/**
* Create a ZonedChronology for any chronology, overriding any time zone it may already have.
*
* @param base base chronology to wrap
* @param zone the time zone
* @throws IllegalArgumentException if chronology or time zone is null
*/
public static ZonedChronology getInstance(Chronology base, DateTimeZone zone) {
if (base == null) {
throw new IllegalArgumentException("Must supply a chronology");
}
base = base.withUTC();
if (base == null) {
throw new IllegalArgumentException("UTC chronology must not be null");
}
if (zone == null) {
throw new IllegalArgumentException("DateTimeZone must not be null");
}
return new ZonedChronology(base, zone);
}
private void printTo(Appendable appendable, long instant, Chronology chrono) throws IOException {
InternalPrinter printer = requirePrinter();
chrono = selectChronology(chrono);
// Shift instant into local time (UTC) to avoid excessive offset
// calculations when printing multiple fields in a composite printer.
DateTimeZone zone = chrono.getZone();
int offset = zone.getOffset(instant);
long adjustedInstant = instant + offset;
if ((instant ^ adjustedInstant) < 0 && (instant ^ offset) >= 0) {
// Time zone offset overflow, so revert to UTC.
zone = DateTimeZone.UTC;
offset = 0;
adjustedInstant = instant;
}
printer.printTo(appendable, adjustedInstant, chrono.withUTC(), offset, zone, iLocale);
}