/*
* -----------------------------------------------------------------------
* Copyright © 2013-2015 Meno Hochschild, <http://www.menodata.de/>
* -----------------------------------------------------------------------
* This file (CalendarOperator.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 <http://www.gnu.org/licenses/>.
* -----------------------------------------------------------------------
*/
package net.time4j;
import net.time4j.base.GregorianMath;
import net.time4j.engine.ChronoOperator;
/**
* <p>Führt kombinierte Kalendermanipulationen aus. </p>
*
* @author Meno Hochschild
* @since 1.2
*/
final class CalendarOperator
extends ElementOperator<PlainDate> {
//~ Statische Felder/Initialisierungen --------------------------------
static final CalendarOperator FIRST_DAY_OF_NEXT_MONTH =
new CalendarOperator(ElementOperator.OP_FIRST_DAY_OF_NEXT_MONTH);
static final CalendarOperator FIRST_DAY_OF_NEXT_QUARTER =
new CalendarOperator(ElementOperator.OP_FIRST_DAY_OF_NEXT_QUARTER);
static final CalendarOperator FIRST_DAY_OF_NEXT_YEAR =
new CalendarOperator(ElementOperator.OP_FIRST_DAY_OF_NEXT_YEAR);
static final CalendarOperator LAST_DAY_OF_PREVIOUS_MONTH =
new CalendarOperator(ElementOperator.OP_LAST_DAY_OF_PREVIOUS_MONTH);
static final CalendarOperator LAST_DAY_OF_PREVIOUS_QUARTER =
new CalendarOperator(ElementOperator.OP_LAST_DAY_OF_PREVIOUS_QUARTER);
static final CalendarOperator LAST_DAY_OF_PREVIOUS_YEAR =
new CalendarOperator(ElementOperator.OP_LAST_DAY_OF_PREVIOUS_YEAR);
//~ Instanzvariablen --------------------------------------------------
private final ChronoOperator<PlainTimestamp> tsop;
//~ Konstruktoren -----------------------------------------------------
private CalendarOperator(int type) {
super(PlainDate.COMPONENT, type);
this.tsop =
entity -> {
PlainDate date = doApply(entity.getCalendarDate());
return entity.with(date);
};
}
//~ Methoden ----------------------------------------------------------
@Override
public PlainDate apply(PlainDate entity) {
return this.doApply(entity);
}
@Override
ChronoOperator<PlainTimestamp> onTimestamp() {
return this.tsop;
}
private PlainDate doApply(PlainDate date) {
int year = date.getYear();
int month = date.getMonth();
switch (this.getType()) {
case OP_FIRST_DAY_OF_NEXT_MONTH:
month++;
if (month >= 13) {
year++;
month = 1;
}
return PlainDate.of(year, month, 1);
case OP_FIRST_DAY_OF_NEXT_QUARTER:
Quarter q1 = Month.valueOf(month).getQuarterOfYear();
Quarter q2 = q1.next();
month = Month.atStartOfQuarterYear(q2).getValue();
if (q1 == Quarter.Q4) {
year++;
}
return PlainDate.of(year, month, 1);
case OP_FIRST_DAY_OF_NEXT_YEAR:
year++;
return PlainDate.of(year, 1, 1);
case OP_LAST_DAY_OF_PREVIOUS_MONTH:
month--;
if (month <= 0) {
year--;
month = 12;
}
return PlainDate.of(
year,
month,
GregorianMath.getLengthOfMonth(year, month));
case OP_LAST_DAY_OF_PREVIOUS_QUARTER:
Quarter p1 = Month.valueOf(month).getQuarterOfYear();
Quarter p2 = p1.previous();
month = Month.atEndOfQuarterYear(p2).getValue();
if (p2 == Quarter.Q4) {
year--;
return PlainDate.of(year, month, 31); // december
} else if (p2 == Quarter.Q1) {
return PlainDate.of(year, month, 31); // march
}
return PlainDate.of(year, month, 30); // june or september
case OP_LAST_DAY_OF_PREVIOUS_YEAR:
year--;
return PlainDate.of(year, 12, 31);
default:
throw new AssertionError("Unknown: " + this.getType());
}
}
}