Package org.eclipse.rdf4j.sail.memory.model

Class MemValueFactory

java.lang.Object

org.eclipse.rdf4j.model.base.AbstractValueFactory

org.eclipse.rdf4j.sail.memory.model.MemValueFactory

All Implemented Interfaces:

org.eclipse.rdf4j.model.ValueFactory

public class MemValueFactory
extends org.eclipse.rdf4j.model.base.AbstractValueFactory

A factory for MemValue objects that keeps track of created objects to prevent the creation of duplicate objects, minimizing memory usage as a result.

Author:

Arjohn Kampman, David Huynh

Constructor Summary

Constructors

Constructor	Description
MemValueFactory()	A cache of the most common IRIs to improve lookup performance when users use our vocabularies (eg.

Method Summary

Modifier and Type	Method	Description
void	clear()
org.eclipse.rdf4j.model.BNode	createBNode(String nodeID)
org.eclipse.rdf4j.model.IRI	createIRI(String uri)
org.eclipse.rdf4j.model.IRI	createIRI(String namespace, String localName)
org.eclipse.rdf4j.model.Literal	createLiteral(boolean value)
org.eclipse.rdf4j.model.Literal	createLiteral(String value)
org.eclipse.rdf4j.model.Literal	createLiteral(String value, String language)
org.eclipse.rdf4j.model.Literal	createLiteral(String value, org.eclipse.rdf4j.model.base.CoreDatatype datatype)
org.eclipse.rdf4j.model.Literal	createLiteral(String value, org.eclipse.rdf4j.model.IRI datatype)
org.eclipse.rdf4j.model.Literal	createLiteral(XMLGregorianCalendar calendar)
org.eclipse.rdf4j.model.Triple	createTriple(org.eclipse.rdf4j.model.Resource subject, org.eclipse.rdf4j.model.IRI predicate, org.eclipse.rdf4j.model.Value object)
MemBNode	getMemBNode(org.eclipse.rdf4j.model.BNode bnode)	See getMemValue() for description.
WeakObjectRegistry.AutoCloseableIterator<MemBNode>	getMemBNodesIterator()	Gets all bnodes that are managed by this value factory.
WeakObjectRegistry.AutoCloseableIterator<MemIRI>	getMemIRIsIterator()	Gets all URIs that are managed by this value factory.
MemLiteral	getMemLiteral(org.eclipse.rdf4j.model.Literal literal)	See getMemValue() for description.
WeakObjectRegistry.AutoCloseableIterator<MemLiteral>	getMemLiteralsIterator()	Gets all literals that are managed by this value factory.
MemResource	getMemResource(org.eclipse.rdf4j.model.Resource resource)	See getMemValue() for description.
MemIRI	getMemURI(org.eclipse.rdf4j.model.IRI uri)	See getMemValue() for description.
MemValue	getMemValue(org.eclipse.rdf4j.model.Value value)	Returns a previously created MemValue that is equal to the supplied value, or null if the supplied value is a new value or is equal to null.
MemBNode	getOrCreateMemBNode(org.eclipse.rdf4j.model.BNode bnode)	See getOrCreateMemValue(Value) for description.
MemLiteral	getOrCreateMemLiteral(org.eclipse.rdf4j.model.Literal literal)	See getOrCreateMemValue(Value) for description.
MemResource	getOrCreateMemResource(org.eclipse.rdf4j.model.Resource resource)	See getOrCreateMemValue(Value) for description.
MemTriple	getOrCreateMemTriple(org.eclipse.rdf4j.model.Triple triple)	See getOrCreateMemValue(Value) for description.
MemIRI	getOrCreateMemURI(org.eclipse.rdf4j.model.IRI uri)	See getOrCreateMemValue(Value) for description.
MemValue	getOrCreateMemValue(org.eclipse.rdf4j.model.Value value)	Gets or creates a MemValue for the supplied Value.

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

createBNode, createLiteral, createLiteral, createLiteral, createLiteral, createLiteral, createLiteral, createLiteral, createLiteral, createLiteral, createLiteral, createLiteral, createLiteral, createStatement, createStatement

Methods inherited from class java.lang.Object

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

Constructor Detail

MemValueFactory

public MemValueFactory()

A cache of the most common IRIs to improve lookup performance when users use our vocabularies (eg. RDF.TYPE).

Method Detail

clear

public void clear()

getMemValue

public MemValue getMemValue(org.eclipse.rdf4j.model.Value value)

Returns a previously created MemValue that is equal to the supplied value, or null if the supplied value is a new value or is equal to null.

Parameters:

value - The MemValue equivalent of the supplied value, or null.

Returns:

A previously created MemValue that is equal to value, or null if no such value exists or if value is equal to null.

getMemResource

public MemResource getMemResource(org.eclipse.rdf4j.model.Resource resource)

See getMemValue() for description.

getMemURI

public MemIRI getMemURI(org.eclipse.rdf4j.model.IRI uri)

See getMemValue() for description.

getMemBNode

public MemBNode getMemBNode(org.eclipse.rdf4j.model.BNode bnode)

See getMemValue() for description.

getMemLiteral

public MemLiteral getMemLiteral(org.eclipse.rdf4j.model.Literal literal)

See getMemValue() for description.

getMemIRIsIterator

public WeakObjectRegistry.AutoCloseableIterator<MemIRI> getMemIRIsIterator()

Gets all URIs that are managed by this value factory.

Returns:

An autocloseable iterator.

getMemBNodesIterator

public WeakObjectRegistry.AutoCloseableIterator<MemBNode> getMemBNodesIterator()

Gets all bnodes that are managed by this value factory.

Returns:

An autocloseable iterator.

getMemLiteralsIterator

public WeakObjectRegistry.AutoCloseableIterator<MemLiteral> getMemLiteralsIterator()

Gets all literals that are managed by this value factory.

Returns:

An autocloseable iterator.

getOrCreateMemValue

public MemValue getOrCreateMemValue(org.eclipse.rdf4j.model.Value value)

Gets or creates a MemValue for the supplied Value. If the factory already contains a MemValue object that is equivalent to the supplied value then this equivalent value will be returned. Otherwise a new MemValue will be created, stored for future calls and then returned.

Parameters:

value - A Resource or Literal.

Returns:

The existing or created MemValue.

getOrCreateMemResource

public MemResource getOrCreateMemResource(org.eclipse.rdf4j.model.Resource resource)

See getOrCreateMemValue(Value) for description.

getOrCreateMemURI

public MemIRI getOrCreateMemURI(org.eclipse.rdf4j.model.IRI uri)

See getOrCreateMemValue(Value) for description.

getOrCreateMemBNode

public MemBNode getOrCreateMemBNode(org.eclipse.rdf4j.model.BNode bnode)

See getOrCreateMemValue(Value) for description.

getOrCreateMemLiteral

public MemLiteral getOrCreateMemLiteral(org.eclipse.rdf4j.model.Literal literal)

See getOrCreateMemValue(Value) for description.

getOrCreateMemTriple

public MemTriple getOrCreateMemTriple(org.eclipse.rdf4j.model.Triple triple)

See getOrCreateMemValue(Value) for description.

createIRI

public org.eclipse.rdf4j.model.IRI createIRI(String uri)

Specified by:

createIRI in interface org.eclipse.rdf4j.model.ValueFactory

Overrides:

createIRI in class org.eclipse.rdf4j.model.base.AbstractValueFactory

createIRI

public org.eclipse.rdf4j.model.IRI createIRI(String namespace,
                                             String localName)

Specified by:

createIRI in interface org.eclipse.rdf4j.model.ValueFactory

Overrides:

createIRI in class org.eclipse.rdf4j.model.base.AbstractValueFactory

createBNode

public org.eclipse.rdf4j.model.BNode createBNode(String nodeID)

Specified by:

createBNode in interface org.eclipse.rdf4j.model.ValueFactory

Overrides:

createBNode in class org.eclipse.rdf4j.model.base.AbstractValueFactory

createLiteral

public org.eclipse.rdf4j.model.Literal createLiteral(String value)

Specified by:

createLiteral in interface org.eclipse.rdf4j.model.ValueFactory

Overrides:

createLiteral in class org.eclipse.rdf4j.model.base.AbstractValueFactory

createLiteral

public org.eclipse.rdf4j.model.Literal createLiteral(String value,
                                                     String language)

Specified by:

createLiteral in interface org.eclipse.rdf4j.model.ValueFactory

Overrides:

createLiteral in class org.eclipse.rdf4j.model.base.AbstractValueFactory

createLiteral

public org.eclipse.rdf4j.model.Literal createLiteral(String value,
                                                     org.eclipse.rdf4j.model.IRI datatype)

Specified by:

createLiteral in interface org.eclipse.rdf4j.model.ValueFactory

Overrides:

createLiteral in class org.eclipse.rdf4j.model.base.AbstractValueFactory

createLiteral

public org.eclipse.rdf4j.model.Literal createLiteral(String value,
                                                     org.eclipse.rdf4j.model.base.CoreDatatype datatype)

Specified by:

createLiteral in interface org.eclipse.rdf4j.model.ValueFactory

Overrides:

createLiteral in class org.eclipse.rdf4j.model.base.AbstractValueFactory

createLiteral

public org.eclipse.rdf4j.model.Literal createLiteral(boolean value)

Specified by:

createLiteral in interface org.eclipse.rdf4j.model.ValueFactory

Overrides:

createLiteral in class org.eclipse.rdf4j.model.base.AbstractValueFactory

createLiteral

public org.eclipse.rdf4j.model.Literal createLiteral(XMLGregorianCalendar calendar)

Specified by:

createLiteral in interface org.eclipse.rdf4j.model.ValueFactory

Overrides:

createLiteral in class org.eclipse.rdf4j.model.base.AbstractValueFactory

createTriple

public org.eclipse.rdf4j.model.Triple createTriple(org.eclipse.rdf4j.model.Resource subject,
                                                   org.eclipse.rdf4j.model.IRI predicate,
                                                   org.eclipse.rdf4j.model.Value object)

Specified by:

createTriple in interface org.eclipse.rdf4j.model.ValueFactory

Overrides:

createTriple in class org.eclipse.rdf4j.model.base.AbstractValueFactory