VarianceAggregateFactory (Eclipse RDF4J 4.2.4)

java.lang.Object
- org.eclipse.rdf4j.query.algebra.evaluation.function.aggregate.variance.VarianceAggregateFactory

All Implemented Interfaces:

AggregateFunctionFactory
```
@Experimental
public class VarianceAggregateFactory
extends Object
implements AggregateFunctionFactory
```
AggregateFunctionFactory implementation that provides AggregateFunction used for processing sample variance.

Author:

Tomas Kovachev t.kovachev1996@gmail.com

Constructor Summary

Constructors
Constructor Description

VarianceAggregateFactory()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`AggregateFunction`	`buildFunction(Function<BindingSet,Value> evaluationStep)`	Builds an aggregate function with input evaluation step
`AggregateCollector`	`getCollector()`
`String`	`getIri()`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - VarianceAggregateFactory
```
public VarianceAggregateFactory()
```
- Method Detail
  - getIri
```
public String getIri()
```
    Specified by:
    
    getIri in interface AggregateFunctionFactory
    
    Returns:
    
    the identifier associated with given function
  - buildFunction
```
public AggregateFunction buildFunction(Function<BindingSet,Value> evaluationStep)
```
    Description copied from interface: AggregateFunctionFactory
    
    Builds an aggregate function with input evaluation step
    
    Specified by:
    
    buildFunction in interface AggregateFunctionFactory
    
    Parameters:
    
    evaluationStep - used to process values from an iterator's binding set
    
    Returns:
    
    an aggregate function evaluator
  - getCollector
```
public AggregateCollector getCollector()
```
    Specified by:
    
    getCollector in interface AggregateFunctionFactory
    
    Returns:
    
    result collector associated with given function type