Examples of org.openrdf.rio.RDFParser

org.openrdf.rio.RDFParser
An interface for RDF parsers. All implementing classes should define a public zero-argument constructor to allow them to be created through reflection.

  {
    String mimeType = entity.getMediaType().getName();
    RDFFormat rdfFormat = Rio.getParserFormatForMIMEType(mimeType);


    try {
      RDFParser parser = Rio.createParser(rdfFormat);


      Model model = new LinkedHashModel();
      parser.setRDFHandler(new StatementCollector(model));


      parser.parse(entity.getStream(), "");


      return model;
    }
    catch (UnsupportedRDFormatException e) {
      throw new ResourceException(CLIENT_ERROR_UNSUPPORTED_MEDIA_TYPE,

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     */
    protected void parseDocumentSource(
            final OWLOntologyDocumentSource documentSource,
            final String baseUri, final RDFHandler handler) throws IOException,
            RDFParseException, RDFHandlerException {
        final RDFParser createParser = Rio.createParser(owlFormatFactory
                .getRioFormat());
        createParser.getParserConfig().addNonFatalError(
                BasicParserSettings.VERIFY_DATATYPE_VALUES);
        createParser.getParserConfig().addNonFatalError(
                BasicParserSettings.VERIFY_LANGUAGE_TAGS);
        createParser.setRDFHandler(handler);
        long rioParseStart = System.currentTimeMillis();
        if (owlFormatFactory.isTextual() && documentSource.isReaderAvailable()) {
            createParser.parse(documentSource.getReader(), baseUri);
        } else if (documentSource.isInputStreamAvailable()) {
            createParser.parse(documentSource.getInputStream(), baseUri);
        } else {
            URL url = URI.create(documentSource.getDocumentIRI().toString())
                    .toURL();
            URLConnection conn = url.openConnection();
            createParser.parse(conn.getInputStream(), baseUri);
        }
        if (LOGGER.isDebugEnabled()) {
            LOGGER.debug("rioParse: timing={}", System.currentTimeMillis()
                    - rioParseStart);
        }

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                + " was not inside the expected bounds",
                result.length() > 24000);
        assertTrue("result.length()=" + result.length()
                + " was not inside the expected bounds",
                result.length() < 26000);
        RDFParser parser = Rio.createParser(RDFFormat.RDFXML, vf);
        parser.setRDFHandler(testHandlerStatementCollector);
        parser.parse(new StringReader(result), "");
        // NOTE: The base xmlns: does not get counted as a namespace by the Rio
        // RDFXML parser, which
        // is why it counts to 5, compared to direct StatementCollector result
        // and the turtle result
        assertEquals(5, testHandlerStatementCollector.getNamespaces().size());

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        // only test a minimum length and a maximum length
        assertTrue("result.length()=" + result.length()
                + " was not inside the expected bounds", result.length() > 8500);
        assertTrue("result.length()=" + result.length()
                + " was not inside the expected bounds", result.length() < 9500);
        RDFParser parser = Rio.createParser(RDFFormat.TURTLE, vf);
        parser.setRDFHandler(testHandlerStatementCollector);
        parser.parse(new StringReader(result), "");
        assertEquals(6, testHandlerStatementCollector.getNamespaces().size());
        assertEquals(171, testHandlerStatementCollector.getStatements().size());
        // check for duplicate statements
        HashSet<Statement> resultStatements = new HashSet<>(
                testHandlerStatementCollector.getStatements());

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                + " was not inside the expected bounds",
                result.length() > 26500);
        assertTrue("result.length()=" + result.length()
                + " was not inside the expected bounds",
                result.length() < 27500);
        RDFParser parser = Rio.createParser(RDFFormat.NTRIPLES, vf);
        parser.setRDFHandler(testHandlerStatementCollector);
        parser.parse(new StringReader(result), "");
        // NTriples does not contain namespaces, so we will not find any when
        // parsing the document
        assertEquals(0, testHandlerStatementCollector.getNamespaces().size());
        assertEquals(171, testHandlerStatementCollector.getStatements().size());
        // check for duplicate statements

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                resultStatements.size());
    }


    @Test
    public void testRioOWLRDFParser() throws Exception {
        RDFParser parser = new RioManchesterSyntaxParserFactory().getParser();
        String inputManSyntax = "Prefix: owl: <http://www.w3.org/2002/07/owl#>\n"
                + "Prefix: rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>\n"
                + "Prefix: xml: <http://www.w3.org/XML/1998/namespace>\n"
                + "Prefix: xsd: <http://www.w3.org/2001/XMLSchema#>\n"
                + "Prefix: rdfs: <http://www.w3.org/2000/01/rdf-schema#>\n"
                + "Ontology: <http://www.owl-ontologies.com/Ontology1307394066.owl>\n"
                + "Datatype: xsd:decimal\n"
                + "Datatype: xsd:int\n"
                + "Datatype: xsd:dateTime\n"
                + "DataProperty: <http://www.owl-ontologies.com/Ontology1307394066.owl#hasAge>\n"
                + "    Characteristics: \n"
                + "        Functional\n"
                + "    Range: \n"
                + "        xsd:int\n"
                + "DataProperty: <http://www.owl-ontologies.com/Ontology1307394066.owl#hasDate>\n"
                + "    Range: \n"
                + "        xsd:dateTime\n"
                + "Class: <http://www.owl-ontologies.com/Ontology1307394066.owl#Person>\n"
                + "Individual: <http://www.owl-ontologies.com/Ontology1307394066.owl#p1>\n"
                + "    Types: \n"
                + "        <http://www.owl-ontologies.com/Ontology1307394066.owl#Person>\n"
                + "Rule: \n"
                + "    xsd:decimal(?x), <http://www.owl-ontologies.com/Ontology1307394066.owl#hasAge>(?p, ?x) -> <http://www.owl-ontologies.com/Ontology1307394066.owl#Person>(?p)";
        parser.setRDFHandler(testHandlerStatementCollector);
        parser.parse(new StringReader(inputManSyntax),
                "http://www.owl-ontologies.com/Ontology1307394066.owl");
        assertEquals(36, testHandlerStatementCollector.getStatements().size());
    }

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        }
    }


    private List<Statement> loadResultStatement(String resultFilePath)
            throws RDFHandlerException, IOException, RDFParseException {
        RDFParser nQuadsParser = Rio.createParser(RDFFormat.NQUADS);
        TestRDFHandler rdfHandler = new TestRDFHandler();
        nQuadsParser.setRDFHandler(rdfHandler);
        File file = copyResourceToTempFile(resultFilePath);
        nQuadsParser.parse(
                new FileReader(file),
                baseURI.toString()
        );
        return rdfHandler.getStatements();
    }

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        } catch (XSLTStylesheetException xslte) {
            throw new ExtractionException("An error occurred during the XSLT application.", xslte);
        }


        try {
            RDFParser parser
                    = RDFParserFactory.getInstance().getRDFXMLParser(
                        verifyDataType, stopAtFirstError, extractionContext, out
                    );
            parser.parse(
                    new StringReader(buffer.getBuffer().toString()),
                    extractionContext.getDocumentURI().stringValue()
            );
        } catch (RDFHandlerException ex) {
            throw new IllegalStateException(

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            ExtractionContext extractionContext,
            InputStream in,
            ExtractionResult extractionResult
    ) throws IOException, ExtractionException {
        try {
            final RDFParser parser = getParser(extractionContext, extractionResult);
            parser.parse(in, extractionContext.getDocumentURI().stringValue());
        } catch (RDFHandlerException ex) {
            throw new IllegalStateException("Unexpected exception.", ex);
        } catch (RDFParseException ex) {
            throw new ExtractionException("Error while parsing RDF document.", ex, extractionResult);
        }

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     * @return <code>true</code> if <i>Turtle</i> patterns are detected, <code>false</code> otherwise.
     * @throws IOException
     */
    public static boolean checkTurtleFormat(InputStream is) throws IOException {
        String sample = extractDataSample(is, '.');
        RDFParser turtleParser = Rio.createParser(RDFFormat.TURTLE);
        turtleParser.setDatatypeHandling(RDFParser.DatatypeHandling.VERIFY);
        turtleParser.setStopAtFirstError(true);
        turtleParser.setVerifyData(true);
        ByteArrayInputStream bais = new ByteArrayInputStream( sample.getBytes() );
        try {
            turtleParser.parse(bais, "");
            return true;
        } catch (Exception e) {
            return false;
        }
    }

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