public static DateTime Add(DateTime dateTime, Period periodToAdd)
{
if (periodToAdd == null)
{
throw new ArgumentNullException("periodToAdd");
}
return(periodToAdd.Add(dateTime));
}
/// <summary>
/// Gets the first regular period start date.
/// </summary>
/// <param name="periodInterval">The period interval.</param>
/// <param name="rollConvention">The roll convention.</param>
/// <param name="startDate">The start date.</param>
/// <returns></returns>
public static DateTime GetFirstRegularPeriodStartDate(Period periodInterval, RollConventionEnum rollConvention, DateTime startDate)
{
DateTime advDate = periodInterval.Add(startDate);
DateTime regularPeriodStartDate = advDate;
if (rollConvention != RollConventionEnum.NONE)
{
regularPeriodStartDate = RollConventionEnumHelper.AdjustDate(rollConvention, advDate);
}
return(regularPeriodStartDate);
}
/// <summary>
/// Gets the last regular period end date.
/// </summary>
/// <param name="periodInterval">The period interval.</param>
/// <param name="rollConvention">The roll convention.</param>
/// <param name="endDate">The end date.</param>
/// <returns></returns>
public static DateTime GetLastRegularPeriodEndDate(Period periodInterval, RollConventionEnum rollConvention, DateTime endDate)
{
int periodMultiplierAsInt = int.Parse(periodInterval.periodMultiplier);
if (periodMultiplierAsInt > 0)
{
periodMultiplierAsInt = periodMultiplierAsInt * -1;
}
periodInterval.periodMultiplier = periodMultiplierAsInt.ToString();
DateTime advDate = periodInterval.Add(endDate);
DateTime regularPeriodEndDate = advDate;
if (rollConvention != RollConventionEnum.NONE)
{
regularPeriodEndDate = RollConventionEnumHelper.AdjustDate(rollConvention, advDate);
}
return(regularPeriodEndDate);
}
/// <summary>
/// Generates the unadjusted calculation dates.
/// </summary>
/// <param name="effectiveDate">The effective date.</param>
/// <param name="intervalToTerminationDate">The interval to termination date.</param>
/// <param name="periodInterval">The period interval.</param>
/// <param name="rollConvention">The roll convention.</param>
/// <returns></returns>
static public List <CalculationPeriod> GenerateUnadjustedCalculationDates(DateTime effectiveDate, Period intervalToTerminationDate, Period periodInterval, RollConventionEnum rollConvention)
{
DateTime startDate = effectiveDate;
// Adjust the effective date
if (rollConvention != RollConventionEnum.NONE)
{
startDate = RollConventionEnumHelper.AdjustDate(rollConvention, effectiveDate);
}
Double divisor = IntervalHelper.Div(intervalToTerminationDate, periodInterval);
// The divisor has to be a whole number (i.e. the period must roll to the term date interval
if ((divisor % 1) != 0)
{
throw new ArithmeticException("The period frequency will not roll to the supplied termination date interval");
}
DateTime terminationDate = intervalToTerminationDate.Add(startDate);
StubPeriodTypeEnum?stubPeriodType = null;
return(GenerateUnadjustedCalculationDates(startDate, terminationDate, effectiveDate, periodInterval, rollConvention, stubPeriodType));
}
