001/* 002 * Copyright 2015 DuraSpace, Inc. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016package org.fcrepo.kernel.api.utils; 017 018import java.io.InputStream; 019import java.util.Collection; 020 021/** 022 * A CacheEntry abstraction for the various possible types of entries 023 * @author fasseg 024 * 025 */ 026public interface CacheEntry { 027 028 /** 029 * Check the fixity of a {@link CacheEntry} 030 * @param algorithm the given algorithm 031 * @return a {@link FixityResult} containing the relevant data 032 */ 033 Collection<FixityResult> checkFixity(final String algorithm); 034 035 /** 036 * Get a raw input stream from the underlying store 037 * @return the content for this entry 038 */ 039 abstract InputStream getInputStream(); 040 041 /** 042 * Generate a human-readable identifier for the location of this entry 043 * 044 * @return human-readable identifier for the location of this entry 045 */ 046 abstract String getExternalIdentifier(); 047}