[news.eclipse.rt.eclipselink] Calculations of field values using other t

[Philipp Kursawe <phil.kursawe@xxxxxxxxx>]

Hello,

is it possible to calculate a fields value using a SQL statement?
I have a progress and a status field that would have to be calculated by 
values from another table.

OrderEntity {
  float progress;
  int shortageLines;
}

The shortageLines field would be calculated by the number of line items 
from the line_items table that have been picked with a shortage. The 
progress field is the overal % of already picked line items versus the 
total number of line items to pick.

Any idea if something like that is possible to "inject" into the object 
using JPA?

Thanks,
Phil