Package io.siddhi.core.query.selector.attribute.aggregator

Class AttributeAggregatorExecutor<S extends State>

java.lang.Object

io.siddhi.core.query.selector.attribute.aggregator.AttributeAggregatorExecutor<S>

Type Parameters:

S - current state for the Attribute Executor

All Implemented Interfaces:

ExpressionExecutor, Serializable

Direct Known Subclasses:

AndAttributeAggregatorExecutor, AvgAttributeAggregatorExecutor, CountAttributeAggregatorExecutor, DistinctCountAttributeAggregatorExecutor, MaxAttributeAggregatorExecutor, MaxForeverAttributeAggregatorExecutor, MinAttributeAggregatorExecutor, MinForeverAttributeAggregatorExecutor, OrAttributeAggregatorExecutor, StdDevAttributeAggregatorExecutor, SumAttributeAggregatorExecutor, UnionSetAttributeAggregatorExecutor

public abstract class AttributeAggregatorExecutor<S extends State>
extends Object
implements ExpressionExecutor

Abstract parent class for attribute aggregators. Attribute aggregators are used to perform aggregate operations such as count, average, etc.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
protected ExpressionExecutor[]	attributeExpressionExecutors

Constructor Summary

Constructors

Constructor	Description
AttributeAggregatorExecutor()

Method Summary

Modifier and Type	Method	Description
Object	execute(ComplexEvent event)
protected abstract StateFactory<S>	init(ExpressionExecutor[] attributeExpressionExecutors, ProcessingMode processingMode, boolean outputExpectsExpiredEvents, ConfigReader configReader, SiddhiQueryContext siddhiQueryContext)	The initialization method for FunctionExecutor
void	initAggregator(ExpressionExecutor[] attributeExpressionExecutors, ProcessingMode processingMode, boolean outputExpectsExpiredEvents, ConfigReader configReader, boolean groupBy, SiddhiQueryContext siddhiQueryContext)
abstract Object	processAdd(Object[] data, S state)
abstract Object	processAdd(Object data, S state)
abstract Object	processRemove(Object[] data, S state)
abstract Object	processRemove(Object data, S state)
abstract Object	reset(S state)

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.siddhi.core.executor.ExpressionExecutor

getReturnType

Field Detail

attributeExpressionExecutors

protected ExpressionExecutor[] attributeExpressionExecutors

Constructor Detail

AttributeAggregatorExecutor

public AttributeAggregatorExecutor()

Method Detail

initAggregator

public void initAggregator(ExpressionExecutor[] attributeExpressionExecutors,
                           ProcessingMode processingMode,
                           boolean outputExpectsExpiredEvents,
                           ConfigReader configReader,
                           boolean groupBy,
                           SiddhiQueryContext siddhiQueryContext)

execute

public Object execute(ComplexEvent event)

Specified by:

execute in interface ExpressionExecutor

init

protected abstract StateFactory<S> init(ExpressionExecutor[] attributeExpressionExecutors,
                                        ProcessingMode processingMode,
                                        boolean outputExpectsExpiredEvents,
                                        ConfigReader configReader,
                                        SiddhiQueryContext siddhiQueryContext)

The initialization method for FunctionExecutor

Parameters:

attributeExpressionExecutors - are the executors of each attributes in the function

processingMode - query processing mode

outputExpectsExpiredEvents - is expired events sent as output

configReader - this hold the AttributeAggregatorExecutor extensions configuration reader.

siddhiQueryContext - Siddhi query runtime context

processAdd

public abstract Object processAdd(Object data,
                                  S state)

processAdd

public abstract Object processAdd(Object[] data,
                                  S state)

processRemove

public abstract Object processRemove(Object data,
                                     S state)

processRemove

public abstract Object processRemove(Object[] data,
                                     S state)

reset

public abstract Object reset(S state)