[This topic is pre-release documentation and is subject to change in future releases. Blank topics are included as placeholders.]

This view is a very simple view presenting the last event posted by the parent view to any subviews. Only the very last event object is kept by this view. The update method invoked by the parent view supplies new data in an object array, of which the view keeps the very last instance as the 'last' or newest event. The view always has the same schema as the parent view and attaches to anything, and accepts no parameters. Useful is the last view for example for "stocks.time_window(100).last()". Notice that "stocks.last().Count" and "stocks.win:length(10).std:lastevent().std:size()" must always return 0 or 1. Thus if 5 pieces of new data arrive, the child view receives 5 elements of new data and also 4 pieces of old data which is the first 4 elements of new data. I.e. New data elements immediatly gets to be old data elements. Old data received from parent is not handled, it is ignored. We thus post old data as follows: last event is not null + new data from index zero to N-1, where N is the index of the last element in new data

Namespace: net.esper.view.std
Assembly:   NEsper (in NEsper.dll)

Syntax

Visual Basic (Declaration)
Public Class LastElementView _
	Inherits ViewSupport
C#
public class LastElementView : ViewSupport
Visual C++
public ref class LastElementView : public ViewSupport

Inheritance Hierarchy

System.Object
  net.esper.view.ViewSupport
    net.esper.view.std.LastElementView