public void SparqlOptimiserQueryWeightedSimple6()
{
try
{
String query = @"PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
SELECT * WHERE
{
?s rdfs:label 'example' .
?s a rdfs:Class .
?s rdfs:subClassOf rdfs:Class .
}";
Graph weightings = new Graph();
weightings.LoadFromEmbeddedResource("VDS.RDF.Query.SampleWeightings.n3, dotNetRDF.Test");
SparqlOptimiser.QueryOptimiser = new WeightedOptimiser(weightings);
SparqlQuery q = this._parser.ParseFromString(query);
Console.WriteLine(this._formatter.Format(q));
Assert.IsTrue(((NodeMatchPattern)((IMatchTriplePattern)q.RootGraphPattern.TriplePatterns[2]).Object).Node.NodeType == NodeType.Literal, "Third Triple Pattern should have object 'example'");
Assert.IsTrue(((NodeMatchPattern)((IMatchTriplePattern)q.RootGraphPattern.TriplePatterns[1]).Object).Node.NodeType == NodeType.Uri, "Second Triple Pattern should have object rdfs:Class");
Assert.IsTrue(((NodeMatchPattern)((IMatchTriplePattern)q.RootGraphPattern.TriplePatterns[0]).Object).Node.NodeType == NodeType.Uri, "First Triple Pattern should have object rdfs:Class");
}
finally
{
SparqlOptimiser.ResetOptimisers();
}
}
public void SparqlOptimiserQueryWeightedSimple3()
{
try
{
String query = @"PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
SELECT * WHERE
{
?s a ?type .
?s rdfs:label ?label .
}";
Graph weightings = new Graph();
weightings.LoadFromEmbeddedResource("VDS.RDF.Query.SampleWeightings.n3, dotNetRDF.Test");
SparqlOptimiser.QueryOptimiser = new WeightedOptimiser(weightings);
SparqlQuery q = this._parser.ParseFromString(query);
Console.WriteLine(this._formatter.Format(q));
Assert.IsTrue(q.RootGraphPattern.TriplePatterns[0].Variables.Contains("label"), "First Triple Pattern should contain ?label");
Assert.IsTrue(q.RootGraphPattern.TriplePatterns[1].Variables.Contains("type"), "Second Triple Pattern should contain ?type");
}
finally
{
SparqlOptimiser.ResetOptimisers();
}
}
public void SparqlOptimiserQueryWeightedUnknowns2()
{
try
{
String query = @"PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
SELECT * WHERE
{
?s <http://weightings/PredicatesLast> ?o .
<http://weightings/SubjectsFirst> ?p ?o .
?s ?p 'Objects In Middle' .
}";
Graph weightings = new Graph();
weightings.LoadFromEmbeddedResource("VDS.RDF.Query.SampleWeightings.n3, dotNetRDF.Test");
SparqlOptimiser.QueryOptimiser = new WeightedOptimiser(weightings);
SparqlQuery q = this._parser.ParseFromString(query);
Console.WriteLine(this._formatter.Format(q));
Assert.True(q.RootGraphPattern.TriplePatterns[0].Variables.Intersect(new String[] { "p", "o" }).Count() == 2, "First Triple Pattern should contain ?p and ?o");
Assert.True(q.RootGraphPattern.TriplePatterns[1].Variables.Intersect(new String[] { "s", "p" }).Count() == 2, "Second Triple Pattern should contain ?s and ?p");
Assert.True(q.RootGraphPattern.TriplePatterns[2].Variables.Intersect(new String[] { "s", "o" }).Count() == 2, "Second Triple Pattern should contain ?s and ?o");
}
finally
{
SparqlOptimiser.ResetOptimisers();
}
}
public void SparqlOptimiserQueryWeightedSimple()
{
try
{
const string query = @"PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
SELECT * WHERE
{
?s ?p ?o .
?s rdfs:label ?label .
}";
Graph weightings = new Graph();
weightings.LoadFromEmbeddedResource("VDS.RDF.Query.SampleWeightings.n3, dotNetRDF.Test");
SparqlOptimiser.QueryOptimiser = new WeightedOptimiser(weightings);
SparqlQuery q = this._parser.ParseFromString(query);
Console.WriteLine(this._formatter.Format(q));
Assert.False(q.RootGraphPattern.TriplePatterns[0].IsAcceptAll, "First Triple Pattern should not be the ?s ?p ?o Pattern");
Assert.True(q.RootGraphPattern.TriplePatterns[1].IsAcceptAll, "Second Triple Pattern should be the ?s ?p ?o pattern");
}
finally
{
SparqlOptimiser.ResetOptimisers();
}
}
public void SparqlOptimiserQueryWeightedUnknowns()
{
try
{
const string query = @"PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
SELECT * WHERE
{
?s rdfs:comment 'Predicates are weighted less than subjects' .
rdfs:comment rdfs:comment 'Subjects are weighted higher than predicates' .
}";
Graph weightings = new Graph();
weightings.LoadFromEmbeddedResource("VDS.RDF.Query.SampleWeightings.n3, dotNetRDF.Test");
SparqlOptimiser.QueryOptimiser = new WeightedOptimiser(weightings);
SparqlQuery q = this._parser.ParseFromString(query);
Console.WriteLine(this._formatter.Format(q));
Assert.False(q.RootGraphPattern.TriplePatterns[0].Variables.Contains("s"), "First Triple Pattern should not contain ?s");
Assert.True(q.RootGraphPattern.TriplePatterns[1].Variables.Contains("s"), "Second Triple Pattern should contain ?s");
}
finally
{
SparqlOptimiser.ResetOptimisers();
}
}