Module org.apache.jena.arq

Package org.apache.jena.sparql.graph

Class GraphUnionRead

java.lang.Object

org.apache.jena.graph.impl.GraphBase

org.apache.jena.sparql.graph.GraphUnionRead

All Implemented Interfaces:

Graph, GraphWithPerform

public class GraphUnionRead
extends GraphBase

Immutable graph that is the view of a union of graphs in a dataset. This union can be a fixed set of graph or all named graph. This union iterates over graphs.

GraphView provides a view over a dataset and does support union graph but assumes quad access is efficient and does not end up looping.

See Also:

• GraphView
• DatasetGraphMap

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

Constructor Summary

Constructors

Constructor	Description
GraphUnionRead(DatasetGraph dsg)	Read-only graph view of all named graphs in the dataset.
GraphUnionRead(DatasetGraph dsg, Collection<Node> graphs)	Read-only graph view of a set of graphs from the dataset

Method Summary

Modifier and Type	Method	Description
TransactionHandler	getTransactionHandler()
void	performAdd(Triple t)
void	performDelete(Triple t)

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

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

Methods inherited from class java.lang.Object

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

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

add, delete, find, stream, stream

Constructor Details

GraphUnionRead

public GraphUnionRead(DatasetGraph dsg)

Read-only graph view of all named graphs in the dataset. If graphs are added after this view if created, then this is reflected in the find call.

GraphUnionRead

public GraphUnionRead(DatasetGraph dsg,
 Collection<Node> graphs)

Read-only graph view of a set of graphs from the dataset

Method Details

getTransactionHandler

public TransactionHandler getTransactionHandler()

Specified by:

getTransactionHandler in interface Graph

Overrides:

getTransactionHandler in class GraphBase

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