ring-android/libringclient/src/main/java/cx/ring/utils/Tuple.java

/*
 *  Copyright (C) 2004-2020 Savoir-faire Linux Inc.
 *
 *  Author: Alexandre Lision <alexandre.lision@savoirfairelinux.com>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
package cx.ring.utils;

public class Tuple<X, Y> {
    public final X first;
    public final Y second;

    public Tuple(X first, Y second) {
        this.first = first;
        this.second = second;
    }

    @Override
    public String toString() {
        return "(" + first + "," + second + ")";
    }

    @Override
    public boolean equals(Object other) {
        if (other == this) {
            return true;
        }

        if (!(other instanceof Tuple)) {
            return false;
        }

        Tuple<X, Y> other_ = (Tuple<X, Y>) other;

        // this may cause NPE if nulls are valid values for first or second.
        // The logic may be improved to handle nulls properly, if needed.
        return other_.first.equals(this.first) && other_.second.equals(this.second);
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((first == null) ? 0 : first.hashCode());
        result = prime * result + ((second == null) ? 0 : second.hashCode());
        return result;
    }
}