| /* |
| * 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.jena.shacl.engine; |
| |
| import java.util.HashSet; |
| import java.util.Set; |
| import java.util.function.Function; |
| import java.util.stream.Collectors; |
| import java.util.stream.Stream; |
| |
| import org.apache.jena.atlas.iterator.Iter; |
| import org.apache.jena.graph.Graph; |
| import org.apache.jena.graph.Node; |
| import org.apache.jena.graph.Triple; |
| import org.apache.jena.vocabulary.RDF; |
| |
| /** Calculate focus nodes. */ |
| public class FocusNodes { |
| |
| /** Return all the focus nodes for a given set of shapes and data. */ |
| public static Set<Node> focusNodes(Targets shapes, Graph data) { |
| Set<Node> x1 = focusTargetNode(shapes); |
| Set<Node> x2 = focusTargetClass(shapes, data); |
| Set<Node> x3 = focusTargetObjectsOf(shapes, data); |
| Set<Node> x4 = focusTargetSubjectsOf(shapes, data); |
| |
| Set<Node> z = new HashSet<>(); |
| z.addAll(x1); |
| z.addAll(x2); |
| z.addAll(x3); |
| z.addAll(x4); |
| return z; |
| } |
| |
| public static Set<Node> focusTargetNode(Targets shapes) { |
| return shapes.targetNodes; |
| } |
| |
| private static void focusTargetNode(Set<Node> acc, Targets shapes) { |
| acc.addAll(shapes.targetNodes); |
| } |
| |
| public static Set<Node> focusTargetClass(Targets shapes, Graph data) { |
| // Classes |
| Stream<Node> cls = targetClasses(shapes); |
| // Individuals of. |
| Set<Node> indiv = |
| cls.flatMap(type->stream(data, null, RDF.Nodes.type, type) ) |
| .map(Triple::getObject) |
| .collect(Collectors.toSet()) |
| ; |
| return indiv; |
| } |
| |
| static Stream<Node> targetClasses(Targets shapes) { |
| return shapes.targetClasses.stream(); |
| } |
| |
| public static Set<Node> focusTargetObjectsOf(Targets shapes, Graph data) { |
| return focusTargetOf(shapes, shapes.propertyTargetObjectsOf, data, Triple::getObject); |
| } |
| |
| public static Set<Node> focusTargetSubjectsOf(Targets shapes, Graph data) { |
| return focusTargetOf(shapes, shapes.propertyTargetSubjectsOf, data, Triple::getSubject); |
| } |
| |
| private static Set<Node> focusTargetOf(Targets shapes, Set<Node> targetOf, Graph data, Function<Triple, Node> projection) { |
| Stream <Node> z = targetOf.stream().flatMap(p->stream(data, null, p, null)).map(projection); |
| return set(z); |
| } |
| |
| private static Stream<Triple> stream(Graph g, Node s, Node p, Node o) { |
| return Iter.asStream(g.find(s, p, o)); |
| } |
| |
| private static Set<Node> set(Stream<Node> z) { |
| return z.collect(Collectors.toSet()); |
| } |
| } |