Each layer contains out of 2 classes and 2 interfaces for it. One class contains the logic and the other class contains the service. This makes the classes easier testable and mockable and follows the SOLID Design Principles.

Entity

A requested entity contains the attributes to manage the entity which should be handled by an action

Right

This is the basic request layer from which the other layers inhiere. A requested right contains a requested entity.

User

A requested user is a parent of requested action and contains out of one requested right.

Action

A requested action inhieres from requested user and contains a requested user.

UML Class Diagram

The following diagram shows the relations between the different request layers and services: