dao class

void boolean saveOrUpdateUser (user, actor){ // actor is the person doing the action
    boolean b = checkIfUserCanSaveOrUpdate(actor);
    if (b){
     return true
    }else{
        return false  //// well I wanted to return a USer object in case of succes. how to do that?
    }

}

checkIfUserCanSaveOrUpdate(actor){
    //dbquery here to check for priviliegs
}