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

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.Delta

All Implemented Interfaces:

Graph, GraphAdd

public class Delta

extends Dyadic

implements Graph

Graph operation for wrapping a base graph and leaving it unchanged while recording all the attempted updates for later access.

TODO review in the light of GraphWrapper

Author:

hedgehog

Field Summary

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

emptyGraph

Constructor Summary

Delta(Graph base)

Method Summary

void	close() Free all resources, any further use of this Graph is an error.
ExtendedIterator	find(TripleMatch tm) Find all the base triples matching tm, exclude the ones that are deleted, add the ones that have been added.
Graph	getAdditions() Answer the graph of all triples added
Graph	getDeletions() Answer the graph of all triples removed
void	performAdd(Triple t) Add the triple to the graph, ie add it to the additions, remove it from the removals.
void	performDelete(Triple t) Remove the triple, ie, remove it from the adds, add it to the removals.
int	size() For a concrete graph this returns the number of triples in the graph.

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

dependsOn, union

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

butNot, contains, countIterator, ifIn, ifIn, recording, reject, rejecting

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

add, contains, delete, find, getBulkUpdateHandler, getCapabilities, getEventManager, getPrefixMapping, getReifier, getTransactionHandler, isEmpty, isIsomorphicWith, notifyAdd, notifyDelete, queryHandler, 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

contains, contains, delete, dependsOn, find, getBulkUpdateHandler, getCapabilities, getEventManager, getPrefixMapping, getReifier, getTransactionHandler, isEmpty, isIsomorphicWith, queryHandler

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

add

Constructor Detail

Delta

public Delta(Graph base)

Method Detail

getAdditions

public Graph getAdditions()

Answer the graph of all triples added

getDeletions

public Graph getDeletions()

Answer the graph of all triples removed

performAdd

public void performAdd(Triple t)

Add the triple to the graph, ie add it to the additions, remove it from the removals.

performDelete

public void performDelete(Triple t)

Remove the triple, ie, remove it from the adds, add it to the removals.

find

public ExtendedIterator find(TripleMatch tm)

Find all the base triples matching tm, exclude the ones that are deleted, add the ones that have been added.

Specified by:

find in interface Graph

See Also:

Graph.find(TripleMatch)

close

public void close()

Description copied from interface: Graph

Free all resources, any further use of this Graph is an error.

Specified by:

close in interface Graph

Overrides:

close in class Dyadic

size

public int size()

Description copied from interface: Graph

For a concrete graph this returns the number of triples in the graph. For graphs which might infer additional triples it results an estimated lower bound of the number of triples. For example, an inference graph might return the number of triples in the raw data graph.

Specified by:

size in interface Graph

Overrides:

size in class CompositionBase

Returns:

The integer triple count

See Also:

Graph.size()