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/*
 * Copyright (c) "Neo4j"
 * Neo4j Sweden AB [https://neo4j.com]
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.neo4j.driver.internal;

import java.util.Objects;
import org.neo4j.driver.util.Pair;

public class InternalPair implements Pair {
    private final K key;
    private final V value;

    protected InternalPair(K key, V value) {
        Objects.requireNonNull(key);
        Objects.requireNonNull(value);
        this.key = key;
        this.value = value;
    }

    public K key() {
        return key;
    }

    public V value() {
        return value;
    }

    public static  Pair of(K key, V value) {
        return new InternalPair<>(key, value);
    }

    @Override
    public String toString() {
        return String.format("%s: %s", key, value);
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }

        var that = (InternalPair) o;

        return key.equals(that.key) && value.equals(that.value);
    }

    @Override
    public int hashCode() {
        var result = key.hashCode();
        result = 31 * result + value.hashCode();
        return result;
    }
}