    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 *      https://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
    018package org.apache.commons.collections4;
    019
    020/**
    021 * Defines a simple key value pair.
    022 * <p>
    023 * A Map Entry has considerable additional semantics over and above a simple key-value pair. This interface defines the minimum key value, with just the two get
    024 * methods.
    025 * </p>
    026 *
    027 * @param <K> The type of the key.
    028 * @param <V> The type of the value.
    029 * @since 3.0
    030 */
    031public interface KeyValue<K, V> {
    032
    033    /**
    034     * Gets the key from the pair.
    035     *
    036     * @return The key.
    037     */
    038    K getKey();
    039
    040    /**
    041     * Gets the value from the pair.
    042     *
    043     * @return The value.
    044     */
    045    V getValue();
    046}