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Posted to commits@commonsrdf.apache.org by st...@apache.org on 2016/09/28 13:52:26 UTC
[34/36] incubator-commonsrdf git commit: COMMONSRDF-39 experimental
RDFParser interface
http://git-wip-us.apache.org/repos/asf/incubator-commonsrdf/blob/10d27cde/simple/src/main/java/org/apache/commons/rdf/simple/experimental/AbstractRDFParser.java
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diff --git a/simple/src/main/java/org/apache/commons/rdf/simple/experimental/AbstractRDFParser.java b/simple/src/main/java/org/apache/commons/rdf/simple/experimental/AbstractRDFParser.java
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--- /dev/null
+++ b/simple/src/main/java/org/apache/commons/rdf/simple/experimental/AbstractRDFParser.java
@@ -0,0 +1,542 @@
+/**
+ * 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.experimental;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URI;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.Optional;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Future;
+import java.util.function.Consumer;
+
+import org.apache.commons.rdf.api.Dataset;
+import org.apache.commons.rdf.api.Graph;
+import org.apache.commons.rdf.api.IRI;
+import org.apache.commons.rdf.api.Quad;
+import org.apache.commons.rdf.api.RDFSyntax;
+import org.apache.commons.rdf.api.RDFTermFactory;
+import org.apache.commons.rdf.experimental.RDFParser;
+import org.apache.commons.rdf.simple.SimpleRDFTermFactory;
+
+/**
+ * Abstract RDFParser
+ * <p>
+ * This abstract class keeps the properties in protected fields like
+ * {@link #sourceFile} using {@link Optional}. Some basic checking like
+ * {@link #checkIsAbsolute(IRI)} is performed.
+ * <p>
+ * This class and its subclasses are {@link Cloneable}, immutable and
+ * (therefore) thread-safe - each call to option methods like
+ * {@link #contentType(String)} or {@link #source(IRI)} will return a cloned,
+ * mutated copy.
+ * <p>
+ * By default, parsing is done by the abstract method
+ * {@link #parseSynchronusly()} - which is executed in a cloned snapshot - hence
+ * multiple {@link #parse()} calls are thread-safe. The default {@link #parse()}
+ * uses a thread pool in {@link #threadGroup} - but implementations can override
+ * {@link #parse()} (e.g. because it has its own threading model or use
+ * asynchronous remote execution).
+ */
+public abstract class AbstractRDFParser<T extends AbstractRDFParser<T>>
+ implements RDFParser, Cloneable {
+
+ public static final ThreadGroup threadGroup = new ThreadGroup("Commons RDF parsers");
+ private static final ExecutorService threadpool = Executors.newCachedThreadPool(r -> new Thread(threadGroup, r));
+
+ // Basically only used for creating IRIs
+ private static RDFTermFactory internalRdfTermFactory = new SimpleRDFTermFactory();
+
+ /**
+ * Get the set {@link RDFTermFactory}, if any.
+ */
+ public Optional<RDFTermFactory> getRdfTermFactory() {
+ return rdfTermFactory;
+ }
+
+ /**
+ * Get the set content-type {@link RDFSyntax}, if any.
+ * <p>
+ * If this is {@link Optional#isPresent()}, then
+ * {@link #getContentType()} contains the
+ * value of {@link RDFSyntax#mediaType}.
+ */
+ public Optional<RDFSyntax> getContentTypeSyntax() {
+ return contentTypeSyntax;
+ }
+
+ /**
+ * Get the set content-type String, if any.
+ * <p>
+ * If this is {@link Optional#isPresent()} and
+ * is recognized by {@link RDFSyntax#byMediaType(String)}, then
+ * the corresponding {@link RDFSyntax} is set on
+ * {@link #getContentType()}, otherwise that is
+ * {@link Optional#empty()}.
+ */
+ public final Optional<String> getContentType() {
+ return contentType;
+ }
+
+ /**
+ * Get the target to consume parsed Quads.
+ * <p>
+ * From the call to {@link #parseSynchronusly()}, this
+ * method is always {@link Optional#isPresent()}.
+ *
+ */
+ public Consumer<Quad> getTarget() {
+ return target;
+ }
+
+ /**
+ * Get the target dataset as set by {@link #target(Dataset)}.
+ * <p>
+ * The return value is {@link Optional#isPresent()} if and only if
+ * {@link #target(Dataset)} has been set, meaning that the implementation
+ * may choose to append parsed quads to the {@link Dataset} directly instead
+ * of relying on the generated {@link #getTarget()} consumer.
+ * <p>
+ * If this value is present, then {@link #getTargetGraph()} MUST
+ * be {@link Optional#empty()}.
+ *
+ * @return The target Dataset, or {@link Optional#empty()} if another kind of target has been set.
+ */
+ public Optional<Dataset> getTargetDataset() {
+ return targetDataset;
+ }
+
+ /**
+ * Get the target graph as set by {@link #target(Graph)}.
+ * <p>
+ * The return value is {@link Optional#isPresent()} if and only if
+ * {@link #target(Graph)} has been set, meaning that the implementation
+ * may choose to append parsed triples to the {@link Graph} directly instead
+ * of relying on the generated {@link #getTarget()} consumer.
+ * <p>
+ * If this value is present, then {@link #getTargetDataset()} MUST
+ * be {@link Optional#empty()}.
+ *
+ * @return The target Graph, or {@link Optional#empty()} if another kind of target has been set.
+ */
+ public Optional<Graph> getTargetGraph() {
+ return targetGraph;
+ }
+
+ /**
+ * Get the set base {@link IRI}, if present.
+ * <p>
+ *
+ */
+ public Optional<IRI> getBase() {
+ return base;
+ }
+
+ /**
+ * Get the set source {@link InputStream}.
+ * <p>
+ * If this is {@link Optional#isPresent()}, then
+ * {@link #getSourceFile()} and {@link #getSourceIri()}
+ * are {@link Optional#empty()}.
+ */
+ public Optional<InputStream> getSourceInputStream() {
+ return sourceInputStream;
+ }
+
+ /**
+ * Get the set source {@link Path}.
+ * <p>
+ * If this is {@link Optional#isPresent()}, then
+ * {@link #getSourceInputStream()} and {@link #getSourceIri()}
+ * are {@link Optional#empty()}.
+ */
+ public Optional<Path> getSourceFile() {
+ return sourceFile;
+ }
+
+ /**
+ * Get the set source {@link Path}.
+ * <p>
+ * If this is {@link Optional#isPresent()}, then
+ * {@link #getSourceInputStream()} and {@link #getSourceInputStream()()}
+ * are {@link Optional#empty()}.
+ */
+ public Optional<IRI> getSourceIri() {
+ return sourceIri;
+ }
+
+
+ private Optional<RDFTermFactory> rdfTermFactory = Optional.empty();
+ private Optional<RDFSyntax> contentTypeSyntax = Optional.empty();
+ private Optional<String> contentType = Optional.empty();
+ private Optional<IRI> base = Optional.empty();
+ private Optional<InputStream> sourceInputStream = Optional.empty();
+ private Optional<Path> sourceFile = Optional.empty();
+ private Optional<IRI> sourceIri = Optional.empty();
+ private Consumer<Quad> target;
+ private Optional<Dataset> targetDataset;
+ private Optional<Graph> targetGraph;
+
+ @SuppressWarnings("unchecked")
+ @Override
+ public T clone() {
+ try {
+ return (T) super.clone();
+ } catch (CloneNotSupportedException e) {
+ throw new RuntimeException(e);
+ }
+ }
+
+ @SuppressWarnings("unchecked")
+ protected T asT() {
+ return (T) this;
+ }
+
+ @Override
+ public T rdfTermFactory(RDFTermFactory rdfTermFactory) {
+ AbstractRDFParser<T> c = clone();
+ c.rdfTermFactory = Optional.ofNullable(rdfTermFactory);
+ return c.asT();
+ }
+
+ @Override
+ public T contentType(RDFSyntax rdfSyntax) throws IllegalArgumentException {
+ AbstractRDFParser<T> c = clone();
+ c.contentTypeSyntax = Optional.ofNullable(rdfSyntax);
+ c.contentType = c.contentTypeSyntax.map(syntax -> syntax.mediaType);
+ return c.asT();
+ }
+
+ @Override
+ public T contentType(String contentType) throws IllegalArgumentException {
+ AbstractRDFParser<T> c = clone();
+ c.contentType = Optional.ofNullable(contentType);
+ c.contentTypeSyntax = c.contentType.flatMap(RDFSyntax::byMediaType);
+ return c.asT();
+ }
+
+ @Override
+ public T base(IRI base) {
+ AbstractRDFParser<T> c = clone();
+ c.base = Optional.ofNullable(base);
+ c.base.ifPresent(i -> checkIsAbsolute(i));
+ return c.asT();
+ }
+
+ @Override
+ public T base(String base) throws IllegalArgumentException {
+ return base(internalRdfTermFactory.createIRI(base));
+ }
+
+ @Override
+ public T source(InputStream inputStream) {
+ AbstractRDFParser<T> c = clone();
+ c.resetSource();
+ c.sourceInputStream = Optional.ofNullable(inputStream);
+ return c.asT();
+ }
+
+ @Override
+ public T source(Path file) {
+ AbstractRDFParser<T> c = clone();
+ c.resetSource();
+ c.sourceFile = Optional.ofNullable(file);
+ return c.asT();
+ }
+
+ @Override
+ public T source(IRI iri) {
+ AbstractRDFParser<T> c = clone();
+ c.resetSource();
+ c.sourceIri = Optional.ofNullable(iri);
+ c.sourceIri.ifPresent(i -> checkIsAbsolute(i));
+ return c.asT();
+ }
+
+ @Override
+ public T source(String iri) throws IllegalArgumentException {
+ AbstractRDFParser<T> c = clone();
+ c.resetSource();
+ c.sourceIri = Optional.ofNullable(iri).map(internalRdfTermFactory::createIRI);
+ c.sourceIri.ifPresent(i -> checkIsAbsolute(i));
+ return source(internalRdfTermFactory.createIRI(iri));
+ }
+
+ /**
+ * Check if an iri is absolute.
+ * <p>
+ * Used by {@link #source(String)} and {@link #base(String)}
+ *
+ * @param iri
+ */
+ protected void checkIsAbsolute(IRI iri) {
+ if (!URI.create(iri.getIRIString()).isAbsolute()) {
+ throw new IllegalArgumentException("IRI is not absolute: " + iri);
+ }
+ }
+
+ /**
+ * Check that one and only one source is present and valid.
+ * <p>
+ * Used by {@link #parse()}.
+ * <p>
+ * Subclasses might override this method, e.g. to support other
+ * source combinations, or to check if the sourceIri is
+ * resolvable.
+ *
+ * @throws IOException If a source file can't be read
+ */
+ protected void checkSource() throws IOException {
+ if (!sourceFile.isPresent() && !sourceInputStream.isPresent() && !sourceIri.isPresent()) {
+ throw new IllegalStateException("No source has been set");
+ }
+ if (sourceIri.isPresent() && sourceInputStream.isPresent()) {
+ throw new IllegalStateException("Both sourceIri and sourceInputStream have been set");
+ }
+ if (sourceIri.isPresent() && sourceFile.isPresent()) {
+ throw new IllegalStateException("Both sourceIri and sourceFile have been set");
+ }
+ if (sourceInputStream.isPresent() && sourceFile.isPresent()) {
+ throw new IllegalStateException("Both sourceInputStream and sourceFile have been set");
+ }
+ if (sourceFile.isPresent() && !sourceFile.filter(Files::isReadable).isPresent()) {
+ throw new IOException("Can't read file: " + sourceFile);
+ }
+ }
+
+ /**
+ * Check if base is required.
+ *
+ * @throws IllegalStateException if base is required, but not set.
+ */
+ protected void checkBaseRequired() {
+ if (!base.isPresent() && sourceInputStream.isPresent()
+ && !contentTypeSyntax.filter(t -> t == RDFSyntax.NQUADS || t == RDFSyntax.NTRIPLES).isPresent()) {
+ throw new IllegalStateException("base iri required for inputstream source");
+ }
+ }
+
+ /**
+ * Reset all source* fields to Optional.empty()
+ * <p>
+ * Subclasses should override this and call <code>super.resetSource()</code>
+ * if they need to reset any additional source* fields.
+ *
+ */
+ protected void resetSource() {
+ sourceInputStream = Optional.empty();
+ sourceIri = Optional.empty();
+ sourceFile = Optional.empty();
+ }
+
+
+ /**
+ * Reset all optional target* fields to Optional.empty()</code>
+ * <p>
+ * Note that the consumer set for {@link #getTarget()} is
+ * NOT reset.
+ * <p>
+ * Subclasses should override this and call <code>super.resetTarget()</code>
+ * if they need to reset any additional target* fields.
+ *
+ */
+ protected void resetTarget() {
+ targetDataset = Optional.empty();
+ targetGraph = Optional.empty();
+ }
+
+ /**
+ * Parse {@link #sourceInputStream}, {@link #sourceFile} or
+ * {@link #sourceIri}.
+ * <p>
+ * One of the source fields MUST be present, as checked by {@link #checkSource()}.
+ * <p>
+ * {@link #checkBaseRequired()} is called to verify if {@link #getBase()} is required.
+ *
+ * @throws IOException If the source could not be read
+ * @throws RDFParseException If the source could not be parsed (e.g. a .ttl file was not valid Turtle)
+ */
+ protected abstract void parseSynchronusly() throws IOException, RDFParseException;
+
+ /**
+ * Prepare a clone of this RDFParser which have been checked and
+ * completed.
+ * <p>
+ * The returned clone will always have
+ * {@link #getTarget()} and {@link #getRdfTermFactory()} present.
+ * <p>
+ * If the {@link #getSourceFile()} is present, but the
+ * {@link #getBase()} is not present, the base will be set to the
+ * <code>file:///</code> IRI for the Path's real path (e.g. resolving any
+ * symbolic links).
+ *
+ * @return A completed and checked clone of this RDFParser
+ * @throws IOException If the source was not accessible (e.g. a file was not found)
+ * @throws IllegalStateException If the parser was not in a compatible setting (e.g. contentType was an invalid string)
+ */
+ protected T prepareForParsing() throws IOException, IllegalStateException {
+ checkSource();
+ checkBaseRequired();
+ checkContentType();
+ checkTarget();
+
+ // We'll make a clone of our current state which will be passed to
+ // parseSynchronously()
+ AbstractRDFParser<T> c = clone();
+
+ // Use a fresh SimpleRDFTermFactory for each parse
+ if (!c.rdfTermFactory.isPresent()) {
+ c.rdfTermFactory = Optional.of(createRDFTermFactory());
+ }
+ // sourceFile, but no base? Let's follow any symlinks and use
+ // the file:/// URI
+ if (c.sourceFile.isPresent() && !c.base.isPresent()) {
+ URI baseUri = c.sourceFile.get().toRealPath().toUri();
+ c.base = Optional.of(internalRdfTermFactory.createIRI(baseUri.toString()));
+ }
+
+ return c.asT();
+ }
+
+ /**
+ * Subclasses can override this method to check the target is
+ * valid.
+ * <p>
+ * The default implementation throws an IllegalStateException if the
+ * target has not been set.
+ */
+ protected void checkTarget() {
+ if (target == null) {
+ throw new IllegalStateException("target has not been set");
+ }
+ if (targetGraph.isPresent() && targetDataset.isPresent()) {
+ // This should not happen as each target(..) method resets the optionals
+ throw new IllegalStateException("targetGraph and targetDataset can't both be set");
+ }
+ }
+
+ /**
+ * Subclasses can override this method to check compatibility with the
+ * contentType setting.
+ *
+ * @throws IllegalStateException
+ * if the {@link #getContentType()} or
+ * {@link #getContentTypeSyntax()} is not compatible or invalid
+ */
+ protected void checkContentType() throws IllegalStateException {
+ }
+
+ /**
+ * Guess RDFSyntax from a local file's extension.
+ * <p>
+ * This method can be used by subclasses if {@link #getContentType()} is not
+ * present and {@link #getSourceFile()} is set.
+ *
+ * @param path Path which extension should be checked
+ * @return The {@link RDFSyntax} which has a matching {@link RDFSyntax#fileExtension},
+ * otherwise {@link Optional#empty()}.
+ */
+ protected static Optional<RDFSyntax> guessRDFSyntax(Path path) {
+ return fileExtension(path).flatMap(RDFSyntax::byFileExtension);
+ }
+
+ /**
+ * Return the file extension of a Path - if any.
+ * <p>
+ * The returned file extension includes the leading <code>.</code>
+ * <p>
+ * Note that this only returns the last extension, e.g. the
+ * file extension for <code>archive.tar.gz</code> would be <code>.gz</code>
+ *
+ * @param path Path which filename might contain an extension
+ * @return File extension (including the leading <code>.</code>,
+ * or {@link Optional#empty()} if the path has no extension
+ */
+ private static Optional<String> fileExtension(Path path) {
+ Path fileName = path.getFileName();
+ if (fileName == null) {
+ return Optional.empty();
+ }
+ String filenameStr = fileName.toString();
+ int last = filenameStr.lastIndexOf(".");
+ if (last > -1) {
+ return Optional.of(filenameStr.substring(last));
+ }
+ return Optional.empty();
+ }
+
+
+ /**
+ * Create a new {@link RDFTermFactory} for a parse session.
+ * <p>
+ * This is called by {@link #parse()} to set
+ * {@link #rdfTermFactory(RDFTermFactory)} if it is
+ * {@link Optional#empty()}.
+ * <p>
+ * As parsed blank nodes might be made with
+ * {@link RDFTermFactory#createBlankNode(String)},
+ * each call to this method SHOULD return
+ * a new RDFTermFactory instance.
+ *
+ * @return A new {@link RDFTermFactory}
+ */
+ protected RDFTermFactory createRDFTermFactory() {
+ return new SimpleRDFTermFactory();
+ }
+
+ @Override
+ public Future<ParseResult> parse() throws IOException, IllegalStateException {
+ final AbstractRDFParser<T> c = prepareForParsing();
+ return threadpool.submit(() -> {
+ c.parseSynchronusly();
+ return null;
+ });
+ }
+
+ @Override
+ public T target(Consumer<Quad> consumer) {
+ AbstractRDFParser<T> c = clone();
+ c.resetTarget();
+ c.target = consumer;
+ return c.asT();
+ }
+
+ @Override
+ public T target(Dataset dataset) {
+ @SuppressWarnings({ "rawtypes", "unchecked" })
+ AbstractRDFParser<T> c = (AbstractRDFParser) RDFParser.super.target(dataset);
+ c.resetTarget();
+ c.targetDataset = Optional.of(dataset);
+ return c.asT();
+ }
+
+ @Override
+ public T target(Graph graph) {
+ @SuppressWarnings({ "rawtypes", "unchecked" }) // super calls our .clone()
+ AbstractRDFParser<T> c = (AbstractRDFParser) RDFParser.super.target(graph);
+ c.resetTarget();
+ c.targetGraph = Optional.of(graph);
+ return c.asT();
+ }
+
+
+
+}
http://git-wip-us.apache.org/repos/asf/incubator-commonsrdf/blob/10d27cde/simple/src/main/java/org/apache/commons/rdf/simple/experimental/RDFParseException.java
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diff --git a/simple/src/main/java/org/apache/commons/rdf/simple/experimental/RDFParseException.java b/simple/src/main/java/org/apache/commons/rdf/simple/experimental/RDFParseException.java
new file mode 100644
index 0000000..cb3ad82
--- /dev/null
+++ b/simple/src/main/java/org/apache/commons/rdf/simple/experimental/RDFParseException.java
@@ -0,0 +1,50 @@
+/**
+ * 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.experimental;
+
+import org.apache.commons.rdf.experimental.RDFParser;
+
+public class RDFParseException extends Exception {
+ private static final long serialVersionUID = 5427752643780702976L;
+ private RDFParser builder;
+
+ public RDFParseException(RDFParser builder) {
+ super();
+ this.builder = builder;
+ }
+
+ public RDFParseException(RDFParser builder, String message, Throwable cause) {
+ super(message, cause);
+ this.builder = builder;
+ }
+
+ public RDFParseException(RDFParser builder, String message) {
+ super(message);
+ this.builder = builder;
+ }
+
+ public RDFParseException(RDFParser builder, Throwable cause) {
+ super(cause);
+ this.builder = builder;
+ }
+
+ public RDFParser getRDFParserBuilder() {
+ return builder;
+ }
+}
\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/incubator-commonsrdf/blob/10d27cde/simple/src/main/java/org/apache/commons/rdf/simple/experimental/package-info.java
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diff --git a/simple/src/main/java/org/apache/commons/rdf/simple/experimental/package-info.java b/simple/src/main/java/org/apache/commons/rdf/simple/experimental/package-info.java
new file mode 100644
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--- /dev/null
+++ b/simple/src/main/java/org/apache/commons/rdf/simple/experimental/package-info.java
@@ -0,0 +1,34 @@
+/*
+ * 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.
+ */
+/**
+ * Experimental Commons RDF Simple implementations.
+ * <p>
+ * Classes in this package should be considered <strong>at
+ * risk</strong>; they might change or be removed in the next minor update of
+ * Commons RDF.
+ * <p>
+ * When a class has stabilized, it will move to the
+ * {@link org.apache.commons.rdf.simple} package.
+ * <p>
+ * <ul>
+ * <li>{@link AbstractRDFParser} - an abstract helper class
+ * for implementations of
+ * {@link org.apache.commons.rdf.api.experimental.RDFParser}.</li>
+ * </ul>
+ */
+package org.apache.commons.rdf.simple.experimental;
\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/incubator-commonsrdf/blob/10d27cde/simple/src/test/java/org/apache/commons/rdf/simple/AbstractRDFParserBuilderTest.java
----------------------------------------------------------------------
diff --git a/simple/src/test/java/org/apache/commons/rdf/simple/AbstractRDFParserBuilderTest.java b/simple/src/test/java/org/apache/commons/rdf/simple/AbstractRDFParserBuilderTest.java
deleted file mode 100644
index 439bacb..0000000
--- a/simple/src/test/java/org/apache/commons/rdf/simple/AbstractRDFParserBuilderTest.java
+++ /dev/null
@@ -1,253 +0,0 @@
-/**
- * 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 static org.junit.Assert.assertFalse;
-import static org.junit.Assert.assertNull;
-import static org.junit.Assert.assertTrue;
-
-import java.io.ByteArrayInputStream;
-import java.io.IOException;
-import java.io.InputStream;
-import java.nio.file.Files;
-import java.nio.file.Path;
-import java.util.concurrent.TimeUnit;
-
-import org.apache.commons.rdf.api.Graph;
-import org.apache.commons.rdf.api.IRI;
-import org.apache.commons.rdf.api.Literal;
-import org.apache.commons.rdf.api.RDFParserBuilder;
-import org.apache.commons.rdf.api.RDFSyntax;
-import org.apache.commons.rdf.api.RDFTerm;
-import org.apache.commons.rdf.api.RDFTermFactory;
-import org.apache.commons.rdf.api.Triple;
-import org.junit.After;
-import org.junit.Before;
-import org.junit.Rule;
-import org.junit.Test;
-import org.junit.rules.ExpectedException;
-
-public class AbstractRDFParserBuilderTest {
-
- private RDFTermFactory factory = new SimpleRDFTermFactory();
-
- private DummyRDFParserBuilder dummyParser = new DummyRDFParserBuilder();
- private Path testNt;
- private Path testTtl;
- private Path testXml;
-
- @Before
- public void createTempFile() throws IOException {
- testNt = Files.createTempFile("test", ".nt");
- testTtl = Files.createTempFile("test", ".ttl");
- testXml = Files.createTempFile("test", ".xml");
-
- // No need to populate the files as the dummy parser
- // doesn't actually read anything
- }
-
- @After
- public void deleteTempFiles() throws IOException {
- Files.deleteIfExists(testNt);
- Files.deleteIfExists(testTtl);
- Files.deleteIfExists(testXml);
- }
-
- @Test
- public void guessRDFSyntax() throws Exception {
- assertEquals(RDFSyntax.NTRIPLES, AbstractRDFParserBuilder.guessRDFSyntax(testNt).get());
- assertEquals(RDFSyntax.TURTLE, AbstractRDFParserBuilder.guessRDFSyntax(testTtl).get());
- assertFalse(AbstractRDFParserBuilder.guessRDFSyntax(testXml).isPresent());
- }
-
- private void checkGraph(Graph g) throws Exception {
- assertTrue(g.size() > 0);
- IRI greeting = factory.createIRI("http://example.com/greeting");
- // Should only have parsed once!
- assertEquals(1, g.getTriples(null, greeting, null).count());
- Triple triple = g.getTriples(null, greeting, null).findAny().get();
- assertTrue(triple.getSubject() instanceof IRI);
- IRI parsing = (IRI) triple.getSubject();
- assertTrue(parsing.getIRIString().startsWith("urn:uuid:"));
-
- assertEquals("http://example.com/greeting", triple.getPredicate().getIRIString());
-
- assertTrue(triple.getObject() instanceof Literal);
- Literal literal = (Literal) triple.getObject();
- assertEquals("Hello world", literal.getLexicalForm());
- assertFalse(literal.getLanguageTag().isPresent());
- assertEquals(Types.XSD_STRING, literal.getDatatype());
-
- // Check uniqueness of properties that are always present
- assertEquals(1,
- g.getTriples(null, factory.createIRI("http://example.com/source"), null).count());
-
- // Check optional properties that are unique
- assertTrue(2 > g.getTriples(null, factory.createIRI("http://example.com/base"), null).count());
- assertTrue(2 > g.getTriples(null, factory.createIRI("http://example.com/contentType"), null).count());
- assertTrue(2 > g.getTriples(null, factory.createIRI("http://example.com/contentTypeSyntax"), null).count());
- }
-
- @Test
- public void parseFile() throws Exception {
- Graph g = factory.createGraph();
- RDFParserBuilder parser = dummyParser.source(testNt).target(g);
- parser.parse().get(5, TimeUnit.SECONDS);
- checkGraph(g);
- // FIXME: this could potentially break if the equivalent of /tmp includes
- // international characters
- assertEquals("<" + testNt.toUri().toString() + ">", firstPredicate(g, "source"));
- // Should be set to the file path
- assertEquals("<" + testNt.toUri().toString() + ">", firstPredicate(g, "base"));
-
- // Should NOT have guessed the content type
- assertNull(firstPredicate(g, "contentType"));
- assertNull(firstPredicate(g, "contentTypeSyntax"));
- }
-
-
- @Test
- public void parseNoSource() throws Exception {
- thrown.expect(IllegalStateException.class);
- dummyParser.parse();
- }
-
- @Test
- public void parseBaseAndContentTypeNoSource() throws Exception {
- // Can set the other options, even without source()
- IRI base = dummyParser.createRDFTermFactory().createIRI("http://www.example.org/test.rdf");
- RDFParserBuilder parser = dummyParser.base(base).contentType(RDFSyntax.RDFXML);
- thrown.expect(IllegalStateException.class);
- thrown.expectMessage("No source has been set");
- // but .parse() should fail
- parser.parse();
- }
-
- @Test
- public void parseFileMissing() throws Exception {
- Files.delete(testNt);
- // This should not fail yet
- RDFParserBuilder parser = dummyParser.source(testNt);
- // but here:
- thrown.expect(IOException.class);
- parser.parse();
- }
-
-
- @Test
- public void parseFileContentType() throws Exception {
- Graph g = factory.createGraph();
- RDFParserBuilder parser = dummyParser
- .source(testNt)
- .contentType(RDFSyntax.NTRIPLES)
- .target(g);
- parser.parse().get(5, TimeUnit.SECONDS);
- checkGraph(g);
- // FIXME: this could potentially break if the equivalent of /tmp includes
- // international characters
- assertEquals("<" + testNt.toUri().toString() + ">", firstPredicate(g, "source"));
- assertEquals("<" + testNt.toUri().toString() + ">", firstPredicate(g, "base"));
- assertEquals("\"NTRIPLES\"", firstPredicate(g, "contentTypeSyntax"));
- assertEquals("\"application/n-triples\"", firstPredicate(g, "contentType"));
- }
-
- private String firstPredicate(Graph g, String pred) {
- return g.getTriples(null, factory.createIRI("http://example.com/" + pred), null)
- .map(Triple::getObject).map(RDFTerm::ntriplesString).findAny().orElse(null);
- }
-
-
- @Rule
- public ExpectedException thrown = ExpectedException.none();
-
- @Test
- public void parseInputStreamFailsIfBaseMissing() throws Exception {
- InputStream inputStream = new ByteArrayInputStream(new byte[0]);
- // Should not fail at this point
- RDFParserBuilder parser = dummyParser.source(inputStream);
- // but here:
- thrown.expect(IllegalStateException.class);
- thrown.expectMessage("base iri required for inputstream source");
- parser.parse();
- }
-
- @Test
- public void parseInputStreamWithBase() throws Exception {
- InputStream inputStream = new ByteArrayInputStream(new byte[0]);
- IRI base = dummyParser.createRDFTermFactory().createIRI("http://www.example.org/test.rdf");
- Graph g = factory.createGraph();
- RDFParserBuilder parser = dummyParser.source(inputStream).base(base).target(g);
- parser.parse().get(5, TimeUnit.SECONDS);
- checkGraph(g);
- assertEquals("<http://www.example.org/test.rdf>", firstPredicate(g, "base"));
- // in our particular debug output,
- // bnode source indicates InputStream
- assertTrue(firstPredicate(g, "source").startsWith("_:"));
- assertNull(firstPredicate(g, "contentType"));
- assertNull(firstPredicate(g, "contentTypeSyntax"));
- }
-
- @Test
- public void parseInputStreamWithNQuads() throws Exception {
- InputStream inputStream = new ByteArrayInputStream(new byte[0]);
- Graph g = factory.createGraph();
- RDFParserBuilder parser = dummyParser.source(inputStream).contentType(RDFSyntax.NQUADS).target(g);
- parser.parse().get(5, TimeUnit.SECONDS);
- checkGraph(g);
- assertNull(firstPredicate(g, "base"));
- // in our particular debug output,
- // bnode source indicates InputStream
- assertTrue(firstPredicate(g, "source").startsWith("_:"));
- assertEquals("\"application/n-quads\"", firstPredicate(g, "contentType"));
- assertEquals("\"NQUADS\"", firstPredicate(g, "contentTypeSyntax"));
- }
-
- @Test
- public void parseIRI() throws Exception {
- IRI iri = dummyParser.createRDFTermFactory().createIRI("http://www.example.net/test.ttl");
- Graph g = factory.createGraph();
- RDFParserBuilder parser = dummyParser.source(iri).target(g);
- parser.parse().get(5, TimeUnit.SECONDS);
- checkGraph(g);
- assertEquals("<http://www.example.net/test.ttl>", firstPredicate(g, "source"));
- // No base - assuming the above IRI is always
- // the base would break server-supplied base from
- // any HTTP Location redirects and Content-Location header
- assertNull(firstPredicate(g, "base"));
- // ".ttl" in IRI string does not imply any content type
- assertNull(firstPredicate(g, "contentType"));
- assertNull(firstPredicate(g, "contentTypeSyntax"));
-
- }
-
- @Test
- public void parseIRIBaseContentType() throws Exception {
- IRI iri = dummyParser.createRDFTermFactory().createIRI("http://www.example.net/test.ttl");
- Graph g = factory.createGraph();
- RDFParserBuilder parser = dummyParser.source(iri).base(iri).contentType(RDFSyntax.TURTLE).target(g);
- parser.parse().get(5, TimeUnit.SECONDS);
- checkGraph(g);
- assertEquals("<http://www.example.net/test.ttl>", firstPredicate(g, "source"));
- assertEquals("<http://www.example.net/test.ttl>", firstPredicate(g, "base"));
- assertEquals("\"TURTLE\"", firstPredicate(g, "contentTypeSyntax"));
- assertEquals("\"text/turtle\"", firstPredicate(g, "contentType"));
- }
-
-
-}
http://git-wip-us.apache.org/repos/asf/incubator-commonsrdf/blob/10d27cde/simple/src/test/java/org/apache/commons/rdf/simple/DummyRDFParserBuilder.java
----------------------------------------------------------------------
diff --git a/simple/src/test/java/org/apache/commons/rdf/simple/DummyRDFParserBuilder.java b/simple/src/test/java/org/apache/commons/rdf/simple/DummyRDFParserBuilder.java
index baf9768..683ef7b 100644
--- a/simple/src/test/java/org/apache/commons/rdf/simple/DummyRDFParserBuilder.java
+++ b/simple/src/test/java/org/apache/commons/rdf/simple/DummyRDFParserBuilder.java
@@ -23,18 +23,20 @@ import java.util.function.Consumer;
import org.apache.commons.rdf.api.IRI;
import org.apache.commons.rdf.api.Quad;
-import org.apache.commons.rdf.api.RDFParserBuilder;
import org.apache.commons.rdf.api.RDFTermFactory;
+import org.apache.commons.rdf.experimental.RDFParser;
+import org.apache.commons.rdf.simple.experimental.AbstractRDFParser;
+import org.apache.commons.rdf.simple.experimental.RDFParseException;
/**
- * For test purposes - a {@link RDFParserBuilder} that inserts information
+ * For test purposes - a {@link RDFParser} that inserts information
* about what it has been asked to parse instead of actually parsing anything.
* <p>
* This always insert at least the triple equivalent to:
* <pre>
* <urn:uuid:b7ac3fcc-4d86-4d28-8358-a1cd094974a6> <http://example.com/greeting> "Hello world" .
* </pre>
- * Additional triples match the corresponding getter in AbstractRDFParserBuilder,
+ * Additional triples match the corresponding getter in AbstractRDFParser,
* e.g.:
* <pre>
* <urn:uuid:b7ac3fcc-4d86-4d28-8358-a1cd094974a6> <http://example.com/base> <http://www.example.org/> .
@@ -43,7 +45,7 @@ import org.apache.commons.rdf.api.RDFTermFactory;
*
*
*/
-public class DummyRDFParserBuilder extends AbstractRDFParserBuilder<DummyRDFParserBuilder> {
+public class DummyRDFParserBuilder extends AbstractRDFParser<DummyRDFParserBuilder> {
@Override
protected void parseSynchronusly() throws IOException, IllegalStateException, RDFParseException {
@@ -57,7 +59,7 @@ public class DummyRDFParserBuilder extends AbstractRDFParserBuilder<DummyRDFPars
t.accept(factory.createQuad(null, parsing, factory.createIRI("http://example.com/greeting"),
factory.createLiteral("Hello world")));
- // Now we'll expose the finalized AbstractRDFParserBuilder settings
+ // Now we'll expose the finalized AbstractRDFParser settings
// so they can be inspected by the junit test
if (getSourceIri().isPresent()) {
http://git-wip-us.apache.org/repos/asf/incubator-commonsrdf/blob/10d27cde/simple/src/test/java/org/apache/commons/rdf/simple/experimental/AbstractRDFParserTest.java
----------------------------------------------------------------------
diff --git a/simple/src/test/java/org/apache/commons/rdf/simple/experimental/AbstractRDFParserTest.java b/simple/src/test/java/org/apache/commons/rdf/simple/experimental/AbstractRDFParserTest.java
new file mode 100644
index 0000000..f263029
--- /dev/null
+++ b/simple/src/test/java/org/apache/commons/rdf/simple/experimental/AbstractRDFParserTest.java
@@ -0,0 +1,256 @@
+/**
+ * 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.experimental;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertTrue;
+
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.concurrent.TimeUnit;
+
+import org.apache.commons.rdf.api.Graph;
+import org.apache.commons.rdf.api.IRI;
+import org.apache.commons.rdf.api.Literal;
+import org.apache.commons.rdf.api.RDFSyntax;
+import org.apache.commons.rdf.api.RDFTerm;
+import org.apache.commons.rdf.api.RDFTermFactory;
+import org.apache.commons.rdf.api.Triple;
+import org.apache.commons.rdf.experimental.RDFParser;
+import org.apache.commons.rdf.simple.DummyRDFParserBuilder;
+import org.apache.commons.rdf.simple.SimpleRDFTermFactory;
+import org.apache.commons.rdf.simple.Types;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.ExpectedException;
+
+public class AbstractRDFParserTest {
+
+ private RDFTermFactory factory = new SimpleRDFTermFactory();
+
+ private DummyRDFParserBuilder dummyParser = new DummyRDFParserBuilder();
+ private Path testNt;
+ private Path testTtl;
+ private Path testXml;
+
+ @Before
+ public void createTempFile() throws IOException {
+ testNt = Files.createTempFile("test", ".nt");
+ testTtl = Files.createTempFile("test", ".ttl");
+ testXml = Files.createTempFile("test", ".xml");
+
+ // No need to populate the files as the dummy parser
+ // doesn't actually read anything
+ }
+
+ @After
+ public void deleteTempFiles() throws IOException {
+ Files.deleteIfExists(testNt);
+ Files.deleteIfExists(testTtl);
+ Files.deleteIfExists(testXml);
+ }
+
+ @Test
+ public void guessRDFSyntax() throws Exception {
+ assertEquals(RDFSyntax.NTRIPLES, AbstractRDFParser.guessRDFSyntax(testNt).get());
+ assertEquals(RDFSyntax.TURTLE, AbstractRDFParser.guessRDFSyntax(testTtl).get());
+ assertFalse(AbstractRDFParser.guessRDFSyntax(testXml).isPresent());
+ }
+
+ private void checkGraph(Graph g) throws Exception {
+ assertTrue(g.size() > 0);
+ IRI greeting = factory.createIRI("http://example.com/greeting");
+ // Should only have parsed once!
+ assertEquals(1, g.getTriples(null, greeting, null).count());
+ Triple triple = g.getTriples(null, greeting, null).findAny().get();
+ assertTrue(triple.getSubject() instanceof IRI);
+ IRI parsing = (IRI) triple.getSubject();
+ assertTrue(parsing.getIRIString().startsWith("urn:uuid:"));
+
+ assertEquals("http://example.com/greeting", triple.getPredicate().getIRIString());
+
+ assertTrue(triple.getObject() instanceof Literal);
+ Literal literal = (Literal) triple.getObject();
+ assertEquals("Hello world", literal.getLexicalForm());
+ assertFalse(literal.getLanguageTag().isPresent());
+ assertEquals(Types.XSD_STRING, literal.getDatatype());
+
+ // Check uniqueness of properties that are always present
+ assertEquals(1,
+ g.getTriples(null, factory.createIRI("http://example.com/source"), null).count());
+
+ // Check optional properties that are unique
+ assertTrue(2 > g.getTriples(null, factory.createIRI("http://example.com/base"), null).count());
+ assertTrue(2 > g.getTriples(null, factory.createIRI("http://example.com/contentType"), null).count());
+ assertTrue(2 > g.getTriples(null, factory.createIRI("http://example.com/contentTypeSyntax"), null).count());
+ }
+
+ @Test
+ public void parseFile() throws Exception {
+ Graph g = factory.createGraph();
+ RDFParser parser = dummyParser.source(testNt).target(g);
+ parser.parse().get(5, TimeUnit.SECONDS);
+ checkGraph(g);
+ // FIXME: this could potentially break if the equivalent of /tmp includes
+ // international characters
+ assertEquals("<" + testNt.toUri().toString() + ">", firstPredicate(g, "source"));
+ // Should be set to the file path
+ assertEquals("<" + testNt.toUri().toString() + ">", firstPredicate(g, "base"));
+
+ // Should NOT have guessed the content type
+ assertNull(firstPredicate(g, "contentType"));
+ assertNull(firstPredicate(g, "contentTypeSyntax"));
+ }
+
+
+ @Test
+ public void parseNoSource() throws Exception {
+ thrown.expect(IllegalStateException.class);
+ dummyParser.parse();
+ }
+
+ @Test
+ public void parseBaseAndContentTypeNoSource() throws Exception {
+ // Can set the other options, even without source()
+ IRI base = dummyParser.createRDFTermFactory().createIRI("http://www.example.org/test.rdf");
+ RDFParser parser = dummyParser.base(base).contentType(RDFSyntax.RDFXML);
+ thrown.expect(IllegalStateException.class);
+ thrown.expectMessage("No source has been set");
+ // but .parse() should fail
+ parser.parse();
+ }
+
+ @Test
+ public void parseFileMissing() throws Exception {
+ Files.delete(testNt);
+ // This should not fail yet
+ RDFParser parser = dummyParser.source(testNt);
+ // but here:
+ thrown.expect(IOException.class);
+ parser.parse();
+ }
+
+
+ @Test
+ public void parseFileContentType() throws Exception {
+ Graph g = factory.createGraph();
+ RDFParser parser = dummyParser
+ .source(testNt)
+ .contentType(RDFSyntax.NTRIPLES)
+ .target(g);
+ parser.parse().get(5, TimeUnit.SECONDS);
+ checkGraph(g);
+ // FIXME: this could potentially break if the equivalent of /tmp includes
+ // international characters
+ assertEquals("<" + testNt.toUri().toString() + ">", firstPredicate(g, "source"));
+ assertEquals("<" + testNt.toUri().toString() + ">", firstPredicate(g, "base"));
+ assertEquals("\"NTRIPLES\"", firstPredicate(g, "contentTypeSyntax"));
+ assertEquals("\"application/n-triples\"", firstPredicate(g, "contentType"));
+ }
+
+ private String firstPredicate(Graph g, String pred) {
+ return g.getTriples(null, factory.createIRI("http://example.com/" + pred), null)
+ .map(Triple::getObject).map(RDFTerm::ntriplesString).findAny().orElse(null);
+ }
+
+
+ @Rule
+ public ExpectedException thrown = ExpectedException.none();
+
+ @Test
+ public void parseInputStreamFailsIfBaseMissing() throws Exception {
+ InputStream inputStream = new ByteArrayInputStream(new byte[0]);
+ // Should not fail at this point
+ RDFParser parser = dummyParser.source(inputStream);
+ // but here:
+ thrown.expect(IllegalStateException.class);
+ thrown.expectMessage("base iri required for inputstream source");
+ parser.parse();
+ }
+
+ @Test
+ public void parseInputStreamWithBase() throws Exception {
+ InputStream inputStream = new ByteArrayInputStream(new byte[0]);
+ IRI base = dummyParser.createRDFTermFactory().createIRI("http://www.example.org/test.rdf");
+ Graph g = factory.createGraph();
+ RDFParser parser = dummyParser.source(inputStream).base(base).target(g);
+ parser.parse().get(5, TimeUnit.SECONDS);
+ checkGraph(g);
+ assertEquals("<http://www.example.org/test.rdf>", firstPredicate(g, "base"));
+ // in our particular debug output,
+ // bnode source indicates InputStream
+ assertTrue(firstPredicate(g, "source").startsWith("_:"));
+ assertNull(firstPredicate(g, "contentType"));
+ assertNull(firstPredicate(g, "contentTypeSyntax"));
+ }
+
+ @Test
+ public void parseInputStreamWithNQuads() throws Exception {
+ InputStream inputStream = new ByteArrayInputStream(new byte[0]);
+ Graph g = factory.createGraph();
+ RDFParser parser = dummyParser.source(inputStream).contentType(RDFSyntax.NQUADS).target(g);
+ parser.parse().get(5, TimeUnit.SECONDS);
+ checkGraph(g);
+ assertNull(firstPredicate(g, "base"));
+ // in our particular debug output,
+ // bnode source indicates InputStream
+ assertTrue(firstPredicate(g, "source").startsWith("_:"));
+ assertEquals("\"application/n-quads\"", firstPredicate(g, "contentType"));
+ assertEquals("\"NQUADS\"", firstPredicate(g, "contentTypeSyntax"));
+ }
+
+ @Test
+ public void parseIRI() throws Exception {
+ IRI iri = dummyParser.createRDFTermFactory().createIRI("http://www.example.net/test.ttl");
+ Graph g = factory.createGraph();
+ RDFParser parser = dummyParser.source(iri).target(g);
+ parser.parse().get(5, TimeUnit.SECONDS);
+ checkGraph(g);
+ assertEquals("<http://www.example.net/test.ttl>", firstPredicate(g, "source"));
+ // No base - assuming the above IRI is always
+ // the base would break server-supplied base from
+ // any HTTP Location redirects and Content-Location header
+ assertNull(firstPredicate(g, "base"));
+ // ".ttl" in IRI string does not imply any content type
+ assertNull(firstPredicate(g, "contentType"));
+ assertNull(firstPredicate(g, "contentTypeSyntax"));
+
+ }
+
+ @Test
+ public void parseIRIBaseContentType() throws Exception {
+ IRI iri = dummyParser.createRDFTermFactory().createIRI("http://www.example.net/test.ttl");
+ Graph g = factory.createGraph();
+ RDFParser parser = dummyParser.source(iri).base(iri).contentType(RDFSyntax.TURTLE).target(g);
+ parser.parse().get(5, TimeUnit.SECONDS);
+ checkGraph(g);
+ assertEquals("<http://www.example.net/test.ttl>", firstPredicate(g, "source"));
+ assertEquals("<http://www.example.net/test.ttl>", firstPredicate(g, "base"));
+ assertEquals("\"TURTLE\"", firstPredicate(g, "contentTypeSyntax"));
+ assertEquals("\"text/turtle\"", firstPredicate(g, "contentType"));
+ }
+
+
+}