ObjectStoreGraphDiff (cayenne-doc: Cayenne Documentation 4.2 API)

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

All Methods Instance Methods Concrete Methods
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 Detail
  - 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