Gabriel is a security framework to restrict actions of users.
Think about EJB security but without EJB.
Gabriel is a security framework for Java. By using access control lists and permissions, Gabriel enables components to check access to actions. On top of that Gabriel protects methods like EJB does but without the overhead. It distinguishes itself from other frameworks by the ease of use with a small API and by mapping method access to permissions instead of persons. This way the same permissions can be used to protect method access and to check which GUI elements to show based on user permissions.
The Security Annotation Framework (SAF) is an instance-level access control framework driven by Java 5 annotations. It can be easily integrated into Spring applications which primarily use the SAF to control access to their domain object instances. SAF security annotations define locations in the source code where the SAF shall perform permission checks at runtime. An annotation-driven approach to instance-level access control promotes the separation of an application’s security logic from its business logic. This significantly increases the testability and reusability of application components. It further allows the implementation of instance-level access control features into existing applications without modifying existing business logic.