Class JsonLdLiteralImpl

java.lang.Object

org.apache.commons.rdf.jsonldjava.JsonLdTermImpl

org.apache.commons.rdf.jsonldjava.JsonLdLiteralImpl

All Implemented Interfaces:

Literal, RDFTerm, JsonLdLiteral, JsonLdTerm

class JsonLdLiteralImpl
extends JsonLdTermImpl
implements JsonLdLiteral

Field Summary

Fields inherited from class JsonLdTermImpl

node

Constructor Summary

Constructors

Constructor	Description
JsonLdLiteralImpl(com.github.jsonldjava.core.RDFDataset.Node node)

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object obj)	Check it this RDFTerm is equal to another RDFTerm.
IRI	getDatatype()	The IRI identifying the datatype that determines how the lexical form maps to a literal value.
Optional<String>	getLanguageTag()	If and only if the datatype IRI is http://www.w3.org/1999/02/22-rdf-syntax-ns#langString, the language tag for this Literal is a non-empty language tag as defined by BCP47. If the datatype IRI is not http://www.w3.org/1999/02/22-rdf-syntax-ns#langString, this method must return Optional.empty().
String	getLexicalForm()	The lexical form of this literal, represented by a Unicode string.
int	hashCode()	Calculate a hash code for this RDFTerm.
private static String	lowerCase(String langTag)
String	ntriplesString()	Return the term serialised as specified by the RDF-1.1 N-Triples Canonical form.

Methods inherited from class JsonLdTermImpl

asJsonLdNode, toString

Methods inherited from class Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface JsonLdTerm

asJsonLdNode

Constructor Details

JsonLdLiteralImpl

JsonLdLiteralImpl(com.github.jsonldjava.core.RDFDataset.Node node)

Method Details

lowerCase

private static String lowerCase(String langTag)

ntriplesString

public String ntriplesString()

Description copied from interface: RDFTerm

Return the term serialised as specified by the RDF-1.1 N-Triples Canonical form.

Specified by:

ntriplesString in interface RDFTerm

Returns:

The term serialised as RDF-1.1 N-Triples.

See Also:

• RDF-1.1 N-Triples Canonical form

getLexicalForm

public String getLexicalForm()

Description copied from interface: Literal

The lexical form of this literal, represented by a Unicode string.

Specified by:

getLexicalForm in interface Literal

Returns:

The lexical form of this literal.

See Also:

• RDF-1.1 Literal lexical form

getDatatype

public IRI getDatatype()

Description copied from interface: Literal

The IRI identifying the datatype that determines how the lexical form maps to a literal value. If the datatype IRI is http://www.w3.org/1999/02/22-rdf-syntax-ns#langString, Literal.getLanguageTag() must not return Optional.empty(), and it must return a valid BCP47 language tag.

Specified by:

getDatatype in interface Literal

Returns:

The datatype IRI for this literal.

See Also:

• RDF-1.1 Literal datatype IRI

getLanguageTag

public Optional<String> getLanguageTag()

Description copied from interface: Literal

If and only if the datatype IRI is http://www.w3.org/1999/02/22-rdf-syntax-ns#langString, the language tag for this Literal is a non-empty language tag as defined by BCP47.
If the datatype IRI is not http://www.w3.org/1999/02/22-rdf-syntax-ns#langString, this method must return Optional.empty().

The value space of language tags is always in lower case; although RDF implementations MAY convert all language tags to lower case, safe comparisons of language tags should be done using String.toLowerCase(Locale) with the locale Locale.ROOT.

Implementation note: If your application requires Serializable objects, it is best not to store an Optional in a field. It is recommended to use Optional.ofNullable(Object) to create the return value for this method.

Specified by:

getLanguageTag in interface Literal

Returns:

The Optional language tag for this literal. If Optional.isPresent() returns true, the value returned by Optional.get() must be a non-empty language tag string conforming to BCP47.

See Also:

• RDF-1.1 Literal language tag

hashCode

public int hashCode()

Description copied from interface: RDFTerm

Calculate a hash code for this RDFTerm.

As an RDFTerm is immutable, this method will always return the same hashCode over the lifetime of this object.

This method MUST be implemented in conjunction with RDFTerm.equals(Object) so that two equal RDFTerm produce the same hash code.

Specified by:

hashCode in interface Literal

Specified by:

hashCode in interface RDFTerm

Overrides:

hashCode in class Object

Returns:

a hash code value for this RDFTerm.

See Also:

• IRI.hashCode()
• Literal.hashCode()
• BlankNode.hashCode()

equals

public boolean equals(Object obj)

Description copied from interface: RDFTerm

Check it this RDFTerm is equal to another RDFTerm.

If this object is an IRI, equality is checked using IRI.equals(Object), or if this object is a BlankNode, equality is checked using BlankNode.equals(Object), or if this object is a Literal, equality is checked using Literal.equals(Object).

Implementations MUST also override RDFTerm.hashCode() so that two equal Literals produce the same hash code.

Specified by:

equals in interface Literal

Specified by:

equals in interface RDFTerm

Overrides:

equals in class Object

Parameters:

obj - Another object

Returns:

true if other is a RDFTerm and is equal to this

See Also:

• IRI.equals(Object)
• BlankNode.equals(Object)
• Literal.equals(Object)