| /* |
| * 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.forwardchain.rule; |
| |
| import java.util.Set; |
| |
| import org.apache.rya.api.domain.VarNameUtils; |
| import org.eclipse.rdf4j.model.IRI; |
| import org.eclipse.rdf4j.model.Value; |
| import org.eclipse.rdf4j.model.ValueFactory; |
| import org.eclipse.rdf4j.model.impl.SimpleValueFactory; |
| import org.eclipse.rdf4j.model.vocabulary.FOAF; |
| 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.StatementPattern.Scope; |
| import org.eclipse.rdf4j.query.algebra.Var; |
| import org.eclipse.rdf4j.query.parser.ParsedQuery; |
| import org.eclipse.rdf4j.query.parser.sparql.SPARQLParser; |
| import org.junit.Assert; |
| import org.junit.Test; |
| |
| import com.google.common.collect.Sets; |
| |
| public class AntecedentVisitorTest { |
| private static Var c(Value val) { |
| final Var v = VarNameUtils.createUniqueConstVar(val); |
| v.setAnonymous(true); |
| return v; |
| } |
| |
| private static final ValueFactory VF = SimpleValueFactory.getInstance(); |
| private static final String EX = "http://example.org/"; |
| private static final IRI G1 = VF.createIRI(EX, "Graph1"); |
| private static final IRI G2 = VF.createIRI(EX, "Graph2"); |
| |
| @Test |
| public void testSelectQuery() throws Exception { |
| String text = "PREFIX foaf: <" + FOAF.NAMESPACE + ">\n" |
| + "SELECT * WHERE {\n" |
| + " ?x a foaf:Person .\n" |
| + " ?y a foaf:Person .\n" |
| + " ?x foaf:knows ?y .\n" |
| + "}"; |
| ParsedQuery query = new SPARQLParser().parseQuery(text, null); |
| AntecedentVisitor visitor = new AntecedentVisitor(); |
| query.getTupleExpr().visit(visitor); |
| Set<StatementPattern> expected = Sets.newHashSet( |
| new StatementPattern(new Var("x"), c(RDF.TYPE), c(FOAF.PERSON)), |
| new StatementPattern(new Var("y"), c(RDF.TYPE), c(FOAF.PERSON)), |
| new StatementPattern(new Var("x"), c(FOAF.KNOWS), new Var("y"))); |
| Assert.assertEquals(expected, visitor.getAntecedents()); |
| } |
| |
| @Test |
| public void testConstructQuery() throws Exception { |
| String text = "PREFIX foaf: <" + FOAF.NAMESPACE + ">\n" |
| + "CONSTRUCT {\n" |
| + " ?y foaf:knows ?x .\n" |
| + " ?y <urn:knows> ?x .\n" |
| + " ?x <urn:knows> ?y .\n" |
| + "} WHERE {\n" |
| + " ?x a foaf:Person .\n" |
| + " ?y a foaf:Person .\n" |
| + " ?x foaf:knows ?y .\n" |
| + "}"; |
| ParsedQuery query = new SPARQLParser().parseQuery(text, null); |
| AntecedentVisitor visitor = new AntecedentVisitor(); |
| query.getTupleExpr().visit(visitor); |
| Set<StatementPattern> expected = Sets.newHashSet( |
| new StatementPattern(new Var("x"), c(RDF.TYPE), c(FOAF.PERSON)), |
| new StatementPattern(new Var("y"), c(RDF.TYPE), c(FOAF.PERSON)), |
| new StatementPattern(new Var("x"), c(FOAF.KNOWS), new Var("y"))); |
| Assert.assertEquals(expected, visitor.getAntecedents()); |
| } |
| |
| @Test |
| public void testComplexQuery() throws Exception { |
| String text = "PREFIX foaf: <" + FOAF.NAMESPACE + ">\n" |
| + "PREFIX ex: <" + EX + ">\n" |
| + "SELECT * WHERE {\n" |
| + " { ?x a foaf:Person } UNION {\n" |
| + " GRAPH ex:Graph1 { ?y a foaf:Person }\n" |
| + " } .\n" |
| + " GRAPH ex:Graph2 {\n" |
| + " ?x foaf:knows ?y .\n" |
| + " }\n ." |
| + " OPTIONAL { ?x foaf:mbox ?m } .\n" |
| + " FILTER (?x != ?y) .\n" |
| + "}"; |
| ParsedQuery query = new SPARQLParser().parseQuery(text, null); |
| AntecedentVisitor visitor = new AntecedentVisitor(); |
| query.getTupleExpr().visit(visitor); |
| Set<StatementPattern> expected = Sets.newHashSet( |
| new StatementPattern(Scope.NAMED_CONTEXTS, new Var("y"), c(RDF.TYPE), c(FOAF.PERSON), c(G1)), |
| new StatementPattern(new Var("x"), c(RDF.TYPE), c(FOAF.PERSON)), |
| new StatementPattern(Scope.NAMED_CONTEXTS, new Var("x"), c(FOAF.KNOWS), new Var("y"), c(G2)), |
| new StatementPattern(new Var("x"), c(FOAF.MBOX), new Var("m"))); |
| Assert.assertEquals(expected, visitor.getAntecedents()); |
| } |
| |
| @Test |
| public void testBNodeQuery() throws Exception { |
| String text = "PREFIX foaf: <" + FOAF.NAMESPACE + ">\n" |
| + "SELECT * WHERE {\n" |
| + " ?x a [ rdfs:subClassOf foaf:Person ] .\n" |
| + " ?x foaf:knows ?y .\n" |
| + "}"; |
| ParsedQuery query = new SPARQLParser().parseQuery(text, null); |
| AntecedentVisitor visitor = new AntecedentVisitor(); |
| query.getTupleExpr().visit(visitor); |
| Set<StatementPattern> actual = visitor.getAntecedents(); |
| Assert.assertEquals(3, actual.size()); |
| StatementPattern knows = new StatementPattern(new Var("x"), c(FOAF.KNOWS), new Var("y")); |
| Assert.assertTrue(actual.remove(knows)); |
| Assert.assertTrue(actual.removeIf(sp -> { |
| return sp.getSubjectVar().equals(new Var("x")) |
| && RDF.TYPE.equals(sp.getPredicateVar().getValue()) |
| && sp.getObjectVar().getValue() == null; |
| })); |
| Assert.assertTrue(actual.removeIf(sp -> { |
| return sp.getSubjectVar().getValue() == null |
| && RDFS.SUBCLASSOF.equals(sp.getPredicateVar().getValue()) |
| && FOAF.PERSON.equals(sp.getObjectVar().getValue()); |
| })); |
| } |
| |
| @Test |
| public void testNoSP() throws Exception { |
| String text = "CONSTRUCT {\n" |
| + " owl:Thing a owl:Class ." |
| + " owl:Nothing a owl:Class ." |
| + " owl:Nothing rdfs:subClassOf owl:Thing ." |
| + "} WHERE { }"; |
| ParsedQuery query = new SPARQLParser().parseQuery(text, null); |
| AntecedentVisitor visitor = new AntecedentVisitor(); |
| query.getTupleExpr().visit(visitor); |
| Set<StatementPattern> expected = Sets.newHashSet(); |
| Assert.assertEquals(expected, visitor.getAntecedents()); |
| } |
| } |