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

java.lang.Object
  com.espertech.esper.epl.join.exec.base.FullTableScanUniqueValueLookupStrategy

All Implemented Interfaces:

JoinExecTableLookupStrategy

public class FullTableScanUniqueValueLookupStrategy
extends java.lang.Object
implements JoinExecTableLookupStrategy

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

Constructor Summary

FullTableScanUniqueValueLookupStrategy(EventTableAsSet eventIndex)
Ctor.

Method Summary

LookupStrategyDesc	getStrategyDesc()
java.util.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

FullTableScanUniqueValueLookupStrategy

public FullTableScanUniqueValueLookupStrategy(EventTableAsSet eventIndex)

Ctor.

Parameters:

eventIndex - - table to use

Method Detail

lookup

public java.util.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

getStrategyDesc

public LookupStrategyDesc getStrategyDesc()

Specified by:

getStrategyDesc in interface JoinExecTableLookupStrategy