public bool Check(object fieldValue, Type fieldType)
{
int compResult =
fieldType.IsValueType
? ValueContractHelper.Check(fieldValue, otherValue, fieldType)
: Comparer.Default.Compare(fieldValue, otherValue);
ValueCompareMode mode = this.mode;
if (mode == ValueCompareMode.Equals)
{
return(compResult == 0);
}
else if (mode == ValueCompareMode.Inequals)
{
return(compResult != 0);
}
else if (mode == ValueCompareMode.Lesser)
{
return(compResult < 0);
}
else if (mode == ValueCompareMode.LessOrEqual)
{
return(compResult <= 0);
}
else if (mode == ValueCompareMode.Greater)
{
return(compResult > 0);
}
else
{
return(compResult >= 0);
}
}
/// <summary>
/// 필드가 좌측 피연산자가 됩니다.
/// <para/>
/// 가령 '<see cref="ValueCompareMode.Lesser"/>'의 경우
/// '필드 값이 <paramref name="otherValue"/> 보다 작다'라는 뜻이 됩니다.
/// </summary>
public ValueContractAttribute(object otherValue, ValueCompareMode mode)
{
this.otherValue = otherValue;
if (mode < ValueCompareMode.Equals || mode > ValueCompareMode.GreatOrEqual)
{
// 범위 초과
this.mode = ValueCompareMode.Equals;
}
else if (otherValue.GetType().IsValueType == false && mode > ValueCompareMode.Inequals)
{
// 부적절한 비교연산자
this.mode =
mode >= ValueCompareMode.Greater
? ValueCompareMode.Equals
: ValueCompareMode.Inequals;
}
else
{
this.mode = mode;
}
}
