Hibernate Collection is set to cascade = "all-delete-orphan".
Out of the objects in the collection some of them need to be updated and some will get deleted.
Hibernate is firing update of the objects first before delete.
Because of the update getting fired first some of the integrity constraints are failing as update is expecting the deleted objects not to be there.

Is there anyway that we can make hibernate fire deletes first and then updates in the the batch process for collections.