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From Craig Russell <Craig.Russ...@Sun.COM>
Subject Re: Company model for JDO 2.0 TCK
Date Tue, 19 Apr 2005 14:47:59 GMT
Hi David,

I'll take a look at this idea. I had thought that it made sense to 
allow the entire model to be represented by interfaces, but I'll see.

I still don't understand what the down side is, though.

Craig

On Apr 18, 2005, at 11:25 AM, David Jordan wrote:

>
> Do you really need to make everything based on interfaces
> and abstract classes? It may make more sense to just do this
> for one part of the model, enough to test the functionality
> that needs to be tested.
>
> David Jordan
> Object Identity, Inc.
>
>
> -----Original Message-----
> From: Craig Russell [mailto:Craig.Russell@Sun.COM]
> Sent: Monday, April 18, 2005 2:16 PM
> To: JDO Expert Group; jdo-dev@db.apache.org; jdo-tck-ext@Sun.COM
> Subject: Company model for JDO 2.0 TCK
>
> Hi,
>
> Currently the Company model has concrete classes for the domain model.
> Since JDO 2.0 supports abstract classes and interfaces to directly
> model persistence, I'd like to propose refactoring the domain classes
> into three different parts per domain class, using Company as the
> example:
>
> ICompany: the interface that declares only the get/set properties
> ACompany: the abstract class that extends ICompany and declares and
> implements the equals, compareTo, deepCompareFields, and hashCode
> methods
> Company: the concrete class that extends ACompany. This class declares
> fields and implements the accessors of the class.
>
> This would allow existing code that uses Company to continue unchanged,
> as the Company contract is not changed. However, it would allow us to
> test the JDO 2.0 feature of persistent abstract classes and interfaces.
>
> The downside of making the change is that it triples the number of
> .java files and might be confusing.
>
> What do you all think?
>
> Craig
>
> Craig Russell
> Architect, Sun Java Enterprise System http://java.sun.com/products/jdo
> 408 276-5638 mailto:Craig.Russell@sun.com
> P.S. A good JDO? O, Gasp!
>
>
Craig Russell
Architect, Sun Java Enterprise System http://java.sun.com/products/jdo
408 276-5638 mailto:Craig.Russell@sun.com
P.S. A good JDO? O, Gasp!

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