Null component - where to create

sksamuel · **Joined:** Sat Jun 09, 2007 10:54 am **Posts:** 8

Hello,

I have an Advert object that contains an embedded component, Location, which contains details of the Location of the Advert if it can be collected.

I want to create a Location object when an Advert is first created, defaulting to the owner of the adverts postcode, but they can remove the postcode if they want to later.

Now if I create a Location object in the default no args constructor of Advert, when retrieving Adverts from the database, will Hibernate correctly nullify these if the values of the component fields in the database are null ?

batmat · **Posted:** Sun Jun 10, 2007 12:09 pm

Did you read the reference documentation about components : http://www.hibernate.org/hib_docs/v3/re ... components ?

I think that's what you're asking :

Quote:

The null value semantics of a component are ad hoc. When reloading the containing object, Hibernate will assume that if all component columns are null, then the entire component is null.