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Additional functionality that enhances JSR-310 dates and times in Java SE 8 and later

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/*
 * Copyright (c) 2007-present, Stephen Colebourne & Michael Nascimento Santos
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
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 *  * Neither the name of JSR-310 nor the names of its contributors
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package org.threeten.extra.chrono;

import java.time.DateTimeException;
import java.time.chrono.Era;

/**
 * An era in the International Fixed calendar system.
 * 

* The International Fixed calendar system only has one era. * The current era, for years from 1 onwards, is known as 'Current Era'. * All previous years are invalid. *

* The start of the International Fixed epoch {@code 0001/01/01 (IFC)} is {@code 0001-01-01 (ISO)}. *

* Do not use {@code ordinal()} to obtain the numeric representation of {@code InternationalFixedEra}. * Use {@code getValue()} instead. * *

Implementation Requirements:

* This is an immutable and thread-safe enum. */ public enum InternationalFixedEra implements Era { /** * The singleton instance for the current era, 'Current Era', * which has the numeric value 1. */ CE; //----------------------------------------------------------------------- /** * Obtains an instance of {@code InternationalFixedEra} from an {@code int} value. *

* {@code InternationalFixedEra} is an enum representing the International Fixed era of CE. * This factory allows the enum to be obtained from the {@code int} value. * * @param era the CE value to represent, only 1 (CE) * @return the era singleton, not null * @throws DateTimeException if the value is invalid */ public static InternationalFixedEra of(final int era) { if (era == 1) { return CE; } throw new DateTimeException("Invalid era: " + era); } //----------------------------------------------------------------------- /** * Gets the numeric era {@code int} value. *

* The era CE has the value 1. * * @return the era value, only 1 (CE) */ @Override public int getValue() { return ordinal(); } }





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