org.openl.rules.util.dates

Class DateInterval

java.lang.Object

org.openl.rules.util.dates.DateInterval

public abstract class DateInterval
extends Object

Abstract class for calculation of difference between two dates in days, weeks, years

Author:

Vladyslav Pikus

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	DateInterval.Scale
static class	DateInterval.Unit

Method Summary

Modifier and Type	Method and Description
static DateInterval	between(Calendar start, Calendar end) Choose a suitable implementation for target date interval
static DateInterval	between(Date start, Date end) Choose a suitable implementation for target date interval
abstract Double	toDays() Calculate a difference in full days.
abstract Double	toDaysExcludeYears() Calculate a difference in full days regarding last year.
abstract Double	toDaysExcludeYearsAndMonths() Calculate a difference in full days regarding last month.
abstract Double	toMonths(DateInterval.Scale scale) Calculate a difference in months.
abstract Double	toMonthsExcludeYears(DateInterval.Scale scale) Calculate a difference in months regarding last year.
abstract Double	toWeeks(DateInterval.Scale scale) Calculate a difference in weeks.
abstract Double	toYears(DateInterval.Scale scale) Calculate a difference in years.

Methods inherited from class java.lang.Object

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

Method Detail

toDays

public abstract Double toDays()

Calculate a difference in full days. The result are always integer. Current implementation is an equivalent to Excel native functions DATEDIF(start, end, "D")

Returns:

difference in full

toWeeks

public abstract Double toWeeks(DateInterval.Scale scale)

Calculate a difference in weeks. If parameter has Scale.INT - the result will be calculated in full weeks, otherwise will contain a fractional part of a last uncompleted week

Parameters:

scale - specifies a scale of the result

Returns:

difference in weeks

toMonths

public abstract Double toMonths(DateInterval.Scale scale)

Calculate a difference in months. If parameter has Scale.INT - the result will be calculated in full months, otherwise will contain a fractional part of a last uncompleted month Current implementation is an equivalent to Excel native functions DATEDIF(start, end, "M")

Parameters:

scale - specifies a scale of the result

Returns:

difference in months

toYears

public abstract Double toYears(DateInterval.Scale scale)

Calculate a difference in years. If parameter has Scale.INT - the result will be calculated in full years, otherwise will contain a fractional part of a last uncompleted year Current implementation is an equivalent to Excel native functions DATEDIF(start, end, "Y")

Parameters:

scale - specifies a scale of the result

Returns:

difference in years

toDaysExcludeYearsAndMonths

public abstract Double toDaysExcludeYearsAndMonths()

Calculate a difference in full days regarding last month. Current implementation is an equivalent to Excel native functions DATEDIF(start, end, "MD")

Returns:

difference in days

toDaysExcludeYears

public abstract Double toDaysExcludeYears()

Calculate a difference in full days regarding last year. Current implementation is an equivalent to Excel native functions DATEDIF(start, end, "YD")

Returns:

difference in days

toMonthsExcludeYears

public abstract Double toMonthsExcludeYears(DateInterval.Scale scale)

Calculate a difference in months regarding last year. If parameter has Scale.INT - the result will be calculated in full months, otherwise will contain a fractional part of a last uncompleted month Current implementation is an equivalent to Excel native functions DATEDIF(start, end, "YM")

Parameters:

scale - specifies a scale of the result

Returns:

difference in months

between

public static DateInterval between(Date start,
                                   Date end)

Choose a suitable implementation for target date interval

Parameters:

start - start date

end - end date

Returns:

between

public static DateInterval between(Calendar start,
                                   Calendar end)

Choose a suitable implementation for target date interval

Parameters:

start - start date

end - end date

Returns: