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.modeshape.rdf.impl;
019
020import org.apache.jena.rdf.model.Resource;
021import org.fcrepo.kernel.api.models.FedoraResource;
022import org.fcrepo.kernel.api.identifiers.IdentifierConverter;
023import org.slf4j.Logger;
024
025import javax.jcr.RepositoryException;
026
027import static org.apache.jena.graph.Triple.create;
028import static org.fcrepo.kernel.api.RdfLexicon.CONTAINS;
029import static org.fcrepo.kernel.modeshape.utils.FedoraTypesUtils.getJcrNode;
030import static org.slf4j.LoggerFactory.getLogger;
031
032/**
033 * @author cabeer
034 * @author ajs6f
035 * @since 9/16/14
036 */
037public class ChildrenRdfContext extends NodeRdfContext {
038
039    private static final Logger LOGGER = getLogger(ChildrenRdfContext.class);
040
041    /**
042     * Default constructor.
043     *
044     * @param resource the resource
045     * @param idTranslator the idTranslator
046     * @throws javax.jcr.RepositoryException if repository exception occurred
047     */
048    public ChildrenRdfContext(final FedoraResource resource,
049                              final IdentifierConverter<Resource, FedoraResource> idTranslator)
050            throws RepositoryException {
051        super(resource, idTranslator);
052
053        if (getJcrNode(resource).hasNodes()) {
054            LOGGER.trace("Found children of this resource: {}", resource.getPath());
055
056            concat(resource().getChildren().peek(child -> LOGGER.trace("Creating triple for child node: {}", child))
057                    .map(child -> create(subject(), CONTAINS.asNode(), uriFor(child.getDescribedResource()))));
058        }
059    }
060
061}