com.espertech.esper.epl.core
Class ResultSetProcessorAggregateAll

java.lang.Object
  com.espertech.esper.epl.core.ResultSetProcessorAggregateAll

All Implemented Interfaces:

ResultSetProcessor

public class ResultSetProcessorAggregateAll
extends java.lang.Object
implements ResultSetProcessor

Result set processor for the case: aggregation functions used in the select clause, and no group-by, and not all of the properties in the select clause are under an aggregation function.

This processor does not perform grouping, every event entering and leaving is in the same group. The processor generates one row for each event entering (new event) and one row for each event leaving (old event). Aggregation state is simply one row holding all the state.

Constructor Summary

ResultSetProcessorAggregateAll(ResultSetProcessorAggregateAllFactory prototype, SelectExprProcessor selectExprProcessor, OrderByProcessor orderByProcessor, AggregationService aggregationService, ExprEvaluatorContext exprEvaluatorContext)

Method Summary

void	applyJoinResult(java.util.Set<MultiKey<EventBean>> newEvents, java.util.Set<MultiKey<EventBean>> oldEvents)
void	applyViewResult(EventBean[] newData, EventBean[] oldData)
void	clear() Clear out current state.
java.util.Iterator<EventBean>	getIterator(java.util.Set<MultiKey<EventBean>> joinSet) Returns the iterator for iterating over a join-result.
java.util.Iterator<EventBean>	getIterator(Viewable parent) Returns the iterator implementing the group-by and aggregation and order-by logic specific to each case of use of these construct.
ExprEvaluator	getOptionalHavingNode() Returns the optional having expression.
EventType	getResultEventType() Returns the event type of processed results.
SelectExprProcessor	getSelectExprProcessor() Returns the select expression processor
boolean	hasAggregation()
java.util.Iterator<EventBean>	obtainIterator(Viewable parent)
UniformPair<EventBean[]>	processJoinResult(java.util.Set<MultiKey<EventBean>> newEvents, java.util.Set<MultiKey<EventBean>> oldEvents, boolean isSynthesize) For use by joins posting their result, process the event rows that are entered and removed (new and old events).
UniformPair<EventBean[]>	processOutputLimitedJoin(java.util.List<UniformPair<java.util.Set<MultiKey<EventBean>>>> joinEventsSet, boolean generateSynthetic, OutputLimitLimitType outputLimitLimitType) Processes batched events in case of output-rate limiting.
UniformPair<EventBean[]>	processOutputLimitedView(java.util.List<UniformPair<EventBean[]>> viewEventsList, boolean generateSynthetic, OutputLimitLimitType outputLimitLimitType) Processes batched events in case of output-rate limiting.
UniformPair<EventBean[]>	processViewResult(EventBean[] newData, EventBean[] oldData, boolean isSynthesize) For use by views posting their result, process the event rows that are entered and removed (new and old events).
void	setAgentInstanceContext(AgentInstanceContext context)

Methods inherited from class java.lang.Object

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

Constructor Detail

ResultSetProcessorAggregateAll

public ResultSetProcessorAggregateAll(ResultSetProcessorAggregateAllFactory prototype,
                                      SelectExprProcessor selectExprProcessor,
                                      OrderByProcessor orderByProcessor,
                                      AggregationService aggregationService,
                                      ExprEvaluatorContext exprEvaluatorContext)

Method Detail

setAgentInstanceContext

public void setAgentInstanceContext(AgentInstanceContext context)

Specified by:

setAgentInstanceContext in interface ResultSetProcessor

getResultEventType

public EventType getResultEventType()

Description copied from interface: ResultSetProcessor

Returns the event type of processed results.

Specified by:

getResultEventType in interface ResultSetProcessor

Returns:

event type of the resulting events posted by the processor.

applyViewResult

public void applyViewResult(EventBean[] newData,
                            EventBean[] oldData)

Specified by:

applyViewResult in interface ResultSetProcessor

applyJoinResult

public void applyJoinResult(java.util.Set<MultiKey<EventBean>> newEvents,
                            java.util.Set<MultiKey<EventBean>> oldEvents)

Specified by:

applyJoinResult in interface ResultSetProcessor

processJoinResult

public UniformPair<EventBean[]> processJoinResult(java.util.Set<MultiKey<EventBean>> newEvents,
                                                  java.util.Set<MultiKey<EventBean>> oldEvents,
                                                  boolean isSynthesize)

Description copied from interface: ResultSetProcessor

For use by joins posting their result, process the event rows that are entered and removed (new and old events). Processes according to select-clauses, group-by clauses and having-clauses and returns new events and old events as specified.

Specified by:

processJoinResult in interface ResultSetProcessor

Parameters:

newEvents - - new events posted by join

oldEvents - - old events posted by join

isSynthesize - - set to true to indicate that synthetic events are required for an iterator result set

Returns:

pair of new events and old events

processViewResult

public UniformPair<EventBean[]> processViewResult(EventBean[] newData,
                                                  EventBean[] oldData,
                                                  boolean isSynthesize)

Description copied from interface: ResultSetProcessor

For use by views posting their result, process the event rows that are entered and removed (new and old events). Processes according to select-clauses, group-by clauses and having-clauses and returns new events and old events as specified.

Specified by:

processViewResult in interface ResultSetProcessor

Parameters:

newData - - new events posted by view

oldData - - old events posted by view

isSynthesize - - set to true to indicate that synthetic events are required for an iterator result set

Returns:

pair of new events and old events

getIterator

public java.util.Iterator<EventBean> getIterator(Viewable parent)

Description copied from interface: ResultSetProcessor

Returns the iterator implementing the group-by and aggregation and order-by logic specific to each case of use of these construct.

Specified by:

getIterator in interface ResultSetProcessor

Parameters:

parent - is the parent view iterator

Returns:

event iterator

obtainIterator

public java.util.Iterator<EventBean> obtainIterator(Viewable parent)

getSelectExprProcessor

public SelectExprProcessor getSelectExprProcessor()

Returns the select expression processor

Returns:

select processor.

getOptionalHavingNode

public ExprEvaluator getOptionalHavingNode()

Returns the optional having expression.

Returns:

having expression node

getIterator

public java.util.Iterator<EventBean> getIterator(java.util.Set<MultiKey<EventBean>> joinSet)

Description copied from interface: ResultSetProcessor

Returns the iterator for iterating over a join-result.

Specified by:

getIterator in interface ResultSetProcessor

Parameters:

joinSet - is the join result set

Returns:

iterator over join results

clear

public void clear()

Description copied from interface: ResultSetProcessor

Clear out current state.

Specified by:

clear in interface ResultSetProcessor

processOutputLimitedJoin

public UniformPair<EventBean[]> processOutputLimitedJoin(java.util.List<UniformPair<java.util.Set<MultiKey<EventBean>>>> joinEventsSet,
                                                         boolean generateSynthetic,
                                                         OutputLimitLimitType outputLimitLimitType)

Description copied from interface: ResultSetProcessor

Processes batched events in case of output-rate limiting.

Specified by:

processOutputLimitedJoin in interface ResultSetProcessor

Parameters:

joinEventsSet - the join results

generateSynthetic - flag to indicate whether synthetic events must be generated

outputLimitLimitType - the type of output rate limiting

Returns:

results for dispatch

processOutputLimitedView

public UniformPair<EventBean[]> processOutputLimitedView(java.util.List<UniformPair<EventBean[]>> viewEventsList,
                                                         boolean generateSynthetic,
                                                         OutputLimitLimitType outputLimitLimitType)

Description copied from interface: ResultSetProcessor

Processes batched events in case of output-rate limiting.

Specified by:

processOutputLimitedView in interface ResultSetProcessor

Parameters:

viewEventsList - the view results

generateSynthetic - flag to indicate whether synthetic events must be generated

outputLimitLimitType - the type of output rate limiting

Returns:

results for dispatch

hasAggregation

public boolean hasAggregation()

Specified by:

hasAggregation in interface ResultSetProcessor