EntityCopyObserver (Hibernate JavaDocs)

```
public interface EntityCopyObserver
```
An observer for detection of multiple entity representations for a persistent entity being merged.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`clear()`	Called to clear any data stored in this EntityCopyObserver.
`void`	`entityCopyDetected(java.lang.Object managedEntity, java.lang.Object mergeEntity1, java.lang.Object mergeEntity2, EventSource session)`	Called when more than one representation of the same persistent entity is being merged.
`void`	`topLevelMergeComplete(EventSource session)`	Called when the top-level merge operation is complete.

- Method Detail
  - entityCopyDetected
```
void entityCopyDetected(java.lang.Object managedEntity,
                        java.lang.Object mergeEntity1,
                        java.lang.Object mergeEntity2,
                        EventSource session)
```
    Called when more than one representation of the same persistent entity is being merged.
    
    Parameters:
    
    managedEntity - The managed entity in the persistence context (the merge result).
    
    mergeEntity1 - A managed or detached entity being merged; must be non-null.
    
    mergeEntity2 - A different managed or detached entity being merged; must be non-null.
    
    session - The session.
  - topLevelMergeComplete
```
void topLevelMergeComplete(EventSource session)
```
    Called when the top-level merge operation is complete.
    
    Parameters:
    
    session - The session
  - clear
```
void clear()
```
    Called to clear any data stored in this EntityCopyObserver.