Spotted on the Acegi Security mailing list several weeks ago:
A few weeks ago, I started an open source project (Security Annotation Framework) which addresses annotation-based, instance-level access control for Spring applications. It is also based on Spring 2.0's extensible XML authoring features. You can find more info at
http://sourceforge.net/projects/safr and http://safr.sourceforge.net
The framework was created during a project in 2006 and is now available under the Apache 2.0 license. It's a generic framework focused on processing security annotations on Spring beans as well as domain objects (which typically aren't managed by a Spring application context) and can be used to enforce access decisions for domain object instances. It can be used with any authorization provider and is not specific to Acegi. However, I plan to include an example how to use the SAF with Acegi authorization soon. Furthermore, it supports inheritance of annotations from base classes and interfaces.
What do you think about SAF? Are annotations a better way of implementing ACLs on domain objects?