org.joda.time.chrono
Class CopticChronology

java.lang.Object
  org.joda.time.Chronology
      org.joda.time.chrono.BaseChronology
          org.joda.time.chrono.AssembledChronology
              org.joda.time.chrono.CopticChronology

All Implemented Interfaces:

Serializable

public final class CopticChronology
extends AssembledChronology

Implements the Coptic calendar system, which defines every fourth year as leap, much like the Julian calendar. The year is broken down into 12 months, each 30 days in length. An extra period at the end of the year is either 5 or 6 days in length. In this implementation, it is considered a 13th month.

Year 1 in the Coptic calendar began on August 29, 284 CE (Julian), thus Coptic years do not begin at the same time as Julian years. This chronology is not proleptic, as it does not allow dates before the first Coptic year.

This implementation defines a day as midnight to midnight exactly as per the ISO chronology. Some references indicate that a coptic day starts at sunset on the previous ISO day, but this has not been confirmed and is not implemented.

CopticChronology is thread-safe and immutable.

Since:

1.0

Author:

Brian S O'Neill

See Also:

Wikipedia, JulianChronology, Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.joda.time.chrono.AssembledChronology

AssembledChronology.Fields

Field Summary

static int

AM Constant value for 'Anno Martyrum' or 'Era of the Martyrs', equivalent to the value returned for AD/CE.

Method Summary

protected void	assemble(AssembledChronology.Fields fields) Invoked by the constructor and after deserialization to allow subclasses to define all of its supported fields.
boolean	equals(Object obj) Checks if this chronology instance equals another.
long	getDateTimeMillis(int year, int monthOfYear, int dayOfMonth, int millisOfDay) Returns a datetime millisecond instant, formed from the given year, month, day, and millisecond values.
long	getDateTimeMillis(int year, int monthOfYear, int dayOfMonth, int hourOfDay, int minuteOfHour, int secondOfMinute, int millisOfSecond) Returns a datetime millisecond instant, formed from the given year, month, day, hour, minute, second, and millisecond values.
static CopticChronology	getInstance() Gets an instance of the CopticChronology in the default time zone.
static CopticChronology	getInstance(DateTimeZone zone) Gets an instance of the CopticChronology in the given time zone.
static CopticChronology	getInstance(DateTimeZone zone, int minDaysInFirstWeek) Gets an instance of the CopticChronology in the given time zone.
static CopticChronology	getInstanceUTC() Gets an instance of the CopticChronology.
int	getMinimumDaysInFirstWeek()
DateTimeZone	getZone() Returns the DateTimeZone that this Chronology operates in, or null if unspecified.
int	hashCode() A suitable hash code for the chronology.
String	toString() Gets a debugging toString.
Chronology	withUTC() Gets the Chronology in the UTC time zone.
Chronology	withZone(DateTimeZone zone) Gets the Chronology in a specific time zone.

Methods inherited from class org.joda.time.chrono.AssembledChronology

centuries, centuryOfEra, clockhourOfDay, clockhourOfHalfday, dayOfMonth, dayOfWeek, dayOfYear, days, era, eras, getBase, getDateTimeMillis, getParam, halfdayOfDay, halfdays, hourOfDay, hourOfHalfday, hours, millis, millisOfDay, millisOfSecond, minuteOfDay, minuteOfHour, minutes, monthOfYear, months, secondOfDay, secondOfMinute, seconds, weekOfWeekyear, weeks, weekyear, weekyearOfCentury, weekyears, year, yearOfCentury, yearOfEra, years

Methods inherited from class org.joda.time.chrono.BaseChronology

add, add, get, get, get, set, validate

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

AM

public static final int AM

Constant value for 'Anno Martyrum' or 'Era of the Martyrs', equivalent to the value returned for AD/CE.

See Also:

Constant Field Values

Method Detail

getInstanceUTC

public static CopticChronology getInstanceUTC()

Gets an instance of the CopticChronology. The time zone of the returned instance is UTC.

Returns:

a singleton UTC instance of the chronology

getInstance

public static CopticChronology getInstance()

Gets an instance of the CopticChronology in the default time zone.

Returns:

a chronology in the default time zone

getInstance

public static CopticChronology getInstance(DateTimeZone zone)

Gets an instance of the CopticChronology in the given time zone.

Parameters:

zone - the time zone to get the chronology in, null is default

Returns:

a chronology in the specified time zone

getInstance

public static CopticChronology getInstance(DateTimeZone zone,
                                           int minDaysInFirstWeek)

Gets an instance of the CopticChronology in the given time zone.

Parameters:

zone - the time zone to get the chronology in, null is default

minDaysInFirstWeek - minimum number of days in first week of the year; default is 4

Returns:

a chronology in the specified time zone

withUTC

public Chronology withUTC()

Gets the Chronology in the UTC time zone.

Specified by:

withUTC in class BaseChronology

Returns:

the chronology in UTC

withZone

public Chronology withZone(DateTimeZone zone)

Gets the Chronology in a specific time zone.

Specified by:

withZone in class BaseChronology

Parameters:

zone - the zone to get the chronology in, null is default

Returns:

the chronology

See Also:

ZonedChronology

assemble

protected void assemble(AssembledChronology.Fields fields)

Description copied from class: AssembledChronology

Invoked by the constructor and after deserialization to allow subclasses to define all of its supported fields. All unset fields default to unsupported instances.

Parameters:

fields - container of fields

getZone

public DateTimeZone getZone()

Description copied from class: BaseChronology

Returns the DateTimeZone that this Chronology operates in, or null if unspecified.

Overrides:

getZone in class AssembledChronology

Returns:

DateTimeZone null if unspecified

getDateTimeMillis

public long getDateTimeMillis(int year,
                              int monthOfYear,
                              int dayOfMonth,
                              int millisOfDay)
                       throws IllegalArgumentException

Description copied from class: BaseChronology

Returns a datetime millisecond instant, formed from the given year, month, day, and millisecond values. The set of given values must refer to a valid datetime, or else an IllegalArgumentException is thrown.

The default implementation calls upon separate DateTimeFields to determine the result. Subclasses are encouraged to provide a more efficient implementation.

Overrides:

getDateTimeMillis in class AssembledChronology

Parameters:

year - year to use

monthOfYear - month to use

dayOfMonth - day of month to use

millisOfDay - millisecond to use

Returns:

millisecond instant from 1970-01-01T00:00:00Z

Throws:

IllegalArgumentException - if the values are invalid

getDateTimeMillis

public long getDateTimeMillis(int year,
                              int monthOfYear,
                              int dayOfMonth,
                              int hourOfDay,
                              int minuteOfHour,
                              int secondOfMinute,
                              int millisOfSecond)
                       throws IllegalArgumentException

Description copied from class: BaseChronology

Returns a datetime millisecond instant, formed from the given year, month, day, hour, minute, second, and millisecond values. The set of given values must refer to a valid datetime, or else an IllegalArgumentException is thrown.

The default implementation calls upon separate DateTimeFields to determine the result. Subclasses are encouraged to provide a more efficient implementation.

Overrides:

getDateTimeMillis in class AssembledChronology

Parameters:

year - year to use

monthOfYear - month to use

dayOfMonth - day of month to use

hourOfDay - hour to use

minuteOfHour - minute to use

secondOfMinute - second to use

millisOfSecond - millisecond to use

Returns:

millisecond instant from 1970-01-01T00:00:00Z

Throws:

IllegalArgumentException - if the values are invalid

getMinimumDaysInFirstWeek

public int getMinimumDaysInFirstWeek()

equals

public boolean equals(Object obj)

Checks if this chronology instance equals another.

Overrides:

equals in class Object

Parameters:

obj - the object to compare to

Returns:

true if equal

Since:

1.6

hashCode

public int hashCode()

A suitable hash code for the chronology.

Overrides:

hashCode in class Object

Returns:

the hash code

Since:

1.6

toString

public String toString()

Gets a debugging toString.

Specified by:

toString in class BaseChronology

Returns:

a debugging string