RDF Parsers

The RDF parsers convert RDF input (text or binary) into POJOs. The module provides character-based parsers for all text RDF formats and stream-based parsers for RDF/THRIFT and RDF/PROTO binary formats.

Text-Based Parsers

Class	Format	Input
RdfXmlParser	RDF/XML	String, Reader
RdfJsonParser	RDF/JSON	String, Reader
NTripleParser	N-Triples	String, Reader
TurtleParser	Turtle	String, Reader
N3Parser	N3 (Notation3)	String, Reader
NQuadsParser	N-Quads	String, Reader
TriGParser	TriG	String, Reader
TriXParser	TriX (XML)	String, Reader
JsonLdParser	JSON-LD	String, Reader

Binary Parsers

Class	Format	Input
RdfThriftParser	RDF/THRIFT	byte[], InputStream
RdfProtoParser	RDF/PROTO	byte[], InputStream

Usage

// RDF/XML
MyBean bean = RdfXmlParser.DEFAULT.read(rdfXmlString, MyBean.class);
MyBean bean2 = RdfXml.to(rdfXmlString, MyBean.class);

// Turtle, N-Triples, N3
MyBean fromTurtle = TurtleParser.DEFAULT.read(turtleString, MyBean.class);
MyBean fromTurtle2 = Turtle.to(turtleString, MyBean.class);
MyBean fromNTriples = NTriple.to(nTriplesString, MyBean.class);
MyBean fromN3 = N3.to(n3String, MyBean.class);

// N-Quads, TriG, TriX
MyBean fromNQuads = NQuads.to(nQuadsString, MyBean.class);
MyBean fromTriG = TriG.to(triGString, MyBean.class);
MyBean fromTriX = TriX.to(triXString, MyBean.class);

// JSON-LD
MyBean fromJsonLd = JsonLdParser.DEFAULT.read(jsonLdString, MyBean.class);
MyBean fromJsonLd2 = JsonLd.to(jsonLdString, MyBean.class);

// RDF/THRIFT and RDF/PROTO binary
MyBean fromThrift = RdfThrift.to(thriftBytes, MyBean.class);
MyBean fromProto = RdfProto.to(protoBytes, MyBean.class);

// Generic maps (specify key/value types)
Map<String,String> map = RdfThrift.to(bytes, Map.class, String.class, String.class);

Date/Time Parsing

RDF parsers use Juneau's built-in ISO 8601 support. Date/time and duration types in RDF literals are parsed via Iso8601Utils.parse() and converted to the target property type (Calendar, Instant, ZonedDateTime, Duration, etc.).

Custom Configuration

All RDF parsers support the standard Juneau parser builder options:

RdfXmlParser p = RdfXmlParser.create()
    .swaps(DateSwap.class)
    .build();

TurtleParser p2 = TurtleParser.create()
    .swaps(DateSwap.class)
    .build();

RdfThriftParser p3 = RdfThriftParser.create()
    .swaps(MyCustomSwap.class)
    .build();

Media Types

Parser	Accepts
RdfXmlParser	application/rdf+xml, application/xml, text/xml
RdfJsonParser	application/rdf+json, application/json
NTripleParser	text/n-triple
TurtleParser	text/turtle
N3Parser	text/n3
NQuadsParser	application/n-quads
TriGParser	application/trig
TriXParser	application/trix+xml
JsonLdParser	application/ld+json
RdfThriftParser	application/vnd.apache.thrift.binary
RdfProtoParser	application/vnd.apache.protobuf

See Also

• RDF Basics for quick start and format overview.
• RDF Serializers for serializing POJOs to RDF.