com.hp.hpl.jena.graph.compose
Class Difference

java.lang.Object
  com.hp.hpl.jena.graph.impl.GraphBase
      com.hp.hpl.jena.graph.compose.CompositionBase
          com.hp.hpl.jena.graph.compose.Dyadic
              com.hp.hpl.jena.graph.compose.Difference

All Implemented Interfaces:

Graph, GraphAdd, com.hp.hpl.jena.graph.impl.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.

Author:

hedgehog

Field Summary

Fields inherited from class com.hp.hpl.jena.graph.impl.GraphBase

TOSTRING_TRIPLE_BASE, TOSTRING_TRIPLE_LIMIT

Fields inherited from interface com.hp.hpl.jena.graph.Graph

emptyGraph

Constructor Summary

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

Method Summary

com.hp.hpl.jena.util.iterator.ExtendedIterator<Triple>	graphBaseFind(TripleMatch t)
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 com.hp.hpl.jena.graph.compose.Dyadic

close, dependsOn, getL, getR, union

Methods inherited from class com.hp.hpl.jena.graph.compose.CompositionBase

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

Methods inherited from class com.hp.hpl.jena.graph.impl.GraphBase

add, contains, contains, delete, find, find, forTestingOnly_graphBaseFind, getBulkUpdateHandler, getCapabilities, getEventManager, getPrefixMapping, getReifier, getStatisticsHandler, getTransactionHandler, isClosed, isEmpty, isIsomorphicWith, notifyAdd, notifyDelete, queryHandler, size, toString, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.hp.hpl.jena.graph.Graph

close, contains, contains, delete, dependsOn, find, find, getBulkUpdateHandler, getCapabilities, getEventManager, getPrefixMapping, getReifier, getStatisticsHandler, getTransactionHandler, isClosed, isEmpty, isIsomorphicWith, queryHandler, size

Methods inherited from interface com.hp.hpl.jena.graph.GraphAdd

add

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 com.hp.hpl.jena.graph.impl.GraphWithPerform

Overrides:

performAdd in class com.hp.hpl.jena.graph.impl.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 com.hp.hpl.jena.graph.impl.GraphWithPerform

Overrides:

performDelete in class com.hp.hpl.jena.graph.impl.GraphBase

graphBaseFind

public com.hp.hpl.jena.util.iterator.ExtendedIterator<Triple> graphBaseFind(TripleMatch t)

Specified by:

graphBaseFind in class com.hp.hpl.jena.graph.impl.GraphBase