https://github.com/eclipse/eclipse-collections/eclipse-collections-api: Eclipse Collections is a collections framework for Java. It has JDK-compatible List, Set and Map implementations with a rich API and set of utility classes that work with any JDK compatible Collections, Arrays, Maps or Strings. The iteration protocol was inspired by the Smalltalk collection framework.
  • Craig P. Motlin
  • Donald Raab
  • Mohammad A. Rezaei
  • Hiroshi Ito
  • Nikhil J. Nanivadekar
  • Sirisha Pratha 
/*
 * Copyright (c) 2021 Goldman Sachs and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * and Eclipse Distribution License v. 1.0 which accompany this distribution.
 * The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
 * and the Eclipse Distribution License is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 */

package org.eclipse.collections.api.tuple;

import java.io.Serializable;
import java.util.Objects;

public interface Triple<T1, T2, T3>
        extends Serializable, Comparable<Triple<T1, T2, T3>>
{
    T1 getOne();

    T2 getTwo();

    T3 getThree();

    Triple<T3, T2, T1> reverse();

    /*
     * Returns true if value of getOne() is equal to value of getTwo() and getThree().
     *
     * @since 11.0
     */
    default boolean isEqual()
    {
        return Objects.equals(this.getOne(), this.getTwo()) && Objects.equals(this.getOne(), this.getThree());
    }

    /*
     * Returns true if value of getOne() is the same instance as the value of getTwo() and getThree().
     *
     * @since 11.0
     */
    default boolean isSame()
    {
        return this.getOne() == this.getTwo() && this.getOne() == this.getThree();
    }
}