com.espertech.esper.epl.agg.service
Class AggSvcGroupByWTableBase

java.lang.Object
  com.espertech.esper.epl.agg.service.AggSvcGroupByWTableBase

All Implemented Interfaces:

AggregationResultFuture, AggregationService

Direct Known Subclasses:

AggSvcGroupByWTableImpl, AggSvcGroupByWTableRollupMultiKeyImpl, AggSvcGroupByWTableRollupSingleKeyImpl

public abstract class AggSvcGroupByWTableBase
extends java.lang.Object
implements AggregationService

Implementation for handling aggregation with grouping by group-keys.

Field Summary

protected AggregationAccessorSlotPair[]	accessors
protected ExprNode[]	accessStateExpr
protected AggregationMethod[]	currentAggregatorMethods
protected AggregationState[]	currentAggregatorStates
protected java.lang.Object	currentGroupKey
protected boolean	isJoin
protected TableColumnMethodPair[]	methodPairs
protected TableMetadata	tableMetadata
protected TableStateInstanceGroupBy	tableStateInstance
protected int[]	targetStates

Constructor Summary

AggSvcGroupByWTableBase(TableMetadata tableMetadata, TableColumnMethodPair[] methodPairs, AggregationAccessorSlotPair[] accessors, boolean join, TableStateInstanceGroupBy tableStateInstance, int[] targetStates, ExprNode[] accessStateExpr, AggregationAgent[] agents)

Method Summary

void	accept(AggregationServiceVisitor visitor)
void	acceptGroupDetail(AggregationServiceVisitorWGroupDetail visitor)
void	applyEnter(EventBean[] eventsPerStream, java.lang.Object groupByKey, ExprEvaluatorContext exprEvaluatorContext) Apply events as entering a window (new events).
protected void	applyEnterGroupKey(EventBean[] eventsPerStream, java.lang.Object groupByKey, ExprEvaluatorContext exprEvaluatorContext)
abstract void	applyEnterInternal(EventBean[] eventsPerStream, java.lang.Object groupByKey, ExprEvaluatorContext exprEvaluatorContext)
void	applyLeave(EventBean[] eventsPerStream, java.lang.Object groupByKey, ExprEvaluatorContext exprEvaluatorContext) Apply events as leaving a window (old events).
protected void	applyLeaveGroupKey(EventBean[] eventsPerStream, java.lang.Object groupByKey, ExprEvaluatorContext exprEvaluatorContext)
abstract void	applyLeaveInternal(EventBean[] eventsPerStream, java.lang.Object groupByKey, ExprEvaluatorContext exprEvaluatorContext)
void	clearResults(ExprEvaluatorContext exprEvaluatorContext) Clear current aggregation state.
java.util.Collection<EventBean>	getCollectionOfEvents(int column, EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext context)
java.util.Collection<java.lang.Object>	getCollectionScalar(int column, EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext context)
EventBean	getEventBean(int column, EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext context)
java.lang.Object	getGroupKey(int agentInstanceId)
java.util.Collection<java.lang.Object>	getGroupKeys(ExprEvaluatorContext exprEvaluatorContext)
java.lang.Object	getValue(int column, int agentInstanceId, EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext exprEvaluatorContext) Returns current aggregation state, for use by expression node representing an aggregation function.
boolean	isGrouped()
void	setCurrentAccess(java.lang.Object groupByKey, int agentInstanceId, AggregationGroupByRollupLevel rollupLevel) Set the current aggregation state row - for use when evaluation nodes are asked to evaluate.
void	setRemovedCallback(AggregationRowRemovedCallback callback)

Methods inherited from class java.lang.Object

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

Field Detail

tableMetadata

protected final TableMetadata tableMetadata

methodPairs

protected final TableColumnMethodPair[] methodPairs

accessors

protected final AggregationAccessorSlotPair[] accessors

isJoin

protected final boolean isJoin

tableStateInstance

protected final TableStateInstanceGroupBy tableStateInstance

targetStates

protected final int[] targetStates

accessStateExpr

protected final ExprNode[] accessStateExpr

currentAggregatorMethods

protected AggregationMethod[] currentAggregatorMethods

currentAggregatorStates

protected AggregationState[] currentAggregatorStates

currentGroupKey

protected java.lang.Object currentGroupKey

Constructor Detail

AggSvcGroupByWTableBase

public AggSvcGroupByWTableBase(TableMetadata tableMetadata,
                               TableColumnMethodPair[] methodPairs,
                               AggregationAccessorSlotPair[] accessors,
                               boolean join,
                               TableStateInstanceGroupBy tableStateInstance,
                               int[] targetStates,
                               ExprNode[] accessStateExpr,
                               AggregationAgent[] agents)

Method Detail

applyEnterInternal

public abstract void applyEnterInternal(EventBean[] eventsPerStream,
                                        java.lang.Object groupByKey,
                                        ExprEvaluatorContext exprEvaluatorContext)

applyLeaveInternal

public abstract void applyLeaveInternal(EventBean[] eventsPerStream,
                                        java.lang.Object groupByKey,
                                        ExprEvaluatorContext exprEvaluatorContext)

applyEnter

public void applyEnter(EventBean[] eventsPerStream,
                       java.lang.Object groupByKey,
                       ExprEvaluatorContext exprEvaluatorContext)

Description copied from interface: AggregationService

Apply events as entering a window (new events).

Specified by:

applyEnter in interface AggregationService

Parameters:

eventsPerStream - - events for each stream entering window

groupByKey - - can be null if grouping without keys is desired, else the keys or array of keys to use for grouping, each distinct key value results in a new row of aggregation state.

exprEvaluatorContext - context for expression evaluatiom

applyLeave

public void applyLeave(EventBean[] eventsPerStream,
                       java.lang.Object groupByKey,
                       ExprEvaluatorContext exprEvaluatorContext)

Description copied from interface: AggregationService

Apply events as leaving a window (old events).

Specified by:

applyLeave in interface AggregationService

Parameters:

eventsPerStream - - events for each stream entering window

groupByKey - - can be null if grouping without keys is desired, else the keys or array of keys to use for grouping, each distinct key value results in a new row of aggregation state.

exprEvaluatorContext - context for expression evaluatiom

applyEnterGroupKey

protected void applyEnterGroupKey(EventBean[] eventsPerStream,
                                  java.lang.Object groupByKey,
                                  ExprEvaluatorContext exprEvaluatorContext)

applyLeaveGroupKey

protected void applyLeaveGroupKey(EventBean[] eventsPerStream,
                                  java.lang.Object groupByKey,
                                  ExprEvaluatorContext exprEvaluatorContext)

setCurrentAccess

public void setCurrentAccess(java.lang.Object groupByKey,
                             int agentInstanceId,
                             AggregationGroupByRollupLevel rollupLevel)

Description copied from interface: AggregationService

Set the current aggregation state row - for use when evaluation nodes are asked to evaluate.

Specified by:

setCurrentAccess in interface AggregationService

Parameters:

groupByKey - - single key identifying the row of aggregation states

agentInstanceId - context partition id

getValue

public java.lang.Object getValue(int column,
                                 int agentInstanceId,
                                 EventBean[] eventsPerStream,
                                 boolean isNewData,
                                 ExprEvaluatorContext exprEvaluatorContext)

Description copied from interface: AggregationResultFuture

Returns current aggregation state, for use by expression node representing an aggregation function.

Specified by:

getValue in interface AggregationResultFuture

Parameters:

column - is assigned to the aggregation expression node and passed as an column (index) into a row

agentInstanceId - the context partition id

Returns:

current aggragation state

getCollectionOfEvents

public java.util.Collection<EventBean> getCollectionOfEvents(int column,
                                                             EventBean[] eventsPerStream,
                                                             boolean isNewData,
                                                             ExprEvaluatorContext context)

Specified by:

getCollectionOfEvents in interface AggregationResultFuture

getCollectionScalar

public java.util.Collection<java.lang.Object> getCollectionScalar(int column,
                                                                  EventBean[] eventsPerStream,
                                                                  boolean isNewData,
                                                                  ExprEvaluatorContext context)

Specified by:

getCollectionScalar in interface AggregationResultFuture

getEventBean

public EventBean getEventBean(int column,
                              EventBean[] eventsPerStream,
                              boolean isNewData,
                              ExprEvaluatorContext context)

Specified by:

getEventBean in interface AggregationResultFuture

setRemovedCallback

public void setRemovedCallback(AggregationRowRemovedCallback callback)

Specified by:

setRemovedCallback in interface AggregationService

accept

public void accept(AggregationServiceVisitor visitor)

Specified by:

accept in interface AggregationService

acceptGroupDetail

public void acceptGroupDetail(AggregationServiceVisitorWGroupDetail visitor)

Specified by:

acceptGroupDetail in interface AggregationService

isGrouped

public boolean isGrouped()

Specified by:

isGrouped in interface AggregationService

getGroupKey

public java.lang.Object getGroupKey(int agentInstanceId)

Specified by:

getGroupKey in interface AggregationResultFuture

getGroupKeys

public java.util.Collection<java.lang.Object> getGroupKeys(ExprEvaluatorContext exprEvaluatorContext)

Specified by:

getGroupKeys in interface AggregationResultFuture

clearResults

public void clearResults(ExprEvaluatorContext exprEvaluatorContext)

Description copied from interface: AggregationService

Clear current aggregation state.

Specified by:

clearResults in interface AggregationService