOrDefault();
if (b != null && b.Any())
{
return(new object[] { b.First().Value }.OfType <T>().First());
}
else
{
return(new object[] { 0 }.OfType <T>().First());
}
}
else
{
// Unknown scalar type.
throw new NotImplementedException();
}
}
