Module org.apache.jena.arq

Package org.apache.jena.riot

Class RDFWriter

java.lang.Object

org.apache.jena.riot.RDFWriter

public class RDFWriter
extends Object

An RDFWriter is a process that will output triples or quads in an RDF syntax. RDFWriterBuilder provides the means to setup the writer.

The process is

    DatasetGraph dsg = ...
    RDFWriter writer = RDFWriter.create().source(dsg).lang(Lang.TTL).build();
    OutputStream out =
    writer.output(out);
 

or using abbreviated forms:

    RDFWriter.create().source(dsg).lang(Lang.TTL).output(out);
 

See Also:

• WriterDatasetRIOT
• WriterGraphRIOT

Method Summary

Modifier and Type	Method	Description
String	asString()	Write and return the output as a string.
static RDFWriterBuilder	create()	Create an RDFWriterBuilder.
void	output(OutputStream output)	Write the source to the OutputStream.
void	output(StringWriter javaWriter)	Write the source to a Java StringWriter.
void	output(Writer javaWriter)	Deprecated. Using Java Writers risks corruption because of mismatch of character set.
void	output(String filename)	Write the source to the file.
static RDFWriterBuilder	source(org.apache.jena.graph.Graph graph)	Create an RDFWriterBuilder and set the source of writing to the graph argument.
static RDFWriterBuilder	source(Dataset dataset)	Create an RDFWriterBuilder and set the source of writing to the graph argument.
static RDFWriterBuilder	source(org.apache.jena.rdf.model.Model model)	Create an RDFWriterBuilder and set the source of writing to the graph argument.
static RDFWriterBuilder	source(DatasetGraph dataset)	Create an RDFWriterBuilder and set the source of writing to the graph argument.
String	toString()	Write and return the output as a string.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Method Details

create

public static RDFWriterBuilder create()

Create an RDFWriterBuilder.

Often used in a pattern such as:

    RDFWriter.create()
        .lang(Lang.TTL)
        .source(graph)
        .output(System.out);
 

source

public static RDFWriterBuilder source(org.apache.jena.graph.Graph graph)

Create an RDFWriterBuilder and set the source of writing to the graph argument.

Parameters:

graph - A Graph.

Returns:

RDFWriterBuilder

source

public static RDFWriterBuilder source(org.apache.jena.rdf.model.Model model)

Create an RDFWriterBuilder and set the source of writing to the graph argument.

Parameters:

model - A Model.

Returns:

RDFWriterBuilder

source

public static RDFWriterBuilder source(DatasetGraph dataset)

Create an RDFWriterBuilder and set the source of writing to the graph argument.

Parameters:

dataset - A DatasetGraph.

Returns:

RDFWriterBuilder

source

public static RDFWriterBuilder source(Dataset dataset)

Create an RDFWriterBuilder and set the source of writing to the graph argument.

Parameters:

dataset - A Dataset.

Returns:

RDFWriterBuilder

asString

public String asString()

Write and return the output as a string.

The Lang or RDFFormat must have been set.

toString

public String toString()

Write and return the output as a string. This is the same as asString().

The Lang or RDFFormat must have been set.

Overrides:

toString in class Object

output

public void output(OutputStream output)

Write the source to the OutputStream.

The Lang or RDFFormat must have been set.

Parameters:

output -

output

@Deprecated
public void output(Writer javaWriter)

Deprecated.

Using Java Writers risks corruption because of mismatch of character set. Only UTF-8 is safe.

Write the source to the Java Writer.

The Lang or RDFFormat must have been set.

Parameters:

javaWriter -

output

public void output(StringWriter javaWriter)

Write the source to a Java StringWriter.

The Lang or RDFFormat must have been set.

Parameters:

javaWriter -

output

public void output(String filename)

Write the source to the file.

If neither Lang nor RDFFormat are set, an attempt to guess an RDF Syntax is made from the file extension.

Output to "-" goes to stdout.

Parameters:

filename -