com.espertech.esper.epl.core
Class SelectExprProcessorWDeliveryCallback

java.lang.Object
  com.espertech.esper.epl.core.SelectExprProcessorWDeliveryCallback

All Implemented Interfaces:

SelectExprProcessor

public class SelectExprProcessorWDeliveryCallback
extends java.lang.Object
implements SelectExprProcessor

Interface for processors of select-clause items, implementors are computing results based on matching events.

Constructor Summary

SelectExprProcessorWDeliveryCallback(EventType eventType, BindProcessor bindProcessor, SelectExprProcessorDeliveryCallback selectExprProcessorCallback)

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

SelectExprProcessorWDeliveryCallback

public SelectExprProcessorWDeliveryCallback(EventType eventType,
                                            BindProcessor bindProcessor,
                                            SelectExprProcessorDeliveryCallback selectExprProcessorCallback)

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