public override EventDescriptorCollection GetEvents(Attribute[] attributes)
{
var sourceEvents = base.GetEvents(attributes);
if ((sourceEvents == null) || (sourceEvents.Count == 0))
{
return(sourceEvents);
}
var entry = this.GetEntry();
var replaceEvents = default(Dictionary <EventDescriptor, DataItemEventDescriptorBase>);
lock ( entry )
{
replaceEvents = entry.Events;
if (replaceEvents == null)
{
replaceEvents = new Dictionary <EventDescriptor, DataItemEventDescriptorBase>();
entry.Events = replaceEvents;
var factory = new DataItemEventDescriptorFactory(this);
foreach (var sourceEvent in sourceEvents.Cast <EventDescriptor>())
{
var descriptor = factory.CreateEventDescriptor(sourceEvent);
if (descriptor != null)
{
replaceEvents.Add(sourceEvent, descriptor);
}
}
}
if (replaceEvents.Count == 0)
{
return(sourceEvents);
}
}
var destinationEvents = new EventDescriptor[sourceEvents.Count];
for (int i = 0; i < sourceEvents.Count; i++)
{
var sourceEvent = sourceEvents[i];
DataItemEventDescriptorBase destinationEvent;
if (replaceEvents.TryGetValue(sourceEvent, out destinationEvent))
{
destinationEvents[i] = destinationEvent;
}
else
{
destinationEvents[i] = sourceEvent;
}
}
return(new EventDescriptorCollection(destinationEvents));
}
internal DataItemEventDescriptor CreateEventDescriptor(EventDescriptor source)
{
if (!DataItemEventDescriptorFactory.IsReflected(source))
{
return(null);
}
var componentType = source.ComponentType;
EventInfo eventInfo;
try
{
eventInfo = componentType.GetEvent(source.Name, BindingFlags.Public | BindingFlags.Instance);
if (eventInfo == null)
{
return(null);
}
}
catch (AmbiguousMatchException)
{
return(null);
}
var handlerType = eventInfo.EventHandlerType;
Debug.Assert(handlerType == source.EventType);
var creatorHelper = DelegateCreatorHelperFactory.CreateHelper(componentType, handlerType);
var addHandler = DataItemEventDescriptorFactory.CreateAddHandler(eventInfo, creatorHelper);
if (addHandler == null)
{
return(null);
}
var removeHandler = DataItemEventDescriptorFactory.CreateRemoveHandler(eventInfo, creatorHelper);
if (removeHandler == null)
{
return(null);
}
return(new DataItemEventDescriptor(m_typeDescriptor, source, componentType, handlerType, addHandler, removeHandler));
}
