com.espertech.esper.epl.core.select

Class SelectExprWildcardProcessor

java.lang.Object

com.espertech.esper.epl.core.select.SelectExprWildcardProcessor

All Implemented Interfaces:

SelectExprProcessor, SelectExprProcessorForge

public class SelectExprWildcardProcessor
extends java.lang.Object
implements SelectExprProcessor, SelectExprProcessorForge

Processor for select-clause expressions that handles wildcards for single streams with no insert-into.

Constructor Summary

Constructors

Constructor and Description
SelectExprWildcardProcessor(EventType eventType) Ctor.

Method Summary

Modifier and Type	Method and Description
EventType	getResultEventType() Returns the event type that represents the select-clause items.
SelectExprProcessor	getSelectExprProcessor(EngineImportService engineImportService, boolean isFireAndForget, java.lang.String statementName)
EventBean	process(EventBean[] eventsPerStream, boolean isNewData, boolean isSynthesize, ExprEvaluatorContext exprEvaluatorContext) Computes the select-clause results and returns an event of the result event type that contains, in it's properties, the selected items.
CodegenMethodNode	processCodegen(CodegenMember memberResultEventType, CodegenMember memberEventAdapterService, CodegenMethodScope codegenMethodScope, SelectExprProcessorCodegenSymbol selectSymbol, ExprForgeCodegenSymbol exprSymbol, CodegenClassScope codegenClassScope)

Methods inherited from class java.lang.Object

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

Constructor Detail

SelectExprWildcardProcessor

public SelectExprWildcardProcessor(EventType eventType)
                            throws ExprValidationException

Ctor.

Parameters:

eventType - is the type of event this processor produces

Throws:

ExprValidationException - if the expression validation failed

Method Detail

process

public EventBean process(EventBean[] eventsPerStream,
                         boolean isNewData,
                         boolean isSynthesize,
                         ExprEvaluatorContext exprEvaluatorContext)

Description copied from interface: SelectExprProcessor

Computes the select-clause results and returns an event of the result event type that contains, in it's properties, the selected items.

Specified by:

process in interface SelectExprProcessor

Parameters:

eventsPerStream - - is per stream the event

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

isSynthesize - - set to true to indicate that synthetic events are required for an iterator result set

exprEvaluatorContext - context

Returns:

event with properties containing selected items

getResultEventType

public EventType getResultEventType()

Description copied from interface: SelectExprProcessorForge

Returns the event type that represents the select-clause items.

Specified by:

getResultEventType in interface SelectExprProcessorForge

Returns:

event type representing select-clause items

getSelectExprProcessor

public SelectExprProcessor getSelectExprProcessor(EngineImportService engineImportService,
                                                  boolean isFireAndForget,
                                                  java.lang.String statementName)

Specified by:

getSelectExprProcessor in interface SelectExprProcessorForge

processCodegen

public CodegenMethodNode processCodegen(CodegenMember memberResultEventType,
                                        CodegenMember memberEventAdapterService,
                                        CodegenMethodScope codegenMethodScope,
                                        SelectExprProcessorCodegenSymbol selectSymbol,
                                        ExprForgeCodegenSymbol exprSymbol,
                                        CodegenClassScope codegenClassScope)

Specified by:

processCodegen in interface SelectExprProcessorForge