001/** 002 * Copyright 2015 DuraSpace, Inc. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016package org.fcrepo.kernel.impl.rdf.impl; 017 018import static org.fcrepo.kernel.impl.identifiers.NodeResourceConverter.nodeToResource; 019import static org.slf4j.LoggerFactory.getLogger; 020 021import javax.jcr.Node; 022 023import org.fcrepo.kernel.models.FedoraResource; 024import org.fcrepo.kernel.identifiers.IdentifierConverter; 025import org.fcrepo.kernel.utils.iterators.RdfStream; 026import org.slf4j.Logger; 027 028import com.google.common.base.Converter; 029import com.hp.hpl.jena.rdf.model.Resource; 030 031/** 032 * {@link RdfStream} that holds contexts related to a specific {@link Node}. 033 * 034 * @author ajs6f 035 * @since Oct 10, 2013 036 */ 037public class NodeRdfContext extends RdfStream { 038 039 private final FedoraResource resource; 040 041 private final IdentifierConverter<Resource, FedoraResource> idTranslator; 042 043 private final com.hp.hpl.jena.graph.Node subject; 044 045 private static final Logger LOGGER = getLogger(NodeRdfContext.class); 046 047 /** 048 * Default constructor. 049 * 050 * @param resource 051 * @param idTranslator 052 */ 053 public NodeRdfContext(final FedoraResource resource, 054 final IdentifierConverter<Resource, FedoraResource> idTranslator) { 055 super(); 056 this.resource = resource; 057 this.idTranslator = idTranslator; 058 this.subject = idTranslator.reverse().convert(resource).asNode(); 059 } 060 061 /** 062 * @return The {@link Node} in question 063 */ 064 public FedoraResource resource() { 065 return resource; 066 } 067 068 /** 069 * @return local {@link org.fcrepo.kernel.identifiers.IdentifierConverter} 070 */ 071 public IdentifierConverter<Resource, FedoraResource> translator() { 072 return idTranslator; 073 } 074 075 /** 076 * @return local {@link org.fcrepo.kernel.identifiers.IdentifierConverter} 077 */ 078 public Converter<Node, Resource> nodeConverter() { 079 return nodeToResource(idTranslator); 080 } 081 082 /** 083 * @return the RDF subject at the center of this context 084 */ 085 public com.hp.hpl.jena.graph.Node subject() { 086 return subject; 087 } 088}