Examples with RDFWriter org.openrdf.rio.RDFWriter used on opensource projects

Example 1 with RDFWriter

use of org.openrdf.rio.RDFWriter in project qi4j-sdk by Qi4j.

the class ApplicationXmlTest method writeN3.

private void writeN3(Iterable<Statement> graph) throws RDFHandlerException, IOException {
    RDFWriterFactory writerFactory = new N3WriterFactory();
    RDFWriter writer = writerFactory.getWriter(System.out);
    writeOutput(writer, graph);
}

Example 2 with RDFWriter

use of org.openrdf.rio.RDFWriter in project qi4j-sdk by Qi4j.

the class ApplicationXmlTest method writeXml.

private void writeXml(Iterable<Statement> graph) throws RDFHandlerException, IOException {
    RDFWriterFactory writerFactory = new RDFXMLWriterFactory();
    RDFWriter writer = writerFactory.getWriter(System.out);
    writeOutput(writer, graph);
}

Example 3 with RDFWriter

use of org.openrdf.rio.RDFWriter in project blueprints by tinkerpop.

the class PropertyGraphSailTest method testRDFDump.

@Test
public void testRDFDump() throws Exception {
    Repository repo = new SailRepository(sail);
    RepositoryConnection rc = repo.getConnection();
    try {
        RDFWriter w = Rio.createWriter(RDFFormat.TURTLE, System.out);
        rc.export(w);
    } finally {
        rc.close();
    }
}

Example 4 with RDFWriter

use of org.openrdf.rio.RDFWriter in project qi4j-sdk by Qi4j.

the class AbstractSerializer method serialize.

@Override
public void serialize(Iterable<Statement> graph, Writer out, String[] namespacePrefixes, String[] namespaces) throws RDFHandlerException {
    RDFWriterFactory writerFactory;
    try {
        writerFactory = writerFactoryClass.newInstance();
    } catch (InstantiationException e) {
        throw new InternalError();
    } catch (IllegalAccessException e) {
        throw new InternalError();
    }
    RDFWriter writer = writerFactory.getWriter(out);
    writer.startRDF();
    for (int i = 0; i < namespacePrefixes.length; i++) {
        String namespacePrefix = namespacePrefixes[i];
        String namespace = namespaces[i];
        writer.handleNamespace(namespacePrefix, namespace);
    }
    for (Statement st : graph) {
        writer.handleStatement(st);
    }
    writer.endRDF();
}

Example 5 with RDFWriter

use of org.openrdf.rio.RDFWriter in project blueprints by tinkerpop.

the class SailGraph method saveRDF.

/**
     * Save RDF data from the SailGraph.
     * Supported formats include rdf-xml, n-triples, turtle, n3, trix, or trig.
     *
     * @param output the OutputStream to which to write RDF data
     * @param format supported formats include rdf-xml, n-triples, turtle, n3, trix, or trig
     */
public void saveRDF(final OutputStream output, final String format) {
    try {
        this.commit();
        final SailConnection c = this.rawGraph.getConnection();
        try {
            c.begin();
            RDFWriter w = Rio.createWriter(getFormat(format), output);
            w.startRDF();
            CloseableIteration<? extends Statement, SailException> iter = c.getStatements(null, null, null, false);
            try {
                while (iter.hasNext()) {
                    w.handleStatement(iter.next());
                }
            } finally {
                iter.close();
            }
            w.endRDF();
        } finally {
            c.rollback();
            c.close();
        }
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
}