Package com.stardog.stark.io.rdfjson

Class RDFJSONWriter

java.lang.Object

com.stardog.stark.io.rdfjson.RDFJSONWriter

All Implemented Interfaces:

RDFHandler, RDFWriter

public final class RDFJSONWriter
extends Object
implements RDFWriter

Writer for RDF in RDF/JSON format

Since:

1.0

Version:

1.0

Author:

Peter Ansell, Michael Grove

See Also:

• RDFFormats.RDFJSON

Implementation Notes:

This class buffers the written statements until the end() so it is not suitable for writing large graphs.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final class	RDFJSONWriter.RDFJSONWriterFactory	Factory for RDFJSONWriter

Constructor Summary

Constructors

Constructor	Description
RDFJSONWriter(OutputStream theStream, Options theOptions)

Method Summary

Modifier and Type	Method	Description
void	comment(String theComment)	Write a comment to the output.
void	end()	Signals the writing process is completed.
RDFFormat	format()	The format this writer will serialize output in.
void	handle(Statement theStmt)	Write the given Statement
void	namespace(String thePrefix, String theIRI)	Provide a namespace to the writer.
static String	resourceToString(Resource uriOrBnode)	Returns the correct syntax for a Resource, depending on whether it is a URI or a Blank Node (ie, BNode)
void	start()	Signals that the RDF writing process is starting.

Methods inherited from class java.lang.Object

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

Constructor Details

RDFJSONWriter

public RDFJSONWriter(@Nonnull
 OutputStream theStream,
 @Nonnull
 Options theOptions)

Method Details

end

public void end()

Signals the writing process is completed. The underlying InputStream is *not* closed, but the caller should not call additional methods on this writer as that will normally yield syntax errors in the output.

Specified by:

end in interface RDFHandler

Specified by:

end in interface RDFWriter

comment

public void comment(@Nonnull
 String theComment)

Write a comment to the output. Writing need not be started at this point; comments can be written prior to any actual serialized RDF

Specified by:

comment in interface RDFWriter

Parameters:

theComment - the comment to write

namespace

public void namespace(@Nonnull
 String thePrefix,
 @Nonnull
 String theIRI)

Provide a namespace to the writer. This method can be called before writing has started, in which case, the namespace bindings are buffered and written when appropriate after writing has begun.

Specified by:

namespace in interface RDFHandler

Specified by:

namespace in interface RDFWriter

Parameters:

thePrefix - the namespace prefix

theIRI - the associated IRI

handle

public void handle(@Nonnull
 Statement theStmt)

Write the given Statement

Specified by:

handle in interface RDFHandler

Specified by:

handle in interface RDFWriter

Parameters:

theStmt - the statement to write

start

public void start()

Signals that the RDF writing process is starting.

Specified by:

start in interface RDFHandler

Specified by:

start in interface RDFWriter

resourceToString

public static String resourceToString(Resource uriOrBnode)

Returns the correct syntax for a Resource, depending on whether it is a URI or a Blank Node (ie, BNode)

Parameters:

uriOrBnode - The resource to serialise to a string

Returns:

The string value of the sesame resource

format

@Nonnull
public RDFFormat format()

The format this writer will serialize output in.

Specified by:

format in interface RDFWriter

Returns:

the format