Package org.eclipse.rdf4j.rio.helpers

Class RDFStarUtil

java.lang.Object

org.eclipse.rdf4j.rio.helpers.RDFStarUtil

public class RDFStarUtil
extends Object

Utility methods for RDF-star triples.

Author:

Pavel Mihaylov

Field Summary

Fields

Modifier and Type	Field	Description
static final String	TRIPLE_PREFIX	IRI prefix for RDF-star triples encoded as IRIs.

Constructor Summary

Constructors

Constructor	Description
RDFStarUtil()

Method Summary

Modifier and Type	Method	Description
static <T extends Value> T	fromRDFEncodedValue(T encodedValue)	Converts the supplied value from an RDF-compatible representation to an RDF-star value.
static <T extends Value> T	fromRDFEncodedValue(T encodedValue, ValueFactory valueFactory)	Converts the supplied value from an RDF-compatible representation to an RDF-star value.
static boolean	isEncodedTriple(Value value)	Checks if the supplied Value represents an RDF-star triple encoded as an IRI.
static <T extends Value> T	toRDFEncodedValue(T value)	Converts the supplied value from RDF-star to an RDF-compatible representation.

Methods inherited from class java.lang.Object

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

Field Details

TRIPLE_PREFIX

public static final String TRIPLE_PREFIX

IRI prefix for RDF-star triples encoded as IRIs.

See Also:

• Constant Field Values

Constructor Details

RDFStarUtil

public RDFStarUtil()

Method Details

toRDFEncodedValue

public static <T extends Value> T toRDFEncodedValue(T value)

Converts the supplied value from RDF-star to an RDF-compatible representation.

RDF-star triples are encoded as IRIs that start with TRIPLE_PREFIX, followed by the base64 encoding of the N-Triples serialization of the triple.

All other RDF-star values are valid in RDF as well and remain unchanged.

Type Parameters:

T -

Parameters:

value - a RDF-star Value to encode.

Returns:

the RDF-compatible encoded value, if a Triple was supplied, or the supplied value otherwise.

fromRDFEncodedValue

public static <T extends Value> T fromRDFEncodedValue(T encodedValue)

Converts the supplied value from an RDF-compatible representation to an RDF-star value.

See toRDFEncodedValue(Value).

Type Parameters:

T -

Parameters:

encodedValue - an RDF Value to convert to RDF-star.

Returns:

the decoded RDF-star triple, if a Triple encoded as IRI was supplied, or the supplied value otherwise.

Throws:

IllegalArgumentException - if the supplied value looked like an RDF-star triple encoded as an IRI but it could not be decoded successfully.

fromRDFEncodedValue

public static <T extends Value> T fromRDFEncodedValue(T encodedValue,
 ValueFactory valueFactory)

Converts the supplied value from an RDF-compatible representation to an RDF-star value.

See toRDFEncodedValue(Value).

Type Parameters:

T -

Parameters:

encodedValue - an RDF Value to convert to RDF-star.

valueFactory - the ValueFactory to use for parsing the triple.

Returns:

the decoded RDF-star triple, if a Triple encoded as IRI was supplied, or the supplied value otherwise.

Throws:

IllegalArgumentException - if the supplied value looked like an RDF-star triple encoded as an IRI but it could not be decoded successfully.

isEncodedTriple

public static boolean isEncodedTriple(Value value)

Checks if the supplied Value represents an RDF-star triple encoded as an IRI.

Parameters:

value - the value to check.

Returns:

True if the value is an RDF-star triple encoded as an IRI, false otherwise.