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     */
017    package org.apache.camel.util;
018    
019    /**
020     * Holder for a key and value.
021     *
022     * @version $Revision: 835531 $
023     */
024    public 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            }
057    
058            return true;
059        }
060    
061        @Override
062        public int hashCode() {
063            int result = key != null ? key.hashCode() : 0;
064            result = 31 * result + (value != null ? value.hashCode() : 0);
065            return result;
066        }
067    
068        @Override
069        public String toString() {
070            return key + " -> " + value;
071        }
072    }