com.espertech.esper.epl.join.exec.base

Class FullTableScanLookupStrategy

java.lang.Object

com.espertech.esper.epl.join.exec.base.FullTableScanLookupStrategy

All Implemented Interfaces:

JoinExecTableLookupStrategy

public class FullTableScanLookupStrategy
extends Object
implements JoinExecTableLookupStrategy

Lookup on an unindexed table returning the full table as matching events.

Constructor Summary

Constructors

Constructor and Description
FullTableScanLookupStrategy(UnindexedEventTable eventIndex) Ctor.

Method Summary

Modifier and Type	Method and Description
UnindexedEventTable	getEventIndex() Returns the associated table.
LookupStrategyDesc	getStrategyDesc()
Set<EventBean>	lookup(EventBean theEvent, Cursor cursor, ExprEvaluatorContext exprEvaluatorContext) Returns matched events for a event to look up for.

Methods inherited from class java.lang.Object

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

Constructor Detail

FullTableScanLookupStrategy

public FullTableScanLookupStrategy(UnindexedEventTable eventIndex)

Ctor.

Parameters:

eventIndex - - table to use

Method Detail

lookup

public Set<EventBean> lookup(EventBean theEvent,
                             Cursor cursor,
                             ExprEvaluatorContext exprEvaluatorContext)

Description copied from interface: JoinExecTableLookupStrategy

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

Specified by:

lookup in interface JoinExecTableLookupStrategy

Parameters:

theEvent - to look up

cursor - the path in the query that the lookup took

exprEvaluatorContext - expression evaluation context

Returns:

set of matching events, or null if none matching

getEventIndex

public UnindexedEventTable getEventIndex()

Returns the associated table.

Returns:

table for lookup.

getStrategyDesc

public LookupStrategyDesc getStrategyDesc()

Specified by:

getStrategyDesc in interface JoinExecTableLookupStrategy