com.espertech.esper.client.hook
Interface VirtualDataWindowLookup


public interface VirtualDataWindowLookup

Represents a lookup strategy object that an EPL statement that queries a virtual data window obtains to perform read operations into the virtual data window.

An instance is associated to each EPL statement querying (join, subquery, on-action etc.) the virtual data window.


Method Summary
 java.util.Set<EventBean> lookup(java.lang.Object[] keys, EventBean[] eventsPerStream)
          Invoked by an EPL statement that queries a virtual data window to perform a lookup.
 

Method Detail

lookup

java.util.Set<EventBean> lookup(java.lang.Object[] keys,
                                EventBean[] eventsPerStream)
Invoked by an EPL statement that queries a virtual data window to perform a lookup.

Keys passed are the actual query lookup values.

Parameters:
keys - lookup values
eventsPerStream - input events for the lookup
Returns:
set of events

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