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.modeshape.rdf.impl; 017 018import static org.fcrepo.kernel.modeshape.identifiers.NodeResourceConverter.nodeToResource; 019 020import javax.jcr.Node; 021 022import org.fcrepo.kernel.api.identifiers.IdentifierConverter; 023import org.fcrepo.kernel.api.models.FedoraResource; 024import org.fcrepo.kernel.api.rdf.DefaultRdfStream; 025 026import com.google.common.base.Converter; 027import com.hp.hpl.jena.rdf.model.Resource; 028 029/** 030 * {@link org.fcrepo.kernel.api.RdfStream} that holds contexts related to a specific {@link Node}. 031 * 032 * @author ajs6f 033 * @since Oct 10, 2013 034 */ 035public class NodeRdfContext extends DefaultRdfStream { 036 037 private final FedoraResource resource; 038 039 private final IdentifierConverter<Resource, FedoraResource> idTranslator; 040 041 private final com.hp.hpl.jena.graph.Node subject; 042 043 /** 044 * Default constructor. 045 * 046 * @param resource the resource 047 * @param idTranslator the id translator 048 */ 049 public NodeRdfContext(final FedoraResource resource, 050 final IdentifierConverter<Resource, FedoraResource> idTranslator) { 051 super(idTranslator.reverse().convert(resource).asNode()); 052 this.resource = resource; 053 this.idTranslator = idTranslator; 054 this.subject = uriFor(resource); 055 } 056 057 /** 058 * @return The {@link Node} in question 059 */ 060 public FedoraResource resource() { 061 return resource; 062 } 063 064 /** 065 * @return local {@link org.fcrepo.kernel.api.identifiers.IdentifierConverter} 066 */ 067 public IdentifierConverter<Resource, FedoraResource> translator() { 068 return idTranslator; 069 } 070 071 /** 072 * @param resource a Fedora model instance that must be identified by an URI 073 * @return a translated URI for that resource 074 */ 075 protected com.hp.hpl.jena.graph.Node uriFor(final FedoraResource resource) { 076 return translator().reverse().convert(resource).asNode(); 077 } 078 079 /** 080 * @return local {@link org.fcrepo.kernel.api.identifiers.IdentifierConverter} 081 */ 082 public Converter<Node, Resource> nodeConverter() { 083 return nodeToResource(idTranslator); 084 } 085 086 /** 087 * @return the RDF subject at the center of this context 088 */ 089 public com.hp.hpl.jena.graph.Node subject() { 090 return subject; 091 } 092}