io.deephaven.tuple.EmptyTuple Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of deephaven-engine-tuple Show documentation

Engine Tuples: Value sequences for use in aggregations, joins, and indexing

There is a newer version: 0.36.1

Show newest version

//
// Copyright (c) 2016-2024 Deephaven Data Labs and Patent Pending
//
package io.deephaven.tuple;

import org.jetbrains.annotations.NotNull;

import java.io.*;
import java.util.function.UnaryOperator;

/**
 * 
 * 0-Tuple key class.
 */
public enum EmptyTuple implements Comparable, Serializable, CanonicalizableTuple {

    INSTANCE;

    private static final long serialVersionUID = 1L;

    @Override
    public String toString() {
        return "EmptyTuple";
    }

    @Override
    public EmptyTuple canonicalize(@NotNull final UnaryOperator