net.time4j.calendar.frenchrev

Enum FrenchRepublicanAlgorithm

java.lang.Object

java.lang.Enum<FrenchRepublicanAlgorithm>

net.time4j.calendar.frenchrev.FrenchRepublicanAlgorithm

All Implemented Interfaces:

Serializable, Comparable<FrenchRepublicanAlgorithm>

public enum FrenchRepublicanAlgorithm
extends Enum<FrenchRepublicanAlgorithm>

Various calendar algorithm variants for the French revolutionary calendar.

Since:

3.33/4.28

Author:

Meno Hochschild

Enum Constant Summary

Enum Constants

Enum Constant and Description
EQUINOX The standard legal algorithm of the French revolutionary calendar strictly based on autumnal equinox.
ROMME This algorithmic variant proposed by Charles-Gilbert Romme (leader of the calendar commission) would have treated the republican year as leap year similar to the gregorian calendar rules.

Method Summary

Modifier and Type	Method and Description
static AttributeKey<FrenchRepublicanAlgorithm>	attribute() Format attribute which helps to resolve algorithmic differences between various French republican dates.
boolean	isLeapYear(int fyear) Determines if given republican year is a leap year or not.
static FrenchRepublicanAlgorithm	valueOf(String name) Returns the enum constant of this type with the specified name.
static FrenchRepublicanAlgorithm[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

compareTo, equals, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

EQUINOX

public static final FrenchRepublicanAlgorithm EQUINOX

The standard legal algorithm of the French revolutionary calendar strictly based on autumnal equinox.

ROMME

public static final FrenchRepublicanAlgorithm ROMME

This algorithmic variant proposed by Charles-Gilbert Romme (leader of the calendar commission) would have treated the republican year as leap year similar to the gregorian calendar rules.

Years divisible by four, but leaving out centuries unless divisible by 400 would have been considered as leap years, that is: 16, 20, 24, ..., 96, 104, etc. However, this proposal was never realized because Romme had soon be sent to the guillotine.

Important: This algorithm still applies the equinox rule for all dates before 1806-01-01, the date of the abolition of the French revolutionary calendar.

Method Detail

values

public static FrenchRepublicanAlgorithm[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (FrenchRepublicanAlgorithm c : FrenchRepublicanAlgorithm.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static FrenchRepublicanAlgorithm valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null

attribute

public static AttributeKey<FrenchRepublicanAlgorithm> attribute()

Format attribute which helps to resolve algorithmic differences between various French republican dates.

Standard value is: EQUINOX.

Returns:

format attribute key

isLeapYear

public boolean isLeapYear(int fyear)

Determines if given republican year is a leap year or not.

Parameters:

fyear - the year of French Republic in the French revolutionary calendar

Returns:

true for leap years else false