Example usage for java.time.zone ZoneRules nextTransition

Introduction

In this page you can find the example usage for java.time.zone ZoneRules nextTransition.

Prototype

public ZoneOffsetTransition nextTransition(Instant instant) 

Source Link

Document

Gets the next transition after the specified instant.

Usage

From source file:org.nodatime.tzvalidate.Java8Dump.java

@Override
public ZoneTransitions getTransitions(String id, int fromYear, int toYear) {
    ZoneId zone = ZoneId.of(id);
    ZoneRules rules = zone.getRules();
    DateTimeFormatter nameFormat = DateTimeFormatter.ofPattern("zzz", Locale.US);
    ZoneTransitions transitions = new ZoneTransitions(id);

    Instant start = ZonedDateTime.of(fromYear, 1, 1, 0, 0, 0, 0, ZoneOffset.UTC).toInstant();
    transitions.addTransition(null, rules.getOffset(start).getTotalSeconds() * 1000,
            rules.isDaylightSavings(start), nameFormat.format(start.atZone(zone)));
    Instant end = ZonedDateTime.of(toYear, 1, 1, 0, 0, 0, 0, ZoneOffset.UTC).toInstant();

    ZoneOffsetTransition transition = rules.nextTransition(start.minusNanos(1));
    while (transition != null && transition.getInstant().isBefore(end)) {
        Instant instant = transition.getInstant();
        transitions.addTransition(new Date(instant.toEpochMilli()),
                rules.getOffset(instant).getTotalSeconds() * 1000, rules.isDaylightSavings(instant),
                nameFormat.format(instant.atZone(zone)));
        transition = rules.nextTransition(instant);
    }//from  w  w w .  j  a v a  2  s .  c  o m
    return transitions;
}

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