public void SparqlDateTimeEquality(String x, String y, bool equals)
{
IGraph g = new Graph();
INode dateTime1 = g.CreateLiteralNode(x, UriFactory.Create(XmlSpecsHelper.XmlSchemaDataTypeDateTime));
INode dateTime2 = g.CreateLiteralNode(y, UriFactory.Create(XmlSpecsHelper.XmlSchemaDataTypeDateTime));
if (equals)
{
Assert.IsTrue(SparqlSpecsHelper.DateTimeEquality(dateTime1, dateTime2));
Assert.IsTrue(SparqlSpecsHelper.DateTimeEquality(dateTime2, dateTime1));
Assert.IsTrue(SparqlSpecsHelper.Equality(dateTime1, dateTime2));
Assert.IsTrue(SparqlSpecsHelper.Equality(dateTime2, dateTime1));
Assert.IsFalse(SparqlSpecsHelper.Inequality(dateTime1, dateTime2));
Assert.IsFalse(SparqlSpecsHelper.Inequality(dateTime2, dateTime1));
}
else
{
Assert.IsFalse(SparqlSpecsHelper.DateTimeEquality(dateTime1, dateTime2));
Assert.IsFalse(SparqlSpecsHelper.DateTimeEquality(dateTime2, dateTime1));
Assert.IsFalse(SparqlSpecsHelper.Equality(dateTime1, dateTime2));
Assert.IsFalse(SparqlSpecsHelper.Equality(dateTime2, dateTime1));
Assert.IsTrue(SparqlSpecsHelper.Inequality(dateTime1, dateTime2));
Assert.IsTrue(SparqlSpecsHelper.Inequality(dateTime2, dateTime1));
}
}
/// <summary>
/// Evaluates the expression
/// </summary>
/// <param name="context">Evaluation Context</param>
/// <param name="bindingID">Binding ID</param>
/// <returns></returns>
public override IValuedNode Evaluate(SparqlEvaluationContext context, int bindingID)
{
IValuedNode x = this._leftExpr.Evaluate(context, bindingID);
IValuedNode y = this._rightExpr.Evaluate(context, bindingID);
return(new BooleanNode(null, SparqlSpecsHelper.Equality(x, y)));
}
/// <summary>
/// Computes the Effective Boolean Value of this Expression as evaluated for a given Binding
/// </summary>
/// <param name="context">Evaluation Context</param>
/// <param name="bindingID">Binding ID</param>
/// <returns></returns>
public override bool EffectiveBooleanValue(SparqlEvaluationContext context, int bindingID)
{
INode x = this._leftExpr.Value(context, bindingID);
INode y = this._rightExpr.Value(context, bindingID);
return(SparqlSpecsHelper.Equality(x, y));
}
/// <summary>
/// Evaluates the expression.
/// </summary>
/// <param name="context">Evaluation Context.</param>
/// <param name="bindingID">Binding ID.</param>
/// <returns></returns>
public override IValuedNode Evaluate(SparqlEvaluationContext context, int bindingID)
{
INode result = _expr.Evaluate(context, bindingID);
if (result != null)
{
if (_expressions.Count == 0)
{
return(new BooleanNode(null, true));
}
// Have to use SPARQL Value Equality here
// If any expressions error and nothing in the set matches then an error is thrown
bool errors = false;
foreach (ISparqlExpression expr in _expressions)
{
try
{
INode temp = expr.Evaluate(context, bindingID);
if (SparqlSpecsHelper.Equality(result, temp))
{
return(new BooleanNode(null, false));
}
}
catch
{
errors = true;
}
}
if (errors)
{
throw new RdfQueryException("One/more expressions in a Set function failed to evaluate");
}
else
{
return(new BooleanNode(null, true));
}
}
else
{
return(new BooleanNode(null, true));
}
}
