001package org.cache2k;
002
003/*
004 * #%L
005 * cache2k API only package
006 * %%
007 * Copyright (C) 2000 - 2016 headissue GmbH, Munich
008 * %%
009 * Licensed under the Apache License, Version 2.0 (the "License");
010 * you may not use this file except in compliance with the License.
011 * You may obtain a copy of the License at
012 * 
013 *      http://www.apache.org/licenses/LICENSE-2.0
014 * 
015 * Unless required by applicable law or agreed to in writing, software
016 * distributed under the License is distributed on an "AS IS" BASIS,
017 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
018 * See the License for the specific language governing permissions and
019 * limitations under the License.
020 * #L%
021 */
022
023/**
024 * Simple interface to return a value selected by a key object. Cache users
025 * of a read-through cache may choose this simple interface for requesting data
026 * only, rather to use the full blown cache interface.
027 *
028 * @author Jens Wilke; created: 2013-12-17
029 */
030public interface KeyValueSource<K, T> extends CacheSource<K, T> {
031
032  /**
033   * Returns object mapped to key
034   */
035  public abstract T get(K key);
036
037}