org.apache.flink.api.java.operators

Class DistinctOperator.DistinctFunction<T>

java.lang.Object

org.apache.flink.api.java.operators.DistinctOperator.DistinctFunction<T>

All Implemented Interfaces:

Serializable, Function, GroupCombineFunction<T,T>, GroupReduceFunction<T,T>

Enclosing class:

DistinctOperator<T>

@Internal
public static final class DistinctOperator.DistinctFunction<T>
extends Object
implements GroupReduceFunction<T,T>, GroupCombineFunction<T,T>

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
DistinctFunction()

Method Summary

Modifier and Type	Method and Description
void	combine(Iterable<T> values, Collector<T> out) The combine method, called (potentially multiple timed) with subgroups of elements.
void	reduce(Iterable<T> values, Collector<T> out) The reduce method.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DistinctFunction

public DistinctFunction()

Method Detail

reduce

public void reduce(Iterable<T> values,
                   Collector<T> out)

Description copied from interface: GroupReduceFunction

The reduce method. The function receives one call per group of elements.

Specified by:

reduce in interface GroupReduceFunction<T,T>

Parameters:

values - All records that belong to the given input key.

out - The collector to hand results to.

combine

public void combine(Iterable<T> values,
                    Collector<T> out)

Description copied from interface: GroupCombineFunction

The combine method, called (potentially multiple timed) with subgroups of elements.

Specified by:

combine in interface GroupCombineFunction<T,T>

Parameters:

values - The elements to be combined.

out - The collector to use to return values from the function.