org.apache.jena.sparql.core

Class GraphView

java.lang.Object

org.apache.jena.graph.impl.GraphBase

org.apache.jena.sparql.core.GraphView

All Implemented Interfaces:

org.apache.jena.atlas.lib.Sync, Graph, GraphWithPerform

Direct Known Subclasses:

GraphInMemory

public class GraphView
extends GraphBase
implements org.apache.jena.atlas.lib.Sync

Implement a Graph as a view of the DatasetGraph. It maps graph operations to quad operations. GraphUnionRead provides a union graph that does not assume quads, but loops on graphs.

See Also:

GraphUnionRead

Field Summary

Fields inherited from class org.apache.jena.graph.impl.GraphBase

TOSTRING_TRIPLE_BASE, TOSTRING_TRIPLE_LIMIT

Fields inherited from interface org.apache.jena.graph.Graph

emptyGraph

Method Summary

Modifier and Type	Method and Description
static GraphView	createDefaultGraph(DatasetGraph dsg)
static GraphView	createNamedGraph(DatasetGraph dsg, Node graphIRI)
static GraphView	createUnionGraph(DatasetGraph dsg)
Capabilities	getCapabilities()
DatasetGraph	getDataset() Return the DatasetGraph we are viewing.
Node	getGraphName() Return the graph name for this graph in the dataset it is a view of.
void	performAdd(Triple t)
void	performDelete(Triple t)
void	sync()

Methods inherited from class org.apache.jena.graph.impl.GraphBase

add, clear, close, contains, contains, delete, dependsOn, find, find, forTestingOnly_graphBaseFind, getEventManager, getPrefixMapping, getStatisticsHandler, getTransactionHandler, isClosed, isEmpty, isIsomorphicWith, notifyAdd, notifyDelete, remove, size, toString, toString

Methods inherited from class java.lang.Object

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

Method Detail

createDefaultGraph

public static GraphView createDefaultGraph(DatasetGraph dsg)

createNamedGraph

public static GraphView createNamedGraph(DatasetGraph dsg,
                                         Node graphIRI)

createUnionGraph

public static GraphView createUnionGraph(DatasetGraph dsg)

getGraphName

public Node getGraphName()

Return the graph name for this graph in the dataset it is a view of. Returns null for the default graph.

getDataset

public DatasetGraph getDataset()

Return the DatasetGraph we are viewing.

performAdd

public void performAdd(Triple t)

Specified by:

performAdd in interface GraphWithPerform

Overrides:

performAdd in class GraphBase

performDelete

public void performDelete(Triple t)

Specified by:

performDelete in interface GraphWithPerform

Overrides:

performDelete in class GraphBase

sync

public void sync()

Specified by:

sync in interface org.apache.jena.atlas.lib.Sync

getCapabilities

public Capabilities getCapabilities()

Specified by:

getCapabilities in interface Graph

Overrides:

getCapabilities in class GraphBase