internal SPModelEventArgs(SPModelEventType eventType, SPModel model, ISPListItemAdapter previousAdapter, SPItemEventProperties properties)
{
CommonHelper.ConfirmNotNull(model, "model");
CommonHelper.ConfirmNotNull(properties, "properties");
this.properties = properties;
this.previousAdapter = previousAdapter;
this.manager = model.ParentCollection.Manager;
this.eventType = eventType;
}
protected void HandleEvent(SPItemEventProperties properties, SPModelEventType eventType)
{
using (new SPMonitoredScope(String.Format("SPModel Event Receiver ({0})", eventType))) {
try {
if (properties.AfterProperties != null && properties.BeforeProperties != null)
{
SPListItemCollection itemData = Interlocked.Exchange(ref previousItemData, null);
ISPListItemAdapter adapter;
ISPListItemAdapter previousAdapter;
if (eventType == SPModelEventType.Deleted)
{
adapter = new SPPreviousEventDataCollectionAdapter(properties, itemData);
previousAdapter = adapter;
}
else if (eventType == SPModelEventType.Adding || eventType == SPModelEventType.Updating || eventType == SPModelEventType.Deleting || eventType == SPModelEventType.Publishing)
{
adapter = new SPItemEventDataCollectionAdapter(properties);
previousAdapter = eventType == SPModelEventType.Adding ? null : new SPListItemAdapter(properties.ListItem);
}
else
{
adapter = new SPListItemAdapter(properties.ListItem);
previousAdapter = itemData != null ? new SPPreviousEventDataCollectionAdapter(properties, itemData) : adapter;
}
SPModel currentItem = SPModel.TryCreate(adapter);
if (currentItem != null)
{
currentItem.HandleEvent(new SPModelEventArgs(eventType, currentItem, previousAdapter, properties));
if (eventType == SPModelEventType.Updating || eventType == SPModelEventType.Deleting)
{
previousItemData = properties.ListItem.ListItems;
}
}
}
} catch (Exception ex) {
SPDiagnosticsService.Local.WriteTrace(TraceCategory.General, ex);
if (HostingEnvironment.IsHosted)
{
properties.Status = SPEventReceiverStatus.CancelWithError;
properties.ErrorMessage = ex.Message;
}
else
{
throw;
}
}
}
}
