/*

 * Copyright (C) 2007-2010 Júlio Vilmar Gesser.

 * Copyright (C) 2011, 2013-2021 The JavaParser Team.

 *

 * This file is part of JavaParser.

 *

 * JavaParser can be used either under the terms of

 * a) the GNU Lesser General Public License as published by

 *     the Free Software Foundation, either version 3 of the License, or

 *     (at your option) any later version.

 * b) the terms of the Apache License

 *

 * You should have received a copy of both licenses in LICENCE.LGPL and

 * LICENCE.APACHE. Please refer to those files for details.

 *

 * JavaParser 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 Lesser General Public License for more details.

 */

package com.github.javaparser.utils;

import java.util.Objects;

import static com.github.javaparser.utils.CodeGenerationUtils.f;

/**

 * Simply a pair of objects.

 *

 * @param <A> type of object a.

 * @param <B> type of object b.

 */

public class Pair<A, B> {

    public final A a;

    public final B b;

    public Pair(A a, B b) {

        this.a = a;

        this.b = b;

    }

    @Override

    public boolean equals(Object o) {

        if (this == o) return true;

        if (o == null || getClass() != o.getClass()) return false;

        Pair<?, ?> pair = (Pair<?, ?>) o;

        if (!Objects.equals(a, pair.a)) return false;

        if (!Objects.equals(b, pair.b)) return false;

        return true;

    }

    @Override

    public int hashCode() {

        int result = a != null ? a.hashCode() : 0;

        return 31 * result + (b != null ? b.hashCode() : 0);

    }

    @Override

    public String toString() {

        return f("<%s, %s>", a, b);

    }

}