8007392: JSR 310: DateTime API Updates
8007520: Update date/time classes in j.util and j.sql packages
8007572: Replace existing jdk timezone data at <java.home>/lib/zi with JSR310's tzdb
Summary: Integration of JSR310 Date/Time API for M7
Reviewed-by: darcy, alanb, naoto
Contributed-by: scolebourne@joda.org, roger.riggs@oracle.com, masayoshi.okutsu@oracle.com, patrick.zhang@oracle.com
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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/*
* This file is available under and governed by the GNU General Public
* License version 2 only, as published by the Free Software Foundation.
* However, the following notice accompanied the original version of this
* file:
*
* Copyright (c) 2012, 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:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* * Neither the name of JSR-310 nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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*/
package java.time.chrono;
import java.time.DateTimeException;
import java.time.LocalDate;
/**
* An era in the ISO calendar system.
* <p>
* The ISO-8601 standard does not define eras.
* A definition has therefore been created with two eras - 'Current era' (CE) for
* years from 0001-01-01 (ISO) and 'Before current era' (BCE) for years before that.
* <p>
* <b>Do not use {@code ordinal()} to obtain the numeric representation of {@code IsoEra}.
* Use {@code getValue()} instead.</b>
*
* <h3>Specification for implementors</h3>
* This is an immutable and thread-safe enum.
*
* @since 1.8
*/
enum IsoEra implements Era {
/**
* The singleton instance for the era BCE, 'Before Current Era'.
* The 'ISO' part of the name emphasizes that this differs from the BCE
* era in the Gregorian calendar system.
* This has the numeric value of {@code 0}.
*/
BCE,
/**
* The singleton instance for the era CE, 'Current Era'.
* The 'ISO' part of the name emphasizes that this differs from the CE
* era in the Gregorian calendar system.
* This has the numeric value of {@code 1}.
*/
CE;
//-----------------------------------------------------------------------
/**
* Obtains an instance of {@code IsoEra} from an {@code int} value.
* <p>
* {@code IsoEra} is an enum representing the ISO eras of BCE/CE.
* This factory allows the enum to be obtained from the {@code int} value.
*
* @param era the BCE/CE value to represent, from 0 (BCE) to 1 (CE)
* @return the era singleton, not null
* @throws DateTimeException if the value is invalid
*/
public static IsoEra of(int era) {
switch (era) {
case 0:
return BCE;
case 1:
return CE;
default:
throw new DateTimeException("Invalid era: " + era);
}
}
//-----------------------------------------------------------------------
/**
* Gets the numeric era {@code int} value.
* <p>
* The era BCE has the value 0, while the era CE has the value 1.
*
* @return the era value, from 0 (BCE) to 1 (CE)
*/
@Override
public int getValue() {
return ordinal();
}
@Override
public IsoChronology getChronology() {
return IsoChronology.INSTANCE;
}
// JDK8 default methods:
//-----------------------------------------------------------------------
@Override
public LocalDate date(int year, int month, int day) {
return getChronology().date(this, year, month, day);
}
@Override
public LocalDate dateYearDay(int year, int dayOfYear) {
return getChronology().dateYearDay(this, year, dayOfYear);
}
}