com.espertech.esper.epl.join.base
Class HistoricalIndexLookupStrategyIndexSingle

java.lang.Object
  com.espertech.esper.epl.join.base.HistoricalIndexLookupStrategyIndexSingle

All Implemented Interfaces:

HistoricalIndexLookupStrategy

public class HistoricalIndexLookupStrategyIndexSingle
extends java.lang.Object
implements HistoricalIndexLookupStrategy

Index lookup strategy into a poll-based cache result.

Constructor Summary

HistoricalIndexLookupStrategyIndexSingle(int lookupStream, QueryGraphValueEntryHashKeyed hashKey)
Ctor.

Method Summary

java.util.Iterator<EventBean>	lookup(EventBean lookupEvent, EventTable[] indexTable, ExprEvaluatorContext exprEvaluatorContext) Look up into the index, potentially using some of the properties in the lookup event, returning a partial or full result in respect to the index.
java.lang.String	toQueryPlan()

Methods inherited from class java.lang.Object

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

Constructor Detail

HistoricalIndexLookupStrategyIndexSingle

public HistoricalIndexLookupStrategyIndexSingle(int lookupStream,
                                                QueryGraphValueEntryHashKeyed hashKey)

Ctor.

Method Detail

lookup

public java.util.Iterator<EventBean> lookup(EventBean lookupEvent,
                                            EventTable[] indexTable,
                                            ExprEvaluatorContext exprEvaluatorContext)

Description copied from interface: HistoricalIndexLookupStrategy

Look up into the index, potentially using some of the properties in the lookup event, returning a partial or full result in respect to the index.

Specified by:

lookup in interface HistoricalIndexLookupStrategy

Parameters:

lookupEvent - provides properties to use as key values for indexes

indexTable - is the table providing the cache result set, potentially indexed by index fields

Returns:

full set or partial index iterator

toQueryPlan

public java.lang.String toQueryPlan()

Specified by:

toQueryPlan in interface HistoricalIndexLookupStrategy