| /* |
| * 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.api.function.filter; |
| |
| import static java.util.Objects.requireNonNull; |
| import static org.junit.Assert.assertFalse; |
| import static org.junit.Assert.assertTrue; |
| |
| import java.util.concurrent.atomic.AtomicReference; |
| |
| import org.apache.rya.api.function.filter.FilterEvaluator; |
| import org.apache.rya.api.model.VisibilityBindingSet; |
| import org.junit.Test; |
| import org.openrdf.model.ValueFactory; |
| import org.openrdf.model.impl.ValueFactoryImpl; |
| import org.openrdf.query.algebra.Filter; |
| import org.openrdf.query.algebra.helpers.QueryModelVisitorBase; |
| import org.openrdf.query.impl.MapBindingSet; |
| import org.openrdf.query.parser.ParsedQuery; |
| import org.openrdf.query.parser.sparql.SPARQLParser; |
| |
| import edu.umd.cs.findbugs.annotations.Nullable; |
| |
| /** |
| * Unit tests the methods of {@link FilterEvaluator}. |
| */ |
| public class FilterEvaluatorTest { |
| |
| @Test |
| public void matches() throws Exception { |
| // Read the filter object from a SPARQL query. |
| final Filter filter = getFilter( |
| "SELECT * " + |
| "WHERE { " + |
| "FILTER(?age < 10)" + |
| "?person <urn:age> ?age " + |
| "}"); |
| |
| // Create the input binding set. |
| final ValueFactory vf = new ValueFactoryImpl(); |
| final MapBindingSet bs = new MapBindingSet(); |
| bs.addBinding("person", vf.createURI("urn:Alice")); |
| bs.addBinding("age", vf.createLiteral(9)); |
| final VisibilityBindingSet visBs = new VisibilityBindingSet(bs); |
| |
| // Test the evaluator. |
| assertTrue( FilterEvaluator.make(filter).filter(visBs) ); |
| } |
| |
| @Test |
| public void doesNotMatch() throws Exception { |
| // Read the filter object from a SPARQL query. |
| final Filter filter = getFilter( |
| "SELECT * " + |
| "WHERE { " + |
| "FILTER(?age < 10)" + |
| "?person <urn:age> ?age " + |
| "}"); |
| |
| // Create the input binding set. |
| final ValueFactory vf = new ValueFactoryImpl(); |
| final MapBindingSet bs = new MapBindingSet(); |
| bs.addBinding("person", vf.createURI("urn:Alice")); |
| bs.addBinding("age", vf.createLiteral(11)); |
| final VisibilityBindingSet visBs = new VisibilityBindingSet(bs); |
| |
| // Test the evaluator. |
| assertFalse( FilterEvaluator.make(filter).filter(visBs) ); |
| } |
| |
| /** |
| * Get the first {@link Filter} node from a SPARQL query. |
| * |
| * @param sparql - The query that contains a single Projection node. |
| * @return The first {@link Filter} that is encountered. |
| * @throws Exception The query could not be parsed. |
| */ |
| public static @Nullable Filter getFilter(final String sparql) throws Exception { |
| requireNonNull(sparql); |
| |
| final AtomicReference<Filter> filter = new AtomicReference<>(); |
| final ParsedQuery parsed = new SPARQLParser().parseQuery(sparql, null); |
| parsed.getTupleExpr().visit(new QueryModelVisitorBase<Exception>() { |
| @Override |
| public void meet(final Filter node) throws Exception { |
| filter.set(node); |
| } |
| }); |
| |
| return filter.get(); |
| } |
| } |