org.openrdf.sail.base

Class SnapshotSailStore

java.lang.Object

org.openrdf.sail.base.SnapshotSailStore

All Implemented Interfaces:

SailClosable, SailStore

public class SnapshotSailStore
extends Object
implements SailStore

A SailStore wrapper that branches the backing SailSources to provide concurrent IsolationLevels.SNAPSHOT_READ isolation and higher.

Author:

James Leigh

Constructor Summary

Constructors

Constructor and Description
SnapshotSailStore(SailStore backingStore, ModelFactory modelFactory) Wraps an SailStore, tracking changes in SailModelFactory instances.

Method Summary

Modifier and Type	Method and Description
void	close() Closes this resource, relinquishing any underlying resources.
EvaluationStatistics	getEvaluationStatistics() Used by SailSourceConnection to determine query join order.
SailSource	getExplicitSailSource()
SailSource	getInferredSailSource()
ValueFactory	getValueFactory() The ValueFactory that should be used in association with this.

Methods inherited from class java.lang.Object

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

Constructor Detail

SnapshotSailStore

public SnapshotSailStore(SailStore backingStore,
                         ModelFactory modelFactory)

Wraps an SailStore, tracking changes in SailModelFactory instances.

Parameters:

backingStore -

modelFactory -

Method Detail

close

public void close()
           throws SailException

Description copied from interface: SailClosable

Closes this resource, relinquishing any underlying resources.

Specified by:

close in interface SailClosable

Throws:

SailException - if this resource cannot be closed

getValueFactory

public ValueFactory getValueFactory()

Description copied from interface: SailStore

The ValueFactory that should be used in association with this.

Specified by:

getValueFactory in interface SailStore

Returns:

this object's ValueFactory

getEvaluationStatistics

public EvaluationStatistics getEvaluationStatistics()

Description copied from interface: SailStore

Used by SailSourceConnection to determine query join order.

Specified by:

getEvaluationStatistics in interface SailStore

Returns:

a EvaluationStatistics that is aware of the data distribution of this SailStore.

getExplicitSailSource

public SailSource getExplicitSailSource()

Specified by:

getExplicitSailSource in interface SailStore

Returns:

SailSource of only explicit statements

getInferredSailSource

public SailSource getInferredSailSource()

Specified by:

getInferredSailSource in interface SailStore

Returns:

SailSource of only inferred statements