[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-2658) The ability to have new entities created at runtime.

[charbel (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-2658?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_27170 ] 

charbel commented on HHH-2658:
------------------------------

They are temporary during a client request, or during a specific treatement. After, the entity definition with its table can be dropped.
It can be each time a new entityname using definitions of another created one. If we can add new entity definition once the sessionfactory is created, then the pb is solved.

About synchronization, of course this kind of functionnality should only be used in only some cases:
 - We can add only new entities.  The new entities shouldn't affect the existing ones (example: new subclass...)
 - We can't modify existing ones.
 - Before removing entities, no other remaining ones should point to the one that we want to delete.

And it is in charge of the developper to take care of synchronization between sessions using temporary objects and removal of entities in sessionfactory.
Don't you think that we can have only simple cases of adding new entities to start ...

> The ability to have new entities created at runtime.
> ----------------------------------------------------
>
>                 Key: HHH-2658
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2658
>             Project: Hibernate3
>          Issue Type: New Feature
>            Reporter: charbel
>
> Sometimes we would like to create a temporary table of  a given entity, so it would be great if we can add at runtime a new entity in the session factory, a copy of a given one with just the tablename changed.
> Example:
> --------------
> sessionfactory.addEntity(already_created_entity_name,table_parameters)

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