com.helger.commons.aggregate

Interface IAggregator<SRCTYPE,DSTTYPE>

Type Parameters:

SRCTYPE - The input type.

DSTTYPE - The output type.

All Superinterfaces:

Function<Collection<SRCTYPE>,DSTTYPE>, IFunction<Collection<SRCTYPE>,DSTTYPE>, Serializable

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public interface IAggregator<SRCTYPE,DSTTYPE>
extends IFunction<Collection<SRCTYPE>,DSTTYPE>

Aggregate a list of input objects to a single output object (change n to 1).

Author:

Philip Helger

Method Summary

Modifier and Type	Method and Description
default DSTTYPE	apply(SRCTYPE... aObjects) Aggregate a array of input objects to a single output object.

Methods inherited from interface com.helger.commons.functional.IFunction

andThen, compose, identity

Methods inherited from interface java.util.function.Function

apply

Method Detail

apply

@Nullable
default DSTTYPE apply(@Nullable
                                 SRCTYPE... aObjects)

Aggregate a array of input objects to a single output object.

Parameters:

aObjects - Source object array. May not be null.

Returns:

The aggregated object. May be null.