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 object for a given value.
021     */
022    public class ValueHolder<V> {
023        private V value;
024    
025        /**
026         * @deprecated should be immutable, will be removed in Camel 3.0
027         */
028        @Deprecated
029        public ValueHolder() {
030        }
031    
032        public ValueHolder(V val) {
033            value = val;
034        }
035    
036        public V get() {
037            return value;
038        }
039    
040        /**
041         * @deprecated should be immutable, will be removed in Camel 3.0
042         */
043        @Deprecated
044        public void set(V val) {
045            value = val;
046        }
047    
048        @Override
049        public boolean equals(Object o) {
050            if (this == o) {
051                return true;
052            }
053            if (o == null || getClass() != o.getClass()) {
054                return false;
055            }
056    
057            ValueHolder<?> that = (ValueHolder<?>) o;
058    
059            if (value != null ? !value.equals(that.value) : that.value != null) {
060                return false;
061            }
062    
063            return true;
064        }
065    
066        @Override
067        public int hashCode() {
068            return value != null ? value.hashCode() : 0;
069        }
070    }