com.espertech.esper.view

Interface DerivedValueView

All Superinterfaces:

EventCollection, GroupableView, Iterable<EventBean>, View, Viewable

All Known Implementing Classes:

BaseBivariateStatisticsView, CorrelationView, RegressionLinestView, UnivariateStatisticsView, WeightedAverageView

public interface DerivedValueView
extends View, GroupableView

Tag interface for derived-value views. Derived-value views follow the view interface and do not keep a window over the data received by their parent view. They simply derive a set of data points from a stream and do not retain events.

Derived-Value views generally follow the following behavior:

They publish the output data when receiving insert or remove stream data from their parent view, directly and not time-driven.

They typically change event type compared to their parent view, since they derive new information or add information to events.

Method Summary

Methods inherited from interface com.espertech.esper.view.View

getParent, setParent, update

Methods inherited from interface com.espertech.esper.view.Viewable

addView, getViews, hasViews, removeAllViews, removeView

Methods inherited from interface com.espertech.esper.view.EventCollection

getEventType, iterator

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Methods inherited from interface com.espertech.esper.view.GroupableView

getViewFactory