org.openrdf.rio.turtle
Class TurtleWriter

java.lang.Object
  org.openrdf.rio.turtle.TurtleWriter

All Implemented Interfaces:

RDFHandler, RDFWriter

Direct Known Subclasses:

TriGWriter

public class TurtleWriter
extends Object
implements RDFWriter

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

Field Summary

protected URI	lastWrittenPredicate
protected Resource	lastWrittenSubject
protected Map<String,String>	namespaceTable Table mapping namespace names (key) to namespace prefixes (value).
protected boolean	statementClosed Flag indicating whether the last written statement has been closed.
protected IndentingWriter	writer
protected boolean	writingStarted

Constructor Summary

TurtleWriter(OutputStream out)
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.

Method Summary

protected void	closePreviousStatement()
void	endRDF() Signals the end of the RDF data.
RDFFormat	getRDFFormat() Gets the RDF format that this RDFWriter uses.
void	handleComment(String comment) Handles a comment.
void	handleNamespace(String prefix, String name) Handles a namespace declaration/definition.
void	handleStatement(Statement st) Handles a statement.
void	startRDF() Signals the start of the RDF data.
protected void	writeBNode(BNode bNode)
protected void	writeCommentLine(String line)
protected void	writeLiteral(Literal lit)
protected void	writeNamespace(String prefix, String name)
protected void	writePredicate(URI predicate)
protected void	writeResource(Resource res)
protected void	writeURI(URI uri)
protected void	writeValue(Value val)

Methods inherited from class java.lang.Object

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

Field Detail

writer

protected IndentingWriter writer

namespaceTable

protected Map<String,String> namespaceTable

Table mapping namespace names (key) to namespace prefixes (value).

writingStarted

protected boolean writingStarted

statementClosed

protected boolean statementClosed

Flag indicating whether the last written statement has been closed.

lastWrittenSubject

protected Resource lastWrittenSubject

lastWrittenPredicate

protected URI 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(Writer writer)

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

Parameters:

writer - The Writer to write the Turtle document to.

Method Detail

getRDFFormat

public RDFFormat getRDFFormat()

Description copied from interface: RDFWriter

Gets the RDF format that this RDFWriter uses.

Specified by:

getRDFFormat in interface 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

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

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.

handleStatement

public void handleStatement(Statement st)
                     throws RDFHandlerException

Description copied from interface: RDFHandler

Handles a statement.

Specified by:

handleStatement in interface RDFHandler

Parameters:

st - The statement.

Throws:

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

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

writeNamespace

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

Throws:

IOException

writePredicate

protected void writePredicate(URI predicate)
                       throws IOException

Throws:

IOException

writeValue

protected void writeValue(Value val)
                   throws IOException

Throws:

IOException

writeResource

protected void writeResource(Resource res)
                      throws IOException

Throws:

IOException

writeURI

protected void writeURI(URI uri)
                 throws IOException

Throws:

IOException

writeBNode

protected void writeBNode(BNode bNode)
                   throws IOException

Throws:

IOException

writeLiteral

protected void writeLiteral(Literal lit)
                     throws IOException

Throws:

IOException

closePreviousStatement

protected void closePreviousStatement()
                               throws IOException

Throws:

IOException