| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.rya.rdftriplestore.inference; |
| |
| import java.util.LinkedHashSet; |
| import java.util.Set; |
| |
| import org.apache.log4j.Logger; |
| import org.apache.rya.api.RdfCloudTripleStoreConfiguration; |
| import org.eclipse.rdf4j.model.Resource; |
| import org.eclipse.rdf4j.model.vocabulary.RDF; |
| import org.eclipse.rdf4j.query.BindingSet; |
| import org.eclipse.rdf4j.query.algebra.BindingSetAssignment; |
| import org.eclipse.rdf4j.query.algebra.StatementPattern; |
| import org.eclipse.rdf4j.query.algebra.Var; |
| import org.eclipse.rdf4j.query.algebra.evaluation.QueryBindingSet; |
| |
| /** |
| * Visitor for handling owl:oneOf inferencing on a node. |
| */ |
| public class OneOfVisitor extends AbstractInferVisitor { |
| private static final Logger log = Logger.getLogger(OneOfVisitor.class); |
| |
| /** |
| * Creates a new instance of {@link OneOfVisitor}. |
| * @param conf the {@link RdfCloudeTripleStoreConfiguration}. |
| * @param inferenceEngine the {@link InferenceEngine}. |
| */ |
| public OneOfVisitor(final RdfCloudTripleStoreConfiguration conf, final InferenceEngine inferenceEngine) { |
| super(conf, inferenceEngine); |
| include = conf.isInferOneOf(); |
| } |
| |
| @Override |
| protected void meetSP(final StatementPattern node) throws Exception { |
| final Var subVar = node.getSubjectVar(); |
| final Var predVar = node.getPredicateVar(); |
| final Var objVar = node.getObjectVar(); |
| final Var conVar = node.getContextVar(); |
| if (predVar != null && objVar != null && objVar.getValue() != null && objVar.getValue() instanceof Resource && RDF.TYPE.equals(predVar.getValue()) && !EXPANDED.equals(conVar)) { |
| final Resource object = (Resource) objVar.getValue(); |
| if (inferenceEngine.isEnumeratedType(object)) { |
| final Set<BindingSet> solutions = new LinkedHashSet<>(); |
| final Set<Resource> enumeration = inferenceEngine.getEnumeration(object); |
| for (final Resource enumType : enumeration) { |
| final QueryBindingSet qbs = new QueryBindingSet(); |
| qbs.addBinding(subVar.getName(), enumType); |
| solutions.add(qbs); |
| } |
| |
| if (!solutions.isEmpty()) { |
| final BindingSetAssignment enumNode = new BindingSetAssignment(); |
| enumNode.setBindingSets(solutions); |
| |
| node.replaceWith(enumNode); |
| log.trace("Replacing node with inferred one of enumeration: " + enumNode); |
| } |
| } |
| } |
| } |
| } |