org.antlr.v4.runtime.misc.Pair.java Source code

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Here is the source code for org.antlr.v4.runtime.misc.Pair.java

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/*
 * Copyright (c) 2012-2017 The ANTLR Project. All rights reserved.
 * Use of this file is governed by the BSD 3-clause license that
 * can be found in the LICENSE.txt file in the project root.
 */

package org.antlr.v4.runtime.misc;

import java.io.Serializable;

public class Pair<A, B> implements Serializable {
    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 obj) {
        if (obj == this) {
            return true;
        } else if (!(obj instanceof Pair<?, ?>)) {
            return false;
        }

        Pair<?, ?> other = (Pair<?, ?>) obj;
        return ObjectEqualityComparator.INSTANCE.equals(a, other.a)
                && ObjectEqualityComparator.INSTANCE.equals(b, other.b);
    }

    @Override
    public int hashCode() {
        int hash = MurmurHash.initialize();
        hash = MurmurHash.update(hash, a);
        hash = MurmurHash.update(hash, b);
        return MurmurHash.finish(hash, 2);
    }

    @Override
    public String toString() {
        return String.format("(%s, %s)", a, b);
    }
}