public SpanOfYears YearsIntervalForPeriod(MonthPeriod period)
{
SpanOfYears[] validSpan = Milestones.Where((x) => SeqOfYears.SelectForPeriod(x, period)).ToArray();
SpanOfYears firstSpan = validSpan.FirstOrDefault();
return(firstSpan == null?SpanOfYears.Empty() : firstSpan);
}
public int CompareTo(object obj)
{
SpanOfYears other = obj as SpanOfYears;
if (this.YearFrom != other.YearFrom)
{
return(this.YearFrom.CompareTo(other.YearFrom));
}
return(this.YearUpto.CompareTo(other.YearUpto));
}
public override bool Equals(object obj)
{
if (obj == this)
{
return(true);
}
if (obj == null || this.GetType() != obj.GetType())
{
return(false);
}
SpanOfYears other = obj as SpanOfYears;
return(this.isEqualToInterval(other));
}
public bool isEqualToInterval(SpanOfYears other)
{
return(this.YearFrom == other.YearFrom && this.YearUpto == other.YearUpto);
}
private static bool SelectForPeriod(SpanOfYears span, MonthPeriod period)
{
return(period.Year() >= span.YearFrom && period.Year() <= span.YearUpto);
}