RDF Serializers

The RDF serializers convert POJOs into RDF representations. The module provides both character-based serializers (text formats) and stream-based serializers (RDF/THRIFT and RDF/PROTO binary formats).

Text-Based Serializers

Class	Format	Output
RdfXmlSerializer	RDF/XML	String
RdfXmlAbbrevSerializer	RDF/XML Abbreviated	String
RdfJsonSerializer	RDF/JSON	String
NTripleSerializer	N-Triples (W3C)	String
TurtleSerializer	Turtle (W3C)	String
N3Serializer	N3 (Notation3)	String
NQuadsSerializer	N-Quads	String
TriGSerializer	TriG	String
TriXSerializer	TriX (XML)	String
JsonLdSerializer	JSON-LD (W3C)	String

Binary Serializers

Class	Format	Output
RdfThriftSerializer	RDF/THRIFT	byte[]
RdfProtoSerializer	RDF/PROTO	byte[]

Usage

// RDF/XML
String xml = RdfXmlSerializer.DEFAULT.write(bean);
String xml2 = RdfXml.of(bean);

// Turtle, N-Triples, N3
String turtle = TurtleSerializer.DEFAULT.write(bean);
String turtle2 = Turtle.of(bean);
String nTriples = NTriple.of(bean);
String n3 = N3.of(bean);

// N-Quads, TriG, TriX (datasets / named graphs)
String nQuads = NQuads.of(bean);
String triG = TriG.of(bean);
String triX = TriX.of(bean);

// JSON-LD
String jsonLd = JsonLdSerializer.DEFAULT.write(bean);
String jsonLd2 = JsonLd.of(bean);

// RDF/THRIFT and RDF/PROTO binary
byte[] thrift = RdfThrift.of(bean);
byte[] proto = RdfProto.of(bean);

Custom Configuration

All RDF serializers extend the standard Juneau serializer hierarchy and support the same builder options (swaps, bean filters, etc.):

RdfXmlSerializer s = RdfXmlSerializer.create()
    .swaps(DateSwap.class)
    .build();

TurtleSerializer s2 = TurtleSerializer.create()
    .swaps(DateSwap.class)
    .build();

RdfThriftSerializer s3 = RdfThriftSerializer.create()
    .swaps(MyCustomSwap.class)
    .build();

Media Types

Serializer	Produces
RdfXmlSerializer	application/rdf+xml
RdfXmlAbbrevSerializer	application/rdf+xml
RdfJsonSerializer	application/rdf+json
NTripleSerializer	text/n-triple
TurtleSerializer	text/turtle
N3Serializer	text/n3
NQuadsSerializer	application/n-quads
TriGSerializer	application/trig
TriXSerializer	application/trix+xml
JsonLdSerializer	application/ld+json
RdfThriftSerializer	application/vnd.apache.thrift.binary
RdfProtoSerializer	application/vnd.apache.protobuf

See Also

• RDF Basics for quick start and format overview.
• RDF Parsers for parsing RDF into POJOs.