Package com.stardog.stark.query.io.json

Class AbstractSPARQLJSONWriter<T>

java.lang.Object

com.stardog.stark.query.io.json.AbstractSPARQLJSONWriter<T>

All Implemented Interfaces:

QueryResultWriter<T>, QueryResultHandler<T>

Direct Known Subclasses:

SPARQLJSONBooleanResultWriter, SPARQLJSONSelectResultWriter

public abstract class AbstractSPARQLJSONWriter<T>
extends Object
implements QueryResultWriter<T>

Since:

1.0

Version:

1.0

Author:

Michael Grove

Field Summary

Fields

Modifier and Type	Field	Description
protected boolean	documentOpen
protected boolean	firstTupleWritten
protected boolean	headerComplete
protected boolean	headerOpen
protected final com.fasterxml.jackson.core.JsonGenerator	jg
protected boolean	linksFound
protected final Options	mOptions
protected boolean	tupleVariablesFound

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AbstractSPARQLJSONWriter(OutputStream theOutput, Options theOptions)

Method Summary

Modifier and Type	Method	Description
void	end()	Signal that query processing has completed
protected void	endHeader()
QueryResultFormat	format()	The format this writer will serialize output in
void	links(List<String> theLinks)	Handle the set of links from the result
void	namespace(String thePrefix, String theIRI)
void	start()	Indicates that writing has begun.
protected void	startHeader()
protected void	writeHeaderFields()
protected void	writeValue(Value value)

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.stardog.stark.query.io.QueryResultWriter

handle

Field Details

jg

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

mOptions

protected final Options mOptions

firstTupleWritten

protected boolean firstTupleWritten

documentOpen

protected boolean documentOpen

headerOpen

protected boolean headerOpen

headerComplete

protected boolean headerComplete

tupleVariablesFound

protected boolean tupleVariablesFound

linksFound

protected boolean linksFound

Constructor Details

AbstractSPARQLJSONWriter

protected AbstractSPARQLJSONWriter(@Nonnull
 OutputStream theOutput,
 @Nonnull
 Options theOptions)

Method Details

start

public void start()

Indicates that writing has begun.

Specified by:

start in interface QueryResultHandler<T>

Specified by:

start in interface QueryResultWriter<T>

links

public void links(@Nonnull
 List<String> theLinks)

Handle the set of links from the result

Specified by:

links in interface QueryResultHandler<T>

Specified by:

links in interface QueryResultWriter<T>

Parameters:

theLinks - The links

See Also:

• "link"

namespace

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

Specified by:

namespace in interface QueryResultWriter<T>

Throws:

ResultWritingFailed

end

public void end()

Signal that query processing has completed

Specified by:

end in interface QueryResultHandler<T>

Specified by:

end in interface QueryResultWriter<T>

startHeader

protected void startHeader()

writeHeaderFields

protected void writeHeaderFields()
                          throws IOException

Throws:

IOException

endHeader

protected void endHeader()

writeValue

protected void writeValue(@Nonnull
 Value value)
                   throws IOException

Throws:

IOException

format

@Nonnull
public QueryResultFormat format()

The format this writer will serialize output in

Specified by:

format in interface QueryResultWriter<T>

Returns:

the format