org.exolab.castor.persist.spi
Interface CallbackInterceptor

All Known Implementing Classes:

JDOCallback

public interface CallbackInterceptor

A callback interceptor informs objects about changes to their state. Different callbacks can cause different methods to be called on the objects.

Version:

$Revision: 8104 $ $Date: 2005-04-17 04:29:33 -0600 (Sun, 17 Apr 2005) $

Author:

Assaf Arkin

Method Summary

void	created(Object object) Called to indicate that an object has been created.
void	creating(Object object, Database db) Called to indicate that an object is to be created in persistent storage.
Class<?>	loaded(Object object, AccessMode accessMode) Called to indicate that the object has been loaded from persistent storage.
void	releasing(Object object, boolean committed) Called to indicate that an object has been made transient.
void	removed(Object object) Called to indicate that an object has been deleted.
void	removing(Object object) Called to indicate that an object is to be deleted.
void	storing(Object object, boolean modified) Called to indicate that an object is to be stored in persistent storage.
void	updated(Object object) Called to indicate that an object has been updated at the end of a "long" transaction.
void	using(Object object, Database db) Called to indicate that an object has been made persistent.

Method Detail

loaded

Class<?> loaded(Object object,
                AccessMode accessMode)
                throws Exception

Called to indicate that the object has been loaded from persistent storage.

Parameters:

object - The object

Returns:

null or the extending Class. In the latter case Castor will reload the object of the given class with the same identity.

Throws:

Exception - An exception occured, the object cannot be loaded

storing

void storing(Object object,
             boolean modified)
             throws Exception

Called to indicate that an object is to be stored in persistent storage.

Parameters:

object - The object

modified - Is the object modified?

Throws:

Exception - An exception occured, the object cannot be stored

creating

void creating(Object object,
              Database db)
              throws Exception

Called to indicate that an object is to be created in persistent storage.

Parameters:

object - The object

db - The database in which this object will be created

Throws:

Exception

created

void created(Object object)
             throws Exception

Called to indicate that an object has been created.

Parameters:

object - The object

Throws:

Exception

removing

void removing(Object object)
              throws Exception

Called to indicate that an object is to be deleted.

This method is made at commit time on objects deleted during the transaction before setting their fields to null.

Parameters:

object - The object

Throws:

Exception

removed

void removed(Object object)
             throws Exception

Called to indicate that an object has been deleted.

This method is called during db.remove().

Parameters:

object - The object

Throws:

Exception

releasing

void releasing(Object object,
               boolean committed)

Called to indicate that an object has been made transient.

This method is made at commit or rollback time on all objects that were presistent during the life time of the transaction.

Parameters:

object - The object

committed - True if the object has been commited, false if rollback or otherwise cancelled

using

void using(Object object,
           Database db)

Called to indicate that an object has been made persistent.

Parameters:

object - The object

db - The database to which this object belongs

updated

void updated(Object object)
             throws Exception

Called to indicate that an object has been updated at the end of a "long" transaction.

Parameters:

object - The object

Throws:

Exception