Package org.eclipse.rdf4j.rio.turtle

Class TurtleWriter

java.lang.Object

org.eclipse.rdf4j.rio.helpers.AbstractRDFWriter

org.eclipse.rdf4j.rio.turtle.TurtleWriter

All Implemented Interfaces:

CharSink, Sink, RDFHandler, RDFWriter

Direct Known Subclasses:

TriGWriter, TurtleStarWriter

public class TurtleWriter
extends AbstractRDFWriter
implements CharSink

An implementation of the RDFWriter interface that writes RDF documents in Turtle format. The Turtle format is defined in in this document.

Field Summary

Fields

Modifier and Type	Field	Description
protected ParsedIRI	baseIRI
protected Model	bufferedStatements
protected IRI	lastWrittenPredicate
protected Resource	lastWrittenSubject
protected boolean	statementClosed	Flag indicating whether the last written statement has been closed.
protected IndentingWriter	writer

Fields inherited from class org.eclipse.rdf4j.rio.helpers.AbstractRDFWriter

namespaceTable, statementConsumer

Constructor Summary

Constructors

Constructor	Description
TurtleWriter(OutputStream out)	Creates a new TurtleWriter that will write to the supplied OutputStream.
TurtleWriter(OutputStream out, ParsedIRI baseIRI)	Creates a new TurtleWriter that will write to the supplied OutputStream.
TurtleWriter(Writer writer)	Creates a new TurtleWriter that will write to the supplied Writer.
TurtleWriter(Writer writer, ParsedIRI baseIRI)	Creates a new TurtleWriter that will write to the supplied Writer.

Method Summary

Modifier and Type	Method	Description
protected void	closePreviousStatement()
protected void	consumeStatement(Statement st)	Consume a statement.
void	endRDF()	Signals the end of the RDF data.
protected ModelFactory	getModelFactory()
RDFFormat	getRDFFormat()	Gets the RDF format that this RDFWriter uses.
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 void	handleStatementInternal(Statement st, boolean endRDFCalled, boolean canShortenSubjectBNode, boolean canShortenObjectBNode)	Internal method that differentiates between the pretty-print and streaming writer cases.
void	setModelFactory(ModelFactory modelFactory)	Set a ModelFactory to use for creating internal Models for statement processing/buffering purposes.
void	startRDF()	Signals the start of the RDF data.
protected void	writeBase(String baseURI)
protected void	writeBNode(BNode bNode)	Deprecated. Use writeBNode(BNode, boolean) instead.
protected void	writeBNode(BNode bNode, boolean canShorten)
protected void	writeCommentLine(String line)
protected void	writeLiteral(Literal lit)
protected void	writeNamespace(String prefix, String name)
protected void	writePredicate(IRI predicate)
protected void	writeResource(Resource res)	Deprecated. Use writeResource(Resource, boolean) instead.
protected void	writeResource(Resource res, boolean canShorten)	Writes a Resource, optionally shortening it if it is an IRI and has a namespace definition that is suitable for use in this context for shortening or a BNode that has been confirmed to be able to be shortened in this context.
protected void	writeStatement(Resource subj, IRI pred, Value obj, Resource context, boolean canShortenSubjectBNode, boolean canShortenObjectBNode)
protected void	writeTriple(Triple triple, boolean canShorten)
protected void	writeTripleRDFStar(Triple triple, boolean canShorten)
protected void	writeURI(IRI uri)
protected void	writeValue(Value val)	Deprecated. Use writeValue(Value, boolean) instead.
protected void	writeValue(Value val, boolean canShorten)	Writes a value, optionally shortening it if it is an IRI and has a namespace definition that is suitable for use in this context for shortening or a BNode that has been confirmed to be able to be shortened in this context.

Methods inherited from class org.eclipse.rdf4j.rio.helpers.AbstractRDFWriter

checkWritingStarted, getFileFormat, getWriterConfig, handleStatement, isWritingStarted, set, setWriterConfig

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.eclipse.rdf4j.common.io.Sink

acceptsFileFormat, getFileFormat

Field Detail

bufferedStatements

protected Model bufferedStatements

baseIRI

protected ParsedIRI baseIRI

writer

protected IndentingWriter writer

statementClosed

protected boolean statementClosed

Flag indicating whether the last written statement has been closed.

lastWrittenSubject

protected Resource lastWrittenSubject

lastWrittenPredicate

protected IRI lastWrittenPredicate

Constructor Detail

TurtleWriter

public TurtleWriter(OutputStream out)

Creates a new TurtleWriter that will write to the supplied OutputStream.

Parameters:

out - The OutputStream to write the Turtle document to.

TurtleWriter

public TurtleWriter(OutputStream out,
                    ParsedIRI baseIRI)

Creates a new TurtleWriter that will write to the supplied OutputStream.

Parameters:

out - The OutputStream to write the Turtle document to.

baseIRI -

TurtleWriter

public TurtleWriter(Writer writer)

Creates a new TurtleWriter that will write to the supplied Writer.

Parameters:

writer - The Writer to write the Turtle document to.

TurtleWriter

public TurtleWriter(Writer writer,
                    ParsedIRI baseIRI)

Creates a new TurtleWriter that will write to the supplied Writer.

Parameters:

writer - The Writer to write the Turtle document to.

baseIRI -

Method Detail

getWriter

public Writer getWriter()

Description copied from interface: CharSink

get the Writer used by this CharSink.

Specified by:

getWriter in interface CharSink

Returns:

an Writer

getRDFFormat

public RDFFormat getRDFFormat()

Description copied from interface: RDFWriter

Gets the RDF format that this RDFWriter uses.

Specified by:

getRDFFormat in interface RDFWriter

getSupportedSettings

public Collection<RioSetting<?>> getSupportedSettings()

Specified by:

getSupportedSettings in interface RDFWriter

Overrides:

getSupportedSettings in class AbstractRDFWriter

Returns:

A collection of RioSettings that are supported by this RDFWriter.

startRDF

public void startRDF()
              throws RDFHandlerException

Description copied from interface: RDFHandler

Signals the start of the RDF data. This method is called before any data is reported.

Specified by:

startRDF in interface RDFHandler

Overrides:

startRDF in class AbstractRDFWriter

Throws:

RDFHandlerException - If the RDF handler has encountered an unrecoverable error.

endRDF

public void endRDF()
            throws RDFHandlerException

Description copied from interface: RDFHandler

Signals the end of the RDF data. This method is called when all data has been reported.

Specified by:

endRDF in interface RDFHandler

Throws:

RDFHandlerException - If the RDF handler has encountered an unrecoverable error.

handleNamespace

public void handleNamespace(String prefix,
                            String name)
                     throws RDFHandlerException

Description copied from interface: RDFHandler

Handles a namespace declaration/definition. A namespace declaration associates a (short) prefix string with the namespace's URI. The prefix for default namespaces, which do not have an associated prefix, are represented as empty strings.

Specified by:

handleNamespace in interface RDFHandler

Overrides:

handleNamespace in class AbstractRDFWriter

Parameters:

prefix - The prefix for the namespace, or an empty string in case of a default namespace.

name - The URI that the prefix maps to.

Throws:

RDFHandlerException - If the RDF handler has encountered an unrecoverable error.

setModelFactory

public void setModelFactory(ModelFactory modelFactory)

Set a ModelFactory to use for creating internal Models for statement processing/buffering purposes.

Parameters:

modelFactory - a ModelFactory to use for internal buffering / statement processing purposes. May not be null.

getModelFactory

protected ModelFactory getModelFactory()

consumeStatement

protected 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-star conversion or encoding.

Overrides:

consumeStatement in class AbstractRDFWriter

Parameters:

st - the statement to consume.

Throws:

RDFHandlerException

handleStatementInternal

protected void handleStatementInternal(Statement st,
                                       boolean endRDFCalled,
                                       boolean canShortenSubjectBNode,
                                       boolean canShortenObjectBNode)

Internal method that differentiates between the pretty-print and streaming writer cases.

Parameters:

st - The next statement to write

endRDFCalled - True if endRDF has been called before this method is called. This is used to buffer statements for pretty-printing before dumping them when all statements have been delivered to us.

canShortenSubjectBNode - True if, in the current context, we may be able to shorten the subject of this statement iff it is an instance of BNode.

canShortenObjectBNode - True if, in the current context, we may be able to shorten the object of this statement iff it is an instance of BNode.

writeStatement

protected void writeStatement(Resource subj,
                              IRI pred,
                              Value obj,
                              Resource context,
                              boolean canShortenSubjectBNode,
                              boolean canShortenObjectBNode)
                       throws IOException

Throws:

IOException

handleComment

public void handleComment(String comment)
                   throws RDFHandlerException

Description copied from interface: RDFHandler

Handles a comment.

Specified by:

handleComment in interface RDFHandler

Parameters:

comment - The comment.

Throws:

RDFHandlerException - If the RDF handler has encountered an unrecoverable error.

writeCommentLine

protected void writeCommentLine(String line)
                         throws IOException

Throws:

IOException

writeBase

protected void writeBase(String baseURI)
                  throws IOException

Throws:

IOException

writeNamespace

protected void writeNamespace(String prefix,
                              String name)
                       throws IOException

Throws:

IOException

writePredicate

protected void writePredicate(IRI predicate)
                       throws IOException

Throws:

IOException

writeValue

@Deprecated
protected void writeValue(Value val)
                   throws IOException

Deprecated.

Use writeValue(Value, boolean) instead.

Parameters:

val - The Value to write.

Throws:

IOException

writeValue

protected void writeValue(Value val,
                          boolean canShorten)
                   throws IOException

Writes a value, optionally shortening it if it is an IRI and has a namespace definition that is suitable for use in this context for shortening or a BNode that has been confirmed to be able to be shortened in this context.

Parameters:

val - The Value to write.

canShorten - True if, in the current context, we can shorten this value if it is an instance of BNode .

Throws:

IOException

writeResource

@Deprecated
protected void writeResource(Resource res)
                      throws IOException

Deprecated.

Use writeResource(Resource, boolean) instead.

Parameters:

res - The Resource to write.

Throws:

IOException

writeResource

protected void writeResource(Resource res,
                             boolean canShorten)
                      throws IOException

Writes a Resource, optionally shortening it if it is an IRI and has a namespace definition that is suitable for use in this context for shortening or a BNode that has been confirmed to be able to be shortened in this context.

Parameters:

res - The Resource to write.

canShorten - True if, in the current context, we can shorten this value if it is an instance of BNode .

Throws:

IOException

writeURI

protected void writeURI(IRI uri)
                 throws IOException

Throws:

IOException

writeBNode

@Deprecated
protected void writeBNode(BNode bNode)
                   throws IOException

Deprecated.

Use writeBNode(BNode, boolean) instead.

Parameters:

bNode - The BNode to write.

Throws:

IOException

writeBNode

protected void writeBNode(BNode bNode,
                          boolean canShorten)
                   throws IOException

Throws:

IOException

writeTriple

protected void writeTriple(Triple triple,
                           boolean canShorten)
                    throws IOException

Throws:

IOException

writeTripleRDFStar

protected void writeTripleRDFStar(Triple triple,
                                  boolean canShorten)
                           throws IOException

Throws:

IOException

writeLiteral

protected void writeLiteral(Literal lit)
                     throws IOException

Throws:

IOException

closePreviousStatement

protected void closePreviousStatement()
                               throws IOException

Throws:

IOException