MemValueFactory (OpenRDF Sesame 2.8.3 API)

java.lang.Object
- org.openrdf.model.impl.ValueFactoryBase
- - org.openrdf.sail.memory.model.MemValueFactory

All Implemented Interfaces:

ValueFactory
```
public class MemValueFactory
extends ValueFactoryBase
```
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()`
`BNode`	`createBNode(String nodeID)` Creates a new blank node with the given node identifier.
`protected Literal`	`createFPLiteral(Number n, URI datatype)` Calls `ValueFactoryBase.createNumericLiteral(Number, URI)` with the supplied value and datatype as parameters.
`protected Literal`	`createIntegerLiteral(Number n, URI datatype)` Calls `ValueFactoryBase.createNumericLiteral(Number, URI)` with the supplied value and datatype as parameters.
`Literal`	`createLiteral(boolean value)` Calls `ValueFactory.createLiteral(String, URI)` with the String-value of the supplied value and `XMLSchema.BOOLEAN` as parameters.
`Literal`	`createLiteral(String value)` Creates a new literal with the supplied label.
`Literal`	`createLiteral(String value, String language)` Creates a new literal with the supplied label and language attribute.
`Literal`	`createLiteral(String value, URI datatype)` Creates a new literal with the supplied label and datatype.
`Literal`	`createLiteral(XMLGregorianCalendar calendar)` Calls `ValueFactory.createLiteral(String, URI)` with the String-value of the supplied calendar and the appropriate datatype as parameters.
`Statement`	`createStatement(Resource subject, URI predicate, Value object)` Creates a new statement with the supplied subject, predicate and object.
`Statement`	`createStatement(Resource subject, URI predicate, Value object, Resource context)` Creates a new statement with the supplied subject, predicate and object and associated context.
`URI`	`createURI(String uri)` Creates a new URI from the supplied string-representation.
`URI`	`createURI(String namespace, String localName)` Creates a new URI from the supplied namespace and local name.
`MemBNode`	`getMemBNode(BNode bnode)` See getMemValue() for description.
`Set<MemBNode>`	`getMemBNodes()` Gets all bnodes that are managed by this value factory.
`MemLiteral`	`getMemLiteral(Literal literal)` See getMemValue() for description.
`Set<MemLiteral>`	`getMemLiterals()` Gets all literals that are managed by this value factory.
`MemResource`	`getMemResource(Resource resource)` See getMemValue() for description.
`MemURI`	`getMemURI(URI uri)` See getMemValue() for description.
`Set<MemURI>`	`getMemURIs()` Gets all URIs that are managed by this value factory.
`MemValue`	`getMemValue(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(BNode bnode)` See `getOrCreateMemValue(Value)` for description.
`MemLiteral`	`getOrCreateMemLiteral(Literal literal)` See `getOrCreateMemValue(Value)` for description.
`MemResource`	`getOrCreateMemResource(Resource resource)` See `getOrCreateMemValue(Value)` for description.
`MemURI`	`getOrCreateMemURI(URI uri)` See `getOrCreateMemValue(Value)` for description.
`MemValue`	`getOrCreateMemValue(Value value)` Gets or creates a MemValue for the supplied Value.

Methods inherited from class org.openrdf.model.impl.ValueFactoryBase
createBNode, createLiteral, createLiteral, createLiteral, createLiteral, createLiteral, createLiteral, createLiteral, createNumericLiteral, initBNodeParams

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

- Constructor Detail
  - MemValueFactory
```
public MemValueFactory()
```
- Method Detail
  - clear
```
public void clear()
```
  - getMemValue
```
public MemValue getMemValue(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(Resource resource)
```
    See getMemValue() for description.
  - getMemURI
```
public MemURI getMemURI(URI uri)
```
    See getMemValue() for description.
  - getMemBNode
```
public MemBNode getMemBNode(BNode bnode)
```
    See getMemValue() for description.
  - getMemLiteral
```
public MemLiteral getMemLiteral(Literal literal)
```
    See getMemValue() for description.
  - getMemURIs
```
public Set<MemURI> 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(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(Resource resource)
```
    See getOrCreateMemValue(Value) for description.
  - getOrCreateMemURI
```
public MemURI getOrCreateMemURI(URI uri)
```
    See getOrCreateMemValue(Value) for description.
  - getOrCreateMemBNode
```
public MemBNode getOrCreateMemBNode(BNode bnode)
```
    See getOrCreateMemValue(Value) for description.
  - getOrCreateMemLiteral
```
public MemLiteral getOrCreateMemLiteral(Literal literal)
```
    See getOrCreateMemValue(Value) for description.
  - createURI
```
public URI createURI(String uri)
```
    Description copied from interface: ValueFactory
    
    Creates a new URI from the supplied string-representation.
    
    Parameters:
    
    uri - A string-representation of a URI.
    
    Returns:
    
    An object representing the URI.
  - createURI
```
public URI createURI(String namespace,
                     String localName)
```
    Description copied from interface: ValueFactory
    
    Creates a new URI from the supplied namespace and local name. Calling this method is funtionally equivalent to calling createURI(namespace+localName), but allows the ValueFactory to reuse supplied namespace and local name strings whenever possible. Note that the values returned by URI.getNamespace() and URI.getLocalName() are not necessarily the same as the values that are supplied to this method.
    
    Parameters:
    
    namespace - The URI's namespace.
    
    localName - The URI's local name.
  - createBNode
```
public BNode createBNode(String nodeID)
```
    Description copied from interface: ValueFactory
    
    Creates a new blank node with the given node identifier.
    
    Parameters:
    
    nodeID - The blank node identifier.
    
    Returns:
    
    An object representing the blank node.
  - createLiteral
```
public Literal createLiteral(String value)
```
    Description copied from interface: ValueFactory
    
    Creates a new literal with the supplied label.
    
    Parameters:
    
    value - The literal's label.
  - createLiteral
```
public Literal createLiteral(String value,
                             String language)
```
    Description copied from interface: ValueFactory
    
    Creates a new literal with the supplied label and language attribute.
    
    Parameters:
    
    value - The literal's label.
    
    language - The literal's language attribute, or null if the literal doesn't have a language.
  - createLiteral
```
public Literal createLiteral(String value,
                             URI datatype)
```
    Description copied from interface: ValueFactory
    
    Creates a new literal with the supplied label and datatype.
    
    Parameters:
    
    value - The literal's label.
    
    datatype - The literal's datatype, or null if the literal doesn't have a datatype.
  - createLiteral
```
public Literal createLiteral(boolean value)
```
    Description copied from class: ValueFactoryBase
    
    Calls ValueFactory.createLiteral(String, URI) with the String-value of the supplied value and XMLSchema.BOOLEAN as parameters.
    
    Specified by:
    
    createLiteral in interface ValueFactory
    
    Overrides:
    
    createLiteral in class ValueFactoryBase
    
    Parameters:
    
    value - The value for the literal.
    
    Returns:
    
    An xsd:boolean-typed literal for the specified value.
  - createIntegerLiteral
```
protected Literal createIntegerLiteral(Number n,
                                       URI datatype)
```
    Description copied from class: ValueFactoryBase
    
    Calls ValueFactoryBase.createNumericLiteral(Number, URI) with the supplied value and datatype as parameters.
    
    Overrides:
    
    createIntegerLiteral in class ValueFactoryBase
  - createFPLiteral
```
protected Literal createFPLiteral(Number n,
                                  URI datatype)
```
    Description copied from class: ValueFactoryBase
    
    Calls ValueFactoryBase.createNumericLiteral(Number, URI) with the supplied value and datatype as parameters.
    
    Overrides:
    
    createFPLiteral in class ValueFactoryBase
  - createLiteral
```
public Literal createLiteral(XMLGregorianCalendar calendar)
```
    Description copied from class: ValueFactoryBase
    
    Calls ValueFactory.createLiteral(String, URI) with the String-value of the supplied calendar and the appropriate datatype as parameters.
    
    Specified by:
    
    createLiteral in interface ValueFactory
    
    Overrides:
    
    createLiteral in class ValueFactoryBase
    
    Parameters:
    
    calendar - The value for the literal.
    
    Returns:
    
    An typed literal for the specified calendar.
    
    See Also:
    
    XMLGregorianCalendar.toXMLFormat(), XMLGregorianCalendar.getXMLSchemaType(), XMLDatatypeUtil.qnameToURI(javax.xml.namespace.QName)
  - createStatement
```
public Statement createStatement(Resource subject,
                                 URI predicate,
                                 Value object)
```
    Description copied from interface: ValueFactory
    
    Creates a new statement with the supplied subject, predicate and object.
    
    Parameters:
    
    subject - The statement's subject.
    
    predicate - The statement's predicate.
    
    object - The statement's object.
    
    Returns:
    
    The created statement.
  - createStatement
```
public Statement createStatement(Resource subject,
                                 URI predicate,
                                 Value object,
                                 Resource context)
```
    Description copied from interface: ValueFactory
    
    Creates a new statement with the supplied subject, predicate and object and associated context.
    
    Parameters:
    
    subject - The statement's subject.
    
    predicate - The statement's predicate.
    
    object - The statement's object.
    
    context - The statement's context.
    
    Returns:
    
    The created statement.

Class MemValueFactory

Constructor Summary

Method Summary

Methods inherited from class org.openrdf.model.impl.ValueFactoryBase

Methods inherited from class java.lang.Object

Constructor Detail

MemValueFactory

Method Detail

clear

getMemValue

getMemResource

getMemURI

getMemBNode

getMemLiteral

getMemURIs

getMemBNodes

getMemLiterals

getOrCreateMemValue

getOrCreateMemResource

getOrCreateMemURI

getOrCreateMemBNode

getOrCreateMemLiteral

createURI

createURI

createBNode

createLiteral

createLiteral

createLiteral

createLiteral

createIntegerLiteral

createFPLiteral

createLiteral

createStatement

createStatement