com.hp.hpl.jena.sparql.core

Class DatasetGraphCaching

java.lang.Object

com.hp.hpl.jena.sparql.core.DatasetGraphBase

com.hp.hpl.jena.sparql.core.DatasetGraphBaseFind

com.hp.hpl.jena.sparql.core.DatasetGraphTriplesQuads

com.hp.hpl.jena.sparql.core.DatasetGraphCaching

All Implemented Interfaces:

DatasetGraph, Closeable

Direct Known Subclasses:

DatasetGraphSimpleMem

public abstract class DatasetGraphCaching
extends DatasetGraphTriplesQuads

DatasetGraph that caches calls to make graph implementations. Useful for storage layers that use triples+quads storage and the graphs are wrappers to the actual storage layer. The cache is finite and graphs will be dropped as needed. DatasetGraphMap provides an implementation which is an extensable collection of graphs.

Method Summary

Methods

Modifier and Type	Method and Description
void	addGraph(Node graphName, Graph graph) Add the given graph to the dataset.
void	close() Close the dataset
boolean	containsGraph(Node graphNode)
Graph	getDefaultGraph() Get the default graph as a Jena Graph
Graph	getGraph(Node graphNode) Get the graph named by graphNode : returns null on no graph NB Whether a dataset contains a graph if there are no triples is not defined - see the specifc implementation.
void	removeGraph(Node graphName) Remove all data associated with the named graph

Methods inherited from class com.hp.hpl.jena.sparql.core.DatasetGraphTriplesQuads

add, add, delete, delete

Methods inherited from class com.hp.hpl.jena.sparql.core.DatasetGraphBaseFind

find, findNG

Methods inherited from class com.hp.hpl.jena.sparql.core.DatasetGraphBase

contains, contains, deleteAny, find, find, getContext, getLock, isEmpty, setDefaultGraph, size, toString

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface com.hp.hpl.jena.sparql.core.DatasetGraph

listGraphNodes

Method Detail

containsGraph

public boolean containsGraph(Node graphNode)

Specified by:

containsGraph in interface DatasetGraph

Overrides:

containsGraph in class DatasetGraphBase

getDefaultGraph

public final Graph getDefaultGraph()

Description copied from interface: DatasetGraph

Get the default graph as a Jena Graph

Specified by:

getDefaultGraph in interface DatasetGraph

Specified by:

getDefaultGraph in class DatasetGraphBase

getGraph

public final Graph getGraph(Node graphNode)

Description copied from interface: DatasetGraph

Get the graph named by graphNode : returns null on no graph NB Whether a dataset contains a graph if there are no triples is not defined - see the specifc implementation. Some datasets are "open" - they have all graphs even if no triples,

Specified by:

getGraph in interface DatasetGraph

Specified by:

getGraph in class DatasetGraphBase

addGraph

public void addGraph(Node graphName,
            Graph graph)

Description copied from interface: DatasetGraph

Add the given graph to the dataset. Replaces any existing data for the named graph; to add data, get the graph and add triples to it, or add quads to the dataset. Do not assume that the same Java object is returned by DatasetGraph.getGraph(com.hp.hpl.jena.graph.Node)

Specified by:

addGraph in interface DatasetGraph

Overrides:

addGraph in class DatasetGraphBase

removeGraph

public final void removeGraph(Node graphName)

Description copied from interface: DatasetGraph

Remove all data associated with the named graph

Specified by:

removeGraph in interface DatasetGraph

Overrides:

removeGraph in class DatasetGraphBase

close

public void close()

Description copied from interface: DatasetGraph

Close the dataset

Specified by:

close in interface DatasetGraph

Specified by:

close in interface Closeable

Overrides:

close in class DatasetGraphBase