org.eclipse.rdf4j.rio.rdfjson

Class RDFJSONWriter

java.lang.Object

org.eclipse.rdf4j.rio.helpers.AbstractRDFWriter

org.eclipse.rdf4j.rio.rdfjson.RDFJSONWriter

All Implemented Interfaces:

CharSink, Sink, RDFHandler, RDFWriter

public class RDFJSONWriter
extends AbstractRDFWriter
implements RDFWriter, CharSink

RDFWriter implementation for the RDF/JSON format

Author:

Peter Ansell p_ansell@yahoo.com

Field Summary

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

namespaceTable, statementConsumer

Constructor Summary

Constructors

Constructor and Description
RDFJSONWriter(OutputStream out, RDFFormat actualFormat)
RDFJSONWriter(Writer writer, RDFFormat actualFormat)

Method Summary

Modifier and Type	Method and Description
void	consumeStatement(org.eclipse.rdf4j.model.Statement statement)
void	endRDF()
RDFFormat	getRDFFormat()
Collection<RioSetting<?>>	getSupportedSettings()
Writer	getWriter()
void	handleComment(String comment)
void	handleNamespace(String prefix, String uri)
static void	modelToRdfJsonInternal(org.eclipse.rdf4j.model.Model graph, WriterConfig writerConfig, com.fasterxml.jackson.core.JsonGenerator jg)
static String	resourceToString(org.eclipse.rdf4j.model.Resource uriOrBnode) Returns the correct syntax for a Resource, depending on whether it is a URI or a Blank Node (ie, BNode)
void	startRDF()
static void	writeObject(org.eclipse.rdf4j.model.Value object, Set<org.eclipse.rdf4j.model.Resource> contexts, com.fasterxml.jackson.core.JsonGenerator jg) Helper method to reduce complexity of the JSON serialisation algorithm Any null contexts will only be serialised to JSON if there are also non-null contexts in the contexts array

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.rio.RDFWriter

getWriterConfig, set, setWriterConfig

Methods inherited from interface org.eclipse.rdf4j.rio.RDFHandler

handleStatement

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

acceptsFileFormat, getFileFormat

Constructor Detail

RDFJSONWriter

public RDFJSONWriter(OutputStream out,
                     RDFFormat actualFormat)

RDFJSONWriter

public RDFJSONWriter(Writer writer,
                     RDFFormat actualFormat)

Method Detail

getWriter

public Writer getWriter()

Specified by:

getWriter in interface CharSink

startRDF

public void startRDF()
              throws RDFHandlerException

Specified by:

startRDF in interface RDFHandler

Overrides:

startRDF in class AbstractRDFWriter

Throws:

RDFHandlerException

endRDF

public void endRDF()
            throws RDFHandlerException

Specified by:

endRDF in interface RDFHandler

Throws:

RDFHandlerException

getRDFFormat

public RDFFormat getRDFFormat()

Specified by:

getRDFFormat in interface RDFWriter

getSupportedSettings

public Collection<RioSetting<?>> getSupportedSettings()

Specified by:

getSupportedSettings in interface RDFWriter

Overrides:

getSupportedSettings in class AbstractRDFWriter

handleComment

public void handleComment(String comment)
                   throws RDFHandlerException

Specified by:

handleComment in interface RDFHandler

Throws:

RDFHandlerException

handleNamespace

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

Specified by:

handleNamespace in interface RDFHandler

Overrides:

handleNamespace in class AbstractRDFWriter

Throws:

RDFHandlerException

consumeStatement

public void consumeStatement(org.eclipse.rdf4j.model.Statement statement)
                      throws RDFHandlerException

Overrides:

consumeStatement in class AbstractRDFWriter

Throws:

RDFHandlerException

writeObject

public static void writeObject(org.eclipse.rdf4j.model.Value object,
                               Set<org.eclipse.rdf4j.model.Resource> contexts,
                               com.fasterxml.jackson.core.JsonGenerator jg)
                        throws com.fasterxml.jackson.core.JsonGenerationException,
                               IOException

Helper method to reduce complexity of the JSON serialisation algorithm Any null contexts will only be serialised to JSON if there are also non-null contexts in the contexts array

Parameters:

object - The RDF value to serialise

contexts - The set of contexts that are relevant to this object, including null contexts as they are found.

jg - the JsonGenerator to write to.

Throws:

IOException

com.fasterxml.jackson.core.JsonGenerationException

resourceToString

public static String resourceToString(org.eclipse.rdf4j.model.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

modelToRdfJsonInternal

public static void modelToRdfJsonInternal(org.eclipse.rdf4j.model.Model graph,
                                          WriterConfig writerConfig,
                                          com.fasterxml.jackson.core.JsonGenerator jg)
                                   throws IOException

Throws:

IOException