/// <summary>
/// Executes this modification.
/// </summary>
public bool Execute(IVariantResolver inResolver, object inContext = null, IMethodCache inInvoker = null)
{
Variant operandValue;
if (Operand.TryResolve(inResolver, inContext, out operandValue, inInvoker))
{
return(inResolver.TryModify(inContext, VariableKey, Operator, operandValue));
}
return(false);
}
/// <summary>
/// Evaluates this comparison.
/// </summary>
public bool Evaluate(IVariantResolver inResolver, object inContext = null, IMethodCache inInvoker = null)
{
Variant leftValue, rightValue;
bool bRetrievedLeft = Left.TryResolve(inResolver, inContext, out leftValue, inInvoker);
bool bRetrievedRight = Right.TryResolve(inResolver, inContext, out rightValue, inInvoker);
switch (Operator)
{
case VariantCompareOperator.LessThan:
return(leftValue < rightValue);
case VariantCompareOperator.LessThanOrEqualTo:
return(leftValue <= rightValue);
case VariantCompareOperator.EqualTo:
return(leftValue == rightValue);
case VariantCompareOperator.NotEqualTo:
return(leftValue != rightValue);
case VariantCompareOperator.GreaterThanOrEqualTo:
return(leftValue >= rightValue);
case VariantCompareOperator.GreaterThan:
return(leftValue > rightValue);
case VariantCompareOperator.Exists:
return(bRetrievedLeft);
case VariantCompareOperator.DoesNotExist:
return(!bRetrievedLeft);
case VariantCompareOperator.True:
return(leftValue.AsBool());
case VariantCompareOperator.False:
return(!leftValue.AsBool());
default:
throw new InvalidOperationException("Unknown operator " + Operator.ToString());
}
}