001/* 002 * Licensed to DuraSpace under one or more contributor license agreements. 003 * See the NOTICE file distributed with this work for additional information 004 * regarding copyright ownership. 005 * 006 * DuraSpace licenses this file to you under the Apache License, 007 * Version 2.0 (the "License"); you may not use this file except in 008 * compliance with the License. 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 */ 018package org.fcrepo.kernel.api.utils; 019 020import java.io.InputStream; 021import java.util.Collection; 022 023/** 024 * A CacheEntry abstraction for the various possible types of entries 025 * @author fasseg 026 * 027 */ 028public interface CacheEntry { 029 030 /** 031 * Check the fixity of a {@link CacheEntry} 032 * @param algorithm the given algorithm 033 * @return a {@link FixityResult} containing the relevant data 034 */ 035 Collection<FixityResult> checkFixity(final String algorithm); 036 037 /** 038 * Get a raw input stream from the underlying store 039 * @return the content for this entry 040 */ 041 abstract InputStream getInputStream(); 042 043 /** 044 * Generate a human-readable identifier for the location of this entry 045 * 046 * @return human-readable identifier for the location of this entry 047 */ 048 abstract String getExternalIdentifier(); 049}