public void SparqlSetDistinct1()
{
INode a = this._factory.CreateBlankNode();
INode b1 = (1).ToLiteral(this._factory);
INode b2 = (2).ToLiteral(this._factory);
Set x = new Set();
x.Add("a", a);
x.Add("_:b", b1);
Set y = new Set();
y.Add("a", a);
y.Add("_:b", b2);
Assert.AreNotEqual(x, y);
Multiset data = new Multiset();
data.Add(x);
data.Add(y);
Assert.AreEqual(2, data.Count);
Table table = new Table(data);
Distinct distinct = new Distinct(table);
//Distinct should yield a single result since temporary variables
//are stripped
SparqlEvaluationContext context = new SparqlEvaluationContext(null, null);
BaseMultiset results = distinct.Evaluate(context);
Assert.AreEqual(1, results.Count);
Assert.IsFalse(results.ContainsVariable("_:b"));
}
public void SparqlSetDistinct2()
{
INode a = this._factory.CreateBlankNode();
INode b1 = (1).ToLiteral(this._factory);
INode b2 = (2).ToLiteral(this._factory);
Set x = new Set();
x.Add("a", a);
x.Add("_:b", b1);
Set y = new Set();
y.Add("a", a);
y.Add("_:b", b2);
Assert.NotEqual(x, y);
Multiset data = new Multiset();
data.Add(x);
data.Add(y);
Assert.Equal(2, data.Count);
Table table = new Table(data);
Distinct distinct = new Distinct(table, true);
//Distinct should yield two result and temporary variables should still
//be present
SparqlEvaluationContext context = new SparqlEvaluationContext(null, null);
BaseMultiset results = distinct.Evaluate(context);
Assert.Equal(2, results.Count);
Assert.True(results.ContainsVariable("_:b"));
}
/// <summary>
/// Processes a Distinct modifier
/// </summary>
/// <param name="distinct">Distinct modifier</param>
/// <param name="context">SPARQL Evaluation Context</param>
public virtual BaseMultiset ProcessDistinct(Distinct distinct, SparqlEvaluationContext context)
{
if (context == null)
{
context = this.GetContext();
}
return(distinct.Evaluate(context));
}