static void eventRegistry_Validate(object sender, CancellableObjectEventArgs args)
{
ObjectValidator ovr = GetObjectValidator(args.Object);
bool isValid = ovr.IsValid(args.Object);
if (!isValid)
{
args.Cancel();
ovr.Validate(args.Object);
}
}
public void OnEvent(object sender, Db4objects.Db4o.Events.CancellableObjectEventArgs
args)
{
CancellableObjectEventArgs cancellable = (CancellableObjectEventArgs)args;
if (cancellable.Object is Page)
{
Page page = (Page)cancellable.Object;
if (!page.IsDirty())
{
cancellable.Cancel();
}
}
}
// #example: Referential integrity
private static void ReferentialIntegrityCheck(object sender,
CancellableObjectEventArgs eventArguments)
{
object toDelete = eventArguments.Object;
if (toDelete is Pilot)
{
IObjectContainer container = eventArguments.ObjectContainer();
IEnumerable <Car> cars = from Car c in container
where c.Pilot == toDelete
select c;
if (cars.Count() > 0)
{
eventArguments.Cancel();
}
}
}
void OnCreating(object sender, CancellableObjectEventArgs args)
{
_events.Add("Creating");
Assert.IsFalse(args.IsCancelled);
args.Cancel();
}