org.apache.jena.graph.compose

Class Difference

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.Difference

All Implemented Interfaces:

Graph, GraphWithPerform

public class Difference
extends Dyadic
implements Graph

Class representing the dynamic set difference L - R of two graphs. This is updatable; the updates are written through to one or other of the base graphs.

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
Difference(Graph L, Graph R) Initialise a graph representing the difference L - R.

Method Summary

Modifier and Type	Method and Description
ExtendedIterator<Triple>	_graphBaseFind(Triple t) The method that the overridden graphBaseFind( TripleMatch m ) calls to actually do the work of finding.
void	performAdd(Triple t) Add a triple to the difference: add it to the left operand, and remove it from the right operand.
void	performDelete(Triple t) Remove a triple from the difference: remove it from the left operand.

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

Difference

public Difference(Graph L,
                  Graph R)

Initialise a graph representing the difference L - R.

Method Detail

performAdd

public void performAdd(Triple t)

Add a triple to the difference: add it to the left operand, and remove it from the right operand.

Specified by:

performAdd in interface GraphWithPerform

Overrides:

performAdd in class GraphBase

performDelete

public void performDelete(Triple t)

Remove a triple from the difference: remove it from the left operand. [It could be added to the right operand instead, but somehow that feels less satisfactory.]

Specified by:

performDelete in interface GraphWithPerform

Overrides:

performDelete in class GraphBase

_graphBaseFind

public ExtendedIterator<Triple> _graphBaseFind(Triple t)

Description copied from class: Dyadic

The method that the overridden graphBaseFind( TripleMatch m ) calls to actually do the work of finding.