001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.camel.util;
018
019import java.util.Objects;
020
021/**
022 * Holder for a key and value.
023 */
024public class KeyValueHolder<K, V> {
025
026    private final K key;
027    private final V value;
028
029    public KeyValueHolder(K key, V value) {
030        this.key = key;
031        this.value = value;
032    }
033
034    public K getKey() {
035        return key;
036    }
037
038    public V getValue() {
039        return value;
040    }
041
042    @Override
043    public boolean equals(Object o) {
044        if (this == o) {
045            return true;
046        }
047        if (o == null || getClass() != o.getClass()) {
048            return false;
049        }
050        KeyValueHolder<?, ?> that = (KeyValueHolder<?, ?>) o;
051        return Objects.equals(key, that.key)
052                && Objects.equals(value, that.value);
053    }
054
055    @Override
056    public int hashCode() {
057        return Objects.hash(key, value);
058    }
059
060    @Override
061    public String toString() {
062        return key + " -> " + value;
063    }
064}