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.services;
019
020import org.fcrepo.kernel.api.RdfStream;
021import org.fcrepo.kernel.api.exception.UnsupportedAlgorithmException;
022import org.fcrepo.kernel.api.models.Binary;
023
024import java.net.URI;
025import java.util.Collection;
026
027/**
028 * Service which calculates and compares digests for binary objects
029 *
030 * @author peichman
031 */
032public interface FixityService {
033  /**
034   * Calculate the requested set of digests for the provided binary
035   * @param binary the binary resource to
036   * @param algorithms set of digest algorithms to calculate
037   * @return list of calculated digests
038   * @throws UnsupportedAlgorithmException if unsupported digest algorithms were provided
039   */
040  Collection<URI> getFixity(Binary binary, Collection<String> algorithms) throws UnsupportedAlgorithmException;
041
042  /**
043   * Digest this binary with the digest algorithms provided
044   * @param binary the binary resource to digest
045   * @return The result of the fixity check.
046   */
047  RdfStream checkFixity(Binary binary);
048}