public BetweenPredicate(IComparer <T> comparer, T lowerBound, T upperBound, BetweenCriteria excludedBounds)
{
if (comparer == null)
{
throw new ArgumentNullException("comparer");
}
_lowerBound = lowerBound;
_upperBound = upperBound;
_criteria = excludedBounds;
_comparison = comparer.Compare;
}
public static bool Between <T>(this T testValue, T lowerValue, T upperValue, BetweenCriteria criteria, bool nullOrder)
where T : class, IComparable <T>
{
switch (criteria)
{
case BetweenCriteria.IncludeBoth:
return(Compare(testValue, lowerValue, ComparisonCriteria.GreaterThanOrEqual, nullOrder) && Compare(testValue, upperValue, ComparisonCriteria.LessThanOrEqual, nullOrder));
case BetweenCriteria.ExcludeLower:
return(Compare(testValue, lowerValue, ComparisonCriteria.GreaterThan, nullOrder) && Compare(testValue, upperValue, ComparisonCriteria.LessThanOrEqual, nullOrder));
case BetweenCriteria.ExcludeUpper:
return(Compare(testValue, lowerValue, ComparisonCriteria.GreaterThanOrEqual, nullOrder) && Compare(testValue, upperValue, ComparisonCriteria.LessThan, nullOrder));
case BetweenCriteria.ExcludeBoth:
return(Compare(testValue, lowerValue, ComparisonCriteria.GreaterThan, nullOrder) && Compare(testValue, upperValue, ComparisonCriteria.LessThan, nullOrder));
default:
throw new InvalidOperationException();
}
}
public static bool Between(this IComparable testValue, object lowerValue, object upperValue, BetweenCriteria criteria, bool nullOrder = false)
{
switch (criteria)
{
case BetweenCriteria.IncludeBoth:
return(Compare(testValue, lowerValue, ComparisonCriteria.GreaterThanOrEqual, nullOrder) && Compare(testValue, upperValue, ComparisonCriteria.LessThanOrEqual, nullOrder));
case BetweenCriteria.ExcludeLower:
return(Compare(testValue, lowerValue, ComparisonCriteria.GreaterThan, nullOrder) && Compare(testValue, upperValue, ComparisonCriteria.LessThanOrEqual, nullOrder));
case BetweenCriteria.ExcludeUpper:
return(Compare(testValue, lowerValue, ComparisonCriteria.GreaterThanOrEqual, nullOrder) && Compare(testValue, upperValue, ComparisonCriteria.LessThan, nullOrder));
case BetweenCriteria.ExcludeBoth:
return(Compare(testValue, lowerValue, ComparisonCriteria.GreaterThan, nullOrder) && Compare(testValue, upperValue, ComparisonCriteria.LessThan, nullOrder));
default:
throw new InvalidOperationException();
}
}
