oracle.spatial.hadoop.vector.cluster.kmeans

Interface ClusterShapeGenerator

All Known Implementing Classes:

ConvexHullClusterShapeGenerator, DummyClusterShapeGenerator

public interface ClusterShapeGenerator

Component used to generate a cluster shape in the reduce phase when the cluster center is updated. The expected lifecycle is as follows: setup() //only once per instance clear() //once per cluster addMemberPoint() //once or more times per cluster setClusterCenter() //once per cluster generateShape() //once per cluster

Method Summary

Modifier and Type	Method and Description
void	addMemberPoint(double[] point) Adds the point of a cluster member.
void	clear() Clears the current status.
oracle.spatial.geometry.JGeometry	generateShape() Generates the current cluster shape.
void	setClusterCenter(double[] point) Sets the center point of the current cluster
void	setup(org.apache.hadoop.conf.Configuration conf) Perform initialization tasks.

Method Detail

setup

void setup(org.apache.hadoop.conf.Configuration conf)

Perform initialization tasks. This method is called only once per instance

Parameters:

conf - the job configuration

clear

void clear()

Clears the current status. It should be called between cluster shape generation sessions

setClusterCenter

void setClusterCenter(double[] point)

Sets the center point of the current cluster

Parameters:

point - point ordinates

addMemberPoint

void addMemberPoint(double[] point)

Adds the point of a cluster member. The point reference may be reused so the implemented may need to create a copy.

Parameters:

point - point ordinates

generateShape

oracle.spatial.geometry.JGeometry generateShape()

Generates the current cluster shape. The cluster center and the cluster members must have been set previously

Returns:

a JGeometry instance