Examples with ExhibitJsonReader edu.mit.simile.babel.exhibit.ExhibitJsonReader used on opensource projects

Example 1 with ExhibitJsonReader

use of edu.mit.simile.babel.exhibit.ExhibitJsonReader in project backstage by zepheira.

the class DataLoadingUtilities method loadDataFromStream.

public static void loadDataFromStream(InputStream stream, String sourceURL, String lang, Sail sail) throws Exception {
    RepoSailTuple rs = createMemoryRepository(null);
    Repository r = rs.repository;
    lang = lang.toLowerCase();
    if ("exhibit/json".equals(lang)) {
        Properties properties = new Properties();
        BabelReader reader = new ExhibitJsonReader();
        try {
            if (reader.takesReader()) {
                InputStreamReader isr = new InputStreamReader(stream);
                reader.read(isr, sail, properties, Locale.getDefault());
            } else {
                reader.read(stream, sail, properties, Locale.getDefault());
            }
        } finally {
            stream.close();
        }
    } else {
        RDFParser parser = null;
        if ("rdfxml".equals(lang)) {
            parser = new RDFXMLParser(r.getValueFactory());
        } else if ("n3".equals(lang) || "turtle".equals(lang)) {
            parser = new TurtleParser(r.getValueFactory());
        } else if ("ntriples".equals(lang)) {
            parser = new NTriplesParser(r.getValueFactory());
        }
        try {
            SailConnection c = null;
            try {
                c = sail.getConnection();
                BNodeConverterStatementHandler handler = new BNodeConverterStatementHandler(c);
                parser.setRDFHandler(handler);
                parser.setParseErrorListener(new LoggingParseErrorListener(sourceURL));
                parser.setVerifyData(false);
                parser.setStopAtFirstError(false);
                parser.parse(stream, sourceURL);
                c.commit();
                _logger.info("Read " + handler.m_count + " statements from '" + sourceURL + "'");
            } catch (RepositoryException e) {
                if (c != null)
                    c.rollback();
            } finally {
                if (c != null)
                    c.close();
            }
        } catch (Exception e) {
            throw new ModelReadFromFileException("Failed to read data from '" + sourceURL + "'", e);
        } finally {
            stream.close();
        }
    }
}