/// <summary>
/// Compares two values using given operator
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="op">Comparison operator</param>
/// <param name="arg1">The first value</param>
/// <param name="arg2">The second value</param>
/// <returns>Returns true if its left-hand operand meets the operator value to its right-hand operand, false otherwise</returns>
public static bool Compare <T>(ComparisonOperatorTypes op, T arg1, T arg2) where T : IComparable
{
switch (op)
{
case ComparisonOperatorTypes.Equals:
return(arg1.CompareTo(arg2) == 0);
case ComparisonOperatorTypes.NotEqual:
return(arg1.CompareTo(arg2) != 0);
case ComparisonOperatorTypes.Greater:
return(arg1.CompareTo(arg2) == 1);
case ComparisonOperatorTypes.GreaterOrEqual:
return(arg1.CompareTo(arg2) >= 0);
case ComparisonOperatorTypes.Less:
return(arg1.CompareTo(arg2) == -1);
case ComparisonOperatorTypes.LessOrEqual:
return(arg1.CompareTo(arg2) <= 0);
default:
throw new ArgumentOutOfRangeException(nameof(op), $"Operator '{op}' is not supported.");
}
}
/// <summary>
/// Creates a new instance
/// </summary>
public Constraint(string target, ComparisonOperatorTypes @operator, decimal?targetValue) : base(target, targetValue)
{
Operator = @operator;
if (!TargetValue.HasValue)
{
throw new ArgumentNullException(nameof(targetValue), $"Constraint target value is not specified");
}
}
