com.espertech.esper.epl.expression.prior
Class ExprPriorEvalStrategyBase

java.lang.Object
  com.espertech.esper.epl.expression.prior.ExprPriorEvalStrategyBase

All Implemented Interfaces:

ExprPriorEvalStrategy

Direct Known Subclasses:

ExprPriorEvalStrategyRandomAccess, ExprPriorEvalStrategyRelativeAccess

public abstract class ExprPriorEvalStrategyBase
extends java.lang.Object
implements ExprPriorEvalStrategy

Represents the 'prior' prior event function in an expression node tree.

Constructor Summary

ExprPriorEvalStrategyBase()

Method Summary

java.lang.Object	evaluate(EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext exprEvaluatorContext, int streamNumber, ExprEvaluator evaluator, int constantIndexNumber)
abstract EventBean	getSubstituteEvent(EventBean originalEvent, boolean isNewData, int constantIndexNumber)

Methods inherited from class java.lang.Object

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

Constructor Detail

ExprPriorEvalStrategyBase

public ExprPriorEvalStrategyBase()

Method Detail

getSubstituteEvent

public abstract EventBean getSubstituteEvent(EventBean originalEvent,
                                             boolean isNewData,
                                             int constantIndexNumber)

evaluate

public java.lang.Object evaluate(EventBean[] eventsPerStream,
                                 boolean isNewData,
                                 ExprEvaluatorContext exprEvaluatorContext,
                                 int streamNumber,
                                 ExprEvaluator evaluator,
                                 int constantIndexNumber)

Specified by:

evaluate in interface ExprPriorEvalStrategy