com.espertech.esper.epl.lookup

Class SubordInKeywordMultiTableLookupStrategy

java.lang.Object

com.espertech.esper.epl.lookup.SubordInKeywordMultiTableLookupStrategy

All Implemented Interfaces:

SubordTableLookupStrategy

public class SubordInKeywordMultiTableLookupStrategy
extends Object
implements SubordTableLookupStrategy

Index lookup strategy for subqueries.

Field Summary

Fields

Modifier and Type	Field and Description
protected ExprEvaluator	evaluator
protected PropertyIndexedEventTableSingle[]	indexes Index to look up in.

Constructor Summary

Constructors

Constructor and Description
SubordInKeywordMultiTableLookupStrategy(int numStreamsOuter, ExprEvaluator evaluator, EventTable[] tables, LookupStrategyDesc strategyDesc)

Method Summary

Modifier and Type	Method and Description
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

indexes

protected final PropertyIndexedEventTableSingle[] indexes

Index to look up in.

evaluator

protected final ExprEvaluator evaluator

Constructor Detail

SubordInKeywordMultiTableLookupStrategy

public SubordInKeywordMultiTableLookupStrategy(int numStreamsOuter,
                                               ExprEvaluator evaluator,
                                               EventTable[] tables,
                                               LookupStrategyDesc strategyDesc)

Method Detail

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