Hi i m using this code:

internal void RunUpdatePredicateExpression(EntityBase2 entityToUpdate, IPredicate[] predicates) { IRelationPredicateBucket filter = new RelationPredicateBucket(); foreach (var item in predicates) { filter.PredicateExpression.AddWithAnd(item); } using (IDataAccessAdapter adapter = this.DataAccessAdapterProvider.GetAdapter()) { adapter.UpdateEntitiesDirectly(entityToUpdate, filter); } } now i want that the IPredicate be for specific entity on the declaration of the function. it prevent runtime error when i try to add Predicates which are not match the entityToUpdate. how can i manage it? thanks

Is there a particular reason why you need this generic a routine, and how would you get to a situation where it ends up being passed predicates that don't match the entities - surely whoever is calling this routine know what they are passing...?

Matt

that what I want to prevent on compile time that to the routine only get predicate that belongs to the specific entity type.

I think that is not possible, at lest I see that very complex. You see, a predicate can be very simple or very complex (expressions, expression into another, DBFunctionCalls, etc). So you can't just change the involved entity of a predicate.

In my opinion, this should be managed outside, I mean, the programmer should know that he can't pass a predicate that doesn't match some entity type.