@Test
public void directDataLinkToQuads() throws IOException {
// first make a file of quads to load later
final Model model = createDefaultModel();
final Path quads = createTempFile("quadExample", ".nq");
final Resource quadsURI = model.createResource(quads.toFile().toURI().toString());
final Resource simpleExample = model.createResource("test:simpleExample");
simpleExample.addProperty(type, DatasetAssemblerVocab.tDatasetTxnMem);
simpleExample.addProperty(data, quadsURI);
final DatasetGraph dsg = createTxnMem().asDatasetGraph();
model
.listStatements()
.mapWith(Statement::asTriple)
.mapWith(t -> new Quad(quadsURI.asNode(), t))
.forEachRemaining(dsg::add);
try (OutputStream out = new FileOutputStream(quads.toFile())) {
write(out, dsg, NQUADS);
}
final Dataset dataset = assemble(simpleExample);
final Model assembledDefaultModel = dataset.getDefaultModel();
final Model assembledNamedModel = dataset.getNamedModel(quadsURI.getURI());
assertTrue(assembledDefaultModel.isEmpty());
assertTrue(
assembledNamedModel.contains(
assembledNamedModel.createStatement(simpleExample, data, quadsURI)));
}
@Test
/**
* Reads from TRIG with Jena API into Dataset 1, transforms one named Model from that Dataset into
* Signingframework's API GraphCollection with one NamedGraph, transforms (converts) that
* NamedGraph into Jena's Model, and checks if the resulting Model is the same as original Model.
*/
public void namedGraphToModelTest() throws Exception {
for (String resourceFile : RESOURCE_FILES) {
// prepare GraphCollection with NamedGraph to be converted:
InputStream is = this.getClass().getResourceAsStream(resourceFile);
Dataset dataset = DatasetFactory.createMem();
RDFDataMgr.read(dataset, is, RDFFormat.TRIG.getLang());
is.close();
String modelName = dataset.listNames().next();
Model model1 = dataset.getNamedModel(modelName);
// this method is not tested here and used just for input
// generation and to make it easier Namedgraph<->Model comparison
// (but it's tested in other method, see modelToGraphCollectionTest())
GraphCollection gc = ModelConverter.modelToGraphCollection(modelName, dataset);
LinkedList<NamedGraph> graphs = gc.getGraphs();
String graphName = null;
for (NamedGraph g : graphs) {
if (!g.getName().isEmpty() && g.getName().contains(modelName)) {
graphName = g.getName();
break;
}
}
// use this when debugging:
// File outFile0 = File.createTempFile("won", ".trig");
// System.out.println(outFile0);
// OutputStream os0 = new FileOutputStream(outFile0);
// TriGPlusWriter.writeFile(gc, outFile0.getAbsolutePath(), false);
// os0.close();
// test convert from NamedGraph of GraphCollection into Model
Model model2 = ModelConverter.namedGraphToModel(graphName, gc);
Dataset dataset2 = DatasetFactory.createMem();
dataset2.addNamedModel(modelName, model2);
// TODO maybe chng the API so that the prefix map is taken care of in the converter:
// if it makes sense from the the usage of this in Assembler point of view
dataset2.getDefaultModel().setNsPrefixes(dataset2.getNamedModel(modelName).getNsPrefixMap());
File outFile = testFolder.newFile();
// use this when debugging:
// File outFile = File.createTempFile("won", ".trig");
// System.out.println(outFile);
OutputStream os = new FileOutputStream(outFile);
RDFDataMgr.write(os, dataset2, RDFFormat.TRIG.getLang());
os.close();
// make sure that the original Model that was used to generate test input
// GraphCollection with NamedGraph is isomorphic with the Model after
// conversion is applied:
Assert.assertTrue(model1.listStatements().hasNext() && model2.listStatements().hasNext());
Assert.assertTrue(model1.isIsomorphicWith(model2));
}
}
@Override
protected void writeTuples(File f, List<Triple> tuples) throws FileNotFoundException {
Graph g = GraphFactory.createGraphMem();
for (Triple t : tuples) {
g.add(t);
}
RDFDataMgr.write(new FileOutputStream(f), g, getLanguage());
}
@Override
protected void doGet(HttpAction action) {
// Assume success - do the set up before grabbing the lock.
// Sets content type.
MediaType mediaType = ActionLib.contentNegotationRDF(action);
ServletOutputStream output;
try {
output = action.response.getOutputStream();
} catch (IOException ex) {
ServletOps.errorOccurred(ex);
output = null;
}
TypedOutputStream out = new TypedOutputStream(output, mediaType);
Lang lang = RDFLanguages.contentTypeToLang(mediaType.getContentType());
if (action.verbose)
action.log.info(
format(
"[%d] Get: Content-Type=%s, Charset=%s => %s",
action.id, mediaType.getContentType(), mediaType.getCharset(), lang.getName()));
action.beginRead();
setCommonHeaders(action.response);
try {
Target target = determineTarget(action);
if (action.log.isDebugEnabled()) action.log.debug("GET->" + target);
boolean exists = target.exists();
if (!exists) ServletOps.errorNotFound("No such graph: <" + target.name + ">");
// If we want to set the Content-Length, we need to buffer.
// response.setContentLength(??) ;
String ct = lang.getContentType().toHeaderString();
action.response.setContentType(ct);
Graph g = target.graph();
// Special case RDF/XML to be the plain (faster, less readable) form
RDFFormat fmt =
(lang == Lang.RDFXML)
? RDFFormat.RDFXML_PLAIN
: RDFWriterRegistry.defaultSerialization(lang);
try {
RDFDataMgr.write(out, g, fmt);
} catch (JenaException ex) {
// Some RDF/XML data is unwritable. All we can do is pretend it's a bad
// request (inappropriate content type).
// Good news - this happens before any output for RDF/XML-ABBREV.
if (fmt.getLang().equals(Lang.RDFXML))
ServletOps.errorBadRequest("Failed to write output in RDF/XML: " + ex.getMessage());
else ServletOps.errorOccurred("Failed to write output: " + ex.getMessage(), ex);
}
ServletOps.success(action);
} finally {
action.endRead();
}
}
@Test
/**
* Reads from TRIG with Jena API into Dataset 1, transforms one named graph from that Dataset into
* Signingframework's API GraphCollection and writes it with Signingframework's API, reads the
* result with Jena API into Dataset 2, and checks if the specified named graph model from Dataset
* 1 is isomorphic with the same named graph model from Dataset 2.
*/
public void modelToGraphCollectionTest() throws Exception {
for (String resourceFile : RESOURCE_FILES) {
// prepare the input Dataset containg the Model to be converted
InputStream is = this.getClass().getResourceAsStream(resourceFile);
File outFile = testFolder.newFile();
// use this when debugging:
// File outFile = File.createTempFile("won", ".trig");
// System.out.println(outFile);
Dataset dataset = DatasetFactory.createMem();
RDFDataMgr.read(dataset, is, RDFFormat.TRIG.getLang());
is.close();
// test the convertion from the Model to the NamedGraph
String modelName = dataset.listNames().next();
Model model = dataset.getNamedModel(modelName);
// the method to be tested
GraphCollection gc = ModelConverter.modelToGraphCollection(modelName, dataset);
TriGPlusWriter.writeFile(gc, outFile.getAbsolutePath(), false);
// check that the resulting graph collection is a representation
// of the converted model. For this, read the resulting graph collection
// as a Model with Jena API
InputStream is2 = new FileInputStream(outFile);
Dataset dataset2 = DatasetFactory.createMem();
RDFDataMgr.read(dataset2, is2, RDFFormat.TRIG.getLang());
is2.close();
Model model2 = dataset2.getNamedModel(modelName);
File outFile2 = testFolder.newFile();
// use this when debugging:
// File outFile2 = File.createTempFile("won", ".trig");
// System.out.println(outFile2);
OutputStream os = new FileOutputStream(outFile2);
RDFDataMgr.write(os, dataset2, RDFFormat.TRIG.getLang());
os.close();
// check that the model obtained from resulting graph collection is
// a representation of the original converted model.
Assert.assertTrue(model.listStatements().hasNext() && model2.listStatements().hasNext());
Assert.assertTrue(model.isIsomorphicWith(model2));
}
}
public static void outputInfo(Model model, String var) {
// compose the query
String sparql =
"BASE <http://example.org/inst/>"
+ "CONSTRUCT { <"
+ var
+ "> ?P ?O } "
+ "WHERE { <"
+ var
+ "> ?P ?O }";
// carry out the query
Query query = QueryFactory.create(sparql);
QueryExecution qe = QueryExecutionFactory.create(query, model);
Model results = qe.execConstruct();
// print inferred triples
System.out.println();
System.out.println(var + ":");
RDFDataMgr.write(System.out, results, RDFLanguages.NT);
}
public static void main(String[] args) throws IOException {
if (args.length != 2) {
err.println("usage: difference <db1> <db2>");
}
Dataset ds1 = dataset_(args[0]);
Dataset ds2 = dataset_(args[1]);
Model m1 = ds1.getDefaultModel();
Model m2 = ds2.getDefaultModel();
System.out.println(m1.size());
System.out.println(m2.size());
Model m1_minus_m2 = m1.difference(m2);
RDFDataMgr.write(
new FileOutputStream("missing-orthologousMatch-in-biological-concepts-db.ttl"),
m1_minus_m2,
Lang.TURTLE);
ds1.close();
ds2.close();
}
@Override
public void process(final Model model) {
String identifier = null;
try {
identifier =
model
.listObjectsOfProperty(model.createProperty(filenameUtil.property))
.next()
.toString();
LOG.debug("Going to store identifier=" + identifier);
} catch (NoSuchElementException e) {
LOG.warn("No identifier => cannot derive a filename for " + model.toString());
return;
}
String directory = identifier;
if (directory.length() >= filenameUtil.endIndex) {
directory = directory.substring(filenameUtil.startIndex, filenameUtil.endIndex);
}
final String file =
FilenameUtils.concat(
filenameUtil.target,
FilenameUtils.concat(
directory + File.separator, identifier + "." + filenameUtil.fileSuffix));
LOG.debug("Write to " + file);
filenameUtil.ensurePathExists(file);
try (final Writer writer =
new OutputStreamWriter(new FileOutputStream(file), filenameUtil.encoding)) {
final StringWriter tripleWriter = new StringWriter();
RDFDataMgr.write(tripleWriter, model, this.serialization);
IOUtils.write(tripleWriter.toString(), writer);
writer.close();
} catch (IOException e) {
e.printStackTrace();
throw new MetafactureException(e);
}
}
@Test
public void directDataLinkForDefaultAndNamedGraphs() throws IOException {
// first make a file of triples to load later
final Model model = createDefaultModel();
final Path triples = createTempFile("simpleExample", ".nt");
final Resource triplesURI = model.createResource(triples.toFile().toURI().toString());
final Resource simpleExample = model.createResource("test:simpleExample");
simpleExample.addProperty(type, DatasetAssemblerVocab.tDatasetTxnMem);
// add a default graph
simpleExample.addProperty(data, triplesURI);
// add a named graph
final Resource namedGraphDef = model.createResource("test:namedGraphDef");
simpleExample.addProperty(pNamedGraph, namedGraphDef);
final Resource namedGraphName = model.createResource("test:namedGraphExample");
namedGraphDef.addProperty(type, MemoryModel);
namedGraphDef.addProperty(pGraphName, namedGraphName);
namedGraphDef.addProperty(data, triplesURI);
try (OutputStream out = new FileOutputStream(triples.toFile())) {
write(out, model, NTRIPLES);
}
final Dataset dataset = assemble(simpleExample);
final Model assembledDefaultModel = dataset.getDefaultModel();
final Model assembledNamedModel = dataset.getNamedModel(namedGraphName.getURI());
// we put the same triples in each model, so we check for the same triples in each model
for (final Model m : new Model[] {assembledDefaultModel, assembledNamedModel}) {
assertTrue(m.contains(simpleExample, pNamedGraph, namedGraphDef));
assertTrue(m.contains(namedGraphDef, pGraphName, namedGraphName));
assertTrue(m.contains(simpleExample, data, triplesURI));
}
final Iterator<Node> graphNodes = dataset.asDatasetGraph().listGraphNodes();
assertTrue(graphNodes.hasNext());
assertEquals(namedGraphName.asNode(), graphNodes.next());
assertFalse(graphNodes.hasNext());
}
public void readVideosFromRDF(String keyword) {
Model model = ModelFactory.createDefaultModel();
model.read(keyword + ".nt", "NTRIPLES");
RDFDataMgr.write(System.out, model, Lang.NTRIPLES);
}
public void writeVideosToRDF(String keyword) {
String api_key = "AIzaSyCZO2nHBNMSGgRg4VHMZ9P8dWT0H23J-Fc";
String yt_url =
"https://www.googleapis.com/youtube/v3/search?part=snippet&q="
+ keyword
+ "&type=video&videoCaption=closedCaption&key="
+ api_key
+ "&format=5&maxResults=10&v=2";
String line = "", stringArray;
StringBuilder stringArrayBuilder = new StringBuilder();
String titleOfVideo;
String description;
String thumbnailURL;
String videoId;
Model model = ModelFactory.createDefaultModel();
try {
URL url = new URL(yt_url);
BufferedReader br = new BufferedReader(new InputStreamReader(url.openStream()));
while ((line = br.readLine()) != null) {
stringArrayBuilder = stringArrayBuilder.append(line);
}
stringArray = stringArrayBuilder.toString();
JSONObject nodeRoot = new JSONObject(stringArray);
JSONArray jsonArray = (JSONArray) nodeRoot.get("items");
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject obj = jsonArray.getJSONObject(i);
JSONObject snippet = (JSONObject) obj.get("snippet");
description = (String) snippet.get("description");
titleOfVideo = (String) snippet.get("title");
JSONObject thumbnails = (JSONObject) snippet.get("thumbnails");
JSONObject thumbnail = (JSONObject) thumbnails.get("high");
thumbnailURL = (String) thumbnail.get("url");
JSONObject id = (JSONObject) obj.get("id");
videoId = (String) id.get("videoId");
Resource video = model.createResource("video" + i);
Property p1 = model.createProperty("title");
video.addProperty(p1, titleOfVideo);
Property p2 = model.createProperty("description");
video.addProperty(p2, description);
Property p3 = model.createProperty("thumbnail");
video.addProperty(p3, thumbnailURL);
Property p4 = model.createProperty("id");
video.addProperty(p4, videoId);
}
FileOutputStream fos = new FileOutputStream(keyword + ".nt");
RDFDataMgr.write(fos, model, Lang.NTRIPLES);
} catch (Exception ex) {
ex.printStackTrace();
}
}
