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/*
 * -----------------------------------------------------------------------
 * Copyright © 2013-2016 Meno Hochschild, 
 * -----------------------------------------------------------------------
 * This file (Weekcycle.java) is part of project Time4J.
 *
 * Time4J is free software: You can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published
 * by the Free Software Foundation, either version 2.1 of the License, or
 * (at your option) any later version.
 *
 * Time4J is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with Time4J. If not, see .
 * -----------------------------------------------------------------------
 */

package net.time4j;

import net.time4j.engine.BasicUnit;
import net.time4j.engine.ChronoEntity;
import net.time4j.engine.Chronology;
import net.time4j.engine.UnitRule;

import java.io.ObjectStreamException;
import java.io.Serializable;

import static net.time4j.PlainDate.CALENDAR_DATE;


/**
 * 

Represents a special unit for week-based years which are described by ISO-8601 and * follow the week cycle from Monday to Sunday.

* * @author Meno Hochschild * @since 3.21/4.17 * @doctags.concurrency {immutable} */ /*[deutsch] *

Repräsentiert eine Spezialeinheit für wochenbasierte Jahre, die von ISO-8601 * beschrieben sind und immer dem Wochenzyklus von Montag bis Sonntag folgen.

* * @author Meno Hochschild * @since 3.21/4.17 * @doctags.concurrency {immutable} */ public final class Weekcycle extends BasicUnit implements IsoDateUnit, Serializable { //~ Statische Felder/Initialisierungen -------------------------------- /** *

Constant for week-based years which either have 364 or 371 days.

*/ /*[deutsch] *

Konstante für wochenbasierte Jahre, die entweder 364 oder 371 Tage haben.

*/ public static final Weekcycle YEARS = new Weekcycle(); private static final long serialVersionUID = -4981215347844372171L; //~ Konstruktoren ----------------------------------------------------- private Weekcycle() { // singleton } //~ Methoden ---------------------------------------------------------- /** *

Calculates the temporal distance between given calendar dates * in this calendar unit.

* * @param start starting date * @param end ending date * @return duration as count of this unit */ /*[deutsch] *

Ermittelt den zeitlichen Abstand zwischen den angegebenen * Datumsangaben gemessen in dieser Einheit.

* * @param start starting date * @param end ending date * @return duration as count of this unit */ public long between( PlainDate start, PlainDate end ) { return this.derive(start).between(start, end); } @Override public char getSymbol() { return 'Y'; } @Override public double getLength() { return CalendarUnit.YEARS.getLength(); // same average length as for gregorian years } @Override public boolean isCalendrical() { return true; } @Override public String toString() { return "WEEK_BASED_YEARS"; } @Override protected > UnitRule derive(Chronology chronology) { if (chronology.isRegistered(CALENDAR_DATE)) { return YOWElement.unitRule(); } return null; } private Object readResolve() throws ObjectStreamException { return YEARS; } }




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