com.espertech.esper.epl.join.pollindex
Class PollResultIndexingStrategyIndexCoerceSingle

java.lang.Object
  com.espertech.esper.epl.join.pollindex.PollResultIndexingStrategyIndexCoerceSingle

All Implemented Interfaces:

PollResultIndexingStrategy

public class PollResultIndexingStrategyIndexCoerceSingle
extends java.lang.Object
implements PollResultIndexingStrategy

Strategy for building an index out of poll-results knowing the properties to base the index on, and their coercion types.

Constructor Summary

PollResultIndexingStrategyIndexCoerceSingle(int streamNum, EventType eventType, java.lang.String propertyName, java.lang.Class coercionType)
Ctor.

Method Summary

EventTable[]	index(java.util.List<EventBean> pollResult, boolean isActiveCache) Build and index of a poll result.
java.lang.String	toQueryPlan()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

PollResultIndexingStrategyIndexCoerceSingle

public PollResultIndexingStrategyIndexCoerceSingle(int streamNum,
                                                   EventType eventType,
                                                   java.lang.String propertyName,
                                                   java.lang.Class coercionType)

Ctor.

Parameters:

streamNum - is the stream number of the indexed stream

eventType - is the event type of the indexed stream

Method Detail

index

public EventTable[] index(java.util.List<EventBean> pollResult,
                          boolean isActiveCache)

Description copied from interface: PollResultIndexingStrategy

Build and index of a poll result.

Specified by:

index in interface PollResultIndexingStrategy

Parameters:

pollResult - result of a poll operation

isActiveCache - true to indicate that caching is active and therefore index building makes sense as the index structure is not a throw-away.

Returns:

indexed collection of poll results

toQueryPlan

public java.lang.String toQueryPlan()

Specified by:

toQueryPlan in interface PollResultIndexingStrategy