Package org.apache.flink.api.common.functions

Interface Summary

Interface	Description
AggregateFunction<IN,ACC,OUT>	The AggregateFunction is a flexible aggregation function, characterized by the following features: The aggregates may use different types for input values, intermediate aggregates, and result type, to support a wide range of aggregation types.
Function	The base interface for all user-defined functions.
ReduceFunction<T>	Base interface for Reduce functions.