| package org.apache.rya.indexing.pcj.matching; |
| /* |
| * 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. |
| */ |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.apache.rya.indexing.external.matching.FlattenedOptional; |
| import org.eclipse.rdf4j.query.MalformedQueryException; |
| import org.eclipse.rdf4j.query.algebra.Filter; |
| import org.eclipse.rdf4j.query.algebra.Join; |
| import org.eclipse.rdf4j.query.algebra.LeftJoin; |
| import org.eclipse.rdf4j.query.algebra.Projection; |
| import org.eclipse.rdf4j.query.algebra.TupleExpr; |
| import org.eclipse.rdf4j.query.parser.ParsedQuery; |
| import org.eclipse.rdf4j.query.parser.sparql.SPARQLParser; |
| import org.junit.Assert; |
| import org.junit.Test; |
| |
| public class FlattenedOptionalTest { |
| |
| @Test |
| public void testBasicOptional() throws MalformedQueryException { |
| |
| String query = ""// |
| + "SELECT ?e ?c ?l" // |
| + "{" // |
| + " ?e a ?c . "// |
| + " ?e <http://www.w3.org/2000/01/rdf-schema#label> ?l "// |
| + " OPTIONAL{?e <uri:talksTo> ?l } . "// |
| + "}";// |
| |
| SPARQLParser parser = new SPARQLParser(); |
| ParsedQuery pq = parser.parseQuery(query, null); |
| List<TupleExpr> joinArgs = getJoinArgs(pq.getTupleExpr(), |
| new ArrayList<TupleExpr>()); |
| FlattenedOptional optional = (FlattenedOptional) joinArgs.get(0); |
| TupleExpr sp1 = joinArgs.get(1); |
| TupleExpr sp2 = joinArgs.get(2); |
| |
| Assert.assertEquals(false, optional.canRemoveTuple(sp2)); |
| Assert.assertEquals(true, optional.canRemoveTuple(sp1)); |
| // System.out.println(joinArgs); |
| |
| } |
| |
| |
| @Test |
| public void testReOrderedBasicOptional() throws MalformedQueryException { |
| |
| String query = ""// |
| + "SELECT ?e ?c ?l" // |
| + "{" // |
| + " ?e a ?c . "// |
| + " OPTIONAL{?e <uri:talksTo> ?l } . "// |
| + " ?e <http://www.w3.org/2000/01/rdf-schema#label> ?l "// |
| + "}";// |
| |
| SPARQLParser parser = new SPARQLParser(); |
| ParsedQuery pq = parser.parseQuery(query, null); |
| System.out.println(pq.getTupleExpr()); |
| List<TupleExpr> joinArgs = getJoinArgs(pq.getTupleExpr(), |
| new ArrayList<TupleExpr>()); |
| // System.out.println(joinArgs); |
| FlattenedOptional optional = (FlattenedOptional) joinArgs.get(0); |
| TupleExpr sp1 = joinArgs.get(1); |
| TupleExpr sp2 = joinArgs.get(2); |
| |
| Assert.assertEquals(false, optional.canRemoveTuple(sp1)); |
| Assert.assertEquals(false, optional.canAddTuple(sp2)); |
| |
| |
| } |
| |
| @Test |
| public void testEqualsAndHashCode() throws MalformedQueryException { |
| |
| String query1 = ""// |
| + "SELECT ?e ?c ?l" // |
| + "{" // |
| + " ?e <uri:worksAt> ?c . "// |
| + " OPTIONAL{?e <uri:talksTo> ?l } . "// |
| + " ?e <http://www.w3.org/2000/01/rdf-schema#label> ?l "// |
| + "}";// |
| |
| SPARQLParser parser = new SPARQLParser(); |
| ParsedQuery pq1 = parser.parseQuery(query1, null); |
| List<TupleExpr> joinArgs1 = getJoinArgs(pq1.getTupleExpr(), |
| new ArrayList<TupleExpr>()); |
| |
| |
| String query2 = ""// |
| + "SELECT ?e ?c ?l" // |
| + "{" // |
| + " ?e a ?c . "// |
| + " ?e <http://www.w3.org/2000/01/rdf-schema#label> ?l "// |
| + " OPTIONAL{?e <uri:talksTo> ?l } . "// |
| + "}";// |
| |
| parser = new SPARQLParser(); |
| ParsedQuery pq2 = parser.parseQuery(query2, null); |
| List<TupleExpr> joinArgs2 = getJoinArgs(pq2.getTupleExpr(), |
| new ArrayList<TupleExpr>()); |
| FlattenedOptional optional1 = (FlattenedOptional) joinArgs1.get(0); |
| FlattenedOptional optional2 = (FlattenedOptional) joinArgs2.get(0); |
| System.out.println(optional1 + " and " + optional2); |
| |
| Assert.assertEquals(optional1, optional2); |
| Assert.assertEquals(optional1.hashCode(), optional2.hashCode()); |
| |
| |
| } |
| |
| |
| private List<TupleExpr> getJoinArgs(TupleExpr tupleExpr, |
| List<TupleExpr> joinArgs) { |
| if (tupleExpr instanceof Projection) { |
| Projection projection = (Projection) tupleExpr; |
| getJoinArgs(projection.getArg(), joinArgs); |
| } else if (tupleExpr instanceof Join) { |
| Join join = (Join) tupleExpr; |
| getJoinArgs(join.getLeftArg(), joinArgs); |
| getJoinArgs(join.getRightArg(), joinArgs); |
| } else if (tupleExpr instanceof LeftJoin) { |
| LeftJoin lj = (LeftJoin) tupleExpr; |
| joinArgs.add(new FlattenedOptional(lj)); |
| getJoinArgs(lj.getLeftArg(), joinArgs); |
| } else if (tupleExpr instanceof Filter) { |
| getJoinArgs(((Filter) tupleExpr).getArg(), joinArgs); |
| } else { |
| joinArgs.add(tupleExpr); |
| } |
| return joinArgs; |
| } |
| |
| } |