/// <summary>
/// OnInitializeCollection fires on the initialization of any NHibernate collection proxy.
/// If security is enabled and the collection contains secured entities, the collection
/// will be modified such that it will only contain entities that the current security user
/// is allowed to see.
/// </summary>
/// <param name="event"></param>
public void OnInitializeCollection(InitializeCollectionEvent @event)
{
// Skip processing if there is nothing to do
if (null == @event.Collection || @event.Collection.Empty || [email protected]())
{
return;
}
// As data access library implementer, I know that secured child entities are all contained in
// generic lists (i.e. not Set or Map)
var collectionType = @event.Collection.GetType();
if (collectionType.IsGenericType)
{
var gtype = collectionType.GetGenericArguments().First(); // This breaks on Dictionary
if (gtype.IsSecurable())
{
var entityName = @event.Session.GetFilterParameterValue("EntityNameFilter.EntityName") as string;
// After checking NHibernate source, the persistent list and bag collections all implement the
// non-generic ILIst definition.
var values = (System.Collections.IList)@event.Collection.GetValue();
var securables = values.Cast<ISecurable>(); // This should be safe due to implementation check above
//
var keepers = securables.ToList().FindAll(x => x.IsLoadableFor(entityName));
values.Clear();
keepers.ForEach(x => values.Add(x));
}
}
}
public override void OnInitializeCollection(InitializeCollectionEvent @event)
{
base.OnInitializeCollection(@event);
AddEvent(@event, this);
}
public void OnInitializeCollection(InitializeCollectionEvent @event)
{
log.Debug("OnInitializeCollection :" + @event);
}
