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

Interface Function

All Superinterfaces:

Serializable

All Known Subinterfaces:

AggregateFunction<IN,ACC,OUT>, KeySelector<IN,KEY>, ReduceFunction<T>, WatermarkCombinationFunction

All Known Implementing Classes:

WatermarkCombinationFunction.BoolWatermarkCombinationFunction, WatermarkCombinationFunction.NumericWatermarkCombinationFunction

@Public
public interface Function
extends Serializable

The base interface for all user-defined functions.

This interface is empty in order to allow extending interfaces to be SAM (single abstract method) interfaces that can be implemented via Java 8 lambdas.