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 java.util.stream.Stream;
021
022import org.apache.jena.graph.Triple;
023import org.fcrepo.kernel.api.Transaction;
024import org.fcrepo.kernel.api.models.FedoraResource;
025import org.fcrepo.kernel.api.rdf.LdpTriplePreferences;
026
027/**
028 * Service to call other services to return a desired set of triples.
029 * @author whikloj
030 * @since 6.0.0
031 */
032public interface ResourceTripleService {
033
034    /**
035     * Return the triples for the resource based on the Prefer: header preferences
036     * @param tx The transaction or null if none.
037     * @param resource the resource to get triples for.
038     * @param preferences the preferences asked for.
039     * @param limit limit on the number of children to display.
040     * @return a stream of triples.
041     */
042    Stream<Triple> getResourceTriples(final Transaction tx, final FedoraResource resource,
043                                      final LdpTriplePreferences preferences, final int limit);
044}