com.espertech.esper.epl.core.eval

Class EvalBaseMap

java.lang.Object

com.espertech.esper.epl.core.eval.EvalBase

com.espertech.esper.epl.core.eval.EvalBaseMap

All Implemented Interfaces:

SelectExprProcessor

Direct Known Subclasses:

EvalInsertNoWildcardMap, EvalInsertNoWildcardRevision, EvalInsertWildcardJoin, EvalInsertWildcardRevisionWrapper, EvalInsertWildcardSSWrapper, EvalInsertWildcardSSWrapperRevision, EvalInsertWildcardWrapper, EvalSelectWildcard, EvalSelectWildcardJoin, EvalSelectWildcardSSWrapper

public abstract class EvalBaseMap
extends EvalBase
implements SelectExprProcessor

Field Summary

Fields inherited from class com.espertech.esper.epl.core.eval.EvalBase

resultEventType, selectExprContext

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	EvalBaseMap(SelectExprContext selectExprContext, EventType resultEventType)

Method Summary

Modifier and Type	Method and Description
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.
abstract EventBean	processSpecific(Map<String,Object> props, EventBean[] eventsPerStream, boolean isNewData, boolean isSynthesize, ExprEvaluatorContext exprEvaluatorContext)

Methods inherited from class com.espertech.esper.epl.core.eval.EvalBase

getEventAdapterService, getExprNodes, getResultEventType

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.espertech.esper.epl.core.SelectExprProcessor

getResultEventType

Constructor Detail

EvalBaseMap

protected EvalBaseMap(SelectExprContext selectExprContext,
                      EventType resultEventType)

Method Detail

processSpecific

public abstract EventBean processSpecific(Map<String,Object> props,
                                          EventBean[] eventsPerStream,
                                          boolean isNewData,
                                          boolean isSynthesize,
                                          ExprEvaluatorContext exprEvaluatorContext)

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