com.espertech.esper.epl.lookup

Class SubordInKeywordSingleTableLookupStrategy

java.lang.Object

com.espertech.esper.epl.lookup.SubordInKeywordSingleTableLookupStrategy

All Implemented Interfaces:

SubordTableLookupStrategy

public class SubordInKeywordSingleTableLookupStrategy
extends Object
implements SubordTableLookupStrategy

Index lookup strategy for subqueries.

Field Summary

Fields

Modifier and Type	Field and Description
protected ExprEvaluator[]	evaluators Stream numbers to get key values from.
protected PropertyIndexedEventTableSingle	index Index to look up in.

Constructor Summary

Constructors

Constructor and Description
SubordInKeywordSingleTableLookupStrategy(int streamCountOuter, ExprEvaluator[] evaluators, PropertyIndexedEventTableSingle index, LookupStrategyDesc strategyDesc)

Method Summary

Modifier and Type	Method and Description
PropertyIndexedEventTableSingle	getIndex() Returns index to look up in.
LookupStrategyDesc	getStrategyDesc()
Collection<EventBean>	lookup(EventBean[] eventsPerStream, ExprEvaluatorContext context) Returns matched events for a set of events to look up for.
String	toQueryPlan()

Methods inherited from class java.lang.Object

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

Field Detail

evaluators

protected final ExprEvaluator[] evaluators

Stream numbers to get key values from.

index

protected final PropertyIndexedEventTableSingle index

Index to look up in.

Constructor Detail

SubordInKeywordSingleTableLookupStrategy

public SubordInKeywordSingleTableLookupStrategy(int streamCountOuter,
                                                ExprEvaluator[] evaluators,
                                                PropertyIndexedEventTableSingle index,
                                                LookupStrategyDesc strategyDesc)

Method Detail

getIndex

public PropertyIndexedEventTableSingle getIndex()

Returns index to look up in.

Returns:

index to use

lookup

public Collection<EventBean> lookup(EventBean[] eventsPerStream,
                                    ExprEvaluatorContext context)

Description copied from interface: SubordTableLookupStrategy

Returns matched events for a set of events to look up for. Never returns an empty result set, always returns null to indicate no results.

Specified by:

lookup in interface SubordTableLookupStrategy

Parameters:

eventsPerStream - to look up

context - context

Returns:

set of matching events, or null if none matching

getStrategyDesc

public LookupStrategyDesc getStrategyDesc()

Specified by:

getStrategyDesc in interface SubordTableLookupStrategy

toQueryPlan

public String toQueryPlan()

Specified by:

toQueryPlan in interface SubordTableLookupStrategy