com.stardog.stark.io.jsonld

Class StreamingJSONLDWriter

java.lang.Object

com.stardog.stark.io.jsonld.StreamingJSONLDWriter

All Implemented Interfaces:

RDFHandler, RDFWriter

public class StreamingJSONLDWriter
extends Object
implements RDFWriter

Streaming writer for JSON-LD

Author:

Evren Sirin

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	StreamingJSONLDWriter.StreamingJSONLDWriterFactory Factory for creating StreamingJSONLDWriter

Field Summary

Fields

Modifier and Type	Field and Description
protected Resource	currentSubject
protected com.google.common.collect.Multimap<IRI,Value>	currentTriples
protected Map<String,String>	mNamespaces
protected boolean	mNamespacesWritten
protected Options	mOptions
protected boolean	mStarted
protected com.fasterxml.jackson.core.JsonGenerator	mWriter

Constructor Summary

Constructors

Constructor and Description
StreamingJSONLDWriter(OutputStream theWriter, Options theOptions)

Method Summary

Modifier and Type	Method and Description
protected void	closeActiveContext()
protected void	closePreviousStatement()
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.
protected String	formatIRI(IRI iri)
protected String	formatResource(Resource res)
void	handle(Statement theStmt) Write the given Statement
void	namespace(String thePrefix, String theIRI) Provide a namespace to the writer.
void	start() Signals that the RDF writing process is starting.
protected void	startActiveContext(Resource context)
protected void	writeLiteral(Literal literal)
protected void	writePredicateValues(IRI predicate, Collection<Value> values)
protected void	writePredicateValues(String predicate, Collection<Value> values, boolean onlyResources)
protected void	writeTypes(Collection<Value> types)
protected void	writeValue(Value theValue)

Methods inherited from class java.lang.Object

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

Field Detail

mWriter

protected final com.fasterxml.jackson.core.JsonGenerator mWriter

mOptions

protected final Options mOptions

mNamespaces

protected final Map<String,String> mNamespaces

mStarted

protected boolean mStarted

mNamespacesWritten

protected boolean mNamespacesWritten

currentSubject

protected Resource currentSubject

currentTriples

protected com.google.common.collect.Multimap<IRI,Value> currentTriples

Constructor Detail

StreamingJSONLDWriter

public StreamingJSONLDWriter(OutputStream theWriter,
                             Options theOptions)

Method Detail

start

public void start()

Signals that the RDF writing process is starting.

Specified by:

start in interface RDFHandler

Specified by:

start in interface RDFWriter

end

public void end()

Description copied from interface: RDFWriter

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

startActiveContext

protected void startActiveContext(Resource context)
                           throws IOException

Throws:

IOException

closeActiveContext

protected void closeActiveContext()
                           throws IOException

Throws:

IOException

comment

public void comment(@Nonnull
                    String theComment)

Description copied from interface: RDFWriter

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

handle

public void handle(@Nonnull
                   Statement theStmt)

Description copied from interface: RDFWriter

Write the given Statement

Specified by:

handle in interface RDFHandler

Specified by:

handle in interface RDFWriter

Parameters:

theStmt - the statement 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

closePreviousStatement

protected void closePreviousStatement()

writeTypes

protected void writeTypes(Collection<Value> types)
                   throws IOException

Throws:

IOException

writePredicateValues

protected void writePredicateValues(IRI predicate,
                                    Collection<Value> values)
                             throws IOException

Throws:

IOException

writePredicateValues

protected void writePredicateValues(String predicate,
                                    Collection<Value> values,
                                    boolean onlyResources)
                             throws IOException

Throws:

IOException

writeValue

protected void writeValue(@Nonnull
                          Value theValue)
                   throws IOException

Throws:

IOException

formatResource

protected String formatResource(Resource res)

formatIRI

protected String formatIRI(IRI iri)

writeLiteral

protected void writeLiteral(@Nonnull
                            Literal literal)
                     throws IOException

Throws:

IOException

format

@Nonnull
public RDFFormat format()

Description copied from interface: RDFWriter

The format this writer will serialize output in.

Specified by:

format in interface RDFWriter

Returns:

the format