com.espertech.esper.epl.expression.core

Class ExprNodeUtilExprStreamNumEventTable

java.lang.Object

com.espertech.esper.epl.expression.core.ExprNodeUtilExprStreamNumEventTable

All Implemented Interfaces:

ExprEvaluator, ExprForge, ExprNodeRenderable

public class ExprNodeUtilExprStreamNumEventTable
extends Object
implements ExprForge, ExprEvaluator, ExprNodeRenderable

Constructor Summary

Constructors

Constructor and Description
ExprNodeUtilExprStreamNumEventTable(int streamNum, TableMetadata tableMetadata)

Method Summary

Modifier and Type	Method and Description
Object	evaluate(EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext context) Evaluate event tuple and return result.
CodegenExpression	evaluateCodegen(CodegenParamSetExprPremade params, CodegenContext context)
static EventBean	evaluateConvertTableEvent(int streamNum, TableMetadataInternalEventToPublic eventToPublic, EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext context) NOTE: Code-generation-invoked method, method name and parameter order matters
ExprForgeComplexityEnum	getComplexity()
Class	getEvaluationType()
ExprEvaluator	getExprEvaluator()
ExprNodeRenderable	getForgeRenderable()
void	toEPL(StringWriter writer, ExprPrecedenceEnum parentPrecedence)

Methods inherited from class java.lang.Object

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

Constructor Detail

ExprNodeUtilExprStreamNumEventTable

public ExprNodeUtilExprStreamNumEventTable(int streamNum,
                                           TableMetadata tableMetadata)

Method Detail

evaluate

public Object evaluate(EventBean[] eventsPerStream,
                       boolean isNewData,
                       ExprEvaluatorContext context)

Description copied from interface: ExprEvaluator

Evaluate event tuple and return result.

Specified by:

evaluate in interface ExprEvaluator

Parameters:

eventsPerStream - - event tuple

isNewData - - indicates whether we are dealing with new data (istream) or old data (rstream)

context - context for expression evaluation

Returns:

evaluation result, a boolean value for OR/AND-type evalution nodes.

evaluateCodegen

public CodegenExpression evaluateCodegen(CodegenParamSetExprPremade params,
                                         CodegenContext context)

Specified by:

evaluateCodegen in interface ExprForge

getComplexity

public ExprForgeComplexityEnum getComplexity()

Specified by:

getComplexity in interface ExprForge

evaluateConvertTableEvent

public static EventBean evaluateConvertTableEvent(int streamNum,
                                                  TableMetadataInternalEventToPublic eventToPublic,
                                                  EventBean[] eventsPerStream,
                                                  boolean isNewData,
                                                  ExprEvaluatorContext context)

NOTE: Code-generation-invoked method, method name and parameter order matters

Parameters:

streamNum - stream

eventToPublic - conversion

eventsPerStream - events

isNewData - flag

context - context

Returns:

event

getExprEvaluator

public ExprEvaluator getExprEvaluator()

Specified by:

getExprEvaluator in interface ExprForge

getEvaluationType

public Class getEvaluationType()

Specified by:

getEvaluationType in interface ExprForge

getForgeRenderable

public ExprNodeRenderable getForgeRenderable()

Specified by:

getForgeRenderable in interface ExprForge

toEPL

public void toEPL(StringWriter writer,
                  ExprPrecedenceEnum parentPrecedence)

Specified by:

toEPL in interface ExprNodeRenderable