org.apache.commons.rdf.api

Enum RDFSyntax

java.lang.Object

java.lang.Enum<RDFSyntax>

org.apache.commons.rdf.api.RDFSyntax

All Implemented Interfaces:

Serializable, Comparable<RDFSyntax>

public enum RDFSyntax
extends Enum<RDFSyntax>

Enumeration of the RDF 1.1 serialization syntaxes.

This enumeration lists the W3C standardized RDF 1.1 syntaxes like TURTLE and JSONLD. Note the existence of other RDF syntaxes that are not included here, e.g. N3 and TriX.

See Also:

RDF 1.1 Primer, RDFParser

Enum Constant Summary

Enum Constants

Enum Constant and Description
JSONLD JSON-LD 1.0
NQUADS RDF 1.1 N-Quads
NTRIPLES RDF 1.1 N-Triples
RDFA_HTML HTML+RDFa 1.1
RDFA_XHTML XHTML+RDFa 1.1
RDFXML RDF 1.1 XML Syntax
TRIG RDF 1.1 TriG
TURTLE RDF 1.1 Turtle

Field Summary

Fields

Modifier and Type	Field and Description
String	fileExtension The IANA-registered file extension.
String	mediaType The IANA media type for the RDF syntax.
boolean	supportsDataset Indicate if this RDF syntax supports RDF Datasets.

Method Summary

Modifier and Type	Method and Description
static Optional<RDFSyntax>	byFileExtension(String fileExtension) Return the RDFSyntax with the specified file extension.
static Optional<RDFSyntax>	byMediaType(String mediaType) Return the RDFSyntax with the specified media type.
String	toString() A human-readable name for the RDF syntax.
static RDFSyntax	valueOf(String name) Returns the enum constant of this type with the specified name.
static RDFSyntax[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

JSONLD

public static final RDFSyntax JSONLD

JSON-LD 1.0

See Also:

https://www.w3.org/TR/json-ld/

TURTLE

public static final RDFSyntax TURTLE

RDF 1.1 Turtle

See Also:

https://www.w3.org/TR/turtle/

NQUADS

public static final RDFSyntax NQUADS

RDF 1.1 N-Quads

See Also:

https://www.w3.org/TR/n-quads/

NTRIPLES

public static final RDFSyntax NTRIPLES

RDF 1.1 N-Triples

See Also:

https://www.w3.org/TR/n-triples/

RDFA_HTML

public static final RDFSyntax RDFA_HTML

HTML+RDFa 1.1

See Also:

https://www.w3.org/TR/html-rdfa/

RDFA_XHTML

public static final RDFSyntax RDFA_XHTML

XHTML+RDFa 1.1

See Also:

https://www.w3.org/TR/xhtml-rdfa/

RDFXML

public static final RDFSyntax RDFXML

RDF 1.1 XML Syntax

See Also:

https://www.w3.org/TR/rdf-syntax-grammar/

TRIG

public static final RDFSyntax TRIG

RDF 1.1 TriG

See Also:

https://www.w3.org/TR/trig/

Field Detail

mediaType

public final String mediaType

The IANA media type for the RDF syntax.

The media type can be used as part of Content-Type and Accept for content negotiation in the HTTP protocol.

fileExtension

public final String fileExtension

The IANA-registered file extension.

The file extension includes the leading period, e.g. .jsonld

supportsDataset

public final boolean supportsDataset

Indicate if this RDF syntax supports RDF Datasets.

Method Detail

values

public static RDFSyntax[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (RDFSyntax c : RDFSyntax.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static RDFSyntax valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null

toString

public String toString()

A human-readable name for the RDF syntax.

The name is equivalent to the the title of the corresponding W3C Specification.

Overrides:

toString in class Enum<RDFSyntax>

byMediaType

public static Optional<RDFSyntax> byMediaType(String mediaType)

Return the RDFSyntax with the specified media type.

The mediaType is compared in lower case, therefore it might not be equal to the mediaType of the returned RDFSyntax.

For convenience matching of media types used in a Content-Type header, if the mediaType contains the characters ;, , or white space, only the part of the string to the left of those characters are considered.

Parameters:

mediaType - The media type to match

Returns:

If Optional.isPresent(), the RDFSyntax which has a matching mediaType, otherwise Optional.empty() indicating that no matching syntax was found.

byFileExtension

public static Optional<RDFSyntax> byFileExtension(String fileExtension)

Return the RDFSyntax with the specified file extension.

The fileExtension is compared in lower case, therefore it might not be equal to the fileExtension of the returned RDFSyntax.

Parameters:

fileExtension - The fileExtension to match, starting with .

Returns:

If Optional.isPresent(), the RDFSyntax which has a matching fileExtension, otherwise Optional.empty() indicating that no matching file extension was found.