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

Class DistinctCountAttributeAggregatorExecutor

java.lang.Object

io.siddhi.core.query.selector.attribute.aggregator.AttributeAggregatorExecutor<io.siddhi.core.query.selector.attribute.aggregator.DistinctCountAttributeAggregatorExecutor.AggregatorState>

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

All Implemented Interfaces:

ExpressionExecutor, Serializable

public class DistinctCountAttributeAggregatorExecutor
extends AttributeAggregatorExecutor<io.siddhi.core.query.selector.attribute.aggregator.DistinctCountAttributeAggregatorExecutor.AggregatorState>

AttributeAggregatorExecutor to calculate distinct count based on an event attribute.

See Also:

Serialized Form

Field Summary

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

attributeExpressionExecutors

Constructor Summary

Constructors

Constructor	Description
DistinctCountAttributeAggregatorExecutor()

Method Summary

Modifier and Type	Method	Description
io.siddhi.query.api.definition.Attribute.Type	getReturnType()
protected StateFactory<io.siddhi.core.query.selector.attribute.aggregator.DistinctCountAttributeAggregatorExecutor.AggregatorState>	init(ExpressionExecutor[] attributeExpressionExecutors, ProcessingMode processingMode, boolean outputExpectsExpiredEvents, ConfigReader configReader, SiddhiQueryContext siddhiQueryContext)	The initialization method for FunctionExecutor
Object	processAdd(Object[] data, io.siddhi.core.query.selector.attribute.aggregator.DistinctCountAttributeAggregatorExecutor.AggregatorState state)
Object	processAdd(Object data, io.siddhi.core.query.selector.attribute.aggregator.DistinctCountAttributeAggregatorExecutor.AggregatorState state)
Object	processRemove(Object[] data, io.siddhi.core.query.selector.attribute.aggregator.DistinctCountAttributeAggregatorExecutor.AggregatorState state)
Object	processRemove(Object data, io.siddhi.core.query.selector.attribute.aggregator.DistinctCountAttributeAggregatorExecutor.AggregatorState state)
Object	reset(io.siddhi.core.query.selector.attribute.aggregator.DistinctCountAttributeAggregatorExecutor.AggregatorState state)

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

execute, initAggregator

Methods inherited from class java.lang.Object

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

Constructor Detail

DistinctCountAttributeAggregatorExecutor

public DistinctCountAttributeAggregatorExecutor()

Method Detail

init

protected StateFactory<io.siddhi.core.query.selector.attribute.aggregator.DistinctCountAttributeAggregatorExecutor.AggregatorState> init(ExpressionExecutor[] attributeExpressionExecutors,
                                                                                                                                         ProcessingMode processingMode,
                                                                                                                                         boolean outputExpectsExpiredEvents,
                                                                                                                                         ConfigReader configReader,
                                                                                                                                         SiddhiQueryContext siddhiQueryContext)

The initialization method for FunctionExecutor

Specified by:

init in class AttributeAggregatorExecutor<io.siddhi.core.query.selector.attribute.aggregator.DistinctCountAttributeAggregatorExecutor.AggregatorState>

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 DistinctCountAttributeAggregatorExecutor configuration reader.

siddhiQueryContext - Siddhi query runtime context

getReturnType

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

processAdd

public Object processAdd(Object data,
                         io.siddhi.core.query.selector.attribute.aggregator.DistinctCountAttributeAggregatorExecutor.AggregatorState state)

Specified by:

processAdd in class AttributeAggregatorExecutor<io.siddhi.core.query.selector.attribute.aggregator.DistinctCountAttributeAggregatorExecutor.AggregatorState>

processAdd

public Object processAdd(Object[] data,
                         io.siddhi.core.query.selector.attribute.aggregator.DistinctCountAttributeAggregatorExecutor.AggregatorState state)

Specified by:

processAdd in class AttributeAggregatorExecutor<io.siddhi.core.query.selector.attribute.aggregator.DistinctCountAttributeAggregatorExecutor.AggregatorState>

processRemove

public Object processRemove(Object data,
                            io.siddhi.core.query.selector.attribute.aggregator.DistinctCountAttributeAggregatorExecutor.AggregatorState state)

Specified by:

processRemove in class AttributeAggregatorExecutor<io.siddhi.core.query.selector.attribute.aggregator.DistinctCountAttributeAggregatorExecutor.AggregatorState>

processRemove

public Object processRemove(Object[] data,
                            io.siddhi.core.query.selector.attribute.aggregator.DistinctCountAttributeAggregatorExecutor.AggregatorState state)

Specified by:

processRemove in class AttributeAggregatorExecutor<io.siddhi.core.query.selector.attribute.aggregator.DistinctCountAttributeAggregatorExecutor.AggregatorState>

reset

public Object reset(io.siddhi.core.query.selector.attribute.aggregator.DistinctCountAttributeAggregatorExecutor.AggregatorState state)

Specified by:

reset in class AttributeAggregatorExecutor<io.siddhi.core.query.selector.attribute.aggregator.DistinctCountAttributeAggregatorExecutor.AggregatorState>