mirror of https://github.com/octoleo/plantuml.git
119 lines
3.3 KiB
Java
119 lines
3.3 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 2009-2017, 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.project3;
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public class DayAsDate implements Complement, Comparable<DayAsDate> {
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private final int year;
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private final int dayOfMonth;
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private final Month month;
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public static DayAsDate create(int year, String month, int dayOfMonth) {
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return new DayAsDate(year, Month.fromString(month), dayOfMonth);
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}
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public static DayAsDate create(int year, int month, int dayOfMonth) {
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return new DayAsDate(year, Month.values()[month - 1], dayOfMonth);
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}
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private DayAsDate(int year, Month month, int dayOfMonth) {
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this.year = year;
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this.dayOfMonth = dayOfMonth;
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this.month = month;
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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 "" + year + "/" + month + "/" + dayOfMonth;
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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 DayAsDate next() {
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int newDayOfMonth = dayOfMonth + 1;
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if (newDayOfMonth <= daysPerMonth()) {
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return new DayAsDate(year, month, newDayOfMonth);
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}
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assert newDayOfMonth > daysPerMonth();
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newDayOfMonth = 1;
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final Month newMonth = month.next();
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final int newYear = newMonth == Month.JANUARY ? year + 1 : year;
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return new DayAsDate(newYear, newMonth, newDayOfMonth);
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}
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public Month getMonth() {
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return month;
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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 InstantDay asInstantDay(DayAsDate reference) {
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// if (this.compareTo(reference) < 0) {
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// throw new IllegalArgumentException();
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// }
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int cmp = 0;
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DayAsDate current = reference;
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while (current.compareTo(this) < 0) {
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current = current.next();
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cmp++;
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}
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return new InstantDay(cmp);
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}
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public int compareTo(DayAsDate other) {
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return this.internalNumber() - other.internalNumber();
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}
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}
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