com.espertech.esper.epl.expression.core

Class ExprIdentNodeEvaluatorContext

java.lang.Object

com.espertech.esper.epl.expression.core.ExprIdentNodeEvaluatorContext

All Implemented Interfaces:

ExprEvaluator, ExprIdentNodeEvaluator

public class ExprIdentNodeEvaluatorContext
extends Object
implements ExprIdentNodeEvaluator

Constructor Summary

Constructors

Constructor and Description
ExprIdentNodeEvaluatorContext(int streamNum, Class resultType, EventPropertyGetterSPI getter)

Method Summary

Modifier and Type	Method and Description
CodegenExpression	codegen(CodegenParamSetExprPremade params, CodegenContext context)
Object	evaluate(EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext context) Evaluate event tuple and return result.
boolean	evaluatePropertyExists(EventBean[] eventsPerStream, boolean isNewData)
Class	getEvaluationType()
EventPropertyGetterSPI	getGetter()
int	getStreamNum()
boolean	isContextEvaluated()

Methods inherited from class java.lang.Object

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

Constructor Detail

ExprIdentNodeEvaluatorContext

public ExprIdentNodeEvaluatorContext(int streamNum,
                                     Class resultType,
                                     EventPropertyGetterSPI getter)

Method Detail

evaluatePropertyExists

public boolean evaluatePropertyExists(EventBean[] eventsPerStream,
                                      boolean isNewData)

Specified by:

evaluatePropertyExists in interface ExprIdentNodeEvaluator

getStreamNum

public int getStreamNum()

Specified by:

getStreamNum in interface ExprIdentNodeEvaluator

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.

codegen

public CodegenExpression codegen(CodegenParamSetExprPremade params,
                                 CodegenContext context)

Specified by:

codegen in interface ExprIdentNodeEvaluator

getEvaluationType

public Class getEvaluationType()

Specified by:

getEvaluationType in interface ExprIdentNodeEvaluator

getGetter

public EventPropertyGetterSPI getGetter()

Specified by:

getGetter in interface ExprIdentNodeEvaluator

isContextEvaluated

public boolean isContextEvaluated()

Specified by:

isContextEvaluated in interface ExprIdentNodeEvaluator