Java Instant Calculate plus(Instant instant, Duration add)

Description

plus

License

Open Source License

Declaration

public static Instant plus(Instant instant, Duration add) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.time.Duration;
import java.time.Instant;

import java.time.temporal.ChronoUnit;

import java.util.Date;

public class Main {
    public static final Duration INF_POSITIVE = ChronoUnit.FOREVER.getDuration();
    public static final Duration INF_NEGATIVE = INF_POSITIVE.negated();
    public static final Instant INF_FUTURE = Instant.MAX;
    public static final Instant INF_PAST = Instant.MIN;

    public static Instant plus(Instant instant, Duration add) {
        if (isInfFuture(instant)) {
            return INF_FUTURE;
        } else if (isInfPast(instant)) {
            return INF_PAST;
        } else if (isInfPositive(add)) {
            return INF_FUTURE;
        } else if (isInfNegative(add)) {
            return INF_PAST;
        } else {/*  w ww  . jav a2s. c o  m*/
            return instant.plus(add);
        }
    }

    public static boolean isInfFuture(Instant instant) {
        return INF_FUTURE.equals(instant);
    }

    public static boolean isInfFuture(Date date) {
        return date.getYear() > 8000; // Hacky, but needs to match Ruby's Time::INF_FUTURE
    }

    public static boolean isInfPast(Instant instant) {
        return INF_PAST.equals(instant);
    }

    public static boolean isInfPast(Date date) {
        return date.getYear() < -10000;
    }

    public static boolean isInfPositive(Duration duration) {
        return INF_POSITIVE.equals(duration);
    }

    public static boolean isInfNegative(Duration duration) {
        return INF_NEGATIVE.equals(duration);
    }
}

Related

1. getPeriodInstant(LocalDate localDate)
2. getSnowflakeFromTimestamp(Instant date)
3. isEqualOrAfterNow(Instant now, Instant instant)
4. maxInstant(Instant v1, Instant v2)
5. nanos(Instant instant)
6. plusMilli(Instant _date, long _milli)
7. restrictToDaytime(Instant instantToRestrict, Instant thresholdTime, ZoneId userZoneId)
8. roundUp(final Instant time, final Duration duration)
9. secondsAgo(Instant end)