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java.lang.Objectcom.espertech.esper.epl.core.ResultSetProcessorRowForAll
public class ResultSetProcessorRowForAll
Result set processor for the case: aggregation functions used in the select clause, and no group-by, and all 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. Produces one old event and one new event row every time either at least one old or new event is received. Aggregation state is simply one row holding all the state.
Constructor Summary | |
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ResultSetProcessorRowForAll(SelectExprProcessor selectExprProcessor,
AggregationService aggregationService,
OrderByProcessor orderByProcessor,
ExprNode optionalHavingNode,
boolean isSelectRStream)
Ctor. |
Method Summary | |
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void |
clear()
Clear out current state. |
Iterator<EventBean> |
getIterator(Set<MultiKey<EventBean>> joinSet)
Returns the iterator for iterating over a join-result. |
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. |
EventType |
getResultEventType()
Returns the event type of processed results. |
UniformPair<EventBean[]> |
processJoinResult(Set<MultiKey<EventBean>> newEvents,
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(List<UniformPair<Set<MultiKey<EventBean>>>> joinEventsSet,
boolean generateSynthetic,
OutputLimitLimitType outputLimitLimitType)
Processes batched events in case of output-rate limiting. |
UniformPair<EventBean[]> |
processOutputLimitedView(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). |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public ResultSetProcessorRowForAll(SelectExprProcessor selectExprProcessor, AggregationService aggregationService, OrderByProcessor orderByProcessor, ExprNode optionalHavingNode, boolean isSelectRStream)
selectExprProcessor
- - for processing the select expression and generting the final output rowsaggregationService
- - handles aggregationoptionalHavingNode
- - having clause expression nodeisSelectRStream
- - true if remove stream events should be generatedorderByProcessor
- - for ordering output eventsMethod Detail |
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public EventType getResultEventType()
ResultSetProcessor
getResultEventType
in interface ResultSetProcessor
public UniformPair<EventBean[]> processJoinResult(Set<MultiKey<EventBean>> newEvents, Set<MultiKey<EventBean>> oldEvents, boolean isSynthesize)
ResultSetProcessor
processJoinResult
in interface ResultSetProcessor
newEvents
- - new events posted by joinoldEvents
- - old events posted by joinisSynthesize
- - set to true to indicate that synthetic events are required for an iterator result set
public UniformPair<EventBean[]> processViewResult(EventBean[] newData, EventBean[] oldData, boolean isSynthesize)
ResultSetProcessor
processViewResult
in interface ResultSetProcessor
newData
- - new events posted by viewoldData
- - old events posted by viewisSynthesize
- - set to true to indicate that synthetic events are required for an iterator result set
public Iterator<EventBean> getIterator(Viewable parent)
ResultSetProcessor
getIterator
in interface ResultSetProcessor
parent
- is the parent view iterator
public Iterator<EventBean> getIterator(Set<MultiKey<EventBean>> joinSet)
ResultSetProcessor
getIterator
in interface ResultSetProcessor
joinSet
- is the join result set
public void clear()
ResultSetProcessor
clear
in interface ResultSetProcessor
public UniformPair<EventBean[]> processOutputLimitedJoin(List<UniformPair<Set<MultiKey<EventBean>>>> joinEventsSet, boolean generateSynthetic, OutputLimitLimitType outputLimitLimitType)
ResultSetProcessor
processOutputLimitedJoin
in interface ResultSetProcessor
joinEventsSet
- the join resultsgenerateSynthetic
- flag to indicate whether synthetic events must be generatedoutputLimitLimitType
- the type of output rate limiting
public UniformPair<EventBean[]> processOutputLimitedView(List<UniformPair<EventBean[]>> viewEventsList, boolean generateSynthetic, OutputLimitLimitType outputLimitLimitType)
ResultSetProcessor
processOutputLimitedView
in interface ResultSetProcessor
viewEventsList
- the view resultsgenerateSynthetic
- flag to indicate whether synthetic events must be generatedoutputLimitLimitType
- the type of output rate limiting
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