Lifecycle (Hibernate Core Aggregator 3.6.10.Final API)

```
public interface Lifecycle
```
Provides callbacks from the Session to the persistent object. Persistent classes may implement this interface but they are not required to.

onSave: called just before the object is saved
onUpdate: called just before an object is updated, ie. when Session.update() is called
onDelete: called just before an object is deleted
onLoad: called just after an object is loaded

onLoad() may be used to initialize transient properties of the object from its persistent state. It may not be used to load dependent objects since the Session interface may not be invoked from inside this method.

A further intended usage of onLoad(), onSave() and onUpdate() is to store a reference to the Session for later use.

If onSave(), onUpdate() or onDelete() return VETO, the operation is silently vetoed. If a CallbackException is thrown, the operation is vetoed and the exception is passed back to the application.

Note that onSave() is called after an identifier is assigned to the object, except when identity column key generation is used.

Author:

Gavin King

See Also:
CallbackException

Field Summary

Fields
Modifier and Type Field and Description

static boolean NO_VETO
Return value to accept the action (false)

static boolean VETO
Return value to veto the action (true)

Fields
Modifier and Type	Field and Description
`static boolean`	`NO_VETO` Return value to accept the action (false)
`static boolean`	`VETO` Return value to veto the action (true)

Method Summary

Methods
Modifier and Type	Method and Description
`boolean`	`onDelete(Session s)` Called when an entity is deleted.
`void`	`onLoad(Session s, Serializable id)` Called after an entity is loaded.
`boolean`	`onSave(Session s)` Called when an entity is saved.
`boolean`	`onUpdate(Session s)` Called when an entity is passed to `Session.update()`.

- Field Detail
  - VETO
```
static final boolean VETO
```
    Return value to veto the action (true)
    
    See Also:
    Constant Field Values
  - NO_VETO
```
static final boolean NO_VETO
```
    Return value to accept the action (false)
    
    See Also:
    Constant Field Values
- Method Detail
  - onSave
```
boolean onSave(Session s)
               throws CallbackException
```
    Called when an entity is saved.
    
    Parameters:
    s - the session
    
    Returns:
    true to veto save
    
    Throws:
    
    CallbackException
  - onUpdate
```
boolean onUpdate(Session s)
                 throws CallbackException
```
    Called when an entity is passed to Session.update(). This method is not called every time the object's state is persisted during a flush.
    
    Parameters:
    s - the session
    
    Returns:
    true to veto update
    
    Throws:
    
    CallbackException
  - onDelete
```
boolean onDelete(Session s)
                 throws CallbackException
```
    Called when an entity is deleted.
    
    Parameters:
    s - the session
    
    Returns:
    true to veto delete
    
    Throws:
    
    CallbackException
  - onLoad
```
void onLoad(Session s,
          Serializable id)
```
    Called after an entity is loaded. It is illegal to access the Session from inside this method. However, the object may keep a reference to the session for later use.
    
    Parameters:
    s - the session
    id - the identifier

Interface Lifecycle

Field Summary

Method Summary

Field Detail

VETO

NO_VETO

Method Detail

onSave

onUpdate

onDelete

onLoad