org.wso2.siddhi.core.query.selector.attribute.aggregator

Class AvgAttributeAggregator

java.lang.Object

org.wso2.siddhi.core.query.selector.attribute.aggregator.AttributeAggregator

org.wso2.siddhi.core.query.selector.attribute.aggregator.AvgAttributeAggregator

All Implemented Interfaces:

Snapshotable

public class AvgAttributeAggregator
extends AttributeAggregator

AttributeAggregator to calculate average based on an event attribute.

Field Summary

Fields inherited from class org.wso2.siddhi.core.query.selector.attribute.aggregator.AttributeAggregator

attributeExpressionExecutors, elementId, siddhiAppContext

Constructor Summary

Constructors

Constructor and Description
AvgAttributeAggregator()

Method Summary

Modifier and Type	Method and Description
boolean	canDestroy()
Map<String,Object>	currentState() Used to collect the serializable state of the processing element, that need to be persisted for the reconstructing the element to the same state on a different point of time
protected Object	currentValue()
org.wso2.siddhi.query.api.definition.Attribute.Type	getReturnType()
protected void	init(ExpressionExecutor[] attributeExpressionExecutors, ConfigReader configReader, SiddhiAppContext siddhiAppContext) 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) Used to restore serialized state of the processing element, for reconstructing the element to the same state as if was on a previous point of time.

Methods inherited from class org.wso2.siddhi.core.query.selector.attribute.aggregator.AttributeAggregator

cloneAggregator, getElementId, initAggregator, process

Methods inherited from class java.lang.Object

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

Constructor Detail

AvgAttributeAggregator

public AvgAttributeAggregator()

Method Detail

init

protected void init(ExpressionExecutor[] attributeExpressionExecutors,
                    ConfigReader configReader,
                    SiddhiAppContext siddhiAppContext)

The initialization method for FunctionExecutor

Specified by:

init in class AttributeAggregator

Parameters:

attributeExpressionExecutors - are the executors of each attributes in the function

configReader - this hold the AvgAttributeAggregator configuration reader.

siddhiAppContext - Siddhi app runtime context

getReturnType

public org.wso2.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()

Description copied from interface: Snapshotable

Used to collect the serializable state of the processing element, that need to be persisted for the reconstructing the element to the same state on a different point of time

Returns:

stateful objects of the processing element as an array

restoreState

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

Description copied from interface: Snapshotable

Used to restore serialized state of the processing element, for reconstructing the element to the same state as if was on a previous point of time.

Parameters:

state - the stateful objects of the element as an array on the same order provided by currentState().