Package org.apache.cayenne.access

Class ObjectStoreGraphDiff

java.lang.Object

org.apache.cayenne.access.ObjectStoreGraphDiff

All Implemented Interfaces:

Serializable, GraphDiff

public class ObjectStoreGraphDiff
extends Object
implements GraphDiff

A GraphDiff facade for the ObjectStore changes. Provides a way for the lower layers of the access stack to speed up processing of presorted ObjectStore diffs.

Since:

1.2

See Also:

• Serialized Form

Method Summary

Modifier and Type	Method	Description
void	apply(GraphChangeHandler handler)	Calls appropriate methods on the handler to "replay" this change.
Map<Object,ObjectDiff>	getChangesByObjectId()
boolean	isNoop()	Returns true if this diff is simply a placeholder and does not perform any actual operation.
void	undo(GraphChangeHandler handler)	Calls appropriate methods on the handler to revert this change.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

getChangesByObjectId

public Map<Object,ObjectDiff> getChangesByObjectId()

isNoop

public boolean isNoop()

Description copied from interface: GraphDiff

Returns true if this diff is simply a placeholder and does not perform any actual operation.

Specified by:

isNoop in interface GraphDiff

apply

public void apply(GraphChangeHandler handler)

Description copied from interface: GraphDiff

Calls appropriate methods on the handler to "replay" this change.

Specified by:

apply in interface GraphDiff

undo

public void undo(GraphChangeHandler handler)

Description copied from interface: GraphDiff

Calls appropriate methods on the handler to revert this change.

Specified by:

undo in interface GraphDiff