public void SparqlGroupByAssignmentSimple2()
{
String query = "SELECT ?x (COUNT(?p) AS ?predicates) WHERE { ?s ?p ?o } GROUP BY ?s AS ?x";
SparqlQueryParser parser = new SparqlQueryParser();
SparqlQuery q = parser.ParseFromString(query);
SparqlFormatter formatter = new SparqlFormatter();
Console.WriteLine(formatter.Format(q));
Console.WriteLine();
QueryableGraph g = new QueryableGraph();
FileLoader.Load(g, "InferenceTest.ttl");
Object results = g.ExecuteQuery(q);
if (results is SparqlResultSet)
{
SparqlResultSet rset = (SparqlResultSet)results;
TestTools.ShowResults(rset);
Assert.IsTrue(rset.All(r => r.HasValue("x") && !r.HasValue("s") && r.HasValue("predicates")), "All Results should have a ?x and ?predicates variables and no ?s variable");
}
else
{
Assert.Fail("Didn't get a Result Set as expected");
}
}
public void SparqlGroupByWithValues2()
{
String query = @"SELECT ?a ?b WHERE { VALUES ( ?a ?b ) { ( 1 2 ) ( 1 UNDEF ) ( UNDEF 2 ) } } GROUP BY ?a ?b";
QueryableGraph g = new QueryableGraph();
SparqlResultSet results = g.ExecuteQuery(query) as SparqlResultSet;
Assert.NotNull(results);
Assert.False(results.IsEmpty);
Assert.Equal(3, results.Count);
}
public void ClassQuery()
{
var graphSource = new GraphSource("http://localhost:7200/repositories/Pets");
var graphProvider = new GraphProvider <SparqlBgpEvaluator>(graphSource);
var classGraph = (new LabelledTreeNode <object, Term>(new Variable())).AddChild(new Rdfs("subClassOf"), new Variable());
var query = new QueryableGraph(graphProvider, new GraphExpression(classGraph));
int count = 0;
foreach (var item in query)
{
count++;
}
Assert.Equal(291, count);
}
public void LeftJoinTest()
{
var graphSource = new GraphSource("http://localhost:7200/repositories/Pets");
var graphProvider = new GraphProvider <SparqlBgpEvaluator>(graphSource);
var propertyGraph = (new LabelledTreeNode <object, Term>(new Variable()))
.AddChild(new Rdf("type"), new Rdf("Property"));
var propertyQuery = new QueryableGraph(graphProvider, new GraphExpression(propertyGraph));
var classGraph = (new LabelledTreeNode <object, Term>(new Variable()))
.AddChild(new Rdfs("subClassOf"), new Variable());
var classQuery = new QueryableGraph(graphProvider, new GraphExpression(classGraph));
var query = propertyQuery.Expand(new Rdfs("range"), classQuery);
int count = 0;
foreach (var item in query)
{
count++;
Debug.WriteLine(item);
}
Assert.Equal(79, count);
}
public void SparqlSimplePropertyPathDuplicates()
{
QueryableGraph g = new QueryableGraph();
FileLoader.Load(g, "property-path-duplicates.ttl");
String foafPrefix = "PREFIX foaf: <http://xmlns.com/foaf/0.1/>\n";
String twoStepQuery = foafPrefix + "SELECT ?x ?y WHERE { ?x foaf:knows ?z . ?z foaf:knows ?y }";
String pathQuery = foafPrefix + "SELECT ?x ?y WHERE {?x foaf:knows{2} ?y}";
Object resultsA = g.ExecuteQuery(twoStepQuery);
Object resultsB = g.ExecuteQuery(pathQuery);
Console.WriteLine("Two Step Query");
Console.WriteLine();
Console.WriteLine(twoStepQuery);
TestTools.ShowResults(resultsA);
Console.WriteLine();
Console.WriteLine("Equivalent Path Query");
Console.WriteLine();
Console.WriteLine(pathQuery);
TestTools.ShowResults(resultsB);
Console.WriteLine();
Assert.AreEqual(resultsA, resultsB, "Result Sets should have been equivalent");
}
public void SparqlGroupByAssignmentExpression3()
{
String query = "SELECT ?lang (SAMPLE(?o) AS ?example) WHERE { ?s ?p ?o . FILTER(ISLITERAL(?o)) } GROUP BY (LANG(?o) AS ?lang) HAVING LANGMATCHES(?lang, \"*\")";
SparqlQueryParser parser = new SparqlQueryParser();
SparqlQuery q = parser.ParseFromString(query);
SparqlFormatter formatter = new SparqlFormatter();
Console.WriteLine(formatter.Format(q));
Console.WriteLine();
QueryableGraph g = new QueryableGraph();
UriLoader.Load(g, new Uri("http://dbpedia.org/resource/Southampton"));
Object results = g.ExecuteQuery(q);
if (results is SparqlResultSet)
{
SparqlResultSet rset = (SparqlResultSet)results;
TestTools.ShowResults(rset);
Assert.IsTrue(rset.All(r => r.HasValue("lang") && r.HasValue("example")), "All Results should have a ?lang and a ?example variable");
}
else
{
Assert.Fail("Didn't get a Result Set as expected");
}
}
