com.espertech.esper.epl.core

Class SelectExprProcessorEvalByGetter

java.lang.Object

com.espertech.esper.epl.core.SelectExprProcessorEvalByGetter

All Implemented Interfaces:

ExprEvaluator, ExprForge, ExprNodeRenderable

public class SelectExprProcessorEvalByGetter
extends Object
implements ExprForge, ExprEvaluator, ExprNodeRenderable

Constructor Summary

Constructors

Constructor and Description
SelectExprProcessorEvalByGetter(int streamNum, EventPropertyGetterSPI getter, Class returnType)

Method Summary

Modifier and Type	Method and Description
Object	evaluate(EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext exprEvaluatorContext) Evaluate event tuple and return result.
CodegenExpression	evaluateCodegen(CodegenParamSetExprPremade params, CodegenContext context)
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

SelectExprProcessorEvalByGetter

public SelectExprProcessorEvalByGetter(int streamNum,
                                       EventPropertyGetterSPI getter,
                                       Class returnType)

Method Detail

evaluate

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

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)

exprEvaluatorContext - context for expression evaluation

Returns:

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

getComplexity

public ExprForgeComplexityEnum getComplexity()

Specified by:

getComplexity in interface ExprForge

getExprEvaluator

public ExprEvaluator getExprEvaluator()

Specified by:

getExprEvaluator in interface ExprForge

evaluateCodegen

public CodegenExpression evaluateCodegen(CodegenParamSetExprPremade params,
                                         CodegenContext context)

Specified by:

evaluateCodegen 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