| /* |
| * 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.Collection; |
| import java.util.UUID; |
| |
| import org.apache.rya.api.RdfCloudTripleStoreConfiguration; |
| import org.apache.rya.api.utils.NullableStatementImpl; |
| import org.apache.rya.rdftriplestore.utils.FixedStatementPattern; |
| import org.eclipse.rdf4j.model.IRI; |
| import org.eclipse.rdf4j.model.vocabulary.RDF; |
| import org.eclipse.rdf4j.model.vocabulary.RDFS; |
| import org.eclipse.rdf4j.query.algebra.StatementPattern; |
| import org.eclipse.rdf4j.query.algebra.Var; |
| |
| /** |
| * Class SubClassOfVisitor |
| * Date: Mar 29, 2011 |
| * Time: 11:28:34 AM |
| */ |
| public class SubClassOfVisitor extends AbstractInferVisitor { |
| |
| public SubClassOfVisitor(final RdfCloudTripleStoreConfiguration conf, final InferenceEngine inferenceEngine) { |
| super(conf, inferenceEngine); |
| include = conf.isInferSubClassOf(); |
| } |
| |
| @Override |
| protected void meetSP(final StatementPattern node) throws Exception { |
| final StatementPattern sp = node.clone(); |
| final Var predVar = sp.getPredicateVar(); |
| final Var objVar = sp.getObjectVar(); |
| final Var conVar = sp.getContextVar(); |
| if (predVar != null && objVar != null && objVar.getValue() != null && RDF.TYPE.equals(predVar.getValue()) |
| && !EXPANDED.equals(conVar)) { |
| /** |
| * ?type sesame:directSubClassOf ub:Student . ?student rdf:type ?type + |
| */ |
| // String s = UUID.randomUUID().toString(); |
| // Var typeVar = new Var(s); |
| // StatementPattern subClassOf = new StatementPattern(typeVar, new Var("c-" + s, SESAME.DIRECTSUBCLASSOF), objVar, SUBCLASS_EXPANDED); |
| // StatementPattern rdfType = new StatementPattern(sp.getSubjectVar(), sp.getPredicateVar(), typeVar, SUBCLASS_EXPANDED); |
| // InferJoin join = new InferJoin(subClassOf, rdfType); |
| // join.getProperties().put(InferConstants.INFERRED, InferConstants.TRUE); |
| // node.replaceWith(join); |
| |
| final IRI subclassof_iri = (IRI) objVar.getValue(); |
| final Collection<IRI> parents = InferenceEngine.findParents(inferenceEngine.getSubClassOfGraph(), subclassof_iri); |
| if (parents != null && parents.size() > 0) { |
| final String s = UUID.randomUUID().toString(); |
| final Var typeVar = new Var(s); |
| final FixedStatementPattern fsp = new FixedStatementPattern(typeVar, new Var("c-" + s, RDFS.SUBCLASSOF), objVar, conVar); |
| parents.add(subclassof_iri); |
| for (final IRI iri : parents) { |
| fsp.statements.add(new NullableStatementImpl(iri, RDFS.SUBCLASSOF, subclassof_iri)); |
| } |
| |
| final StatementPattern rdfType = new DoNotExpandSP(sp.getSubjectVar(), sp.getPredicateVar(), typeVar, conVar); |
| final InferJoin join = new InferJoin(fsp, rdfType); |
| join.getProperties().put(InferConstants.INFERRED, InferConstants.TRUE); |
| node.replaceWith(join); |
| } |
| |
| // if (parents != null && parents.size() > 0) { |
| // StatementPatterns statementPatterns = new StatementPatterns(); |
| // statementPatterns.patterns.add(node); |
| // Var subjVar = node.getSubjectVar(); |
| // for (IRI iri : parents) { |
| // statementPatterns.patterns.add(new StatementPattern(subjVar, predVar, new Var(objVar.getName(), iri))); |
| // } |
| // node.replaceWith(statementPatterns); |
| // } |
| |
| // if (parents != null && parents.size() > 0) { |
| // VarCollection vc = new VarCollection(); |
| // vc.setName(objVar.getName()); |
| // vc.values.add(objVar); |
| // for (IRI iri : parents) { |
| // vc.values.add(new Var(objVar.getName(), iri)); |
| // } |
| // Var subjVar = node.getSubjectVar(); |
| // node.replaceWith(new StatementPattern(subjVar, predVar, vc, node.getContextVar())); |
| // } |
| } |
| } |
| |
| } |