001 /*--------------------------------------------------------------------------+ 002 $Id: SoftRefStraightCacheBase.java 26268 2010-02-18 10:44:30Z juergens $ 003 | | 004 | Copyright 2005-2010 Technische Universitaet Muenchen | 005 | | 006 | Licensed under the Apache License, Version 2.0 (the "License"); | 007 | you may not use this file except in compliance with the License. | 008 | You may obtain a copy of the License at | 009 | | 010 | http://www.apache.org/licenses/LICENSE-2.0 | 011 | | 012 | Unless required by applicable law or agreed to in writing, software | 013 | distributed under the License is distributed on an "AS IS" BASIS, | 014 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | 015 | See the License for the specific language governing permissions and | 016 | limitations under the License. | 017 +--------------------------------------------------------------------------*/ 018 package edu.tum.cs.commons.cache; 019 020 import edu.tum.cs.commons.error.NeverThrownRuntimeException; 021 022 /** 023 * This a special base class for caches that work with identifiers that are 024 * suitable as hash keys. 025 * 026 * @author Florian Deissenboeck 027 * @author $Author: juergens $ 028 * 029 * @version $Rev: 26268 $ 030 * @levd.rating GREEN Hash: E85AF211BBB7DB2E0594B7C6F81453CC 031 * 032 * @param <I> 033 * the index type of the cache 034 * @param <E> 035 * the type stored in the cache 036 * @param <X> 037 * the type of exception thrown by the {@link #obtainItem(Object)} 038 * method. Use the {@link NeverThrownRuntimeException} if no 039 * exception will be thrown. 040 */ 041 public abstract class SoftRefStraightCacheBase<I, E, X extends Exception> 042 extends SoftRefCacheBase<I, I, E, X> { 043 044 /** 045 * This method simply returns the identifier. 046 */ 047 @Override 048 protected I getHashKey(I identifier) { 049 return identifier; 050 } 051 052 }