Java Code Examples for org.eclipse.rdf4j.rio.RDFFormat#NTRIPLES

The following examples show how to use org.eclipse.rdf4j.rio.RDFFormat#NTRIPLES . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source File: RdfSerializationExample.java    From Wikidata-Toolkit-Examples with Apache License 2.0 5 votes vote down vote up 
public static void main(String[] args) throws IOException {

		// Define where log messages go
		ExampleHelpers.configureLogging();

		// Print information about this program
		printDocumentation();

		// Initialize sites; only needed to link to Wikipedia pages in RDF
		DumpProcessingController dumpProcessingController = new DumpProcessingController(
				"wikidatawiki");
		dumpProcessingController.setOfflineMode(ExampleHelpers.OFFLINE_MODE);
		Sites sites = dumpProcessingController.getSitesInformation();

		// Prepare a compressed output stream to write the data to
		// (admittedly, this is slightly over-optimized for an example)
		OutputStream bufferedFileOutputStream = new BufferedOutputStream(
				ExampleHelpers
						.openExampleFileOuputStream("wikidata-simple-statements.nt.gz"),
				1024 * 1024 * 5);
		GzipParameters gzipParameters = new GzipParameters();
		gzipParameters.setCompressionLevel(7);
		OutputStream compressorOutputStream = new GzipCompressorOutputStream(
				bufferedFileOutputStream, gzipParameters);
		OutputStream exportOutputStream = asynchronousOutputStream(compressorOutputStream);

		// Create a serializer processor
		RdfSerializer serializer = new RdfSerializer(RDFFormat.NTRIPLES,
				exportOutputStream, sites,
				PropertyRegister.getWikidataPropertyRegister());
		// Serialize simple statements (and nothing else) for all items
		serializer.setTasks(RdfSerializer.TASK_ITEMS
				| RdfSerializer.TASK_SIMPLE_STATEMENTS);

		// Run serialization
		serializer.open();
		ExampleHelpers.processEntitiesFromWikidataDump(serializer);
		serializer.close();
	}
Example 2
Source File: NTriplesParserFactory.java    From rdf4j with BSD 3-Clause "New" or "Revised" License 4 votes vote down vote up 
/**
 * Returns {@link RDFFormat#NTRIPLES}.
 */
@Override
public RDFFormat getRDFFormat() {
	return RDFFormat.NTRIPLES;
}
Example 3
Source File: NTriplesWriterFactory.java    From rdf4j with BSD 3-Clause "New" or "Revised" License 4 votes vote down vote up 
/**
 * Returns {@link RDFFormat#NTRIPLES}.
 */
@Override
public RDFFormat getRDFFormat() {
	return RDFFormat.NTRIPLES;
}
Example 4
Source File: NTriplesWriter.java    From rdf4j with BSD 3-Clause "New" or "Revised" License 4 votes vote down vote up 
@Override
public RDFFormat getRDFFormat() {
	return RDFFormat.NTRIPLES;
}
Example 5
Source File: NTriplesParser.java    From rdf4j with BSD 3-Clause "New" or "Revised" License 4 votes vote down vote up 
@Override
public RDFFormat getRDFFormat() {
	return RDFFormat.NTRIPLES;
}
Example 6
Source File: RdfSerializationExample.java    From Wikidata-Toolkit with Apache License 2.0 4 votes vote down vote up 
public static void main(String[] args) throws IOException {

		// Define where log messages go
		ExampleHelpers.configureLogging();

		// Print information about this program
		printDocumentation();

		// Initialize sites; only needed to link to Wikipedia pages in RDF
		DumpProcessingController dumpProcessingController = new DumpProcessingController(
				"wikidatawiki");
		dumpProcessingController.setOfflineMode(ExampleHelpers.OFFLINE_MODE);
		Sites sites = dumpProcessingController.getSitesInformation();

		// Prepare a compressed output stream to write the data to
		// (admittedly, this is slightly over-optimized for an example)
		try(OutputStream bufferedFileOutputStream = new BufferedOutputStream(
				ExampleHelpers.openExampleFileOuputStream("wikidata-simple-statements.nt.gz"),
				1024 * 1024 * 5
		)) {
			GzipParameters gzipParameters = new GzipParameters();
			gzipParameters.setCompressionLevel(7);
			OutputStream compressorOutputStream = new GzipCompressorOutputStream(
					bufferedFileOutputStream, gzipParameters);
			OutputStream exportOutputStream = asynchronousOutputStream(compressorOutputStream);

			// Create a serializer processor
			RdfSerializer serializer = new RdfSerializer(RDFFormat.NTRIPLES,
					exportOutputStream, sites,
					PropertyRegister.getWikidataPropertyRegister());
			// Serialize simple statements (and nothing else) for all items
			serializer.setTasks(RdfSerializer.TASK_ITEMS
					| RdfSerializer.TASK_SIMPLE_STATEMENTS);

			// Run serialization
			serializer.open();
			ExampleHelpers.processEntitiesFromWikidataDump(serializer);
			serializer.close();
		}

	}