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package org.hsqldb.types;

/**
 * Implementation of data item for TIMESTAMP.<p>
 *
 * @author Fred Toussi (fredt@users dot sourceforge.net)
 * @version 2.6.0
 * @since 1.9.0
 */
public class TimestampData {

    final long seconds;
    final int  nanos;
    final int  zone;

    public TimestampData(long seconds) {
        this.seconds = seconds;
        this.nanos   = 0;
        this.zone    = 0;
    }

    public TimestampData(long seconds, int nanos) {
        this.seconds = seconds;
        this.nanos   = nanos;
        this.zone    = 0;
    }

    public TimestampData(long seconds, int nanos, int zoneSeconds) {
        this.seconds = seconds;
        this.nanos   = nanos;
        this.zone    = zoneSeconds;
    }

    public static TimestampData fromMillisecondsGMT(long millis) {

        long sec   = millis / 1000;
        int  nanos = (int) (millis % 1000) * 1000000;

        return new TimestampData(sec, nanos);
    }

    public long getSeconds() {
        return seconds;
    }

    public int getNanos() {
        return nanos;
    }

    public int getZone() {
        return zone;
    }

    public long getMillis() {
        return seconds * 1000;
    }

    public boolean equals(Object other) {

        if (other instanceof TimestampData) {
            return seconds == ((TimestampData) other).seconds
                   && nanos == ((TimestampData) other).nanos
                   && zone == ((TimestampData) other).zone;
        }

        return false;
    }

    public int hashCode() {
        return (int) seconds ^ nanos;
    }

    public int compareTo(TimestampData b) {

        long diff = seconds - b.seconds;

        if (diff == 0) {
            diff = nanos - b.nanos;

            if (diff == 0) {
                return 0;
            }
        }

        return diff > 0
               ? 1
               : -1;
    }
}
