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Java example source code file (Cluster.java)

This example Java source code file (Cluster.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

arraylist, cluster, list, point, serializable, string, util

The Cluster.java Java example source code

/*
 *
 *  * Copyright 2015 Skymind,Inc.
 *  *
 *  *    Licensed under the Apache License, Version 2.0 (the "License");
 *  *    you may not use this file except in compliance with the License.
 *  *    You may obtain a copy of the License at
 *  *
 *  *        http://www.apache.org/licenses/LICENSE-2.0
 *  *
 *  *    Unless required by applicable law or agreed to in writing, software
 *  *    distributed under the License is distributed on an "AS IS" BASIS,
 *  *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  *    See the License for the specific language governing permissions and
 *  *    limitations under the License.
 *
 */

package org.deeplearning4j.clustering.cluster;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.UUID;

import java.io.Serializable;

import org.nd4j.linalg.factory.Nd4j;

public class Cluster implements Serializable {

	private String id = UUID.randomUUID().toString();
	private String label;

	private Point center;
	private List<Point>	points	= Collections.synchronizedList(new ArrayList());

	private String distanceFunction;

	public Cluster() {
		super();
	}

	public Cluster(Point center,String distanceFunction) {
		this.distanceFunction = distanceFunction;
		setCenter(center);
	}

	


	public double getDistanceToCenter(Point point) {
		return Nd4j.getExecutioner().execAndReturn(Nd4j.getOpFactory().createAccum(distanceFunction,center.getArray(),point.getArray())).currentResult().doubleValue();
    }

	public void addPoint(Point point) {
		addPoint(point, true);
	}

	public void addPoint(Point point, boolean moveClusterCenter) {
		if (moveClusterCenter) {
			center.getArray().muli(points.size()).addi(point.getArray()).divi(points.size() + 1);
		}
		getPoints().add(point);
	}

	public void removePoints() {
		if (getPoints() != null)
			getPoints().clear();
	}

	public boolean isEmpty() {
		return points == null || points.size() == 0;
	}

	public Point getPoint(String id) {
		for (Point point : points)
			if (id.equals(point.getId()))
				return point;
		return null;
	}

	public Point removePoint(String id) {
		Point removePoint = null;
		for (Point point : points)
			if (id.equals(point.getId()))
				removePoint = point;
		if (removePoint != null)
			points.remove(removePoint);
		return removePoint;
	}

	public Point getCenter() {
		return center;
	}

	public void setCenter(Point center) {
		this.center = center;
	}

	public List<Point> getPoints() {
		return points;
	}

	public void setPoints(List<Point> points) {
		this.points = points;
	}

	public String getId() {
		return id;
	}

	public void setId(String id) {
		this.id = id;
	}

	public String getLabel() {
		return label;
	}

	public void setLabel(String label) {
		this.label = label;
	}

}

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