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package com.squarespace.cldr.dates;
import java.time.DayOfWeek;
import java.time.Month;
import java.time.ZoneId;
import java.time.ZoneOffset;
import java.time.ZonedDateTime;
import java.time.temporal.ChronoField;
import java.time.temporal.IsoFields;
import java.time.zone.ZoneRules;
import java.time.zone.ZoneRulesException;
import java.util.Map;
import com.squarespace.cldr.CLDR;
import com.squarespace.cldr.dates.TimeZoneNames.Name;
/**
* Format date/time fields in a given calendar. Formatting rules are implemented according to CLDR:
* http://www.unicode.org/reports/tr35/tr35-dates.html#Date_Field_Symbol_Table
*/
public abstract class CalendarFormatterBase implements CalendarFormatter {
// TODO: complete, rename, etc
// TODO: field order-invariant lookup
// TODO: fuzzy skeleton matching (needed?)
// Locale-specific data populated through code generation of the subclasses.
protected CLDR.Locale bundleId;
protected int firstDay;
protected int minDays;
protected FieldVariants eras;
protected FieldVariants quartersFormat;
protected FieldVariants quartersStandalone;
protected FieldVariants monthsFormat;
protected FieldVariants monthsStandalone;
protected FieldVariants weekdaysFormat;
protected FieldVariants weekdaysStandalone;
protected FieldVariants dayPeriodsFormat;
protected FieldVariants dayPeriodsStandalone;
protected String gmtZeroFormat;
protected Map exemplarCities;
protected Map timezoneNames;
protected Map metazoneNames;
public CLDR.Locale bundleId() {
return bundleId;
}
/**
* Formats a date using a given pattern. See CLDR "dateFormats"
*/
protected abstract void formatDate(CalendarFormat type, ZonedDateTime d, StringBuilder b);
/**
* Formats a time using a given pattern. See CLDR "timeFormats"
*/
protected abstract void formatTime(CalendarFormat type, ZonedDateTime d, StringBuilder b);
/**
* Formats a date and time (either a named format or a skeleton) using a localized wrapper.
*/
protected abstract void formatWrapped(
CalendarFormat wrapperType, CalendarFormat dateType, CalendarFormat timeType,
String dateSkel, String timeSkel, ZonedDateTime d, StringBuilder b);
/**
* Formats using a skeleton pattern. See CLDR "dateTimeFormats / availableFormats".
*/
protected abstract boolean formatSkeleton(String skeleton, ZonedDateTime d, StringBuilder b);
/**
* Wraps the GMT hours and minutes, e.g. "GMT{0}" -> "GMT-04:00".
*/
protected abstract void wrapTimeZoneGMT(StringBuilder b, boolean negative, int hours, int mins, boolean _short);
/**
* Wraps a location in the region format, e.g. "{0} Time" -> "Los Angeles Time"
*/
protected abstract void wrapTimeZoneRegion(StringBuilder b, String region);
/**
* Format a date time interval using the given interval skeleton. Selects the best
* pattern to use for the given skeleton based on the field of greatest difference
* between the start and end date-time.
*/
protected abstract void formatInterval(
ZonedDateTime start, ZonedDateTime end,
String skeleton, DateTimeField field, StringBuilder buffer);
@Override
public String getWeekdayName(DayOfWeek dayOfWeek, FieldWidth width) {
if (dayOfWeek == null) {
dayOfWeek = DayOfWeek.SUNDAY;
}
if (width == null) {
width = FieldWidth.WIDE;
}
int weekday = dayOfWeek.getValue() % 7;
switch (width) {
case ABBREVIATED:
return weekdaysStandalone.abbreviated[weekday];
case NARROW:
return weekdaysStandalone.narrow[weekday];
case SHORT:
return weekdaysStandalone.short_[weekday];
case WIDE:
default:
return weekdaysStandalone.wide[weekday];
}
}
@Override
public String getMonthName(Month monthName, FieldWidth width) {
if (monthName == null) {
monthName = Month.JANUARY;
}
if (width == null) {
width = FieldWidth.WIDE;
}
int month = monthName.getValue() - 1;
switch (width) {
case ABBREVIATED:
case SHORT:
return monthsStandalone.abbreviated[month];
case NARROW:
return monthsStandalone.narrow[month];
case WIDE:
default:
return monthsStandalone.wide[month];
}
}
/**
* Main entry point for date time formatting.
*/
@Override
public void format(ZonedDateTime datetime, CalendarFormatOptions options, StringBuilder buffer) {
String dateSkeleton = options.dateSkeleton() == null ? null : options.dateSkeleton().skeleton();
String timeSkeleton = options.timeSkeleton() == null ? null : options.timeSkeleton().skeleton();
CalendarFormat wrapperFormat = options.wrapperFormat();
CalendarFormat dateFormat = options.dateFormat();
CalendarFormat timeFormat = options.timeFormat();
if (wrapperFormat != null) {
// If wrapper is set it implies we want to output both a date and a time. If either is unset
// we need to set it to the wrapper's format, unless a skeleton is defined.
dateFormat = dateFormat != null ? dateFormat : (dateSkeleton == null ? wrapperFormat : null);
timeFormat = timeFormat != null ? timeFormat : (timeSkeleton == null ? wrapperFormat : null);
} else {
// If wrapper is null, attempt to default it using the date's format or SHORT.
if ((dateFormat != null || dateSkeleton != null) && (timeFormat != null || timeSkeleton != null)) {
wrapperFormat = dateFormat != null ? dateFormat : CalendarFormat.SHORT;
}
}
if (wrapperFormat != null) {
formatWrapped(wrapperFormat, dateFormat, timeFormat, dateSkeleton, timeSkeleton, datetime, buffer);
} else if (options.dateFormat() != null) {
formatDate(options.dateFormat(), datetime, buffer);
} else if (options.timeFormat() != null) {
formatTime(options.timeFormat(), datetime, buffer);
} else {
String skeleton = dateSkeleton != null ? dateSkeleton : timeSkeleton;
// If every property is null, fall back to this default "yMd"
if (skeleton == null) {
skeleton = CalendarSkeleton.yMd.skeleton();
}
formatSkeleton(skeleton, datetime, buffer);
}
}
/**
* Format a date time interval, guessing at the best skeleton to use based on the field
* of greatest difference between the start and end date-time. If the end date-time has
* a different time zone than the start, this is corrected for comparison. If the
* skeleton is null, one is selected automatically using the field of greatest difference.
*
* Greatest difference is calculated by comparing fields in the following order:
*
* year, month, date, day-of-week, am-pm, hour, hour-of-day, minute, and second
*/
@Override
public void format(
ZonedDateTime start, ZonedDateTime end, DateTimeIntervalSkeleton skeleton, StringBuilder buffer) {
DateTimeField field = CalendarFormattingUtils.greatestDifference(start, end);
if (skeleton == null) {
switch (field) {
case YEAR:
case MONTH:
case DAY:
skeleton = DateTimeIntervalSkeleton.yMMMd;
break;
default:
skeleton = DateTimeIntervalSkeleton.hmv;
break;
}
}
formatInterval(start, end, skeleton.skeleton(), field, buffer);
}
/**
* Retrieves the exemplar city for a timezone, e.g. "America/Los_Angeles" -> "Los Angeles".
*/
public String getExemplarCity(String zoneId) {
return exemplarCities.get(zoneId);
}
public String resolveTimeZoneId(String zoneId) {
String alias = _CalendarUtils.getTimeZoneAlias(zoneId);
if (alias != null) {
zoneId = alias;
}
alias = TimeZoneAliases.getAlias(zoneId);
if (alias != null) {
zoneId = alias;
}
return zoneId;
}
/**
* Lookup the time zone name variants (long or short) for the given zoneId and datetime.
*/
public Name getTimeZoneName(String zoneId, ZonedDateTime date, boolean long_) {
TimeZoneNames names = timezoneNames.get(zoneId);
if (names != null) {
return long_ ? names.longName() : names.shortName();
}
zoneId = _CalendarUtils.getMetazone(zoneId, date);
if (zoneId == null) {
return null;
}
names = metazoneNames.get(zoneId);
if (names != null) {
return long_ ? names.longName() : names.shortName();
}
return null;
}
/**
* Formats a single field, based on the first character in the pattern string,
* with repeated characters indicating the field width.
*/
public void formatField(ZonedDateTime datetime, String pattern, StringBuilder buffer) {
int length = pattern.length();
if (length == 0) {
return;
}
// Current position in pattern
int i = 0;
// Skip over prefix indicating we want to format a single field.
if (pattern.charAt(i) == '+') {
if (length == 1) {
return;
}
i++;
}
int width = 0;
char field = pattern.charAt(i);
while (i < length) {
if (pattern.charAt(i) != field) {
break;
}
width++;
i++;
}
formatField(datetime, field, width, buffer);
}
/**
* Format a single field of a given width.
*/
public void formatField(ZonedDateTime datetime, char field, int width, StringBuilder buffer) {
switch (field) {
case 'G':
formatEra(buffer, datetime, width, eras);
break;
case 'y':
formatYear(buffer, datetime, width);
break;
case 'Y':
formatISOYearWeekOfYear(buffer, datetime, width);
break;
case 'u':
case 'U':
case 'r':
// Only used for non-Gregorian calendars
break;
case 'Q':
formatQuarter(buffer, datetime, width, quartersFormat);
break;
case 'q':
formatQuarter(buffer, datetime, width, quartersStandalone);
break;
case 'M':
formatMonth(buffer, datetime, width, monthsFormat);
break;
case 'L':
formatMonth(buffer, datetime, width, monthsStandalone);
break;
case 'l':
// deprecated, ignore
break;
case 'w':
formatISOWeekOfYear(buffer, datetime, width);
break;
case 'W':
formatWeekOfMonth(buffer, datetime, width);
break;
case 'd':
formatDayOfMonth(buffer, datetime, width);
break;
case 'D':
formatDayOfYear(buffer, datetime, width);
break;
case 'F':
formatDayOfWeekInMonth(buffer, datetime, width);
break;
case 'g':
// modified julian day
break;
case 'E':
formatWeekday(buffer, datetime, width, weekdaysFormat);
break;
case 'e':
formatLocalWeekday(buffer, datetime, width, weekdaysFormat, firstDay);
break;
case 'c':
formatLocalWeekdayStandalone(buffer, datetime, width, weekdaysStandalone, firstDay);
break;
case 'a':
formatDayPeriod(buffer, datetime, width, dayPeriodsFormat);
break;
case 'b':
// Not yet in use.
// TODO: day periods: am, pm, noon, midnight
break;
case 'B':
// Not yet in use.
// TODO: flexible day periods: "at night"
break;
case 'h':
formatHours(buffer, datetime, width, true);
break;
case 'H':
formatHours(buffer, datetime, width, false);
break;
case 'K':
formatHoursAlt(buffer, datetime, width, true);
break;
case 'k':
formatHoursAlt(buffer, datetime, width, false);
break;
case 'j':
case 'J':
case 'C':
// Input skeleton symbols, not implemented.
break;
case 'm':
formatMinutes(buffer, datetime, width);
break;
case 's':
formatSeconds(buffer, datetime, width);
break;
case 'S':
formatFractionalSeconds(buffer, datetime, width);
break;
case 'A':
// not implemented
break;
case 'z':
formatTimeZone_z(buffer, datetime, width);
break;
case 'Z':
formatTimeZone_Z(buffer, datetime, width);
break;
case 'O':
formatTimeZone_O(buffer, datetime, width);
break;
case 'v':
formatTimeZone_v(buffer, datetime, width);
break;
case 'V':
formatTimeZone_V(buffer, datetime, width);
break;
case 'X':
case 'x':
formatTimeZone_X(buffer, datetime, width, field);
break;
}
}
/**
* Format the era based on the year.
*/
void formatEra(StringBuilder b, ZonedDateTime d, int width, FieldVariants eras) {
int year = d.getYear();
int index = year < 0 ? 0 : 1;
switch (width) {
case 5:
b.append(eras.narrow[index]);
break;
case 4:
b.append(eras.wide[index]);
break;
case 3:
case 2:
case 1:
b.append(eras.abbreviated[index]);
break;
}
}
/**
* Format the numeric year, zero padding as necessary.
*/
void formatYear(StringBuilder b, ZonedDateTime d, int width) {
int year = d.getYear();
_formatYearValue(b, year, width);
}
/**
* Formats the year according to ISO week-year.
*/
void formatISOYearWeekOfYear(StringBuilder b, ZonedDateTime d, int width) {
int year = d.get(IsoFields.WEEK_BASED_YEAR);
_formatYearValue(b, year, width);
}
void _formatYearValue(StringBuilder b, int year, int width) {
if (width == 2) {
year %= 100;
}
// Note: revisit this code in year 99,999.
int digits = year >= 10000 ? 5 : year >= 1000 ? 4 : year >= 100 ? 3 : year >= 10 ? 2 : 1;
// Pad leading '0' digits
if (width > 1) {
int zeroes = width - digits;
for (int i = 0; i < zeroes; i++) {
b.append('0');
}
}
b.append(year);
}
/**
* Format the quarter based on the month.
*/
void formatQuarter(StringBuilder b, ZonedDateTime d, int width, FieldVariants quarters) {
int quarter = (d.getMonth().getValue() - 1) / 3;
switch (width) {
case 5:
b.append(quarters.narrow[quarter]);
break;
case 4:
b.append(quarters.wide[quarter]);
break;
case 3:
b.append(quarters.abbreviated[quarter]);
break;
case 2:
b.append('0');
// fall through
case 1:
b.append(quarter + 1);
break;
}
}
/**
* Format the month, numeric or a string name variant.
*/
void formatMonth(StringBuilder b, ZonedDateTime d, int width, FieldVariants months) {
int month = d.getMonth().getValue();
switch (width) {
case 5:
b.append(months.narrow[month-1]);
break;
case 4:
b.append(months.wide[month-1]);
break;
case 3:
b.append(months.abbreviated[month-1]);
break;
case 2:
if (month < 10) {
b.append('0');
}
// fall through
case 1:
b.append(month);
break;
}
}
/**
* Format the week number of the month.
*/
void formatWeekOfMonth(StringBuilder b, ZonedDateTime d, int width) {
int w = d.get(ChronoField.ALIGNED_WEEK_OF_MONTH);
if (width == 1) {
b.append(w);
}
}
/**
* Format the week number of the year.
*/
void formatISOWeekOfYear(StringBuilder b, ZonedDateTime d, int width) {
int w = d.get(IsoFields.WEEK_OF_WEEK_BASED_YEAR);
switch (width) {
case 2:
zeroPad2(b, w, 2);
break;
case 1:
b.append(w);
break;
}
}
/**
* Format the weekday name.
*/
void formatWeekday(StringBuilder b, ZonedDateTime d, int width, FieldVariants weekdays) {
int weekday = d.getDayOfWeek().getValue() % 7;
switch (width) {
case 6:
b.append(weekdays.short_[weekday]);
break;
case 5:
b.append(weekdays.narrow[weekday]);
break;
case 4:
b.append(weekdays.wide[weekday]);
break;
case 3:
case 2:
case 1:
b.append(weekdays.abbreviated[weekday]);
break;
}
}
/**
* Format the numeric weekday, or the format name variant.
*/
void formatLocalWeekday(StringBuilder b, ZonedDateTime d, int width, FieldVariants weekdays, int firstDay) {
if (width > 2) {
formatWeekday(b, d, width, weekdays);
return;
}
if (width == 2) {
b.append('0');
}
formatWeekdayNumeric(b, d, firstDay);
}
/**
* Format the numeric weekday, or the stand-alone name variant.
*/
void formatLocalWeekdayStandalone(StringBuilder b, ZonedDateTime d, int width, FieldVariants weekdays, int firstDay) {
if (width > 2) {
formatWeekday(b, d, width, weekdays);
return;
}
formatWeekdayNumeric(b, d, firstDay);
}
/**
* Convert from Java's ISO-8601 week number, where Monday = 1 and Sunday = 7.
* We need to adjust this according to the locale's "first day of the week" which
* in the US is Sunday = 0.
*
* In the US, Tuesday will produce '3' or the 3rd day of the week:
*
* weekday = 2 (ISO-8601 Tuesday == 2)
* int w = (7 - 0 + weekday) % 7 + 1
* w == 3
*
* In the US, Saturday will produce '7', ending the week:
*
* weekday = 6 (ISO-8601 Saturday == 6)
* int w = (7 - 0 + weekday) % 7 + 1
* w == 7
*
*/
private void formatWeekdayNumeric(StringBuilder b, ZonedDateTime d, int firstDay) {
// Java returns ISO-8601 where Monday = 1 and Sunday = 7.
int weekday = d.getDayOfWeek().getValue();
// Adjust to the localized "first day of the week"
int w = (7 - firstDay + weekday) % 7 + 1;
b.append(w);
}
/**
* Format the day of the month, optionally zero-padded.
*/
void formatDayOfMonth(StringBuilder b, ZonedDateTime d, int width) {
int day = d.getDayOfMonth();
zeroPad2(b, day, width);
}
/**
* Format the 3-digit day of the year, zero padded.
*/
void formatDayOfYear(StringBuilder b, ZonedDateTime d, int width) {
int day = d.getDayOfYear();
int digits = day < 10 ? 1 : day < 100 ? 2 : 3;
switch (digits) {
case 1:
if (width > 1) {
b.append('0');
}
// fall through
case 2:
if (width > 2) {
b.append('0');
}
// fall through
case 3:
b.append(day);
break;
}
}
/**
* Numeric day of week in month, as in "2nd Wednesday in July".
*/
void formatDayOfWeekInMonth(StringBuilder b, ZonedDateTime d, int width) {
int day = ((d.getDayOfMonth() - 1) / 7) + 1;
b.append(day);
}
/**
* Format the day period variant.
*/
void formatDayPeriod(StringBuilder b, ZonedDateTime d, int width, FieldVariants dayPeriods) {
int hours = d.getHour();
int index = hours < 12 ? 0 : 1;
switch (width) {
case 5:
b.append(dayPeriods.narrow[index]);
break;
case 4:
b.append(dayPeriods.wide[index]);
break;
case 3:
case 2:
case 1:
b.append(dayPeriods.abbreviated[index]);
break;
}
}
/**
* Format the hours in 12- or 24-hour format, optionally zero-padded.
*/
void formatHours(StringBuilder b, ZonedDateTime d, int width, boolean twelveHour) {
int hours = d.getHour();
if (twelveHour && hours > 12) {
hours = hours - 12;
}
if (twelveHour && hours == 0) {
hours = 12;
}
zeroPad2(b, hours, width);
}
/**
* Format hours in 0-11 and 1-24 format, optionally zero-padded.
*/
void formatHoursAlt(StringBuilder b, ZonedDateTime d, int width, boolean twelveHour) {
int hours = d.getHour();
if (twelveHour) {
if (hours >= 12) {
hours = hours - 12;
}
} else {
hours++;
}
zeroPad2(b, hours, width);
}
/**
* Format the minutes, optionally zero-padded.
*/
void formatMinutes(StringBuilder b, ZonedDateTime d, int width) {
zeroPad2(b, d.getMinute(), width);
}
/**
* Format the seconds, optionally zero-padded.
*/
void formatSeconds(StringBuilder b, ZonedDateTime d, int width) {
zeroPad2(b, d.getSecond(), width);
}
/**
* Format fractional seconds up to N digits.
*/
void formatFractionalSeconds(StringBuilder b, ZonedDateTime d, int width) {
// format up to 9 digits at nanosecond resolution.
int nano = d.getNano();
int f = 100000000;
while (width > 0 && f > 0) {
int digit = nano / f;
nano -= (digit * f);
f /= 10;
b.append(digit);
width--;
}
// fill out any trailing zeros if any are requested
while (width > 0) {
b.append('0');
width--;
}
}
/**
* Format timezone in localized GMT format for field 'O'.
*/
void formatTimeZone_O(StringBuilder b, ZonedDateTime d, int width) {
int[] tz = getTzComponents(d);
switch (width) {
case 1:
wrapTimeZoneGMT(b, tz[TZNEG] == -1, tz[TZHOURS], tz[TZMINS], true);
break;
case 4:
wrapTimeZoneGMT(b, tz[TZNEG] == -1, tz[TZHOURS], tz[TZMINS], false);
break;
}
}
/**
* Timezone as short / long generic non-location format.
*/
void formatTimeZone_v(StringBuilder b, ZonedDateTime d, int width) {
if (width != 1 && width != 4) {
return;
}
ZoneId zone = d.getZone();
Name variants = getTimeZoneName(zone.getId(), d, width == 4);
String name = variants == null ? null : variants.generic();
if (name != null) {
b.append(name);
} else {
// Falls back to 'O' or 'OOOO'.
formatTimeZone_O(b, d, width);
}
}
/**
* Timezone as short / long ids and exemplar city.
*/
void formatTimeZone_V(StringBuilder b, ZonedDateTime d, int width) {
switch (width) {
case 4:
{
// "VVVV" - Generic location format, e.g. "Los Angeles Time".
String zoneId = d.getZone().getId();
String region = getExemplarCity(zoneId);
if (region != null) {
wrapTimeZoneRegion(b, region);
}
break;
}
case 3:
{
// "VVV" - Exemplar city (location) for the time zone, e.g. "Los Angeles"
String zoneId = d.getZone().getId();
String city = getExemplarCity(zoneId);
if (city != null) {
b.append(city);
}
break;
}
case 2:
// "VV" - Long time zone ID, e.g. "America/Los_Angeles"
String zoneId = d.getZone().getId();
zoneId = resolveTimeZoneId(zoneId);
if (zoneId != null) {
b.append(zoneId);
}
break;
case 1:
// "V" - Short time zone ID, e.g. "uslax".
// Not available in the JSON CLDR data, so appending "unk".
b.append("unk");
break;
}
}
/**
* Format timezone in ISO8601 basic or extended format for field 'x' or 'X'.
* http://www.unicode.org/reports/tr35/tr35-dates.html#dfst-zone
*/
void formatTimeZone_X(StringBuilder b, ZonedDateTime d, int width, char ch) {
int[] tz = getTzComponents(d);
// Emit a 'Z' by itself for X if time is exactly GMT
if (ch == 'X' && tz[TZOFFSET] == 0) {
b.append('Z');
return;
}
switch (width) {
case 5:
case 4:
case 3:
case 2:
case 1:
if (tz[TZNEG] == -1) {
b.append('-');
} else {
b.append('+');
}
zeroPad2(b, tz[TZHOURS], 2);
// Delimiter is omitted for X, XX and XXXX
if (width == 3 || width == 5) {
b.append(':');
}
int mins = tz[TZMINS];
// Minutes are optional for X
if (width != 1 || mins > 0) {
zeroPad2(b, mins, 2);
}
break;
}
}
/**
* Format a time zone using a non-location format.
*/
void formatTimeZone_z(StringBuilder b, ZonedDateTime d, int width) {
if (width > 4) {
return;
}
ZoneId zone = d.getZone();
ZoneRules zoneRules = null;
try {
zoneRules = zone.getRules();
} catch (ZoneRulesException e) {
// not expected, but catching for safety
return;
}
boolean daylight = zoneRules.isDaylightSavings(d.toInstant());
// Select long or short name variants and select the standard or daylight name.
Name variants = getTimeZoneName(zone.getId(), d, width == 4);
String name = variants == null ? null : (daylight ? variants.daylight() : variants.standard());
switch (width) {
case 4:
{
if (name != null) {
b.append(name);
} else {
// Falls back to 'OOOO'
formatTimeZone_O(b, d, 4);
}
break;
}
case 3:
case 2:
case 1:
{
if (name != null) {
b.append(name);
} else {
// Falls back to 'O'
formatTimeZone_O(b, d, 1);
}
break;
}
}
}
/**
* Format time zone in ISO8601 basic or extended format for field 'Z'.
* http://www.unicode.org/reports/tr35/tr35-dates.html#dfst-zone
*/
void formatTimeZone_Z(StringBuilder b, ZonedDateTime d, int width) {
if (width == 4) {
// ZZZZ is same as OOOO
formatTimeZone_O(b, d, width);
return;
}
int[] tz = getTzComponents(d);
if (width == 5 && tz[TZOFFSET] == 0) {
b.append('Z');
return;
}
switch (width) {
case 5:
case 3:
case 2:
case 1:
if (tz[TZNEG] == -1) {
b.append('-');
} else {
b.append('+');
}
zeroPad2(b, tz[TZHOURS], 2);
// Delimiter omitted for all except XXXXX
if (width == 5) {
b.append(':');
}
zeroPad2(b, tz[TZMINS], 2);
break;
}
}
/** Indicates time zone offset is negative if == -1 */
private static final int TZNEG = 0;
/** Absolute value of the original offset in seconds */
private static final int TZOFFSET = 1;
/** Absolute value of the hours */
private static final int TZHOURS = 2;
/** Absolute value of the minutes */
private static final int TZMINS = 3;
/**
* Decode some fields about a time zone.
*/
private int[] getTzComponents(ZonedDateTime d) {
ZoneOffset offset = d.getOffset();
int secs = offset.getTotalSeconds();
boolean negative = secs < 0;
if (negative) {
secs = -secs;
}
int hours = secs / 3600;
int mins = (secs % 3600) / 60;
return new int[] { negative ? -1 : 1, secs, hours, mins };
}
/**
* Format 2-digit number with 0-padding.
*/
void zeroPad2(StringBuilder b, int value, int width) {
switch (width) {
case 2:
if (value < 10) {
b.append('0');
}
// fall through
case 1:
b.append(value);
break;
}
}
}
