com.hp.hpl.jena.sparql.modify

Class GraphStoreNull

java.lang.Object

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

com.hp.hpl.jena.sparql.core.DatasetGraphQuad

com.hp.hpl.jena.sparql.modify.GraphStoreNull

All Implemented Interfaces:

DatasetGraph, GraphStore, Closeable

Direct Known Subclasses:

GraphStoreNullTransactional

public class GraphStoreNull
extends DatasetGraphQuad
implements GraphStore

A black hole for Quads, add as many as you want and it will forget them all. Useful for testing.

Constructor Summary

Constructors

Constructor and Description
GraphStoreNull()

Method Summary

Methods

Modifier and Type	Method and Description
void	add(Quad quad) Add a quad
void	delete(Quad quad) Delete a quad
Iterator<Quad>	find(Node g, Node s, Node p, Node o) Find matching quads in the dataset (including default graph) - may include wildcards, Node.ANY or null
Iterator<Quad>	findNG(Node g, Node s, Node p, Node o) Find matching quads in the dataset in named graphs only - may include wildcards, Node.ANY or null
void	finishRequest() Signal end of a request being executed
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	startRequest() Signal start of a request being executed
Dataset	toDataset() Convert to a dataset (for query)

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

listGraphNodes, removeGraph

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

add, addGraph, close, contains, contains, containsGraph, delete, 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

add, addGraph, close, contains, contains, containsGraph, delete, deleteAny, find, find, getContext, getLock, isEmpty, listGraphNodes, removeGraph, setDefaultGraph, size

Constructor Detail

GraphStoreNull

public GraphStoreNull()

Method Detail

find

public Iterator<Quad> find(Node g,
                  Node s,
                  Node p,
                  Node o)

Description copied from interface: DatasetGraph

Find matching quads in the dataset (including default graph) - may include wildcards, Node.ANY or null

Specified by:

find in interface DatasetGraph

Specified by:

find in class DatasetGraphQuad

See Also:

Graph.find(Node,Node,Node)

findNG

public Iterator<Quad> findNG(Node g,
                    Node s,
                    Node p,
                    Node o)

Description copied from interface: DatasetGraph

Find matching quads in the dataset in named graphs only - may include wildcards, Node.ANY or null

Specified by:

findNG in interface DatasetGraph

Specified by:

findNG in class DatasetGraphQuad

See Also:

Graph.find(Node,Node,Node)

add

public void add(Quad quad)

Description copied from interface: DatasetGraph

Add a quad

Specified by:

add in interface DatasetGraph

Specified by:

add in class DatasetGraphQuad

delete

public void delete(Quad quad)

Description copied from interface: DatasetGraph

Delete a quad

Specified by:

delete in interface DatasetGraph

Specified by:

delete in class DatasetGraphQuad

getDefaultGraph

public 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 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

toDataset

public Dataset toDataset()

Description copied from interface: GraphStore

Convert to a dataset (for query)

Specified by:

toDataset in interface GraphStore

startRequest

public void startRequest()

Description copied from interface: GraphStore

Signal start of a request being executed

Specified by:

startRequest in interface GraphStore

finishRequest

public void finishRequest()

Description copied from interface: GraphStore

Signal end of a request being executed

Specified by:

finishRequest in interface GraphStore