/// <summary>
/// Initializes new instance of a time interval from the interfaces an upper and a lower interval reference values.
/// </summary>
/// <param name="upper">The interface to the upper interval boundary to set the interval with.</param>
/// <param name="lower">The interface to the lower interval boundary to set the interval with.</param>
/// <param name="type">The time interval flexibility mode to set to the time interval.</param>
public TimeInterval(IIntervalUpper <DateTime> upper, IIntervalLower <DateTime> lower, IntervalType type = IntervalType.Flex)
{
_limits = IntervalLimits.Lower | IntervalLimits.Upper;
if (upper != null)
{
if (upper.UpperInclude)
{
_limits &= ~IntervalLimits.Lower;
}
_lower = upper.Upper;
}
if (lower != null)
{
if (upper == null)
{
_lower = lower.Lower;
}
if (lower.LowerInclude)
{
_limits &= ~IntervalLimits.Upper;
}
_upper = lower.Lower;
}
_span = _upper - _lower;
Type = type;
}
/// <summary>
/// Compares two interfaces to the lower contiguous interval boundaries.
/// </summary>
/// <param name="x">The 1-st lower contiguous interval boundary to compare.</param>
/// <param name="y">The 2-nd lower contiguous interval boundary to compare.</param>
/// <returns>A value that indicates the relative order of the objects being compared. The return value has these meanings: Value Meaning Less
/// than zero This instance precedes other in the sort order. Zero This instance occurs in the same position in the sort order as other.
/// Greater than zero This instance follows other in the sort order.</returns>
public static int CompareLower(IIntervalLower <T> x, IIntervalLower <T> y)
{
if (!(x is null))
{
if (!(y is null))
{
switch (Comparer <T?> .Default.Compare(x.Lower, y.Lower))
{
case 0: return(Comparer <bool> .Default.Compare(x.LowerInclude, y.LowerInclude));
case int result when x.Lower == null: return(-1);
case int result when y.Lower == null: return(1);
case int result: return(result);
}
}
/// <summary>
/// Initializes the new instance of the stream block fragment based on upper and lower range/span limit values.
/// </summary>
/// <param name="upper">The interface to the upper interval boundary to set the interval with.</param>
/// <param name="lower">The interface to the lower interval boundary to set the interval with.</param>
public Fragment(IIntervalUpper <DateTime> upper, IIntervalLower <DateTime> lower)
{
_interval = new TimeInterval(upper, lower);
}
