Class JulianDayCalendar

java.lang.Object

net.okapia.osid.primordium.calendaring.framework.spi.AbstractCalendarInfo

net.okapia.osid.primordium.calendaring.framework.spi.AbstractDayCountCalendar

net.okapia.osid.primordium.calendaring.datetime.counting.definitions.JulianDayCalendar

All Implemented Interfaces:

Serializable, CalendarInfo

public final class JulianDayCalendar
extends AbstractDayCountCalendar

The Julian Day number: a continuous count of days used throughout astronomy and chronology, devised by Joseph Justus Scaliger in 1583 and named for his father, Julius Caesar Scaliger. It is a counting calendar -- each unit is one day, with no months or weeks. Day zero begins at noon Universal Time on 1 January 4713 BC in the proleptic Julian calendar (Julian Day 0). Its calendar type is CountingCalendarTypes.JULIAN_DAY, and it is paired with NoTimeSystemTimeDefinition.

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
JulianDayCalendar()	Constructs a new JulianDayCalendar.

Method Summary

Modifier and Type	Method	Description
Type	getCalendarType()	Gets the calendar type.
DisplayText	getDescription()	Gets the calendar description.
long	getEpochAsJulianDay()	Gets the fixed epoch Julian Day; valid when CalendarInfo.isEpochFixed().
DisplayText	getName()	Gets the calendar name.

Methods inherited from class AbstractDayCountCalendar

getMainDivision, isEpochFixed

Modifier and Type	Method	Description
CalendarDivision	getMainDivision()	Gets the main (top) division -- the year.
boolean	isEpochFixed()	Tests whether the epoch is a fixed Julian Day.

Methods inherited from class AbstractCalendarInfo

getCycles, getEpochRule, isDeterministic, isEpochDerived

Modifier and Type	Method	Description
CalendarCycle[]	getCycles()	Gets the free-running cycles (the weekday) that ride alongside the division tree.
EpochRule	getEpochRule()	Gets the epoch derivation rule; valid when CalendarInfo.isEpochDerived().
boolean	isDeterministic()	Tests whether rollover and leaping are predictable -- the condition for converting this calendar to another.
boolean	isEpochDerived()	Tests whether the epoch is derived from a rule.

Methods inherited from class Object

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

Methods inherited from interface CalendarInfo

getEpochAbbrev, getEpochName, getPreEpochAbbrev, getPreEpochName, isEpochNamed, startsDayAtStartOfClock

Modifier and Type	Method	Description
default DisplayText	getEpochAbbrev()	Gets the short form of the name of the time from the epoch onward, as AD abbreviates Anno Domini; valid when CalendarInfo.isEpochNamed().
default DisplayText	getEpochName()	Gets the name of the time from the epoch onward, as Anno Domini names it in the Gregorian calendar; valid when CalendarInfo.isEpochNamed().
default DisplayText	getPreEpochAbbrev()	Gets the short form of the name of the time before the first day of the calendar, as BC abbreviates Before Christ; valid when CalendarInfo.isEpochNamed().
default DisplayText	getPreEpochName()	Gets the name of the time before the first day of the calendar, as Before Christ names it in the Gregorian calendar; valid when CalendarInfo.isEpochNamed().
default boolean	isEpochNamed()	Tests whether the calendar names the time on either side of its epoch.
default boolean	startsDayAtStartOfClock()	Tests whether this calendar's day begins at the start of the clock -- the zero of the time of day (midnight on a 24-hour clock) -- as opposed to an offset reckoning such as sunset (Hebrew, Islamic) or sunrise.

Constructor Details

JulianDayCalendar

public JulianDayCalendar()

Constructs a new JulianDayCalendar.

Method Details

getName

public DisplayText getName()

Description copied from interface: CalendarInfo

Gets the calendar name.

Specified by:

getName in interface CalendarInfo

Overrides:

getName in class AbstractCalendarInfo

Returns:

the name

getDescription

public DisplayText getDescription()

Description copied from interface: CalendarInfo

Gets the calendar description.

Specified by:

getDescription in interface CalendarInfo

Overrides:

getDescription in class AbstractCalendarInfo

Returns:

the description

getCalendarType

public Type getCalendarType()

Description copied from interface: CalendarInfo

Gets the calendar type.

Specified by:

getCalendarType in interface CalendarInfo

Overrides:

getCalendarType in class AbstractCalendarInfo

Returns:

the calendar type

getEpochAsJulianDay

public long getEpochAsJulianDay()

Description copied from interface: CalendarInfo

Gets the fixed epoch Julian Day; valid when CalendarInfo.isEpochFixed().

Specified by:

getEpochAsJulianDay in interface CalendarInfo

Overrides:

getEpochAsJulianDay in class AbstractCalendarInfo

Returns:

the epoch Julian Day