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.impl.services;
019
020import org.apache.jena.graph.Node;
021import org.apache.jena.graph.Triple;
022import org.fcrepo.kernel.api.ContainmentIndex;
023import org.fcrepo.kernel.api.Transaction;
024import org.fcrepo.kernel.api.models.FedoraResource;
025import org.fcrepo.kernel.api.services.ContainmentTriplesService;
026import org.springframework.beans.factory.annotation.Autowired;
027import org.springframework.beans.factory.annotation.Qualifier;
028import org.springframework.stereotype.Component;
029
030import java.util.stream.Stream;
031
032import static org.apache.jena.graph.NodeFactory.createURI;
033import static org.fcrepo.kernel.api.RdfLexicon.CONTAINS;
034
035/**
036 * Containment Triples service.
037 * @author whikloj
038 * @since 6.0.0
039 */
040@Component
041public class ContainmentTriplesServiceImpl implements ContainmentTriplesService {
042
043    @Autowired
044    @Qualifier("containmentIndex")
045    private ContainmentIndex containmentIndex;
046
047    @Override
048    public Stream<Triple> get(final Transaction tx, final FedoraResource resource) {
049        final var fedoraId = resource.getFedoraId();
050        final var nodeUri = fedoraId.isMemento() ? fedoraId.getBaseId() : fedoraId.getFullId();
051        final Node currentNode = createURI(nodeUri);
052        return containmentIndex.getContains(tx, fedoraId).map(c ->
053                new Triple(currentNode, CONTAINS.asNode(), createURI(c)));
054    }
055
056}