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.mappings; 017 018import com.hp.hpl.jena.graph.Node; 019import com.hp.hpl.jena.graph.Triple; 020import org.fcrepo.kernel.utils.iterators.RdfStream; 021import org.slf4j.Logger; 022 023import javax.jcr.RepositoryException; 024import javax.jcr.nodetype.NodeDefinition; 025import javax.jcr.nodetype.NodeType; 026import java.util.Iterator; 027 028import static com.google.common.base.Throwables.propagate; 029import static com.hp.hpl.jena.graph.Triple.create; 030import static com.hp.hpl.jena.vocabulary.RDFS.range; 031import static org.slf4j.LoggerFactory.getLogger; 032 033/** 034 * Utility for moving Node Definitions into RDFS triples 035 * @author cbeer 036 */ 037public class NodeDefinitionToTriples extends ItemDefinitionToTriples<NodeDefinition> { 038 039 private static final Logger LOGGER = getLogger(NodeDefinitionToTriples.class); 040 041 /** 042 * Translate ItemDefinitions into triples. The definitions will hang off 043 * the provided RDF Node 044 * @param domain the domain 045 */ 046 public NodeDefinitionToTriples(final Node domain) { 047 super(domain); 048 } 049 050 @Override 051 public Iterator<Triple> apply(final NodeDefinition input) { 052 053 try { 054 055 final Node propertyDefinitionNode = getResource(input).asNode(); 056 057 final NodeType[] requiredPrimaryTypes = input.getRequiredPrimaryTypes(); 058 059 if (requiredPrimaryTypes.length > 1) { 060 // TODO we can express this as an OWL unionOf. But should we? 061 LOGGER.trace( 062 "Skipping RDFS:range for {} with multiple primary types", 063 propertyDefinitionNode.getName()); 064 } else if (requiredPrimaryTypes.length == 1) { 065 LOGGER.trace("Adding RDFS:range for {} with primary types {}", 066 input.getName(), 067 requiredPrimaryTypes[0].getName()); 068 return new RdfStream(create(propertyDefinitionNode, range 069 .asNode(), getResource(requiredPrimaryTypes[0]) 070 .asNode())).concat(super.apply(input)); 071 } else { 072 LOGGER.trace("Skipping RDFS:range for {} with no required primary types"); 073 } 074 return super.apply(input); 075 076 } catch (final RepositoryException e) { 077 throw propagate(e); 078 } 079 080 } 081}