org.zkoss.poi.ss.formula.atp

Class WorkdayCalculator

java.lang.Object

org.zkoss.poi.ss.formula.atp.WorkdayCalculator

public class WorkdayCalculator
extends Object

A calculator for workdays, considering dates as excel representations.

Author:

jfaenomoto@gmail.com

Field Summary

Fields

Modifier and Type	Field and Description
static WorkdayCalculator	instance

Method Summary

Modifier and Type	Method and Description
protected int	calculateNonWeekendHolidays(double start, double end, double[] holidays) Calculates how many holidays in a list are workdays, considering an interval of dates.
int	calculateWorkdays(double start, double end, double[] holidays) Calculate how many workdays are there between a start and an end date, as excel representations, considering a range of holidays.
Date	calculateWorkdays(double start, int workdays, double[] holidays) Calculate the workday past x workdays from a starting date, considering a range of holidays.
protected boolean	isHoliday(double aDate, double[] holidays)
protected boolean	isInARange(double start, double end, double aDate)
protected int	isNonWorkday(double aDate, double[] holidays)
protected boolean	isWeekend(double aDate)
protected int	pastDaysOfWeek(double start, double end, int dayOfWeek) Calculates how many days of week past between a start and an end date.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

instance

public static final WorkdayCalculator instance

Method Detail

calculateWorkdays

public int calculateWorkdays(double start,
                             double end,
                             double[] holidays)

Calculate how many workdays are there between a start and an end date, as excel representations, considering a range of holidays.

Parameters:

start - start date.

end - end date.

holidays - an array of holidays.

Returns:

number of workdays between start and end dates, including both dates.

calculateWorkdays

public Date calculateWorkdays(double start,
                              int workdays,
                              double[] holidays)

Calculate the workday past x workdays from a starting date, considering a range of holidays.

Parameters:

start - start date.

workdays - number of workdays to be past from starting date.

holidays - an array of holidays.

Returns:

date past x workdays.

pastDaysOfWeek

protected int pastDaysOfWeek(double start,
                             double end,
                             int dayOfWeek)

Calculates how many days of week past between a start and an end date.

Parameters:

start - start date.

end - end date.

dayOfWeek - a day of week as represented by Calendar constants.

Returns:

how many days of week past in this interval.

calculateNonWeekendHolidays

protected int calculateNonWeekendHolidays(double start,
                                          double end,
                                          double[] holidays)

Calculates how many holidays in a list are workdays, considering an interval of dates.

Parameters:

start - start date.

end - end date.

holidays - an array of holidays.

Returns:

number of holidays that occur in workdays, between start and end dates.

isWeekend

protected boolean isWeekend(double aDate)

Parameters:

aDate - a given date.

Returns:

true if date is weekend, false otherwise.

isHoliday

protected boolean isHoliday(double aDate,
                            double[] holidays)

Parameters:

aDate - a given date.

holidays - an array of holidays.

Returns:

true if date is a holiday, false otherwise.

isNonWorkday

protected int isNonWorkday(double aDate,
                           double[] holidays)

Parameters:

aDate - a given date.

holidays - an array of holidays.

Returns:

1 is not a workday, 0 otherwise.

isInARange

protected boolean isInARange(double start,
                             double end,
                             double aDate)

Parameters:

start - start date.

end - end date.

aDate - a date to be analyzed.

Returns:

true if aDate is between start and end dates, false otherwise.