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

java.lang.Object
  com.espertech.esper.epl.join.base.JoinSetComposerImpl
      com.espertech.esper.epl.join.base.JoinSetComposerFAFImpl

All Implemented Interfaces:

JoinSetComposer

public class JoinSetComposerFAFImpl
extends JoinSetComposerImpl

Implements the function to determine a join result set using tables/indexes and query strategy instances for each stream.

Field Summary

Fields inherited from class com.espertech.esper.epl.join.base.JoinSetComposerImpl

newResults, oldResults, queryStrategies, repositories

Constructor Summary

JoinSetComposerFAFImpl(java.util.Map<TableLookupIndexReqKey,EventTable>[] repositories, QueryStrategy[] queryStrategies, boolean isPureSelfJoin, ExprEvaluatorContext exprEvaluatorContext, boolean joinRemoveStream, boolean outerJoins)

Method Summary

void	destroy() Destroy stateful index tables, if any.
void	init(EventBean[][] eventsPerStream) Provides initialization events per stream to composer to populate join indexes, if required
UniformPair<java.util.Set<MultiKey<EventBean>>>	join(EventBean[][] newDataPerStream, EventBean[][] oldDataPerStream, ExprEvaluatorContext exprEvaluatorContext) Return join tuple result set from new data and old data for each stream.
java.util.Set<MultiKey<EventBean>>	staticJoin() For use in iteration over join statements, this must build a join tuple result set from all events in indexes, executing query strategies for each.

Methods inherited from class com.espertech.esper.epl.join.base.JoinSetComposerImpl

getQueryStrategies, getTables, visitIndexes

Methods inherited from class java.lang.Object

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

Constructor Detail

JoinSetComposerFAFImpl

public JoinSetComposerFAFImpl(java.util.Map<TableLookupIndexReqKey,EventTable>[] repositories,
                              QueryStrategy[] queryStrategies,
                              boolean isPureSelfJoin,
                              ExprEvaluatorContext exprEvaluatorContext,
                              boolean joinRemoveStream,
                              boolean outerJoins)

Method Detail

init

public void init(EventBean[][] eventsPerStream)

Description copied from interface: JoinSetComposer

Provides initialization events per stream to composer to populate join indexes, if required

Specified by:

init in interface JoinSetComposer

Overrides:

init in class JoinSetComposerImpl

Parameters:

eventsPerStream - is an array of events for each stream, with null elements to indicate no events for a stream

destroy

public void destroy()

Description copied from interface: JoinSetComposer

Destroy stateful index tables, if any.

Specified by:

destroy in interface JoinSetComposer

Overrides:

destroy in class JoinSetComposerImpl

join

public UniformPair<java.util.Set<MultiKey<EventBean>>> join(EventBean[][] newDataPerStream,
                                                            EventBean[][] oldDataPerStream,
                                                            ExprEvaluatorContext exprEvaluatorContext)

Description copied from interface: JoinSetComposer

Return join tuple result set from new data and old data for each stream.

Specified by:

join in interface JoinSetComposer

Overrides:

join in class JoinSetComposerImpl

Parameters:

newDataPerStream - - for each stream the event array (can be null).

oldDataPerStream - - for each stream the event array (can be null).

exprEvaluatorContext - expression evaluation context

Returns:

join tuples

staticJoin

public java.util.Set<MultiKey<EventBean>> staticJoin()

Description copied from interface: JoinSetComposer

For use in iteration over join statements, this must build a join tuple result set from all events in indexes, executing query strategies for each.

Specified by:

staticJoin in interface JoinSetComposer

Overrides:

staticJoin in class JoinSetComposerImpl

Returns:

static join result