Well, access to persistence layer would go through service layer in both
cases..
The question is, which object should concern itself to building an
object which is persistence aware.
I was also leaning towards 'a converter should only do object to object
conversions. ' But I was looking towards some opinion of where the
lookup of address object from persistence before assigning to customer
should reside.. In the converter or the managed bean for customer.
MRather
Garner, Shawn wrote:
It is my opinion that the UI should not concern itself with the
persistence layer.
The UI should delegate to the service layer which should delegate to
persistence.
IMO a converter should only do object to object conversions.
What you are talking about I've seen done in the getter method of the
bean that returns the list of select items or in the constructor.
I've also seen it done in an action method of a handler backing bean.
I've heard that shale has a hook to a view to initialize things prior to
rendering too.
Shawn
-----Original Message-----
From: M Rather [mailto:[EMAIL PROTECTED]
Sent: Monday, December 17, 2007 9:33 AM
To: MyFaces Discussion
Subject: design question regarding converters - who is responsible for
building hibernate converted object
Hello,
I have a design question regarding writing converters.
I have a detail screen of entity, say for example a customer, which has
a drop-down of another entity, for example an address.
A customer has an address, and both are model objects mapped in
Hibernate.
In the detail screen of customer, I have a dropdown of addresses (why,
please ignore that, it is a simplified version of actual problem), and I
have written a SelectItems listing method which populates that address.
This field also has a converter, that takes the submitted address_id,
and builds an address object.
My question is:
Should it be the job of the converter to actually lookup an address
object from hibernate session and hand it over to customer (that way at
the time of saving customer, the customer does not have to worry about
proper linking to proper hibernate address object).
Or, should the converter just build a plain java address model object,
and customer should rehydrate it from hibernate session before saving
itself?
What is a better approach? Or is there any other practice that should be
followed?
Thanks
MRather
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