com.espertech.esper.epl.core

Class ResultSetProcessorSimple

java.lang.Object

com.espertech.esper.epl.core.ResultSetProcessorBaseSimple

com.espertech.esper.epl.core.ResultSetProcessorSimple

All Implemented Interfaces:

ResultSetProcessor, StopCallback

public class ResultSetProcessorSimple
extends ResultSetProcessorBaseSimple

Result set processor for the simplest case: no aggregation functions used in the select clause, and no group-by.

The processor generates one row for each event entering (new event) and one row for each event leaving (old event).

Field Summary

Fields

Modifier and Type	Field and Description
protected ExprEvaluatorContext	exprEvaluatorContext
protected ResultSetProcessorSimpleFactory	prototype

Constructor Summary

Constructors

Constructor and Description
ResultSetProcessorSimple(ResultSetProcessorSimpleFactory prototype, SelectExprProcessor selectExprProcessor, OrderByProcessor orderByProcessor, AgentInstanceContext agentInstanceContext)

Method Summary

Modifier and Type	Method and Description
void	acceptHelperVisitor(ResultSetProcessorOutputHelperVisitor visitor)
void	applyJoinResult(Set<MultiKey<EventBean>> newEvents, Set<MultiKey<EventBean>> oldEvents)
void	applyViewResult(EventBean[] newData, EventBean[] oldData)
void	clear() Clear out current state.
UniformPair<EventBean[]>	continueOutputLimitedLastAllNonBufferedJoin(boolean isSynthesize, boolean isAll)
UniformPair<EventBean[]>	continueOutputLimitedLastAllNonBufferedView(boolean isSynthesize, boolean isAll)
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.
boolean	hasAggregation()
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).
void	processOutputLimitedLastAllNonBufferedJoin(Set<MultiKey<EventBean>> newEvents, Set<MultiKey<EventBean>> oldEvents, boolean isGenerateSynthetic, boolean isAll)
void	processOutputLimitedLastAllNonBufferedView(EventBean[] newData, EventBean[] oldData, boolean isGenerateSynthetic, boolean isAll)
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).
UniformPair<EventBean[]>	processViewResultIterator(EventBean[] newData) Process view results for the iterator.
void	setAgentInstanceContext(AgentInstanceContext context)
void	stop() Stops the underlying resources.

Methods inherited from class com.espertech.esper.epl.core.ResultSetProcessorBaseSimple

processOutputLimitedJoin, processOutputLimitedView

Methods inherited from class java.lang.Object

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

Field Detail

prototype

protected final ResultSetProcessorSimpleFactory prototype

exprEvaluatorContext

protected ExprEvaluatorContext exprEvaluatorContext

Constructor Detail

ResultSetProcessorSimple

public ResultSetProcessorSimple(ResultSetProcessorSimpleFactory prototype,
                                SelectExprProcessor selectExprProcessor,
                                OrderByProcessor orderByProcessor,
                                AgentInstanceContext agentInstanceContext)

Method Detail

setAgentInstanceContext

public void setAgentInstanceContext(AgentInstanceContext context)

getResultEventType

public EventType getResultEventType()

Description copied from interface: ResultSetProcessor

Returns the event type of processed results.

Returns:

event type of the resulting events posted by the processor.

processJoinResult

public UniformPair<EventBean[]> processJoinResult(Set<MultiKey<EventBean>> newEvents,
                                                  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.

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.

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

processViewResultIterator

public UniformPair<EventBean[]> processViewResultIterator(EventBean[] newData)

Process view results for the iterator.

Parameters:

newData - new events

Returns:

pair of insert and remove stream

getIterator

public 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.

Parameters:

parent - is the parent view iterator

Returns:

event iterator

getIterator

public Iterator<EventBean> getIterator(Set<MultiKey<EventBean>> joinSet)

Description copied from interface: ResultSetProcessor

Returns the iterator for iterating over a join-result.

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

Overrides:

clear in class ResultSetProcessorBaseSimple

hasAggregation

public boolean hasAggregation()

applyViewResult

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

applyJoinResult

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

processOutputLimitedLastAllNonBufferedView

public void processOutputLimitedLastAllNonBufferedView(EventBean[] newData,
                                                       EventBean[] oldData,
                                                       boolean isGenerateSynthetic,
                                                       boolean isAll)

processOutputLimitedLastAllNonBufferedJoin

public void processOutputLimitedLastAllNonBufferedJoin(Set<MultiKey<EventBean>> newEvents,
                                                       Set<MultiKey<EventBean>> oldEvents,
                                                       boolean isGenerateSynthetic,
                                                       boolean isAll)

continueOutputLimitedLastAllNonBufferedView

public UniformPair<EventBean[]> continueOutputLimitedLastAllNonBufferedView(boolean isSynthesize,
                                                                            boolean isAll)

continueOutputLimitedLastAllNonBufferedJoin

public UniformPair<EventBean[]> continueOutputLimitedLastAllNonBufferedJoin(boolean isSynthesize,
                                                                            boolean isAll)

stop

public void stop()

Description copied from interface: StopCallback

Stops the underlying resources.

acceptHelperVisitor

public void acceptHelperVisitor(ResultSetProcessorOutputHelperVisitor visitor)