/// <summary>
/// Method to compare two objects
/// </summary>
/// <param name="leftOperand"></param>
/// <param name="operatorType"></param>
/// <param name="rightOperand"></param>
/// <returns></returns>
internal static bool Evaluate(object leftOperand, ComparisonConditionType operatorType, object rightOperand)
{
if (leftOperand != null)
{
if (rightOperand != null)
{
object newValue = PlatformServices.ConvertType(rightOperand, leftOperand.GetType());
if (newValue != null)
{
rightOperand = newValue;
}
}
}
IComparable comparable = leftOperand as IComparable;
IComparable comparable2 = rightOperand as IComparable;
if ((comparable != null) && (comparable2 != null))
{
return(EvaluateComparable(comparable, operatorType, comparable2));
}
switch (operatorType)
{
case ComparisonConditionType.Equal:
return(Equals(leftOperand, rightOperand));
case ComparisonConditionType.NotEqual:
return(!Equals(leftOperand, rightOperand));
case ComparisonConditionType.LessThan:
case ComparisonConditionType.LessThanOrEqual:
case ComparisonConditionType.GreaterThan:
case ComparisonConditionType.GreaterThanOrEqual:
if ((comparable == null) && (comparable2 == null))
{
throw new ArgumentException("Operands must implement IComparable");
}
if (comparable == null)
{
throw new ArgumentException("Invalid left operand - must implement IComparable");
}
throw new ArgumentException("Invalid right operand - must implement IComparable.");
}
return(false);
}
