[hibernate-issues] [Hibernate-JIRA] Updated: (HHH-2907) ability to apply 'generation strategy' to generated properties

ability to apply 'generation strategy' to generated properties -------------------------------------------------------------- Key: HHH-2907 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2907 Project: Hibernate Core Issue Type: New Feature Components: core Reporter: Steve Ebersole Assignee: Steve Ebersole Priority: Minor Fix For: 3.6 Currently, the support for generated properties allows only for db-generated values (ala triggers etc). Would be great to allow the user to provide a seperate (optional) strategy for generating the generated values. It would be nice to have a generic solution, which we can build on top of for the more common use cases. Also, we may need to use a name other than 'generated' in the annotations to avoid conflicts with the current @Generated annotation; for now lets use the term @Dynamic. Consider mapping a 'created timestamp' column. Currently, provided we are using a trigger, that would look like: @Generated(INSERT) Date created; The strategy here (^^) is implicitly 'db', as the db is taking care of the generation. In the most generic form, that could be written as: @Dynamic(time=INSERT,strategy=DB) Date created; Additionally, since this is such a common case, also allow this: @CreationTimestamp Date created; The final form would also allow the definition of strategies. As an example, consider: @CreationTimestamp(strategy=NOW) Date created; Here we are not relying on the db to generate the value, but are explicitly telling Hibernate to do it (basically 'use the current timestamp to generate a value here whenever we do an insert').