Package org.eclipse.rdf4j.model.impl

Class SimpleLiteral

java.lang.Object

org.eclipse.rdf4j.model.base.AbstractLiteral

org.eclipse.rdf4j.model.impl.SimpleLiteral

All Implemented Interfaces:

Serializable, Literal, Value

Direct Known Subclasses:

BooleanLiteral, CalendarLiteral, DecimalLiteral, IntegerLiteral, MemLiteral, NativeLiteral

public class SimpleLiteral
extends AbstractLiteral

A simple default implementation of the Literal interface.

Author:

Arjohn Kampman, David Huynh

See Also:

• Serialized Form

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	SimpleLiteral()
protected	SimpleLiteral(String label)	Creates a new plain literal with the supplied label.
protected	SimpleLiteral(String label, String language)	Creates a new plain literal with the supplied label and language tag.
protected	SimpleLiteral(String label, CoreDatatype datatype)
protected	SimpleLiteral(String label, IRI datatype)	Creates a new datatyped literal with the supplied label and datatype.
protected	SimpleLiteral(String label, IRI datatype, CoreDatatype coreDatatype)	Creates a new datatyped literal with the supplied label and datatype.

Method Summary

Modifier and Type	Method	Description
boolean	booleanValue()	Returns the boolean value of this literal.
byte	byteValue()	Returns the byte value of this literal.
XMLGregorianCalendar	calendarValue()	Returns the XMLGregorianCalendar value of this literal.
BigDecimal	decimalValue()	Returns the decimal value of this literal.
double	doubleValue()	Returns the double value of this literal.
boolean	equals(Object o)	Compares this literal to another object.
float	floatValue()	Returns the float value of this literal.
CoreDatatype	getCoreDatatype()	CoreDatatype is an interface for natively supported datatypes in RDF4J.
IRI	getDatatype()	Gets the datatype for this literal.
String	getLabel()	Gets the label (the lexical value) of this literal.
Optional<String>	getLanguage()	Gets the language tag for this literal, normalized to lower case.
int	hashCode()	Computes the hash code of this literal.
BigInteger	integerValue()	Returns the integer value of this literal.
int	intValue()	Returns the int value of this literal.
long	longValue()	Returns the long value of this literal.
protected void	setDatatype(CoreDatatype datatype)
protected void	setDatatype(IRI datatype)
protected void	setDatatype(IRI datatype, CoreDatatype coreDatatype)
protected void	setLabel(String label)
protected void	setLanguage(String language)
short	shortValue()	Returns the short value of this literal.
String	stringValue()	Returns the String-value of a Value object.
String	toString()	Returns the label of the literal with its language or datatype.

Methods inherited from class org.eclipse.rdf4j.model.base.AbstractLiteral

temporalAccessorValue, temporalAmountValue

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.eclipse.rdf4j.model.Literal

isLiteral

Methods inherited from interface org.eclipse.rdf4j.model.Value

isBNode, isIRI, isResource, isTriple

Constructor Details

SimpleLiteral

protected SimpleLiteral()

SimpleLiteral

protected SimpleLiteral(String label)

Creates a new plain literal with the supplied label.

Parameters:

label - The label for the literal, must not be null.

SimpleLiteral

protected SimpleLiteral(String label,
 String language)

Creates a new plain literal with the supplied label and language tag.

Parameters:

label - The label for the literal, must not be null.

language - The language tag for the literal, must not be null and not be empty.

SimpleLiteral

protected SimpleLiteral(String label,
 IRI datatype)

Creates a new datatyped literal with the supplied label and datatype.

Parameters:

label - The label for the literal, must not be null.

datatype - The datatype for the literal.

SimpleLiteral

protected SimpleLiteral(String label,
 IRI datatype,
 CoreDatatype coreDatatype)

Creates a new datatyped literal with the supplied label and datatype.

Parameters:

label - The label for the literal, must not be null.

datatype - The datatype for the literal.

SimpleLiteral

protected SimpleLiteral(String label,
 CoreDatatype datatype)

Method Details

setLabel

protected void setLabel(String label)

getLabel

public String getLabel()

Description copied from interface: Literal

Gets the label (the lexical value) of this literal.

Returns:

The literal's label.

setLanguage

protected void setLanguage(String language)

getLanguage

public Optional<String> getLanguage()

Description copied from interface: Literal

Gets the language tag for this literal, normalized to lower case.

Returns:

The language tag for this literal, or Optional.empty() if it doesn't have one.

setDatatype

protected void setDatatype(IRI datatype)

setDatatype

protected void setDatatype(IRI datatype,
 CoreDatatype coreDatatype)

setDatatype

protected void setDatatype(CoreDatatype datatype)

getDatatype

public IRI getDatatype()

Description copied from interface: Literal

Gets the datatype for this literal.

If Literal.getLanguage() returns a non-empty value than this must return rdf:langString. If no datatype was assigned to this literal by the creator, then this method must return xsd:string.

Returns:

The datatype for this literal.

equals

public boolean equals(Object o)

Description copied from interface: Literal

Compares this literal to another object.

Specified by:

equals in interface Literal

Overrides:

equals in class AbstractLiteral

Parameters:

o - the object to compare this literal to

Returns:

true, if the other object is an instance of Literal and if their labels, language tags and datatypes are equal

hashCode

public int hashCode()

Description copied from interface: Literal

Computes the hash code of this literal.

Specified by:

hashCode in interface Literal

Overrides:

hashCode in class AbstractLiteral

Returns:

a hash code for this literal computed as Literal.getLabel().hashCode()

toString

public String toString()

Returns the label of the literal with its language or datatype. Note that this method does not escape the quoted label.

Overrides:

toString in class AbstractLiteral

See Also:

• invalid reference

  org.eclipse.rdf4j.rio.ntriples.NTriplesUtil#toNTriplesString(org.eclipse.rdf4j.model.Literal)

stringValue

public String stringValue()

Description copied from interface: Value

Returns the String-value of a Value object. This returns either a Literal's label, a IRI's URI or a BNode's ID.

Specified by:

stringValue in interface Value

Overrides:

stringValue in class AbstractLiteral

booleanValue

public boolean booleanValue()

Description copied from interface: Literal

Returns the boolean value of this literal.

Specified by:

booleanValue in interface Literal

Overrides:

booleanValue in class AbstractLiteral

Returns:

The boolean value of the literal.

byteValue

public byte byteValue()

Description copied from interface: Literal

Returns the byte value of this literal.

Specified by:

byteValue in interface Literal

Overrides:

byteValue in class AbstractLiteral

Returns:

The byte value of the literal.

shortValue

public short shortValue()

Description copied from interface: Literal

Returns the short value of this literal.

Specified by:

shortValue in interface Literal

Overrides:

shortValue in class AbstractLiteral

Returns:

The short value of the literal.

intValue

public int intValue()

Description copied from interface: Literal

Returns the int value of this literal.

Specified by:

intValue in interface Literal

Overrides:

intValue in class AbstractLiteral

Returns:

The int value of the literal.

longValue

public long longValue()

Description copied from interface: Literal

Returns the long value of this literal.

Specified by:

longValue in interface Literal

Overrides:

longValue in class AbstractLiteral

Returns:

The long value of the literal.

floatValue

public float floatValue()

Description copied from interface: Literal

Returns the float value of this literal.

Specified by:

floatValue in interface Literal

Overrides:

floatValue in class AbstractLiteral

Returns:

The float value of the literal.

doubleValue

public double doubleValue()

Description copied from interface: Literal

Returns the double value of this literal.

Specified by:

doubleValue in interface Literal

Overrides:

doubleValue in class AbstractLiteral

Returns:

The double value of the literal.

integerValue

public BigInteger integerValue()

Description copied from interface: Literal

Returns the integer value of this literal.

Specified by:

integerValue in interface Literal

Overrides:

integerValue in class AbstractLiteral

Returns:

The integer value of the literal.

decimalValue

public BigDecimal decimalValue()

Description copied from interface: Literal

Returns the decimal value of this literal.

Specified by:

decimalValue in interface Literal

Overrides:

decimalValue in class AbstractLiteral

Returns:

The decimal value of the literal.

calendarValue

public XMLGregorianCalendar calendarValue()

Description copied from interface: Literal

Returns the XMLGregorianCalendar value of this literal. A calendar representation can be given for literals whose label conforms to the syntax of the following XML Schema datatypes: dateTime, time, date, gYearMonth, gMonthDay, gYear, gMonth or gDay.

Specified by:

calendarValue in interface Literal

Overrides:

calendarValue in class AbstractLiteral

Returns:

The calendar value of the literal.

getCoreDatatype

public CoreDatatype getCoreDatatype()

Description copied from interface: Literal

CoreDatatype is an interface for natively supported datatypes in RDF4J. This includes, among others, the XML Schema datatypes and rdf:langString. CoreDatatypes are implemented as enums and more performant and convenient to work with than IRI-based datatypes. The constant

invalid @link

{@link CoreDatatype#NONE)

} is used to represent a datatype that is not one of the supported core datatypes.

Returns:

The CoreDatatype or

invalid @link

{@link CoreDatatype#NONE)

} if the datatype matches none of the core datatypes. This method will not return null.