com.espertech.esper.epl.core.select.eval

Class EvalBaseFirstProp

java.lang.Object

com.espertech.esper.epl.core.select.eval.EvalBaseFirstProp

All Implemented Interfaces:

SelectExprProcessor, SelectExprProcessorForge

Direct Known Subclasses:

EvalBaseFirstPropFromWrap, EvalInsertNoWildcardSingleColCoercionBean, EvalInsertNoWildcardSingleColCoercionBeanWrapVariant, EvalInsertNoWildcardSingleColCoercionRevisionBean, EvalInsertNoWildcardSingleColCoercionRevisionFunc

public abstract class EvalBaseFirstProp
extends java.lang.Object
implements SelectExprProcessor, SelectExprProcessorForge

Constructor Summary

Constructors

Constructor and Description
EvalBaseFirstProp(SelectExprForgeContext selectExprForgeContext, EventType resultEventType)

Method Summary

Modifier and Type	Method and Description
EventAdapterService	getEventAdapterService()
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)
protected abstract EventBean	processFirstCol(java.lang.Object result)
protected abstract CodegenExpression	processFirstColCodegen(java.lang.Class evaluationType, CodegenExpression expression, CodegenMember memberResultEventType, CodegenMember memberEventAdapterService, CodegenMethodScope codegenMethodScope, CodegenClassScope codegenClassScope)

Methods inherited from class java.lang.Object

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

Constructor Detail

EvalBaseFirstProp

public EvalBaseFirstProp(SelectExprForgeContext selectExprForgeContext,
                         EventType resultEventType)

Method Detail

processFirstCol

protected abstract EventBean processFirstCol(java.lang.Object result)

processFirstColCodegen

protected abstract CodegenExpression processFirstColCodegen(java.lang.Class evaluationType,
                                                            CodegenExpression expression,
                                                            CodegenMember memberResultEventType,
                                                            CodegenMember memberEventAdapterService,
                                                            CodegenMethodScope codegenMethodScope,
                                                            CodegenClassScope codegenClassScope)

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

processCodegen

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

Specified by:

processCodegen in interface SelectExprProcessorForge

getEventAdapterService

public EventAdapterService getEventAdapterService()

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