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

Class IncrementalAttributeAggregator

java.lang.Object

io.siddhi.core.query.selector.attribute.aggregator.incremental.IncrementalAttributeAggregator

Direct Known Subclasses:

AvgIncrementalAttributeAggregator, CountIncrementalAttributeAggregator, DistinctCountIncrementalAttributeAggregator, MaxIncrementalAttributeAggregator, MinIncrementalAttributeAggregator, SumIncrementalAttributeAggregator

public abstract class IncrementalAttributeAggregator
extends Object

Abstract class for incremental aggregators

Constructor Summary

Constructors

Constructor	Description
IncrementalAttributeAggregator()

Method Summary

Modifier and Type	Method	Description
abstract io.siddhi.query.api.expression.Expression	aggregate()
abstract io.siddhi.query.api.expression.Expression[]	getBaseAggregators()
abstract io.siddhi.query.api.expression.Expression[]	getBaseAttributeInitialValues()
abstract io.siddhi.query.api.definition.Attribute[]	getBaseAttributes()
abstract io.siddhi.query.api.definition.Attribute.Type	getReturnType()
abstract void	init(String attributeName, io.siddhi.query.api.definition.Attribute.Type attributeType)

Methods inherited from class java.lang.Object

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

Constructor Detail

IncrementalAttributeAggregator

public IncrementalAttributeAggregator()

Method Detail

init

public abstract void init(String attributeName,
                          io.siddhi.query.api.definition.Attribute.Type attributeType)

aggregate

public abstract io.siddhi.query.api.expression.Expression aggregate()

getBaseAttributes

public abstract io.siddhi.query.api.definition.Attribute[] getBaseAttributes()

getBaseAttributeInitialValues

public abstract io.siddhi.query.api.expression.Expression[] getBaseAttributeInitialValues()

getBaseAggregators

public abstract io.siddhi.query.api.expression.Expression[] getBaseAggregators()

getReturnType

public abstract io.siddhi.query.api.definition.Attribute.Type getReturnType()