embeddedId

pierre-henry · **Posted:** Mon Jan 08, 2007 10:11 am

I am studying the embeddedId sample model -in ch7/listing7.1- and a question that comes to me is how to persist it because an id is a

Code:

Long

at final?

christian · **Posted:** Mon Jan 08, 2007 11:12 am

I do not understand your question. I'm surprised; a few weeks ago you had questions about Hello World, now you are trying to work on the most complex and difficult mapping in the whole book? Are you sure you need that?

pierre-henry · **Posted:** Mon Jan 08, 2007 11:50 am

Christian,

Yes, I'm very 'eager' ;-) ...

If I need it ?

Yes, I have a complex type made of two keys-a link key- and I need synchonize on another base. So I compare update a java table with the ID of record in this complex type to then compare to loaded type.

Anyway, I need to wrote the DAO for this type, and this is what makes me wonder....

christian · **Posted:** Mon Jan 08, 2007 11:52 am

I still do not understand you.

pierre-henry · **Posted:** Mon Jan 08, 2007 11:56 am

ok,
my question is:

In listing 7.1/p304 the id is of type Id. My DAO is waiting for Long type, so how do I manage this complex type?

christian · **Posted:** Mon Jan 08, 2007 1:55 pm

Change your DAO. Read chapter 16.

pierre-henry · **Posted:** Tue Jan 09, 2007 5:16 am

Christian,

I have extended a type DAO, TypeDAO with type interface <T, ID extends Serializable> and that's ok.

But when I want to implement a TypeDAOHibernate which implements TypeDAO compiler returns following message:

-------------
The interface DAO cannot be implemented more than once with different arguments: DAO and DAO<TypeQuantite,LnkTypeQteTitle.LinkId> dao/type/hibernate LnkTypeQteDAOHibernate.java line 10
_________

I dont understand this message, can you light me ?

thx

christian · **Posted:** Tue Jan 09, 2007 5:17 am

Why don't you download the source code for the book?

pierre-henry · **Posted:** Tue Jan 09, 2007 8:10 am

Christian,

I've found in this chapter all what I needed.

thx