Package com.espertech.esper.common.internal.epl.expression.etc

Class ExprEvalStreamTable

java.lang.Object

com.espertech.esper.common.internal.epl.expression.etc.ExprEvalStreamTable

All Implemented Interfaces:

ExprEvaluator, ExprForge, ExprNodeRenderable

public class ExprEvalStreamTable
extends Object
implements ExprForge, ExprEvaluator, ExprNodeRenderable

Field Summary

Fields inherited from interface com.espertech.esper.common.internal.epl.expression.core.ExprEvaluator

EPTYPE, EPTYPEARRAY

Constructor Summary

Constructors

Constructor	Description
ExprEvalStreamTable(int streamNum, EPTypeClass returnType, TableMetaData tableMetadata)

Method Summary

Modifier and Type	Method	Description
Object	evaluate(EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext exprEvaluatorContext)	Evaluate event tuple and return result.
CodegenExpression	evaluateCodegen(EPTypeClass requiredType, CodegenMethodScope codegenMethodScope, ExprForgeCodegenSymbol exprSymbol, CodegenClassScope codegenClassScope)
static Object[]	evaluateConvertTableEventToUnd(int streamNum, TableMetadataInternalEventToPublic eventToPublic, EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext context)	NOTE: Code-generation-invoked method, method name and parameter order matters
EPTypeClass	getEvaluationType()
ExprEvaluator	getExprEvaluator()
ExprForgeConstantType	getForgeConstantType()
ExprNodeRenderable	getForgeRenderable()
void	toEPL(StringWriter writer, ExprPrecedenceEnum parentPrecedence, ExprNodeRenderableFlags flags)

Methods inherited from class java.lang.Object

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

Constructor Details

ExprEvalStreamTable

public ExprEvalStreamTable(int streamNum,
 EPTypeClass returnType,
 TableMetaData tableMetadata)

Method Details

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.

evaluateCodegen

public CodegenExpression evaluateCodegen(EPTypeClass requiredType,
 CodegenMethodScope codegenMethodScope,
 ExprForgeCodegenSymbol exprSymbol,
 CodegenClassScope codegenClassScope)

Specified by:

evaluateCodegen in interface ExprForge

evaluateConvertTableEventToUnd

public static Object[] evaluateConvertTableEventToUnd(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 EPTypeClass 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,
 ExprNodeRenderableFlags flags)

Specified by:

toEPL in interface ExprNodeRenderable

getForgeConstantType

public ExprForgeConstantType getForgeConstantType()

Specified by:

getForgeConstantType in interface ExprForge