org.apache.flink.examples.java.clustering

Class KMeans.CentroidAccumulator

java.lang.Object

org.apache.flink.examples.java.clustering.KMeans.CentroidAccumulator

All Implemented Interfaces:

Serializable, Function, ReduceFunction<Tuple3<Integer,KMeans.Point,Long>>

Enclosing class:

KMeans

public static final class KMeans.CentroidAccumulator
extends Object
implements ReduceFunction<Tuple3<Integer,KMeans.Point,Long>>

Sums and counts point coordinates.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
CentroidAccumulator()

Method Summary

Modifier and Type	Method and Description
Tuple3<Integer,KMeans.Point,Long>	reduce(Tuple3<Integer,KMeans.Point,Long> val1, Tuple3<Integer,KMeans.Point,Long> val2) The core method of ReduceFunction, combining two values into one value of the same type.

Methods inherited from class java.lang.Object

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

Constructor Detail

CentroidAccumulator

public CentroidAccumulator()

Method Detail

reduce

public Tuple3<Integer,KMeans.Point,Long> reduce(Tuple3<Integer,KMeans.Point,Long> val1,
                                                Tuple3<Integer,KMeans.Point,Long> val2)

Description copied from interface: ReduceFunction

The core method of ReduceFunction, combining two values into one value of the same type. The reduce function is consecutively applied to all values of a group until only a single value remains.

Specified by:

reduce in interface ReduceFunction<Tuple3<Integer,KMeans.Point,Long>>

Parameters:

val1 - The first value to combine.

val2 - The second value to combine.

Returns:

The combined value of both input values.