DistinctCountIncrementalAttributeAggregator (Siddhi Core 5.1.29 API)

java.lang.Object
- io.siddhi.core.query.selector.attribute.aggregator.incremental.IncrementalAttributeAggregator
- - io.siddhi.core.query.selector.attribute.aggregator.incremental.DistinctCountIncrementalAttributeAggregator

public class DistinctCountIncrementalAttributeAggregator
extends IncrementalAttributeAggregator

IncrementalAttributeAggregator to calculate count based on an event attribute.

Constructor Summary

Constructors
Constructor Description

DistinctCountIncrementalAttributeAggregator()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`io.siddhi.query.api.expression.Expression`	`aggregate()`
`io.siddhi.query.api.expression.Expression[]`	`getBaseAggregators()`
`io.siddhi.query.api.expression.Expression[]`	`getBaseAttributeInitialValues()`
`io.siddhi.query.api.definition.Attribute[]`	`getBaseAttributes()`
`io.siddhi.query.api.definition.Attribute.Type`	`getReturnType()`
`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
  - DistinctCountIncrementalAttributeAggregator
```
public DistinctCountIncrementalAttributeAggregator()
```
- Method Detail
  - init
```
public void init(String attributeName,
                 io.siddhi.query.api.definition.Attribute.Type attributeType)
```
    Specified by:
    
    init in class IncrementalAttributeAggregator
  - aggregate
```
public io.siddhi.query.api.expression.Expression aggregate()
```
    Specified by:
    
    aggregate in class IncrementalAttributeAggregator
  - getBaseAttributes
```
public io.siddhi.query.api.definition.Attribute[] getBaseAttributes()
```
    Specified by:
    
    getBaseAttributes in class IncrementalAttributeAggregator
  - getBaseAttributeInitialValues
```
public io.siddhi.query.api.expression.Expression[] getBaseAttributeInitialValues()
```
    Specified by:
    
    getBaseAttributeInitialValues in class IncrementalAttributeAggregator
  - getBaseAggregators
```
public io.siddhi.query.api.expression.Expression[] getBaseAggregators()
```
    Specified by:
    
    getBaseAggregators in class IncrementalAttributeAggregator
  - getReturnType
```
public io.siddhi.query.api.definition.Attribute.Type getReturnType()
```
    Specified by:
    
    getReturnType in class IncrementalAttributeAggregator