Dynamic instantiation with null value

ldelaforge · **Joined:** Thu Feb 19, 2009 9:34 am **Posts:** 4

Hi everyone,

Is it possible to use dynamic instantiation with null value in HQL ?
Something like this :

Code:

select new ArticleAggregation(null, article.name, null, sum(article.value))
from article
group by article.quantity, article.name, article.description

Thank you

mmerder · **Posted:** Thu Feb 19, 2009 10:04 am

No, I guess its not possible, as hibernate cannot determine the appropriate constructor.

ldelaforge · **Joined:** Thu Feb 19, 2009 9:34 am **Posts:** 4

mmerder wrote:

No, I guess its not possible, as hibernate cannot determine the appropriate constructor.

Thank you for your answer.
But it could be resolved by a cast mechanism... If it was ever implemented...

mmerder · **Posted:** Thu Feb 19, 2009 12:05 pm

Or by another constructor, if you can add one. ;-)

ldelaforge · **Joined:** Thu Feb 19, 2009 9:34 am **Posts:** 4

It is not a good solution for me, because my HQL request is generated dynamically.
So I would have to implement all potential constructors.
Which is not possible because some parameters are in the same type...

In my Example :

Code:

ArticleAggregation(String name, Long quantity)
ArticleAggregation(String description, Long quantity)