Aggregator
constructor(aggregationHandler: AggregatorAggregationHandler<Value, Return>, inputHandler: AggregatorInputHandler<Value, Return>, multipleColumnsHandler: AggregatorMultipleColumnsHandler<Value, Return>, name: String, statisticsParameters: Map<String, Any>)
Type Parameters
Value
The non-null type of the values to be aggregated. The input can always have nulls, they are filtered out.
Return
The type of the resulting value. Can optionally be nullable.