org.apache.clerezza.rdf.jena.tdb.internals

Class ModelGraph

java.lang.Object

org.apache.clerezza.rdf.jena.tdb.internals.ModelGraph

public class ModelGraph
extends Object

Represents the Jena Model and the Clerezza Graph or MGraph. It also provide access to the JenaGraphAdaptor so that this component can add parsed data to Graphs created by calls to SingleTdbDatasetTcProvider.createGraph(UriRef, TripleCollection).

Author:

Rupert Westenthaler

Constructor Summary

Constructors

Constructor and Description
ModelGraph(java.util.concurrent.locks.ReadWriteLock lock, com.hp.hpl.jena.rdf.model.Model model, boolean readWrite) Constructs and initializes the ModelGraph

Method Summary

Methods

Modifier and Type	Method and Description
void	close() closes this ModelGraph and frees up all Jena TDB related resources.
void	delete() Removes all triples from the Jena Model and than calls close() to free remaining resources.
Graph	getGraph() Getter for the Graph
JenaGraphAdaptor	getJenaAdapter() The JenaGraphAdaptor.
MGraph	getMGraph() Getter for the MGraph
boolean	isReadWrite()
void	sync() Synchronize the Jena Model with the field system by calling TDB.sync(Model)

Methods inherited from class java.lang.Object

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

Constructor Detail

ModelGraph

public ModelGraph(java.util.concurrent.locks.ReadWriteLock lock,
          com.hp.hpl.jena.rdf.model.Model model,
          boolean readWrite)

Constructs and initializes the ModelGraph

Parameters:

model - the Jena Model

readWrite - if the Clerezza counterpart should be read- and write-able or read-only.

Method Detail

getJenaAdapter

public JenaGraphAdaptor getJenaAdapter()

The JenaGraphAdaptor. For internal use only! Do not pass this instance to other components. Use getGraph() and getMGraph() instead!

Returns:

the plain JenaGraphAdaptor

isReadWrite

public boolean isReadWrite()

getMGraph

public MGraph getMGraph()

Getter for the MGraph

Returns:

the MGraph

Throws:

IllegalStateException - if this ModelGraph is NOT readWrite

getGraph

public Graph getGraph()

Getter for the Graph

Returns:

the Graph

Throws:

IllegalStateException - if this ModelGraph is readWrite

close

public void close()

closes this ModelGraph and frees up all Jena TDB related resources.

sync

public void sync()

Synchronize the Jena Model with the field system by calling TDB.sync(Model)

delete

public void delete()

Removes all triples from the Jena Model and than calls close() to free remaining resources. Note that in Jena TDB a named model is deleted if no more triples with the given context are present within the Quad store of the Jena TDB DatasetGraph.