Hi Rainer, all,
Please excuse the delay in response as I have been travelling.
Yes, I think it is reasonable to extend ConstructorResult to entities.
If we do, I think it makes sense to have this mirror the semantics of
constructors in a JPQL select list-- i.e., the resulting entities
would be unmanaged.
I'm afraid I don't understand your comment below about the ordering
of constructor parameters though. Could you explain further?
thanks,
-Linda
On 4/20/2011 1:03 AM, Rainer Kwesi Schweigkoffer wrote:
> Hi Linda, all,
>
> Linda DeMichiel, am 19 Apr 2011 hast Du um 11:22 zum Thema "[jsr338-experts] Re: improved SQL result set mapp" geschrieben :
>
>>>>>> @Target(value={})
>>>>>> @Retention(value=RUNTIME)
>>>>>> public @interface ConstructorResult {
>>>>>> Class targetClass();
>>>>>> ColumnResult[] columns();
>>>>>> }
>>>>> One could think of EntityResult[] entities here as well. This would
>>>>> impose a restriction on the ordering of constructor parameters
>>>>> (entities either first or last), however, I think one could live with
>>>>> that. Unfortunately, annotations may not inherit from each other.
>>>
>>> Any opinion on the above ?
>> I think I would prefer to defer the issue pending any requests.
>
> Actually, my point here is that constructor expressions in JPQL allow
> for entities as arguments, and I would find it quite helpful for users
> if similar constructs would be defined with as similar functional range
> as possible throughout the spec. Users already have to face intricacies
> like e.g.
>
> Native SQL queries -> positional parameters
> Stored procedures -> positional and named parameters
> JPQL queries -> positional and named parameters
> Criteria queries -> named and unnamed parameters
>
> Wouldn't want to open up another one here as well...
>
> Best regards
> Rainer
>
> ---
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