| /** |
| * 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.commons.rdf.api; |
| |
| import java.util.Arrays; |
| import java.util.Optional; |
| import java.util.stream.Stream; |
| |
| class DummyDataset implements Dataset { |
| |
| boolean streamCalled = false; |
| boolean filteredStreamCalled; |
| |
| @Override |
| public void add(final Quad Quad) { |
| if (! contains(Quad)) { |
| throw new IllegalStateException("DummyDataset can't be modified"); |
| } |
| } |
| |
| @Override |
| public void add(final BlankNodeOrIRI graphName, final BlankNodeOrIRI subject, final IRI predicate, final RDFTerm object) { |
| if (! contains(Optional.ofNullable(graphName), subject, predicate, object)) { |
| throw new IllegalStateException("DummyDataset can't be modified"); |
| } |
| } |
| |
| @Override |
| public boolean contains(final Quad Quad) { |
| return Quad.equals(new DummyQuad()); |
| } |
| |
| @Override |
| public boolean contains(final Optional<BlankNodeOrIRI> graphName, final BlankNodeOrIRI subject, final IRI predicate, final RDFTerm object) { |
| return (graphName == null || ! graphName.isPresent()) && |
| (subject == null || subject.equals(new DummyIRI(1))) && |
| (predicate == null || predicate.equals(new DummyIRI(2))) && |
| (object == null || object.equals(new DummyIRI(3))); |
| } |
| @Override |
| public void remove(final Quad Quad) { |
| if (contains(Quad)) { |
| throw new IllegalStateException("DummyDataset can't be modified"); |
| } |
| } |
| @Override |
| public void remove(final Optional<BlankNodeOrIRI> graphName, final BlankNodeOrIRI subject, final IRI predicate, final RDFTerm object) { |
| if (contains(graphName, subject, predicate, object)) { |
| throw new IllegalStateException("DummyDataset can't be modified"); |
| } |
| } |
| @Override |
| public void clear() { |
| throw new IllegalStateException("DummyDataset can't be modified"); |
| } |
| @Override |
| public long size() { |
| return 1; |
| } |
| @Override |
| public Stream<? extends Quad> stream() { |
| streamCalled = true; |
| return Arrays.asList(new DummyQuad()).stream(); |
| } |
| |
| @Override |
| public Stream<? extends Quad> stream(final Optional<BlankNodeOrIRI> graphName, final BlankNodeOrIRI subject, final IRI predicate, |
| final RDFTerm object) { |
| filteredStreamCalled = true; |
| if (contains(graphName, subject, predicate, object)) { |
| return Stream.of(new DummyQuad()); |
| } |
| return Stream.empty(); |
| } |
| |
| @Override |
| public Graph getGraph() { |
| return new DummyGraph(); |
| } |
| |
| @Override |
| public Optional<Graph> getGraph(final BlankNodeOrIRI graphName) { |
| if (graphName == null) { |
| return Optional.of(getGraph()); |
| } |
| return Optional.empty(); |
| } |
| |
| @Override |
| public Stream<BlankNodeOrIRI> getGraphNames() { |
| return Stream.empty(); |
| } |
| } |