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 static java.util.stream.Stream.of; 021import static org.apache.jena.graph.NodeFactory.createURI; 022import static org.apache.jena.graph.Triple.create; 023import static org.apache.jena.vocabulary.RDF.type; 024import static org.fcrepo.kernel.api.RdfLexicon.REPOSITORY_NAMESPACE; 025import static org.fcrepo.kernel.modeshape.FedoraJcrConstants.ROOT; 026import static org.slf4j.LoggerFactory.getLogger; 027 028import org.apache.jena.rdf.model.Resource; 029import org.fcrepo.kernel.api.identifiers.IdentifierConverter; 030import org.fcrepo.kernel.api.models.FedoraResource; 031 032import java.util.stream.Stream; 033import org.slf4j.Logger; 034 035import org.apache.jena.graph.Triple; 036 037/** 038 * Assemble {@link Triple}s derived from the root of a repository. 039 * 040 * @author ajs6f 041 * @since Oct 18, 2013 042 */ 043public class RootRdfContext extends NodeRdfContext { 044 045 private static final Logger LOGGER = getLogger(RootRdfContext.class); 046 047 /** 048 * Ordinary constructor. 049 * 050 * @param resource the resource 051 * @param idTranslator the id translator 052 */ 053 public RootRdfContext(final FedoraResource resource, 054 final IdentifierConverter<Resource, FedoraResource> idTranslator) { 055 super(resource, idTranslator); 056 057 if (resource().hasType(ROOT)) { 058 concat(getRepositoryTriples()); 059 } 060 } 061 062 private Stream<Triple> getRepositoryTriples() { 063 LOGGER.trace("Creating RDF triples for repository description"); 064 065 final Stream.Builder<Triple> b = Stream.builder(); 066 067 of("RepositoryRoot", "Resource", "Container").forEach(x -> 068 b.accept(create(subject(), type.asNode(), createURI(REPOSITORY_NAMESPACE + x)))); 069 070 // offer all these accumulated triples 071 return b.build(); 072 } 073}