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Diffstat (limited to 'src/net/sourceforge/plantuml/project/DayAsDate.java')
| -rw-r--r-- | src/net/sourceforge/plantuml/project/DayAsDate.java | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/src/net/sourceforge/plantuml/project/DayAsDate.java b/src/net/sourceforge/plantuml/project/DayAsDate.java new file mode 100644 index 0000000..a9b0b97 --- /dev/null +++ b/src/net/sourceforge/plantuml/project/DayAsDate.java @@ -0,0 +1,181 @@ +/* ======================================================================== + * PlantUML : a free UML diagram generator + * ======================================================================== + * + * (C) Copyright 2009-2020, Arnaud Roques + * + * Project Info: http://plantuml.com + * + * If you like this project or if you find it useful, you can support us at: + * + * http://plantuml.com/patreon (only 1$ per month!) + * http://plantuml.com/paypal + * + * This file is part of PlantUML. + * + * PlantUML is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * PlantUML 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 General Public + * License for more details. + * + * You should have received a copy of the GNU General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, + * USA. + * + * + * Original Author: Arnaud Roques + * + * + */ +package net.sourceforge.plantuml.project; + +import java.util.Date; + +import net.sourceforge.plantuml.project.core.Month; +import net.sourceforge.plantuml.project.core.Wink; +import net.sourceforge.plantuml.project.lang.Complement; +import net.sourceforge.plantuml.project.lang.Subject; + +public class DayAsDate implements Complement, Comparable<DayAsDate>, Subject { + + private final int year; + private final int dayOfMonth; + private final Month month; + + public static DayAsDate create(int year, String month, int dayOfMonth) { + return new DayAsDate(year, Month.fromString(month), dayOfMonth); + } + + public static DayAsDate create(int year, int month, int dayOfMonth) { + return new DayAsDate(year, Month.values()[month - 1], dayOfMonth); + } + + public static DayAsDate today() { + final Date now = new Date(); + final int year = now.getYear() + 1900; + final int month = now.getMonth() + 1; + final int dayOfMonth = now.getDate(); + return create(year, month, dayOfMonth); + } + + private DayAsDate(int year, Month month, int dayOfMonth) { + this.year = year; + this.dayOfMonth = dayOfMonth; + this.month = month; + } + + public int getYear() { + return year; + } + + private int internalNumber() { + return year * 100 * 100 + month.ordinal() * 100 + dayOfMonth; + } + + @Override + public String toString() { + return "" + year + "/" + month + "/" + dayOfMonth; + } + + @Override + public int hashCode() { + return year * 113 + dayOfMonth * 17 + month.hashCode(); + } + + @Override + public boolean equals(Object obj) { + final DayAsDate other = (DayAsDate) obj; + return other.internalNumber() == this.internalNumber(); + } + + public final int getDayOfMonth() { + return dayOfMonth; + } + + private int daysPerMonth() { + return month.getDaysPerMonth(year); + } + + public DayAsDate next() { + int newDayOfMonth = dayOfMonth + 1; + if (newDayOfMonth <= daysPerMonth()) { + return new DayAsDate(year, month, newDayOfMonth); + } + assert newDayOfMonth > daysPerMonth(); + newDayOfMonth = 1; + final Month newMonth = month.next(); + final int newYear = newMonth == Month.JANUARY ? year + 1 : year; + return new DayAsDate(newYear, newMonth, newDayOfMonth); + } + + public Month getMonth() { + return month; + } + + // https://en.wikipedia.org/wiki/Zeller%27s_congruence + public DayOfWeek getDayOfWeek() { + final int q = dayOfMonth; + final int m = month.m(); + final int y = m >= 13 ? year - 1 : year; + final int k = y % 100; + final int j = y / 100; + final int h = ((q + 13 * (m + 1) / 5) + k + k / 4 + j / 4 + 5 * j) % 7; + return DayOfWeek.fromH(h); + } + + public Wink asInstantDay(DayAsDate reference) { + // if (this.compareTo(reference) < 0) { + // throw new IllegalArgumentException(); + // } + int cmp = 0; + DayAsDate current = reference; + while (current.compareTo(this) < 0) { + current = current.next(); + cmp++; + } + return new Wink(cmp); + } + + // http://www.proesite.com/timex/wkcalc.htm + public int ISO_WN() { + final int y = year; + int m = month.ordinal() + 1; + int d = dayOfMonth; + int dow = DOW(y, m, d); + int dow0101 = DOW(y, 1, 1); + + if (m == 1 && 3 < dow0101 && dow0101 < 7 - (d - 1)) { + // days before week 1 of the current year have the same week number as + // the last day of the last week of the previous year + + dow = dow0101 - 1; + dow0101 = DOW(y - 1, 1, 1); + m = 12; + d = 31; + } else if (m == 12 && 30 - (d - 1) < DOW(y + 1, 1, 1) && DOW(y + 1, 1, 1) < 4) { + // days after the last week of the current year have the same week number as + // the first day of the next year, (i.e. 1) + + return 1; + } + + return (DOW(y, 1, 1) < 4) ? 1 : 0 + 4 * (m - 1) + (2 * (m - 1) + (d - 1) + dow0101 - dow + 6) * 36 / 256; + + } + + private int DOW(int y, int m, int d) { + // TODO Auto-generated method stub + return 0; + } + + public int compareTo(DayAsDate other) { + return this.internalNumber() - other.internalNumber(); + } + +} |