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192 lines
4.8 KiB
Java
192 lines
4.8 KiB
Java
/* ========================================================================
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* PlantUML : a free UML diagram generator
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* ========================================================================
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*
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* (C) Copyright 2009-2020, Arnaud Roques
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*
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* Project Info: http://plantuml.com
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*
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* If you like this project or if you find it useful, you can support us at:
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*
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* http://plantuml.com/patreon (only 1$ per month!)
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* http://plantuml.com/paypal
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*
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* This file is part of PlantUML.
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*
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* PlantUML is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* PlantUML distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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* License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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* USA.
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*
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*
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* Original Author: Arnaud Roques
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*
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*
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*/
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package net.sourceforge.plantuml.project.time;
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import java.util.Calendar;
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import java.util.TimeZone;
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import net.sourceforge.plantuml.project.Value;
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public class Day implements Comparable<Day>, Value {
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static final public long MILLISECONDS_PER_DAY = 1000L * 3600L * 24;
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static final private Calendar gmt = Calendar.getInstance(TimeZone.getTimeZone("GMT"));
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private final int dayOfMonth;
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private final MonthYear monthYear;
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private final long ms1;
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public static Day create(int year, String month, int dayOfMonth) {
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return new Day(year, Month.fromString(month), dayOfMonth);
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}
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public static Day create(int year, int month, int dayOfMonth) {
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return new Day(year, Month.values()[month - 1], dayOfMonth);
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}
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public static Day create(long ms) {
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return new Day(ms);
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}
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public static Day today() {
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return create(System.currentTimeMillis());
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}
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public int getWeekOfYear(WeekNumberStrategy strategy) {
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synchronized (gmt) {
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gmt.clear();
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gmt.setTimeInMillis(ms1);
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gmt.setFirstDayOfWeek(strategy.getFirstDayOfWeekAsLegacyInt());
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gmt.setMinimalDaysInFirstWeek(strategy.getMinimalDaysInFirstWeek());
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return gmt.get(Calendar.WEEK_OF_YEAR);
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}
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}
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private Day(int year, Month month, int dayOfMonth) {
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this.dayOfMonth = dayOfMonth;
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this.monthYear = MonthYear.create(year, month);
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synchronized (gmt) {
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gmt.clear();
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gmt.set(year, month.ordinal(), dayOfMonth);
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this.ms1 = gmt.getTimeInMillis();
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}
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}
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private Day(long ms) {
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this.ms1 = ms;
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synchronized (gmt) {
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gmt.clear();
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gmt.setTimeInMillis(ms);
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final int year = gmt.get(Calendar.YEAR);
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final int month = gmt.get(Calendar.MONTH);
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final int dayOfMonth = gmt.get(Calendar.DAY_OF_MONTH);
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this.dayOfMonth = dayOfMonth;
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this.monthYear = MonthYear.create(year, Month.values()[month]);
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}
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}
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public Day increment() {
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return addDays(1);
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}
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public Day decrement() {
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return addDays(-1);
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}
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public Day addDays(int nday) {
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return create(MILLISECONDS_PER_DAY * (getAbsoluteDayNum() + nday));
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}
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public final int getAbsoluteDayNum() {
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return (int) (ms1 / MILLISECONDS_PER_DAY);
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}
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public final long getMillis() {
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return ms1;
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}
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public int year() {
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return monthYear.year();
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}
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private int internalNumber() {
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return year() * 100 * 100 + month().ordinal() * 100 + dayOfMonth;
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}
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@Override
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public String toString() {
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return monthYear.toString() + "/" + dayOfMonth;
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}
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@Override
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public int hashCode() {
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return monthYear.hashCode() + dayOfMonth * 17;
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}
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@Override
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public boolean equals(Object obj) {
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final Day other = (Day) obj;
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return other.internalNumber() == this.internalNumber();
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}
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public final int getDayOfMonth() {
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return dayOfMonth;
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}
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private int daysPerMonth() {
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return month().getDaysPerMonth(year());
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}
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public Month month() {
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return monthYear.month();
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}
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public MonthYear monthYear() {
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return monthYear;
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}
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// https://en.wikipedia.org/wiki/Zeller%27s_congruence
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public DayOfWeek getDayOfWeek() {
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final int q = dayOfMonth;
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final int m = month().m();
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final int y = m >= 13 ? year() - 1 : year();
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final int k = y % 100;
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final int j = y / 100;
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final int h = ((q + 13 * (m + 1) / 5) + k + k / 4 + j / 4 + 5 * j) % 7;
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return DayOfWeek.fromH(h);
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}
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public int compareTo(Day other) {
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return this.internalNumber() - other.internalNumber();
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}
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public static Day min(Day wink1, Day wink2) {
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if (wink2.internalNumber() < wink1.internalNumber()) {
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return wink2;
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}
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return wink1;
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}
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public static Day max(Day wink1, Day wink2) {
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if (wink2.internalNumber() > wink1.internalNumber()) {
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return wink2;
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}
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return wink1;
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}
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}
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