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
019/**
020 * Holder for a key and value.
021 *
022 * @version 
023 */
024public class KeyValueHolder<K, V> {
025
026    private K key;
027    private 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    @SuppressWarnings("unchecked")
043    @Override
044    public boolean equals(Object o) {
045        if (this == o) {
046            return true;
047        }
048        if (o == null || getClass() != o.getClass()) {
049            return false;
050        }
051
052        KeyValueHolder<K, V> that = (KeyValueHolder<K, V>) o;
053
054        if (key != null ? !key.equals(that.key) : that.key != null) {
055            return false;
056        } else if (value != null ? !value.equals(that.value) : that.value != null) {
057            return false;
058        }
059
060        return true;
061    }
062
063    @Override
064    public int hashCode() {
065        int result = key != null ? key.hashCode() : 0;
066        result = 31 * result + (value != null ? value.hashCode() : 0);
067        return result;
068    }
069
070    @Override
071    public String toString() {
072        return key + " -> " + value;
073    }
074}