| /** |
| * 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.simple; |
| |
| import static org.junit.Assert.assertEquals; |
| |
| import java.nio.charset.StandardCharsets; |
| import java.nio.file.Files; |
| import java.nio.file.Path; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.stream.Stream; |
| |
| import org.apache.commons.rdf.api.Graph; |
| import org.apache.commons.rdf.api.IRI; |
| import org.apache.commons.rdf.api.RDF; |
| import org.apache.commons.rdf.api.Triple; |
| import org.junit.AfterClass; |
| import org.junit.BeforeClass; |
| import org.junit.Test; |
| |
| /** |
| * Test writing graph |
| */ |
| public class TestWritingGraph { |
| |
| /* |
| * 200k triples should do - about 7 MB on disk. Override with |
| * -Dtriples=20000000 to exercise your memory banks. |
| */ |
| private static final long TRIPLES = Long.getLong("triples", 200000L); |
| |
| /** |
| * Run tests with -Dkeepfiles=true to inspect /tmp files * |
| */ |
| private static boolean KEEP_FILES = Boolean.getBoolean("keepfiles"); |
| |
| private static Graph graph; |
| |
| private static RDF factory; |
| |
| @BeforeClass |
| public static void createGraph() throws Exception { |
| factory = new SimpleRDF(); |
| graph = factory.createGraph(); |
| final IRI subject = factory.createIRI("subj"); |
| final IRI predicate = factory.createIRI("pred"); |
| final List<IRI> types = new ArrayList<>(Types.values()); |
| // Ensure we don't try to create a literal with rdf:langString but |
| // without a language tag |
| types.remove(Types.RDF_LANGSTRING); |
| Collections.shuffle(types); |
| for (int i = 0; i < TRIPLES; i++) { |
| if (i % 11 == 0) { |
| graph.add(subject, predicate, factory.createBlankNode("Example " + i)); |
| } else if (i % 5 == 0) { |
| graph.add(subject, predicate, factory.createLiteral("Example " + i, "en")); |
| } else if (i % 3 == 0) { |
| graph.add(subject, predicate, factory.createLiteral("Example " + i, types.get(i % types.size()))); |
| } else { |
| graph.add(subject, predicate, factory.createLiteral("Example " + i)); |
| } |
| } |
| } |
| |
| @AfterClass |
| public static void tearDownClass() throws Exception { |
| graph.clear(); |
| graph = null; |
| } |
| |
| @Test |
| public void createGraphTiming() throws Exception { |
| createGraph(); |
| } |
| |
| @Test |
| public void countQuery() { |
| final IRI subject = factory.createIRI("subj"); |
| final IRI predicate = factory.createIRI("pred"); |
| final long count = graph.stream(subject, predicate, null).unordered().parallel().count(); |
| // System.out.println("Counted - " + count); |
| assertEquals(count, TRIPLES); |
| } |
| |
| public static String tripleAsString(final Triple t) { |
| return t.getSubject().ntriplesString() + " " + t.getPredicate().ntriplesString() + " " |
| + t.getObject().ntriplesString() + " ."; |
| } |
| |
| @Test |
| public void writeGraphFromStream() throws Exception { |
| final Path graphFile = Files.createTempFile("graph", ".nt"); |
| if (KEEP_FILES) { |
| System.out.println("From stream: " + graphFile); |
| } else { |
| graphFile.toFile().deleteOnExit(); |
| } |
| |
| final Stream<CharSequence> stream = graph.stream().map(TestWritingGraph::tripleAsString); |
| Files.write(graphFile, stream::iterator, StandardCharsets.UTF_8); |
| } |
| |
| @Test |
| public void writeGraphFromStreamFiltered() throws Exception { |
| final Path graphFile = Files.createTempFile("graph", ".nt"); |
| if (KEEP_FILES) { |
| System.out.println("Filtered stream: " + graphFile); |
| } else { |
| graphFile.toFile().deleteOnExit(); |
| } |
| |
| final IRI subject = factory.createIRI("subj"); |
| final IRI predicate = factory.createIRI("pred"); |
| final Stream<CharSequence> stream = graph.stream(subject, predicate, null).map(TestWritingGraph::tripleAsString); |
| Files.write(graphFile, stream::iterator, StandardCharsets.UTF_8); |
| |
| } |
| |
| @Test |
| public void writeGraphFromStreamFilteredNoMatches() throws Exception { |
| final Path graphFile = Files.createTempFile("graph-empty-", ".nt"); |
| if (KEEP_FILES) { |
| System.out.println("Filtered stream: " + graphFile); |
| } else { |
| graphFile.toFile().deleteOnExit(); |
| } |
| |
| final IRI subject = factory.createIRI("nonexistent"); |
| final IRI predicate = factory.createIRI("pred"); |
| final Stream<CharSequence> stream = graph.stream(subject, predicate, null).map(Object::toString); |
| Files.write(graphFile, stream::iterator, StandardCharsets.UTF_8); |
| |
| } |
| |
| } |