Package org.apache.cayenne.access

Class ObjectDiff

java.lang.Object

org.apache.cayenne.graph.NodeDiff

org.apache.cayenne.access.ObjectDiff

All Implemented Interfaces:

Serializable, Comparable<NodeDiff>, GraphDiff

public class ObjectDiff
extends NodeDiff

A dynamic GraphDiff that represents a delta between object simple properties at diff creation time and its current state.

See Also:

• Serialized Form

Field Summary

Fields inherited from class org.apache.cayenne.graph.NodeDiff

diffId, nodeId

Method Summary

Modifier and Type	Method	Description
void	apply(GraphChangeHandler handler)	Calls appropriate methods on the handler to "replay" this change.
ObjectId	getArcSnapshotValue(String propertyName)
ObjectId	getCurrentArcSnapshotValue(String propertyName)
Object	getSnapshotValue(String propertyName)
boolean	isNoop()	Checks whether at least a single property is modified.
void	undo(GraphChangeHandler handler)	Calls appropriate methods on the handler to revert this change.

Methods inherited from class org.apache.cayenne.graph.NodeDiff

compareTo, getDiffId, getNodeId, setDiffId

Methods inherited from class java.lang.Object

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

Method Details

getSnapshotValue

public Object getSnapshotValue(String propertyName)

getArcSnapshotValue

public ObjectId getArcSnapshotValue(String propertyName)

getCurrentArcSnapshotValue

public ObjectId getCurrentArcSnapshotValue(String propertyName)

Since:

4.2

isNoop

public boolean isNoop()

Checks whether at least a single property is modified.

Specified by:

isNoop in interface GraphDiff

Overrides:

isNoop in class NodeDiff

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

Specified by:

undo in class NodeDiff

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

Specified by:

apply in class NodeDiff