booster::locale::abstract_calendar Class Reference

#include <booster/booster/locale/date_time_facet.h>

Public Types
enum	value_type {   absolute_minimum, actual_minimum, greatest_minimum, current,   least_maximum, actual_maximum, absolute_maximum }
enum	update_type { move, roll }
enum	calendar_option_type { is_gregorian, is_dst }

Public Member Functions
virtual abstract_calendar *	clone () const =0
virtual void	set_value (period::marks::period_mark p, int value)=0
virtual void	normalize ()=0
virtual int	get_value (period::marks::period_mark p, value_type v) const =0
virtual void	set_time (posix_time const &p)=0
virtual posix_time	get_time () const =0
virtual void	set_option (calendar_option_type opt, int v)=0
virtual int	get_option (calendar_option_type opt) const =0
virtual void	adjust_value (period::marks::period_mark p, update_type u, int difference)=0
virtual int	difference (abstract_calendar const *other, period::marks::period_mark p) const =0
virtual void	set_timezone (std::string const &tz)=0
virtual std::string	get_timezone () const =0
virtual bool	same (abstract_calendar const *other) const =0

Detailed Description

This class defines generic calendar class, it is used by date_time and calendar objects internally. It is less useful for end users, but it is build for localization backend implementation

Member Enumeration Documentation

enum booster::locale::abstract_calendar::calendar_option_type

Information about calendar

Enumerator
is_gregorian	Check if the calendar is Gregorian.
is_dst	Check if the current time is in daylight time savings.

enum booster::locale::abstract_calendar::update_type

A way to update the value

Enumerator
move	Change the value up or down effecting others for example 1990-12-31 + 1 day = 1991-01-01.
roll	Change the value up or down not effecting others for example 1990-12-31 + 1 day = 1990-12-01.

enum booster::locale::abstract_calendar::value_type

Type that defines how to fetch the value

Enumerator
absolute_minimum	Absolute possible minimum for the value, for example for day is 1.
actual_minimum	Actual minimal value for this period.
greatest_minimum	Maximal minimum value that can be for this period.
current	Current value of this period.
least_maximum	The last maximal value for this period, For example for Gregorian calendar day it is 28
actual_maximum	Actual maximum, for it can be 28, 29, 30, 31 for day according to current month.
absolute_maximum	Maximal value, for Gregorian day it would be 31.

Member Function Documentation

virtual void booster::locale::abstract_calendar::adjust_value ( period::marks::period_mark  p, update_type  u, int  difference  )

pure virtual

Adjust period's p value by difference items using a update_type u. Note: not all values are adjustable

virtual abstract_calendar* booster::locale::abstract_calendar::clone ( ) const

pure virtual

Make a polymorphic copy of the calendar

virtual int booster::locale::abstract_calendar::difference ( abstract_calendar const *  other, period::marks::period_mark  p  ) const

pure virtual

Calculate the difference between this calendar and other in p units

virtual int booster::locale::abstract_calendar::get_option ( calendar_option_type  opt ) const

pure virtual

Get option for calendar, currently only check if it is Gregorian calendar

virtual posix_time booster::locale::abstract_calendar::get_time ( ) const

pure virtual

Get current time point

virtual std::string booster::locale::abstract_calendar::get_timezone ( ) const

pure virtual

Get current time zone, empty - system one

virtual int booster::locale::abstract_calendar::get_value ( period::marks::period_mark  p, value_type  v  ) const

pure virtual

Get specific value for period p according to a value_type v

virtual void booster::locale::abstract_calendar::normalize ( )

pure virtual

Recalculate all periods after setting them, should be called after use of set_value() function.

virtual bool booster::locale::abstract_calendar::same ( abstract_calendar const *  other ) const

pure virtual

Check of two calendars have same rules

virtual void booster::locale::abstract_calendar::set_option ( calendar_option_type  opt, int  v  )

pure virtual

Set option for calendar, for future use

virtual void booster::locale::abstract_calendar::set_time ( posix_time const &  p )

pure virtual

Set current time point

virtual void booster::locale::abstract_calendar::set_timezone ( std::string const &  tz )

pure virtual

Set time zone, empty - use system

virtual void booster::locale::abstract_calendar::set_value ( period::marks::period_mark  p, int  value  )

pure virtual

Set specific value for period p, note not all values are settable.

After call of set_value you may want to call normalize() function to make sure vall periods are updated, if you set sereral fields that are part of single date/time representation you should call set_value several times and then call normalize().

If normalize() is not called after set_value, the behavior is undefined

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The documentation for this class was generated from the following file:

• booster/locale/date_time_facet.h