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package io.polaris.core.time;
import java.util.Calendar;
import java.util.Date;
import java.util.TimeZone;
import javax.annotation.Nonnull;
/**
* @author Qt
* @since May 30, 2024
*/
public class Calendars implements DateConsts {
public static String format(String format, Calendar calendar) {
return Dates.format(format, calendar.getTime());
}
public static String formatDefault(Calendar calendar) {
return Dates.formatDefault(calendar.getTime());
}
public static Calendar parse(@Nonnull String format, @Nonnull String calendar) {
return toCalendar(Dates.parseDate(format, calendar));
}
public static Calendar parse(@Nonnull String val) {
return toCalendar(Dates.parseDate(val));
}
public static Calendar toCalendar(@Nonnull Date date) {
final Calendar c = Calendar.getInstance();
c.setTime(date);
return c;
}
public static Calendar toCalendar(@Nonnull Date date, final TimeZone tz) {
final Calendar c = Calendar.getInstance(tz);
c.setTime(date);
return c;
}
public static boolean isSameDay(@Nonnull Calendar cal1, @Nonnull Calendar cal2) {
return cal1.get(Calendar.ERA) == cal2.get(Calendar.ERA) &&
cal1.get(Calendar.YEAR) == cal2.get(Calendar.YEAR) &&
cal1.get(Calendar.DAY_OF_YEAR) == cal2.get(Calendar.DAY_OF_YEAR);
}
public static boolean isSameDay(@Nonnull Date date1, @Nonnull Date date2) {
return isSameDay(toCalendar(date1), toCalendar(date2));
}
public static boolean isSameInstant(@Nonnull Date date1, @Nonnull Date date2) {
return date1.getTime() == date2.getTime();
}
public static boolean isSameInstant(@Nonnull Calendar cal1, @Nonnull Calendar cal2) {
return cal1.getTime().getTime() == cal2.getTime().getTime();
}
public static Calendar ceil(final Calendar cal, final int field) {
return upOrDown(cal, field, 1);
}
public static Calendar floor(final Calendar cal, final int field) {
return upOrDown(cal, field, -1);
}
public static Calendar round(final Calendar cal, final int field) {
return upOrDown(cal, field, 0);
}
private static Calendar upOrDown(final Calendar cal, final int field, int upOrDown) {
boolean trim = false;
boolean withHourOfDay = false;
switch (field) {
case Calendar.YEAR: {
if (upOrDown == 0) {
setRoundVal(cal, Calendar.YEAR, Calendar.ERA);
} else if (upOrDown > 0) {
setCeilVal(cal, new int[]{Calendar.YEAR, Calendar.MONTH, Calendar.DAY_OF_MONTH, Calendar.HOUR_OF_DAY, Calendar.MINUTE, Calendar.SECOND, Calendar.MILLISECOND}, Calendar.ERA);
} else {
floorFieldVal(cal, Calendar.YEAR);
}
trim = true;
}
case Calendar.MONTH: {
if (trim) {
cal.set(Calendar.MONTH, cal.getActualMinimum(Calendar.MONTH));
} else {
if (upOrDown == 0) {
setRoundVal(cal, Calendar.MONTH, Calendar.YEAR);
} else if (upOrDown > 0) {
setCeilVal(cal, new int[]{Calendar.MONTH, Calendar.DAY_OF_MONTH, Calendar.HOUR_OF_DAY, Calendar.MINUTE, Calendar.SECOND, Calendar.MILLISECOND}, Calendar.YEAR);
} else {
floorFieldVal(cal, Calendar.MONTH);
}
trim = true;
}
}
case Calendar.DAY_OF_MONTH: {
if (trim) {
cal.set(Calendar.DAY_OF_MONTH, cal.getActualMinimum(Calendar.DAY_OF_MONTH));
} else {
if (upOrDown == 0) {
setRoundVal(cal, Calendar.DAY_OF_MONTH, Calendar.MONTH);
} else if (upOrDown > 0) {
setCeilVal(cal, new int[]{Calendar.DAY_OF_MONTH, Calendar.HOUR_OF_DAY, Calendar.MINUTE, Calendar.SECOND, Calendar.MILLISECOND}, Calendar.MONTH);
} else {
floorFieldVal(cal, Calendar.DAY_OF_MONTH);
}
trim = true;
}
}
case Calendar.HOUR_OF_DAY: {
if (trim) {
cal.set(Calendar.HOUR_OF_DAY, cal.getActualMinimum(Calendar.HOUR_OF_DAY));
} else {
if (upOrDown == 0) {
setRoundVal(cal, Calendar.HOUR_OF_DAY, Calendar.DAY_OF_MONTH);
} else if (upOrDown > 0) {
setCeilVal(cal, new int[]{Calendar.HOUR_OF_DAY, Calendar.MINUTE, Calendar.SECOND, Calendar.MILLISECOND}, Calendar.DAY_OF_MONTH);
} else {
floorFieldVal(cal, Calendar.HOUR_OF_DAY);
}
trim = true;
}
withHourOfDay = true;
}
case Calendar.HOUR: {
if (!withHourOfDay) {
if (upOrDown == 0) {
setRoundVal(cal, Calendar.HOUR, Calendar.AM_PM);
} else if (upOrDown > 0) {
setCeilVal(cal, new int[]{Calendar.HOUR, Calendar.MINUTE, Calendar.SECOND, Calendar.MILLISECOND}, Calendar.AM_PM);
} else {
floorFieldVal(cal, Calendar.HOUR);
}
trim = true;
}
}
case Calendar.MINUTE: {
if (trim) {
cal.set(Calendar.MINUTE, cal.getActualMinimum(Calendar.MINUTE));
} else {
if (upOrDown == 0) {
setRoundVal(cal, Calendar.MINUTE, Calendar.HOUR_OF_DAY);
} else if (upOrDown > 0) {
setCeilVal(cal, new int[]{Calendar.MINUTE, Calendar.SECOND, Calendar.MILLISECOND}, Calendar.HOUR_OF_DAY);
} else {
floorFieldVal(cal, Calendar.MINUTE);
}
trim = true;
}
}
case Calendar.SECOND: {
if (trim) {
cal.set(Calendar.SECOND, cal.getActualMinimum(Calendar.SECOND));
} else {
if (upOrDown == 0) {
setRoundVal(cal, Calendar.SECOND, Calendar.MINUTE);
} else if (upOrDown > 0) {
setCeilVal(cal, new int[]{Calendar.SECOND, Calendar.MILLISECOND}, Calendar.MINUTE);
} else {
floorFieldVal(cal, Calendar.SECOND);
}
trim = true;
}
}
case Calendar.MILLISECOND: {
if (trim) {
cal.set(Calendar.MILLISECOND, cal.getActualMinimum(Calendar.MILLISECOND));
} else {
if (upOrDown == 0) {
setRoundVal(cal, Calendar.MILLISECOND, Calendar.SECOND);
} else if (upOrDown > 0) {
setCeilVal(cal, new int[]{Calendar.MILLISECOND}, Calendar.SECOND);
} else {
floorFieldVal(cal, Calendar.MILLISECOND);
}
trim = true;
}
}
}
return cal;
}
private static void setCeilVal(@Nonnull Calendar cal, int[] fields, int upField) {
for (int field : fields) {
int v = cal.get(field);
int min = cal.getActualMinimum(field);
if (v > min) {
cal.set(field, min);
if (upField > 0) {
cal.add(upField, 1);
}
return;
}
}
}
private static void floorFieldVal(@Nonnull Calendar cal, int field) {
int v = cal.get(field);
int min = cal.getActualMinimum(field);
if (v > min) {
cal.set(field, min);
}
}
private static void setRoundVal(@Nonnull Calendar cal, int field, int upField) {
int v = cal.get(field);
int min = cal.getActualMinimum(field);
int max = cal.getActualMaximum(field);
if (v - min >= max - v) {
cal.set(field, min);
if (upField > 0) {
cal.add(upField, 1);
}
} else {
cal.set(field, min);
}
}
public static Date addYears(@Nonnull Date date, final int amount) {
return add(date, Calendar.YEAR, amount);
}
public static Date addMonths(@Nonnull Date date, final int amount) {
return add(date, Calendar.MONTH, amount);
}
public static Date addWeeks(@Nonnull Date date, final int amount) {
return add(date, Calendar.WEEK_OF_YEAR, amount);
}
public static Date addDays(@Nonnull Date date, final int amount) {
return add(date, Calendar.DAY_OF_MONTH, amount);
}
public static Date addHours(@Nonnull Date date, final int amount) {
return add(date, Calendar.HOUR_OF_DAY, amount);
}
public static Date addMinutes(@Nonnull Date date, final int amount) {
return add(date, Calendar.MINUTE, amount);
}
public static Date addSeconds(@Nonnull Date date, final int amount) {
return add(date, Calendar.SECOND, amount);
}
public static Date addMilliseconds(@Nonnull Date date, final int amount) {
return add(date, Calendar.MILLISECOND, amount);
}
public static Date add(@Nonnull Date date, int calendarField, final int amount) {
return add(toCalendar(date), calendarField, amount).getTime();
}
public static Calendar addYears(@Nonnull Calendar calendar, final int amount) {
return add(calendar, Calendar.YEAR, amount);
}
public static Calendar addMonths(@Nonnull Calendar calendar, final int amount) {
return add(calendar, Calendar.MONTH, amount);
}
public static Calendar addWeeks(@Nonnull Calendar calendar, final int amount) {
return add(calendar, Calendar.WEEK_OF_YEAR, amount);
}
public static Calendar addDays(@Nonnull Calendar calendar, final int amount) {
return add(calendar, Calendar.DAY_OF_MONTH, amount);
}
public static Calendar addHours(@Nonnull Calendar calendar, final int amount) {
return add(calendar, Calendar.HOUR_OF_DAY, amount);
}
public static Calendar addMinutes(@Nonnull Calendar calendar, final int amount) {
return add(calendar, Calendar.MINUTE, amount);
}
public static Calendar addSeconds(@Nonnull Calendar calendar, final int amount) {
return add(calendar, Calendar.SECOND, amount);
}
public static Calendar addMilliseconds(@Nonnull Calendar calendar, final int amount) {
return add(calendar, Calendar.MILLISECOND, amount);
}
public static Calendar add(@Nonnull Calendar calendar, int calendarField, final int amount) {
calendar.add(calendarField, amount);
return calendar;
}
public static Date setYear(@Nonnull Date date, final int amount) {
return set(date, Calendar.YEAR, amount);
}
public static Date setMonth(@Nonnull Date date, final int amount) {
return set(date, Calendar.MONTH, amount);
}
public static Date setDay(@Nonnull Date date, final int amount) {
return set(date, Calendar.DAY_OF_MONTH, amount);
}
public static Date setHour(@Nonnull Date date, final int amount) {
return set(date, Calendar.HOUR_OF_DAY, amount);
}
public static Date setMinute(@Nonnull Date date, final int amount) {
return set(date, Calendar.MINUTE, amount);
}
public static Date setSecond(@Nonnull Date date, final int amount) {
return set(date, Calendar.SECOND, amount);
}
public static Date setMillisecond(@Nonnull Date date, final int amount) {
return set(date, Calendar.MILLISECOND, amount);
}
private static Date set(@Nonnull Date date, int calendarField, final int amount) {
return set(toCalendar(date), calendarField, amount).getTime();
}
public static Calendar setYear(@Nonnull Calendar calendar, final int amount) {
return set(calendar, Calendar.YEAR, amount);
}
public static Calendar setMonth(@Nonnull Calendar calendar, final int amount) {
return set(calendar, Calendar.MONTH, amount);
}
public static Calendar setDay(@Nonnull Calendar calendar, final int amount) {
return set(calendar, Calendar.DAY_OF_MONTH, amount);
}
public static Calendar setHour(@Nonnull Calendar calendar, final int amount) {
return set(calendar, Calendar.HOUR_OF_DAY, amount);
}
public static Calendar setMinute(@Nonnull Calendar calendar, final int amount) {
return set(calendar, Calendar.MINUTE, amount);
}
public static Calendar setSecond(@Nonnull Calendar calendar, final int amount) {
return set(calendar, Calendar.SECOND, amount);
}
public static Calendar setMillisecond(@Nonnull Calendar calendar, final int amount) {
return set(calendar, Calendar.MILLISECOND, amount);
}
public static Calendar set(@Nonnull Calendar calendar, int calendarField, final int amount) {
calendar.set(calendarField, amount);
return calendar;
}
public static int getYear(@Nonnull Date date) {
return toCalendar(date).get(Calendar.YEAR);
}
public static int getMonth(@Nonnull Date date) {
return toCalendar(date).get(Calendar.MONTH);
}
public static int getDay(@Nonnull Date date) {
return toCalendar(date).get(Calendar.DAY_OF_MONTH);
}
public static int getHour(@Nonnull Date date) {
return toCalendar(date).get(Calendar.HOUR_OF_DAY);
}
public static int getMinute(@Nonnull Date date) {
return toCalendar(date).get(Calendar.MINUTE);
}
public static int getSecond(@Nonnull Date date) {
return toCalendar(date).get(Calendar.SECOND);
}
public static int getMillisecond(@Nonnull Date date) {
return toCalendar(date).get(Calendar.MILLISECOND);
}
public static int get(@Nonnull Date date, int calendarField) {
return get(toCalendar(date), calendarField);
}
public static int getYear(@Nonnull Calendar calendar) {
return calendar.get(Calendar.YEAR);
}
public static int getMonth(@Nonnull Calendar calendar) {
return calendar.get(Calendar.MONTH);
}
public static int getDay(@Nonnull Calendar calendar) {
return calendar.get(Calendar.DAY_OF_MONTH);
}
public static int getHour(@Nonnull Calendar calendar) {
return calendar.get(Calendar.HOUR_OF_DAY);
}
public static int getMinute(@Nonnull Calendar calendar) {
return calendar.get(Calendar.MINUTE);
}
public static int getSecond(@Nonnull Calendar calendar) {
return calendar.get(Calendar.SECOND);
}
public static int getMillisecond(@Nonnull Calendar calendar) {
return calendar.get(Calendar.MILLISECOND);
}
public static int get(@Nonnull Calendar calendar, int calendarField) {
return calendar.get(calendarField);
}
}
