Example usage for java.time.temporal TemporalQuery TemporalQuery

Introduction

In this page you can find the example usage for java.time.temporal TemporalQuery TemporalQuery.

Prototype

TemporalQuery

Source Link

Usage

From source file:Main.java

public static void main(String[] args) {
    TemporalQuery<Integer> daysBeforeChristmas = new TemporalQuery<Integer>() {

        public int daysTilChristmas(int acc, Temporal temporal) {
            int month = temporal.get(ChronoField.MONTH_OF_YEAR);
            int day = temporal.get(ChronoField.DAY_OF_MONTH);
            int max = temporal.with(TemporalAdjusters.lastDayOfMonth()).get(ChronoField.DAY_OF_MONTH);
            if (month == 12 && day <= 25)
                return acc + (25 - day);
            return daysTilChristmas(acc + (max - day + 1),
                    temporal.with(TemporalAdjusters.firstDayOfNextMonth()));
        }//from w w  w. j  a  va2s .c  o  m

        @Override
        public Integer queryFrom(TemporalAccessor temporal) {
            if (!(temporal instanceof Temporal))
                throw new RuntimeException("Temporal accessor must be of type Temporal");
            return daysTilChristmas(0, (Temporal) temporal);
        }
    };

    System.out.println(LocalDate.of(2013, 12, 26).query(daysBeforeChristmas)); // 364
    System.out.println(LocalDate.of(2013, 12, 23).query(daysBeforeChristmas)); // 2
    System.out.println(LocalDate.of(2013, 12, 25).query(daysBeforeChristmas)); // 0
    System.out.println(ZonedDateTime.of(2013, 12, 1, 11, 0, 13, 938282, ZoneId.of("America/Los_Angeles"))
            .query(daysBeforeChristmas)); // 24
}

---