Akka.Interfaced.NotificationHandlerBuilder.BuildHandler C# (CSharp) Method

        private static NotificationHandler BuildHandler(
            Type targetType, Type invokePayloadType, MethodInfo method, FilterChain filterChain)
        {
            var handler = RequestHandlerFuncBuilder.Build(targetType, invokePayloadType, null, method);

            return delegate(object self, NotificationMessage notification)
            {
                var filterPerInstanceProvider = filterChain.PerInstanceFilterExists ? (IFilterPerInstanceProvider)self : null;

                // Create PerRequest filters

                IFilter[] filterPerRequests = null;

                if (filterChain.PerInvokeFilterFactories.Length > 0)
                {
                    filterPerRequests = new IFilter[filterChain.PerInvokeFilterFactories.Length];
                    for (var i = 0; i < filterChain.PerInvokeFilterFactories.Length; i++)
                    {
                        filterPerRequests[i] = filterChain.PerInvokeFilterFactories[i].CreateInstance(self, notification);
                    }
                }

                // Call PreFilters

                var handled = false;
                if (filterChain.PreFilterAccessors.Length > 0)
                {
                    var context = new PreNotificationFilterContext
                    {
                        Actor = self,
                        Notification = notification
                    };
                    foreach (var filterAccessor in filterChain.PreFilterAccessors)
                    {
                        var filter = filterAccessor(filterPerInstanceProvider, filterPerRequests);
                        ((IPreNotificationFilter)filter).OnPreNotification(context);
                    }
                    handled = context.Handled;
                }

                // Call Handler

                if (handled == false)
                    handler(self, notification.InvokePayload);

                // Call PostFilters

                if (filterChain.PostFilterAccessors.Length > 0)
                {
                    var context = new PostNotificationFilterContext
                    {
                        Actor = self,
                        Notification = notification,
                        Intercepted = handled
                    };
                    foreach (var filterAccessor in filterChain.PostFilterAccessors)
                    {
                        var filter = filterAccessor(filterPerInstanceProvider, filterPerRequests);
                        ((IPostNotificationFilter)filter).OnPostNotification(context);
                    }
                }
            };
        }