001package org.cache2k;
002
003/*
004 * #%L
005 * cache2k API only package
006 * %%
007 * Copyright (C) 2000 - 2014 headissue GmbH, Munich
008 * %%
009 * This program is free software: you can redistribute it and/or modify
010 * it under the terms of the GNU General Public License as
011 * published by the Free Software Foundation, either version 3 of the 
012 * License, or (at your option) any later version.
013 * 
014 * This program is distributed in the hope that it will be useful,
015 * but WITHOUT ANY WARRANTY; without even the implied warranty of
016 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
017 * GNU General Public License for more details.
018 * 
019 * You should have received a copy of the GNU General Public 
020 * License along with this program.  If not, see
021 * <http://www.gnu.org/licenses/gpl-3.0.html>.
022 * #L%
023 */
024
025/**
026 * Simple interface to return a value selected by a key object. Cache users
027 * of a read-through cache may choose this simple interface for requesting data
028 * only, rather to use the full blown cache interface.
029 *
030 * @author Jens Wilke; created: 2013-12-17
031 */
032public interface KeyValueSource<K, T> extends CacheSource<K, T> {
033
034  /**
035   * Returns object mapped to key
036   */
037  public abstract T get(K key);
038
039}