org.jrdf
Class PersistentJRDFFactoryImpl

java.lang.Object
  org.jrdf.PersistentJRDFFactoryImpl

All Implemented Interfaces:

JRDFFactory, PersistentJRDFFactory

public final class PersistentJRDFFactoryImpl
extends Object
implements PersistentJRDFFactory

Uses BDB JE and a BTree to store graphs, that can be accessed by name (using hasGraph and getGraph). Returns sorted results.

Version:

$Id: PersistentJRDFFactoryImpl.java 3321 2010-09-27 19:35:32Z newmana $

Author:

Andrew Newman

Method Summary

void	close()
Graph	getExistingGraph(String name)
static PersistentJRDFFactory	getFactory(DirectoryHandler handler)
Graph	getGraph() Create a new JRDF graph depending on the current configuration.
Graph	getGraph(String name)
Graph	getNewGraph(String name)
SparqlConnection	getNewSparqlConnection() Create a new connection to perform SPARQL operations depending on the current configuration.
boolean	hasGraph(String name)
void	refresh() Reload any configuration files used to create the objects.

Methods inherited from class java.lang.Object

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

Method Detail

getFactory

public static PersistentJRDFFactory getFactory(DirectoryHandler handler)

getNewSparqlConnection

public SparqlConnection getNewSparqlConnection()

Description copied from interface: JRDFFactory

Create a new connection to perform SPARQL operations depending on the current configuration.

Specified by:

getNewSparqlConnection in interface JRDFFactory

Returns:

a new instance of a SPARQL connection.

hasGraph

public boolean hasGraph(String name)

Specified by:

hasGraph in interface PersistentJRDFFactory

getGraph

public Graph getGraph()

Description copied from interface: JRDFFactory

Create a new JRDF graph depending on the current configuration.

Specified by:

getGraph in interface JRDFFactory

Returns:

a new instance of a JRDF graph.

getGraph

public Graph getGraph(String name)

Specified by:

getGraph in interface PersistentJRDFFactory

getNewGraph

public Graph getNewGraph(String name)

Specified by:

getNewGraph in interface PersistentJRDFFactory

getExistingGraph

public Graph getExistingGraph(String name)
                       throws IllegalArgumentException

Specified by:

getExistingGraph in interface PersistentJRDFFactory

Throws:

IllegalArgumentException

refresh

public void refresh()

Description copied from interface: JRDFFactory

Reload any configuration files used to create the objects.

Specified by:

refresh in interface JRDFFactory

close

public void close()