Class NQuadsWriter

java.lang.Object

org.eclipse.rdf4j.rio.helpers.AbstractRDFWriter

org.eclipse.rdf4j.rio.ntriples.NTriplesWriter

org.eclipse.rdf4j.rio.nquads.NQuadsWriter

All Implemented Interfaces:

CharSink, Sink, RDFHandler, RDFWriter

public class NQuadsWriter
extends NTriplesWriter

RDFWriter implementation for the N-Quads RDF format.

Author:

Joshua Shinavier

Field Summary

Fields inherited from class NTriplesWriter

writer

Modifier and Type	Field	Description
protected final Writer	writer

Fields inherited from class AbstractRDFWriter

namespaceTable, statementConsumer

Modifier and Type	Field	Description
protected Map<String,String>	namespaceTable	Mapping from namespace prefixes to namespace names.
protected Consumer<Statement>	statementConsumer

Constructor Summary

Constructors

Constructor	Description
NQuadsWriter(OutputStream outputStream)
NQuadsWriter(Writer writer)

Method Summary

Modifier and Type	Method	Description
void	consumeStatement(Statement st)	Consume a statement.
RDFFormat	getRDFFormat()	Gets the RDF format that this RDFWriter uses.

Methods inherited from class NTriplesWriter

endRDF, getSupportedSettings, getWriter, handleComment, handleNamespace, requiresVersionAnnouncement, startRDF, writeValue, writeVersionAnnouncement

Modifier and Type	Method	Description
void	endRDF()	Signals the end of the RDF data.
final Collection<RioSetting<?>>	getSupportedSettings()
Writer	getWriter()	get the Writer used by this CharSink.
void	handleComment(String comment)	Handles a comment.
void	handleNamespace(String prefix, String name)	Handles a namespace declaration/definition.
protected boolean	requiresVersionAnnouncement()	Override to return true for writers where an inline version announcement is mandatory when RDF 1.2-specific features are serialised (Turtle, TriG, N3, N-Triples, N-Quads).
void	startRDF()	Signals the start of the RDF data.
protected void	writeValue(Value value)	Writes the N-Triples representation of the given Value.
protected void	writeVersionAnnouncement()	Writes the N-Triples / N-Quads version directive as the very first output line once an RDF 1.2 feature is detected.

Methods inherited from class AbstractRDFWriter

checkWritingStarted, ensureVersionAnnouncement, getFileFormat, getWriterConfig, handleStatement, isRdf12Feature, isRdf12FeatureDetected, isVersionAnnouncementWritten, isWritingStarted, noteRdf12Feature, prepareForVersionAnnouncement, set, setWriterConfig

Modifier and Type	Method	Description
protected void	checkWritingStarted()	Verify that writing has started.
protected final void	ensureVersionAnnouncement()	Emits the version announcement if — and only if — all of the following hold: at least one RDF 1.2 feature has been observed (AbstractRDFWriter.noteRdf12Feature(Value...)); the announcement has not been written yet; AbstractRDFWriter.requiresVersionAnnouncement() returns true. Calls AbstractRDFWriter.prepareForVersionAnnouncement() before writing to let writers close any open output structure first.
FileFormat	getFileFormat()	Get the FileFormat this sink uses.
WriterConfig	getWriterConfig()	Retrieves the current writer configuration as a single object.
void	handleStatement(Statement st)	Handles a statement.
static boolean	isRdf12Feature(Value v)	Returns true if the given Value requires an RDF 1.2 version announcement (i.e. it is a triple term or a directional language-tagged literal).
protected boolean	isRdf12FeatureDetected()	Returns true if at least one RDF 1.2-specific feature has been noted so far.
protected boolean	isVersionAnnouncementWritten()	Returns true if the version announcement has already been written to the output stream.
protected boolean	isWritingStarted()	See if writing has started
protected void	noteRdf12Feature(Value... values)	Records that an RDF 1.2-specific feature was observed in values.
protected void	prepareForVersionAnnouncement()	Called by AbstractRDFWriter.ensureVersionAnnouncement() immediately before AbstractRDFWriter.writeVersionAnnouncement().
<T> RDFWriter	set(RioSetting<T> setting, T value)	Set a setting on the writer, and return this writer object to allow chaining.
RDFWriter	setWriterConfig(WriterConfig config)	Sets all supplied writer configuration options.

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface Sink

acceptsFileFormat

Modifier and Type	Method	Description
default boolean	acceptsFileFormat(FileFormat format)	Check if this Sink accepts the supplied FileFormat.

Constructor Details

NQuadsWriter

public NQuadsWriter(OutputStream outputStream)

NQuadsWriter

public NQuadsWriter(Writer writer)

Method Details

getRDFFormat

public RDFFormat getRDFFormat()

Description copied from interface: RDFWriter

Gets the RDF format that this RDFWriter uses.

Specified by:

getRDFFormat in interface RDFWriter

Overrides:

getRDFFormat in class NTriplesWriter

consumeStatement

public void consumeStatement(Statement st)
                      throws RDFHandlerException

Description copied from class: AbstractRDFWriter

Consume a statement.

Extending classes must override this method instead of overriding AbstractRDFWriter.handleStatement(Statement) in order to benefit from automatic handling of RDF 1.2 conversion or encoding.

Overrides:

consumeStatement in class NTriplesWriter

Parameters:

st - the statement to consume.

Throws:

RDFHandlerException