| AclEntryImpl | This is a class that describes one entry that associates users or groups with permissions in the ACL. |
| AclImpl | An Access Control List (ACL) is encapsulated by this class. |
| AllPermissionsImpl | This class implements the principal interface for the set of all permissions. |
| GroupImpl | This class implements a group of principals. |
| OwnerImpl | Class implementing the Owner interface. |
| PermissionImpl | The PermissionImpl class implements the permission interface for permissions that are strings. |
| PrincipalImpl | This class implements the principal interface. |
| WorldGroupImpl | This class implements a group of principals. |