/// <summary>
/// Gets 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 virtual bool EffectiveBooleanValue(SparqlEvaluationContext context, int bindingID)
{
try
{
switch (this.NumericType(context, bindingID))
{
case SparqlNumericType.Double:
double dblvalue = this.DoubleValue(context, bindingID);
return(!(dblvalue == 0.0d));
case SparqlNumericType.Float:
float fvalue = this.FloatValue(context, bindingID);
return(!(fvalue == 0.0f));
case SparqlNumericType.Decimal:
decimal decvalue = this.DecimalValue(context, bindingID);
return(!(decvalue == 0));
case SparqlNumericType.Integer:
long intvalue = this.IntegerValue(context, bindingID);
return(!(intvalue == 0));
default:
return(false);
}
}
catch (RdfQueryException)
{
//return false;
return(SparqlSpecsHelper.EffectiveBooleanValue(this.Value(context, bindingID)));
}
}
/// <summary>
/// Creates a new Node Expression
/// </summary>
/// <param name="n">Node</param>
public NodeExpressionTerm(INode n)
{
this._node = n;
//Compute the EBV
try
{
this._ebv = SparqlSpecsHelper.EffectiveBooleanValue(this._node);
}
catch
{
this._ebv = false;
}
}
/// <summary>
/// Gets the boolean value.
/// </summary>
/// <returns></returns>
public bool AsBoolean()
{
switch (_numType)
{
case SparqlNumericType.Integer:
return(AsInteger() != 0);
case SparqlNumericType.Decimal:
return(AsDecimal() != Decimal.Zero);
case SparqlNumericType.Float:
return(AsFloat() != 0.0f && !float.IsNaN(AsFloat()));
case SparqlNumericType.Double:
return(AsDouble() != 0.0d && !double.IsNaN(AsDouble()));
default:
return(SparqlSpecsHelper.EffectiveBooleanValue(this));
}
}
/// <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 bool EffectiveBooleanValue(SparqlEvaluationContext context, int bindingID)
{
INode value = this.Value(context, bindingID);
return(SparqlSpecsHelper.EffectiveBooleanValue(value));
}
/// <summary>
/// Gets the boolean value of the string
/// </summary>
/// <returns></returns>
public bool AsBoolean()
{
return(SparqlSpecsHelper.EffectiveBooleanValue(this));
}
/// <summary>
/// Gets the effective boolean value of the function in the given Evaluation Context for the given Binding ID
/// </summary>
/// <param name="context">Evaluation Context</param>
/// <param name="bindingID">Binding ID</param>
/// <returns></returns>
public override bool EffectiveBooleanValue(SparqlEvaluationContext context, int bindingID)
{
return(SparqlSpecsHelper.EffectiveBooleanValue(this.Value(context, bindingID)));
}
