Package com.apicatalog.rdf.primitive

Class LangString

java.lang.Object

com.apicatalog.rdf.primitive.Literal

com.apicatalog.rdf.primitive.LangString

All Implemented Interfaces:

RdfLiteral, RdfTerm

public class LangString
extends Literal
implements RdfLiteral

Represents an RDF language-tagged string.

A LangString is an RDF literal that consists of a lexical value (the value of the literal), a datatype, an optional language tag, and an optional direction (left-to-right or right-to-left). It implements the RdfLiteral interface and provides methods for retrieving the lexical value, datatype, language tag, and direction of the language-tagged string.

Nested Class Summary

Nested classes/interfaces inherited from interface com.apicatalog.rdf.model.RdfLiteral

RdfLiteral.Direction

Field Summary

Fields

Modifier and Type	Field	Description
(package private) RdfLiteral.Direction	direction
(package private) java.lang.String	langTag

Fields inherited from class com.apicatalog.rdf.primitive.Literal

datatype, lexicalValue

Constructor Summary

Constructors

Constructor	Description
LangString(java.lang.String lexicalValue, java.lang.String datatype, java.lang.String langTag, RdfLiteral.Direction direction)

Method Summary

Modifier and Type	Method	Description
java.util.Optional<RdfLiteral.Direction>	direction()	Returns the direction of the literal, which can be either left-to-right (LTR) or right-to-left (RTL).
boolean	equals(java.lang.Object obj)	Compares this RDF term to the specified object.
int	hashCode()	Returns a hash code value for this RDF term.
java.util.Optional<java.lang.String>	language()	Returns an optional language tag associated with the literal.
static LangString	of(java.lang.String lexicalValue, java.lang.String datatype, java.lang.String langTag)	Factory method to create a LangString with the specified lexical value, datatype, and language tag.
static LangString	of(java.lang.String lexicalValue, java.lang.String datatype, java.lang.String langTag, RdfLiteral.Direction direction)	Factory method to create a LangString with the specified lexical value, datatype, language tag, and direction.
static LangString	of(java.lang.String lexicalValue, java.lang.String datatype, java.lang.String langTag, java.lang.String direction)	Factory method to create a LangString with the specified lexical value, datatype, language tag, and direction.
java.lang.String	toString()	Returns a string representation of this RDF term.

Methods inherited from class com.apicatalog.rdf.primitive.Literal

datatype, lexicalValue, of

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.apicatalog.rdf.model.RdfLiteral

asLiteral, datatype, isLiteral, lexicalValue

Methods inherited from interface com.apicatalog.rdf.model.RdfTerm

asResource, asTriple, isResource, isTriple

Field Detail

langTag

final java.lang.String langTag

direction

final RdfLiteral.Direction direction

Constructor Detail

LangString

LangString(java.lang.String lexicalValue,
           java.lang.String datatype,
           java.lang.String langTag,
           RdfLiteral.Direction direction)

Method Detail

of

public static LangString of(java.lang.String lexicalValue,
                            java.lang.String datatype,
                            java.lang.String langTag)

Factory method to create a LangString with the specified lexical value, datatype, and language tag.

Parameters:

lexicalValue - the lexical value of the language-tagged string

datatype - the datatype of the literal (e.g., rdf:langString)

langTag - the language tag (e.g., "en", "fr")

Returns:

a new LangString instance

of

public static LangString of(java.lang.String lexicalValue,
                            java.lang.String datatype,
                            java.lang.String langTag,
                            java.lang.String direction)

Factory method to create a LangString with the specified lexical value, datatype, language tag, and direction.

Parameters:

lexicalValue - the lexical value of the language-tagged string

datatype - the datatype of the literal (e.g., rdf:langString)

langTag - the language tag (e.g., "en", "fr")

direction - the text direction (LTR or RTL)

Returns:

a new LangString instance

of

public static LangString of(java.lang.String lexicalValue,
                            java.lang.String datatype,
                            java.lang.String langTag,
                            RdfLiteral.Direction direction)

Factory method to create a LangString with the specified lexical value, datatype, language tag, and direction.

Parameters:

lexicalValue - the lexical value of the language-tagged string

datatype - the datatype of the literal (e.g., rdf:langString)

langTag - the language tag (e.g., "en", "fr")

direction - the text direction (LTR or RTL)

Returns:

a new LangString instance

language

public java.util.Optional<java.lang.String> language()

Description copied from interface: RdfLiteral

Returns an optional language tag associated with the literal.

If the literal is a language-tagged string (e.g. rdf:langString), this method returns the language tag; otherwise, it returns Optional.empty().

Specified by:

language in interface RdfLiteral

Overrides:

language in class Literal

Returns:

an Optional containing the language tag if present, or Optional.empty() if not set

direction

public java.util.Optional<RdfLiteral.Direction> direction()

Description copied from interface: RdfLiteral

Returns the direction of the literal, which can be either left-to-right (LTR) or right-to-left (RTL).

Specified by:

direction in interface RdfLiteral

Overrides:

direction in class Literal

Returns:

an Optional containing the direction if present, or Optional.empty() if not set

hashCode

public int hashCode()

Description copied from interface: RdfTerm

Returns a hash code value for this RDF term.

Specified by:

hashCode in interface RdfTerm

Overrides:

hashCode in class Literal

Returns:

a hash code consistent with RdfTerm.equals(Object).

equals

public boolean equals(java.lang.Object obj)

Description copied from interface: RdfTerm

Compares this RDF term to the specified object. Implementations must override this method to provide equality checks appropriate to the term type.

Specified by:

equals in interface RdfTerm

Overrides:

equals in class Literal

Parameters:

obj - the object to compare with this term.

Returns:

true if the specified object is equal to this term; false otherwise.

toString

public java.lang.String toString()

Description copied from interface: RdfTerm

Returns a string representation of this RDF term.

Specified by:

toString in interface RdfTerm

Overrides:

toString in class Literal

Returns:

a string describing this RDF term.