SonataAdminBundle, filtering by function result

In my Symfony project I'm using SonataAdminBundle. And I got a question: For example I have some entity with a function:

class Entity {
protected $id;

public idBiggerThan($value) {
     return $id > $value;
}

And I want to create a filter that filters list by the result of this function (for example to be able choose only entities that have id bigger that current user).

I understand that this filter can be written without using this function, but I have much more complex functions, for which I don't want to write queries.

Thanks for your help.