craIg,
i posted to the alias you mentioned also, but either here or there, could you help interpret the section of the spec i mentioned? if it's not saying that we can use the four java collection interfaces to define persistent fields, what is it saying?
thanks!
Collection-valued persistent fields and properties must be defined in terms of one of the following collection-valued interfaces regardless of whether the entity class otherwise adheres to the JavaBeans method conventions noted above and whether field or property-based access is used: java.util.Collection, java.util.Set, java.util.List[4], java.util.Map.[5] For collection-valued persistent properties, type T must be one of these collection interface types in the method signatures above. Generic variants of these collection types may also be used (for example, Set<Order>).
In addition to returning and setting the persistent state of the instance, the property accessor methods may contain other business logic as well, for example, to perform validation. The persistence provider runtime executes this logic when property-based access is used.
Craig L Russell <Craig.Russell_at_Sun.COM> wrote: Hi Jon,
This is a specification issue.
You might consider commenting at ejb3-spec-feedback_at_sun.com and see
what the experts have to say.
Craig
On Mar 4, 2007, at 8:08 PM, Sanjeeb Kumar Sahoo wrote:
> It was never suggested that the interface be Serializable. The
> field can use an implementation that's Serializable.
>
> Thanks,
> Sahoo
>
> Jon Miller wrote:
>> IMHO, it should be OK to use the List interface as long as it
>> points to a class that implements Serializable. i.e. List
>> property = ArrayList(); should work. Why should the
>> interface have to be serializable? I don't like the idea of having
>> to hard code it to a concrete type.
>>
>> Jon
Craig Russell
Architect, Sun Java Enterprise System
http://java.sun.com/products/jdo
408 276-5638 mailto:Craig.Russell_at_sun.com
P.S. A good JDO? O, Gasp!
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