Package com.espertech.esper.common.internal.epl.historical.indexingstrategy

Interface PollResultIndexingStrategy

All Known Implementing Classes:

PollResultIndexingStrategyComposite, PollResultIndexingStrategyHash, PollResultIndexingStrategyInKeywordMulti, PollResultIndexingStrategyMulti, PollResultIndexingStrategyNoIndex, PollResultIndexingStrategySorted

public interface PollResultIndexingStrategy

A strategy for converting a poll-result into a potentially indexed table.

Some implementations may decide to not index the poll result and simply hold a reference to the result. Other implementations may use predetermined index properties to index the poll result for faster lookup.

Field Summary

Fields

Modifier and Type	Field	Description
static final EPTypeClass	EPTYPE
static final EPTypeClass	EPTYPEARRAY

Method Summary

Modifier and Type	Method	Description
EventTable[]	index(List<EventBean> pollResult, boolean isActiveCache, ExprEvaluatorContext exprEvaluatorContext)	Build and index of a poll result.

Field Details

EPTYPE

static final EPTypeClass EPTYPE

EPTYPEARRAY

static final EPTypeClass EPTYPEARRAY

Method Details

index

EventTable[] index(List<EventBean> pollResult,
 boolean isActiveCache,
 ExprEvaluatorContext exprEvaluatorContext)

Build and index of a poll result.

Parameters:

pollResult - result of a poll operation

isActiveCache - true to indicate that caching is active and therefore index building makes sense as the index structure is not a throw-away.

exprEvaluatorContext - statement context

Returns:

indexed collection of poll results