MemValueFactory (RDF4J: MemoryStore 3.7.4 API)

java.lang.Object
- org.eclipse.rdf4j.model.base.AbstractValueFactory
- - org.eclipse.rdf4j.model.impl.AbstractValueFactory
  - - org.eclipse.rdf4j.sail.memory.model.MemValueFactory

All Implemented Interfaces:

org.eclipse.rdf4j.model.ValueFactory
```
public class MemValueFactory
extends 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 and Description

MemValueFactory()

Constructors
Constructor and Description
`MemValueFactory()`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`clear()`
`org.eclipse.rdf4j.model.BNode`	`createBNode(String nodeID)`
`protected org.eclipse.rdf4j.model.Literal`	`createFPLiteral(Number n, org.eclipse.rdf4j.model.IRI datatype)`
`protected org.eclipse.rdf4j.model.Literal`	`createIntegerLiteral(Number n, org.eclipse.rdf4j.model.IRI datatype)`
`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, org.eclipse.rdf4j.model.IRI datatype)`
`org.eclipse.rdf4j.model.Literal`	`createLiteral(String value, String language)`
`org.eclipse.rdf4j.model.Literal`	`createLiteral(XMLGregorianCalendar calendar)`
`MemBNode`	`getMemBNode(org.eclipse.rdf4j.model.BNode bnode)` See getMemValue() for description.
`Set<MemBNode>`	`getMemBNodes()` Gets all bnodes that are managed by this value factory.
`MemLiteral`	`getMemLiteral(org.eclipse.rdf4j.model.Literal literal)` See getMemValue() for description.
`Set<MemLiteral>`	`getMemLiterals()` 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.
`Set<MemIRI>`	`getMemURIs()` Gets all URIs that are managed by this value factory.
`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.
`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.impl.AbstractValueFactory
createBNode, createFPLiteral, createIntegerLiteral, createLiteral, createLiteral, createLiteral, createLiteral, createLiteral, createLiteral, createLiteral, createLiteral, createLiteral, createNumericLiteral, createNumericLiteral, createStatement, createStatement, createTriple, initBNodeParams

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

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.eclipse.rdf4j.model.ValueFactory
createLiteral, createStatement, createStatement, createURI, createURI

- Constructor Detail
  - MemValueFactory
```
public MemValueFactory()
```
- 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.
  - getMemURIs
```
public Set<MemIRI> getMemURIs()
```
    Gets all URIs that are managed by this value factory.
    Warning: This method is not synchronized. To iterate over the returned set in a thread-safe way, this method should only be called while synchronizing on this object.
    
    Returns:
    
    An unmodifiable Set of MemURI objects.
  - getMemBNodes
```
public Set<MemBNode> getMemBNodes()
```
    Gets all bnodes that are managed by this value factory.
    Warning: This method is not synchronized. To iterate over the returned set in a thread-safe way, this method should only be called while synchronizing on this object.
    
    Returns:
    
    An unmodifiable Set of MemBNode objects.
  - getMemLiterals
```
public Set<MemLiteral> getMemLiterals()
```
    Gets all literals that are managed by this value factory.
    Warning: This method is not synchronized. To iterate over the returned set in a thread-safe way, this method should only be called while synchronizing on this object.
    
    Returns:
    
    An unmodifiable Set of MemURI objects.
  - 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.
  - createIRI
```
public org.eclipse.rdf4j.model.IRI createIRI(String uri)
```
    Specified by:
    
    createIRI in interface org.eclipse.rdf4j.model.ValueFactory
    
    Overrides:
    
    createIRI in class 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 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 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 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 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 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 AbstractValueFactory
  - createIntegerLiteral
```
protected org.eclipse.rdf4j.model.Literal createIntegerLiteral(Number n,
                                                               org.eclipse.rdf4j.model.IRI datatype)
```
    Overrides:
    
    createIntegerLiteral in class AbstractValueFactory
  - createFPLiteral
```
protected org.eclipse.rdf4j.model.Literal createFPLiteral(Number n,
                                                          org.eclipse.rdf4j.model.IRI datatype)
```
    Overrides:
    
    createFPLiteral in class 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 AbstractValueFactory

Class MemValueFactory

Constructor Summary

Method Summary

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

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

Methods inherited from class java.lang.Object

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

Constructor Detail

MemValueFactory

Method Detail

clear

getMemValue

getMemResource

getMemURI

getMemBNode

getMemLiteral

getMemURIs

getMemBNodes

getMemLiterals

getOrCreateMemValue

getOrCreateMemResource

getOrCreateMemURI

getOrCreateMemBNode

getOrCreateMemLiteral

createIRI

createIRI

createBNode

createLiteral

createLiteral

createLiteral

createLiteral

createIntegerLiteral

createFPLiteral

createLiteral