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

Class StdDevAttributeAggregator

java.lang.Object

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

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

public class StdDevAttributeAggregator
extends AttributeAggregator

AttributeAggregator to calculate standard deviation based on an event attribute.

Field Summary

Fields inherited from class io.siddhi.core.query.selector.attribute.aggregator.AttributeAggregator

attributeExpressionExecutors

Constructor Summary

Constructors

Constructor and Description
StdDevAttributeAggregator()

Method Summary

Modifier and Type	Method and Description
boolean	canDestroy()
Map<String,Object>	currentState()
protected Object	currentValue()
io.siddhi.query.api.definition.Attribute.Type	getReturnType()
protected void	init(ExpressionExecutor[] attributeExpressionExecutors, ProcessingMode processingMode, boolean outputExpectsExpiredEvents, ConfigReader configReader, SiddhiQueryContext siddhiQueryContext) The initialization method for FunctionExecutor
Object	processAdd(Object data)
Object	processAdd(Object[] data)
Object	processRemove(Object data)
Object	processRemove(Object[] data)
Object	reset()
void	restoreState(Map<String,Object> state)

Methods inherited from class io.siddhi.core.query.selector.attribute.aggregator.AttributeAggregator

clean, cloneAggregator, initAggregator, process

Methods inherited from class java.lang.Object

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

Constructor Detail

StdDevAttributeAggregator

public StdDevAttributeAggregator()

Method Detail

init

protected void init(ExpressionExecutor[] attributeExpressionExecutors,
                    ProcessingMode processingMode,
                    boolean outputExpectsExpiredEvents,
                    ConfigReader configReader,
                    SiddhiQueryContext siddhiQueryContext)

The initialization method for FunctionExecutor

Specified by:

init in class AttributeAggregator

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 StdDevAttributeAggregator configuration reader.

siddhiQueryContext - Siddhi query runtime context

getReturnType

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

Specified by:

getReturnType in class AttributeAggregator

processAdd

public Object processAdd(Object data)

Specified by:

processAdd in class AttributeAggregator

processAdd

public Object processAdd(Object[] data)

Specified by:

processAdd in class AttributeAggregator

processRemove

public Object processRemove(Object data)

Specified by:

processRemove in class AttributeAggregator

processRemove

public Object processRemove(Object[] data)

Specified by:

processRemove in class AttributeAggregator

currentValue

protected Object currentValue()

canDestroy

public boolean canDestroy()

Specified by:

canDestroy in class AttributeAggregator

reset

public Object reset()

Specified by:

reset in class AttributeAggregator

currentState

public Map<String,Object> currentState()

Specified by:

currentState in class AttributeAggregator

restoreState

public void restoreState(Map<String,Object> state)

Specified by:

restoreState in class AttributeAggregator