/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 com.alipay.sofa.jraft.rhea.util;

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

/**
 *
 * @author jiachun.fjc
 */
public class Pair<K, V> implements Serializable {

    private static final long serialVersionUID = 3390134330336111160L;

    private K                 key;
    private V                 value;

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

    public Pair(K key, V value) {
        this.key = key;
        this.value = value;
    }

    public K getKey() {
        return key;
    }

    public void setKey(K key) {
        this.key = key;
    }

    public V getValue() {
        return value;
    }

    public void setValue(V value) {
        this.value = value;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o)
            return true;
        if (o == null || getClass() != o.getClass())
            return false;
        Pair<?, ?> pair = (Pair<?, ?>) o;
        return Objects.equals(key, pair.key) && Objects.equals(value, pair.value);
    }

    @Override
    public int hashCode() {
        return Objects.hash(key, value);
    }

    @Override
    public String toString() {
        return "Pair{" + "key=" + key + ", value=" + value + '}';
    }
}
