org.openanzo.model.replica
Class ReplicaGraph

java.lang.Object
  org.openanzo.model.proxy.ProxyGraph
      org.openanzo.model.proxy.NamedGraphProxy
          org.openanzo.model.replica.ReplicaGraph

All Implemented Interfaces:

INamedGraph, IProxyGraph

public class ReplicaGraph
extends NamedGraphProxy

The purpose of this class is to provide a graph wrapper that caches all queries into the base graph until the reset() method is called. An example is when two clients of a graph want to work "disconnected" from the parent graph (i.e. an editor that displays a form with values and does not want those to keep changing as the underlying graph changes).

Author:

Elias Torres (eliast@us.ibm.com )

Constructor Summary

ReplicaGraph(INamedGraph base)
Create new ReplicaGraph wrapper around a base graph

Method Summary

info.aduna.collections.iterators.CloseableIterator<org.openrdf.model.Statement>	find(org.openrdf.model.Resource subj, org.openrdf.model.URI prop, org.openrdf.model.Value obj) Return an iterator of all statements that match the pattern of subj,prop,obj
INamedGraph	getParentGraph() Get the graph to which this proxy is proxing information.
ReplicaEventManager	getReplicaEventManager() Get the replicaEvent manager for the graph
void	reset() This method will empty the cache and the matches history.

Methods inherited from class org.openanzo.model.proxy.NamedGraphProxy

getNamedGraphUri, getTransactionManager, isClosed, isMetadataGraph, setNamedGraphUri, toString

Methods inherited from class org.openanzo.model.proxy.ProxyGraph

add, add, add, clear, close, contains, contains, delete, delete, delete, getEventManager, getStatements, isEmpty, size

Methods inherited from class java.lang.Object

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

Constructor Detail

ReplicaGraph

public ReplicaGraph(INamedGraph base)

Create new ReplicaGraph wrapper around a base graph

Parameters:

base - graph to wrap

Method Detail

getParentGraph

public INamedGraph getParentGraph()

Description copied from interface: IProxyGraph

Get the graph to which this proxy is proxing information.

Specified by:

getParentGraph in interface IProxyGraph

Overrides:

getParentGraph in class NamedGraphProxy

Returns:

parent graph to which this proxy is proxing information

find

public info.aduna.collections.iterators.CloseableIterator<org.openrdf.model.Statement> find(org.openrdf.model.Resource subj,
                                                                                            org.openrdf.model.URI prop,
                                                                                            org.openrdf.model.Value obj)

Description copied from interface: INamedGraph

Return an iterator of all statements that match the pattern of subj,prop,obj

Specified by:

find in interface INamedGraph

Overrides:

find in class ProxyGraph

Parameters:

subj - Subject resource to match, or wildcard if null

prop - Predicate uri to match, or wildcard if null

obj - Object value to match, or wildcard if null

Returns:

an iterator of all statements that match the pattern of subj,prop,obj

reset

public void reset()

This method will empty the cache and the matches history. Any new find requests will go straight through the parent and cache those new results.

getReplicaEventManager

public ReplicaEventManager getReplicaEventManager()

Get the replicaEvent manager for the graph

Returns:

the replicaEvent manager for the graph