Class MemLiteral

java.lang.Object

org.eclipse.rdf4j.model.base.AbstractLiteral

org.eclipse.rdf4j.model.impl.SimpleLiteral

org.eclipse.rdf4j.sail.memory.model.MemLiteral

All Implemented Interfaces:

Serializable, Literal, Value, MemValue

Direct Known Subclasses:

BooleanMemLiteral, CalendarMemLiteral, DecimalMemLiteral, IntegerMemLiteral, NumericMemLiteral

public class MemLiteral
extends SimpleLiteral
implements MemValue

A MemoryStore-specific extension of Literal giving it node properties.

Author:

Arjohn Kampman

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface Value

Value.Type

Modifier and Type	Interface	Description
static enum	Value.Type

Field Summary

Fields inherited from interface MemValue

EMPTY_LIST

Modifier and Type	Field	Description
static final MemStatementList	EMPTY_LIST	A shared empty MemStatementList that is returned by MemURI and MemBNode to represent an empty list.

Constructor Summary

Constructors

Constructor	Description
MemLiteral(Object creator, String label)	Creates a new Literal which will get the supplied label.
MemLiteral(Object creator, String label, String lang)	Creates a new Literal which will get the supplied label and language code.
MemLiteral(Object creator, String label, CoreDatatype datatype)
MemLiteral(Object creator, String label, IRI datatype)	Creates a new Literal which will get the supplied label and datatype.
MemLiteral(Object creator, String label, IRI datatype, CoreDatatype coreDatatype)

Method Summary

Modifier and Type	Method	Description
void	addObjectStatement(MemStatement st)	Adds a statement to this MemValue's list of statements for which it is the object.
void	cleanSnapshotsFromObjectStatements(int currentSnapshot)	Removes statements from old snapshots (those that have expired at or before the specified snapshot version) from this MemValue's list of statements for which it is the object.
Object	getCreator()	Returns the object that created this MemValue.
int	getObjectStatementCount()	Gets the number of statements for which this MemValue is the object.
MemStatementList	getObjectStatementList()	Gets the list of statements for which this MemValue is the object.
boolean	hasContextStatements()
boolean	hasObjectStatements()
boolean	hasPredicateStatements()
boolean	hasStatements()	Checks whether this MemValue has any statements.
boolean	hasSubjectStatements()

Methods inherited from class SimpleLiteral

booleanValue, byteValue, calendarValue, decimalValue, doubleValue, equals, floatValue, getCoreDatatype, getDatatype, getLabel, getLanguage, hashCode, integerValue, intValue, longValue, setDatatype, setDatatype, setDatatype, setLabel, setLanguage, shortValue, stringValue, toString

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 AbstractLiteral

temporalAccessorValue, temporalAmountValue

Modifier and Type	Method	Description
TemporalAccessor	temporalAccessorValue()	Retrieves the temporal accessor value of this literal.
TemporalAmount	temporalAmountValue()	Retrieves the temporal amount value of this literal.

Methods inherited from class Object

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

Methods inherited from interface Literal

getType, isLiteral

Modifier and Type	Method	Description
default Value.Type	getType()
default boolean	isLiteral()	Check if the object is an instance of the given type.

Methods inherited from interface Value

isBNode, isIRI, isResource, isTriple

Modifier and Type	Method	Description
default boolean	isBNode()	Check if the object is an instance of the given type.
default boolean	isIRI()	Check if the object is an instance of the given type.
default boolean	isResource()	Check if the object is an instance of the given type.
default boolean	isTriple()	Check if the object is an instance of the given type.

Constructor Details

MemLiteral

public MemLiteral(Object creator,
 String label)

Creates a new Literal which will get the supplied label.

Parameters:

creator - The object that is creating this MemLiteral.

label - The label for this literal.

MemLiteral

public MemLiteral(Object creator,
 String label,
 String lang)

Creates a new Literal which will get the supplied label and language code.

Parameters:

creator - The object that is creating this MemLiteral.

label - The label for this literal.

lang - The language code of the supplied label.

MemLiteral

public MemLiteral(Object creator,
 String label,
 IRI datatype)

Creates a new Literal which will get the supplied label and datatype.

Parameters:

creator - The object that is creating this MemLiteral.

label - The label for this literal.

datatype - The datatype of the supplied label.

MemLiteral

public MemLiteral(Object creator,
 String label,
 IRI datatype,
 CoreDatatype coreDatatype)

MemLiteral

public MemLiteral(Object creator,
 String label,
 CoreDatatype datatype)

Method Details

getCreator

public Object getCreator()

Description copied from interface: MemValue

Returns the object that created this MemValue. MemValues are only unique within a single repository, but an application could use several repositories at the same time, passing MemValues generated by one Sail to another Sail. In such situations, the MemValue of the first Sail cannot be used by the second Sail.

Specified by:

getCreator in interface MemValue

hasStatements

public boolean hasStatements()

Description copied from interface: MemValue

Checks whether this MemValue has any statements. A MemValue object has statements if there is at least one statement where it is used as the subject, predicate, object or context value.

Specified by:

hasStatements in interface MemValue

Returns:

true if the MemValue has statements, false otherwise.

getObjectStatementList

public MemStatementList getObjectStatementList()

Description copied from interface: MemValue

Gets the list of statements for which this MemValue is the object.

Specified by:

getObjectStatementList in interface MemValue

Returns:

A MemStatementList containing the statements.

getObjectStatementCount

public int getObjectStatementCount()

Description copied from interface: MemValue

Gets the number of statements for which this MemValue is the object.

Specified by:

getObjectStatementCount in interface MemValue

Returns:

An integer larger than or equal to 0.

addObjectStatement

public void addObjectStatement(MemStatement st)
                        throws InterruptedException

Description copied from interface: MemValue

Adds a statement to this MemValue's list of statements for which it is the object.

Specified by:

addObjectStatement in interface MemValue

Throws:

InterruptedException

cleanSnapshotsFromObjectStatements

public void cleanSnapshotsFromObjectStatements(int currentSnapshot)
                                        throws InterruptedException

Description copied from interface: MemValue

Removes statements from old snapshots (those that have expired at or before the specified snapshot version) from this MemValue's list of statements for which it is the object.

Specified by:

cleanSnapshotsFromObjectStatements in interface MemValue

Parameters:

currentSnapshot - The current snapshot version.

Throws:

InterruptedException

hasSubjectStatements

public boolean hasSubjectStatements()

Specified by:

hasSubjectStatements in interface MemValue

hasPredicateStatements

public boolean hasPredicateStatements()

Specified by:

hasPredicateStatements in interface MemValue

hasObjectStatements

public boolean hasObjectStatements()

Specified by:

hasObjectStatements in interface MemValue

hasContextStatements

public boolean hasContextStatements()

Specified by:

hasContextStatements in interface MemValue