org.apache.jena.graph.compose

Class Union

java.lang.Object

org.apache.jena.graph.impl.GraphBase

org.apache.jena.graph.compose.CompositionBase

org.apache.jena.graph.compose.Dyadic

org.apache.jena.graph.compose.Union

All Implemented Interfaces:

Graph, GraphWithPerform

public class Union
extends Dyadic
implements Graph

A class representing the dynamic union of two graphs. Addition only affects the left operand, deletion affects both.

See Also:

MultiUnion

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 and Description
Union(Graph L, Graph R)

Method Summary

Modifier and Type	Method and Description
boolean	graphBaseContains(Triple t) Answer true if the graph contains any triple matching t.
void	performAdd(Triple t) To add a triple to the union, add it to the left operand; this is asymmetric.
void	performDelete(Triple t) To remove a triple, remove it from both operands.

Methods inherited from class org.apache.jena.graph.compose.Dyadic

close, dependsOn, getL, getR, union

Methods inherited from class org.apache.jena.graph.compose.CompositionBase

butNot, ifIn, ifIn, recording, reject, rejecting, rejecting

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

add, clear, contains, contains, delete, find, find, forTestingOnly_graphBaseFind, getCapabilities, 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

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

add, clear, close, contains, contains, delete, dependsOn, find, find, find, getCapabilities, getEventManager, getPrefixMapping, getStatisticsHandler, getTransactionHandler, isClosed, isEmpty, isIsomorphicWith, remove, size

Constructor Detail

Union

public Union(Graph L,
             Graph R)

Method Detail

performAdd

public void performAdd(Triple t)

To add a triple to the union, add it to the left operand; this is asymmetric.

Specified by:

performAdd in interface GraphWithPerform

Overrides:

performAdd in class GraphBase

performDelete

public void performDelete(Triple t)

To remove a triple, remove it from both operands.

Specified by:

performDelete in interface GraphWithPerform

Overrides:

performDelete in class GraphBase

graphBaseContains

public boolean graphBaseContains(Triple t)

Description copied from class: GraphBase

Answer true if the graph contains any triple matching t. The default implementation uses find and checks to see if the iterator is non-empty.