EntityCopyObserver (hibernate-jdk11 5.4.12.Final API)

所有已知实现类:

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

作者:

Gail Badner

方法概要

所有方法实例方法抽象方法
修饰符和类型	方法	说明
`void`	`clear()`	Called to clear any data stored in this EntityCopyObserver.
`void`	`entityCopyDetected(Object managedEntity, Object mergeEntity1, 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.

- 方法详细资料
  - entityCopyDetected
```
void entityCopyDetected(Object managedEntity,
                        Object mergeEntity1,
                        Object mergeEntity2,
                        EventSource session)
```
    Called when more than one representation of the same persistent entity is being merged.
    
    参数:
    
    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.
    
    参数:
    
    session - The session
  - clear
```
void clear()
```
    Called to clear any data stored in this EntityCopyObserver.