org.apache.clerezza.rdf.virtuoso.storage

Class VirtuosoMGraph

java.lang.Object

java.util.AbstractCollection<Triple>

org.apache.clerezza.rdf.core.impl.AbstractTripleCollection

org.apache.clerezza.rdf.core.impl.AbstractMGraph

org.apache.clerezza.rdf.virtuoso.storage.VirtuosoMGraph

All Implemented Interfaces:

Iterable<Triple>, Collection<Triple>, LockableMGraph, MGraph, TripleCollection

Direct Known Subclasses:

VirtuosoGraph

public class VirtuosoMGraph
extends AbstractMGraph
implements MGraph, LockableMGraph

Implementation of MGraph for the Virtuoso quad store.

Author:

enridaga

Field Summary

Fields

Modifier and Type	Field and Description
protected org.slf4j.Logger	logger Logger

Constructor Summary

Constructors

Constructor and Description
VirtuosoMGraph(String name, DataAccess dataAccess) Creates a VirtuosoMGraph Virtuoso MGraph binds directly to the store.

Method Summary

Methods

Modifier and Type	Method and Description
VirtuosoGraph	asVirtuosoGraph()
void	clear()
boolean	equals(Object o) Must be a VirtuosoMGraph with the same name.
protected DataAccess	getDataAccess()
Graph	getGraph() Returns the graph
java.util.concurrent.locks.ReadWriteLock	getLock() The lock provided by this methods allows to create read- and write-locks that span individual method calls.
String	getName() Returns the graph name
protected boolean	performAdd(Triple triple) A subclass of AbstractTripleCollection should override this method instead of add for graph event support to be added.
protected Iterator<Triple>	performFilter(NonLiteral subject, UriRef predicate, Resource object) A subclass of AbstractTripleCollection should override this method instead of filter for graph event support to be added.
protected boolean	performRemove(Triple triple) A subclass of AbstractTripleCollection should override this method instead of remove for graph event support to be added.
int	size() We load the size every time it is requested.

Methods inherited from class org.apache.clerezza.rdf.core.impl.AbstractTripleCollection

add, addGraphListener, addGraphListener, contains, dispatchEvent, filter, iterator, remove, removeAll, removeGraphListener

Methods inherited from class java.util.AbstractCollection

addAll, containsAll, isEmpty, retainAll, toArray, toArray, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.clerezza.rdf.core.TripleCollection

addGraphListener, addGraphListener, filter, removeGraphListener

Methods inherited from interface java.util.Collection

add, addAll, contains, containsAll, hashCode, isEmpty, iterator, remove, removeAll, retainAll, toArray, toArray

Field Detail

logger

protected org.slf4j.Logger logger

Logger

Constructor Detail

VirtuosoMGraph

public VirtuosoMGraph(String name,
              DataAccess dataAccess)

Creates a VirtuosoMGraph Virtuoso MGraph binds directly to the store.

Parameters:

connection -

Method Detail

getLock

public java.util.concurrent.locks.ReadWriteLock getLock()

Description copied from interface: LockableMGraph

The lock provided by this methods allows to create read- and write-locks that span individual method calls. Having a read locks prevents other threads from writing to this MGraph, having a write-lock prevents other threads from reading and writing.

Specified by:

getLock in interface LockableMGraph

Returns:

the lock of this MGraph

getGraph

public Graph getGraph()

Description copied from interface: MGraph

Returns the graph

Specified by:

getGraph in interface MGraph

Overrides:

getGraph in class AbstractMGraph

Returns:

graph

asVirtuosoGraph

public VirtuosoGraph asVirtuosoGraph()

getDataAccess

protected DataAccess getDataAccess()

performFilter

protected Iterator<Triple> performFilter(NonLiteral subject,
                             UriRef predicate,
                             Resource object)

Description copied from class: AbstractTripleCollection

A subclass of AbstractTripleCollection should override this method instead of filter for graph event support to be added. The Iterator returned by filter will dispatch a GraphEvent after invoking the remove method of the iterator returned by this method.

Specified by:

performFilter in class AbstractTripleCollection

Returns:

size

public int size()

We load the size every time it is requested.

Specified by:

size in interface Collection<Triple>

Specified by:

size in class AbstractCollection<Triple>

clear

public void clear()

Specified by:

clear in interface Collection<Triple>

Overrides:

clear in class AbstractCollection<Triple>

performAdd

protected boolean performAdd(Triple triple)

Description copied from class: AbstractTripleCollection

A subclass of AbstractTripleCollection should override this method instead of add for graph event support to be added.

Overrides:

performAdd in class AbstractTripleCollection

Parameters:

triple - The triple to be added to the triple collection

Returns:

performRemove

protected boolean performRemove(Triple triple)

Description copied from class: AbstractTripleCollection

A subclass of AbstractTripleCollection should override this method instead of remove for graph event support to be added.

Overrides:

performRemove in class AbstractTripleCollection

Returns:

getName

public String getName()

Returns the graph name

Returns:

equals

public boolean equals(Object o)

Must be a VirtuosoMGraph with the same name. Subclasses are not assumed to be equals (VirtuosoGraph is not the same as VirtuosoMGraph)

Specified by:

equals in interface Collection<Triple>

Specified by:

equals in interface MGraph

Overrides:

equals in class Object

Returns:

true if other == this