/* * Licensed 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. * * See the NOTICE file distributed with this work for additional * information regarding copyright ownership. */ package org.topbraid.shacl.arq.functions; import java.util.HashSet; import java.util.Set; import org.apache.jena.graph.Node; import org.apache.jena.query.Dataset; import org.apache.jena.rdf.model.Model; import org.apache.jena.rdf.model.ModelFactory; import org.apache.jena.rdf.model.Resource; import org.apache.jena.sparql.core.DatasetImpl; import org.apache.jena.sparql.core.Substitute; import org.apache.jena.sparql.core.Var; import org.apache.jena.sparql.engine.ExecutionContext; import org.apache.jena.sparql.engine.QueryIterator; import org.apache.jena.sparql.engine.binding.Binding; import org.apache.jena.sparql.engine.iterator.QueryIterExtendByVar; import org.apache.jena.sparql.expr.ExprEvalException; import org.apache.jena.sparql.pfunction.PropFuncArg; import org.apache.jena.sparql.pfunction.PropertyFunctionBase; import org.topbraid.jenax.util.DatasetWithDifferentDefaultModel; import org.topbraid.shacl.util.SHACLUtil; /** * The property function tosh:targetContains. * Binds the variable on the right hand side with all focus nodes produced by the * SHACL target on the left hand side. * * (?myTarget ?shapesGraph) tosh:targetContains ?focusNode . * * @author Holger Knublauch */ public class TargetContainsPFunction extends PropertyFunctionBase { @Override public QueryIterator exec(Binding binding, PropFuncArg argSubject, Node predicate, PropFuncArg argObject, ExecutionContext execCxt) { argSubject = Substitute.substitute(argSubject, binding); argObject = Substitute.substitute(argObject, binding); if(!argObject.getArg().isVariable()) { throw new ExprEvalException("Right hand side of tosh:targetContains must be a variable"); } Node targetNode = argSubject.getArgList().get(0); Node shapesGraphNode = argSubject.getArgList().get(1); Model currentModel = ModelFactory.createModelForGraph(execCxt.getActiveGraph()); Dataset dataset = new DatasetWithDifferentDefaultModel(currentModel, DatasetImpl.wrap(execCxt.getDataset())); Model model = dataset.getNamedModel(shapesGraphNode.getURI()); Resource target = (Resource) model.asRDFNode(targetNode); Set<Node> focusNodes = new HashSet<Node>(); SHACLUtil.addNodesInTarget(target, dataset, focusNodes); return new QueryIterExtendByVar(binding, (Var) argObject.getArg(), focusNodes.iterator(), execCxt); } }