net.quasardb.qdb.ts.TimeRange Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of jni Show documentation

API for the JNI components of the QuasarDB API for Java. Should not be included directly.

There is a newer version: 3.14.1

package net.quasardb.qdb.ts;

import java.io.Serializable;

import net.quasardb.qdb.exception.InvalidArgumentException;
import net.quasardb.qdb.jni.*;

public class TimeRange implements Serializable {

    protected Timespec begin;
    protected Timespec end;

    public TimeRange (Timespec begin, Timespec end) {
        if (end.isBefore(begin)) {
            throw new InvalidArgumentException("Timerange must satisfy requirement begin <= end, but got begin(" + begin.toString() + ") and end(" + end.toString() + ") instead");
        }

        this.begin = begin;
        this.end = end;
    }

    public Timespec getBegin() {
        return this.begin;
    }

    /**
     * Returns a copy of this timerange with a different begin.
     */
    public TimeRange withBegin(Timespec b) {
        return new TimeRange(b, this.end);
    }

    public Timespec getEnd() {
        return this.end;
    }

    /**
     * Returns a copy of this timerange with a different end.
     */
    public TimeRange withEnd(Timespec e) {
        return new TimeRange(this.begin, e);
    }

    public String toString() {
        return "TimeRange (begin: " + this.begin.toString() + ", end: " + this.end.toString() + ")";
    }

    /**
     * Returns the union of two time ranges, that is, the range that can contain both
     * time ranges.
     */
    public static TimeRange union(TimeRange lhs, TimeRange rhs) {
        return new TimeRange(Timespec.min(lhs.begin, rhs.begin),
                             Timespec.max(lhs.end, rhs.end));
    }

    /**
     * Returns the intersection of two time ranges, that is, the widest possible range that
     * is contained by both time ranges.
     *
     * Undefined behavior if the two timespecs do not overlap.
     */
    public static TimeRange intersect(TimeRange lhs, TimeRange rhs) {
        return new TimeRange(Timespec.max(lhs.begin, rhs.begin),
                             Timespec.min(lhs.end, rhs.end));
    }

    /**
     * Merges a new timespec into this time range, and widens the time range if necessary
     * to be wide enough to contain this time point.
     */
    public static TimeRange merge(TimeRange r, Timespec t) {
        r.begin = Timespec.min(r.begin, t);
        r.end = Timespec.max(r.end, t);
        return r;
    }
}