Providing a Custom Permission Authority

Both read and write operations on the model are executed through an accessibility layer called the model accessor, implemented by org.eclipse.sirius.ecore.extender.business.api.accessor.ModelAccessor. Each session has an an associated ModelAccessor which can be obtained with Session.getModelAccessor().

The model accessor itself delegates the permission checking to an IPermissionAuthority , which is responsible for checking which operations are permitted on a given model element. The permission authority is also used to lock model elements (both representation and semantic elements), query their lock status and be notified (through IAuthorityListener) when a lock is taken or released.

You can provide a custom permission authority by implementing the interface org.eclipse.sirius.ecore.extender.business.api.permission.IPermissionAuthority and registering your custom implementation with the org.eclipse.sirius.ecore.extender.PermissionProvider extension point.