com.espertech.esper.epl.core.eval
Class EvalSelectStreamWUnderlyingRecastMap

java.lang.Object
  extended by com.espertech.esper.epl.core.eval.EvalSelectStreamWUnderlyingRecastMap
All Implemented Interfaces:
SelectExprProcessor

public class EvalSelectStreamWUnderlyingRecastMap
extends java.lang.Object
implements SelectExprProcessor


Constructor Summary
EvalSelectStreamWUnderlyingRecastMap(SelectExprContext selectExprContext, int underlyingStreamNumber, EventType resultType)
           
 
Method Summary
 EventType getResultEventType()
          Returns the event type that represents the select-clause items.
 EventBean process(EventBean[] eventsPerStream, boolean isNewData, boolean isSynthesize, ExprEvaluatorContext exprEvaluatorContext)
          Computes the select-clause results and returns an event of the result event type that contains, in it's properties, the selected items.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

EvalSelectStreamWUnderlyingRecastMap

public EvalSelectStreamWUnderlyingRecastMap(SelectExprContext selectExprContext,
                                            int underlyingStreamNumber,
                                            EventType resultType)
Method Detail

getResultEventType

public EventType getResultEventType()
Description copied from interface: SelectExprProcessor
Returns the event type that represents the select-clause items.

Specified by:
getResultEventType in interface SelectExprProcessor
Returns:
event type representing select-clause items

process

public EventBean process(EventBean[] eventsPerStream,
                         boolean isNewData,
                         boolean isSynthesize,
                         ExprEvaluatorContext exprEvaluatorContext)
Description copied from interface: SelectExprProcessor
Computes the select-clause results and returns an event of the result event type that contains, in it's properties, the selected items.

Specified by:
process in interface SelectExprProcessor
Parameters:
eventsPerStream - - is per stream the event
isNewData - - indicates whether we are dealing with new data (istream) or old data (rstream)
isSynthesize - - set to true to indicate that synthetic events are required for an iterator result set
Returns:
event with properties containing selected items

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