AggregateLambdaFactory (Apache Calcite API)

Type Parameters:: TSource - Type of the enumerable input source; TOrigAccumulate - Type of the original accumulator; TAccumulate - Type of the varied accumulator; TResult - Type of the enumerable output result; TKey - Type of the group-by key

All Known Implementing Classes:: BasicAggregateLambdaFactory, LazyAggregateLambdaFactory

public interface AggregateLambdaFactory<TSource,TOrigAccumulate,TAccumulate,TResult,TKey>

Generates lambda functions used in EnumerableAggregate.

This interface allows a implicit accumulator type variation. (OAccumulate -> TAccumulate)

Method Summary

Modifier and Type

Method

Description

Function2<TAccumulate,TSource,TAccumulate>

accumulatorAdder()

Function0<TAccumulate>

accumulatorInitializer()

Function2<TKey,TAccumulate,TResult>

resultSelector(Function2<TKey,TOrigAccumulate,TResult> resultSelector)

Function1<TAccumulate,TResult>

singleGroupResultSelector(Function1<TOrigAccumulate,TResult> resultSelector)

Method Details
- accumulatorInitializer
  
  Function0<TAccumulate> accumulatorInitializer()
- accumulatorAdder
  
  Function2<TAccumulate,TSource,TAccumulate> accumulatorAdder()
- singleGroupResultSelector
  
  Function1<TAccumulate,TResult> singleGroupResultSelector(Function1<TOrigAccumulate,TResult> resultSelector)
- resultSelector
  
  Function2<TKey,TAccumulate,TResult> resultSelector(Function2<TKey,TOrigAccumulate,TResult> resultSelector)