1/* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache License, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 18package org.apache.commons.math.stat.clustering; 19 20import java.io.Serializable; 21import java.util.ArrayList; 22import java.util.List; 23 24/** 25 * Cluster holding a set of {@link Clusterable} points. 26 * @param <T> the type of points that can be clustered 27 * @version $Revision: 771076 $ $Date: 2009-05-03 18:28:48 +0200 (dim. 03 mai 2009) $ 28 * @since 2.0 29 */ 30public class Cluster<T extends Clusterable<T>> implements Serializable { 31 32 /** Serializable version identifier. */ 33 private static final long serialVersionUID = -3442297081515880464L; 34 35 /** The points contained in this cluster. */ 36 private final List<T> points; 37 38 /** Center of the cluster. */ 39 private final T center; 40 41 /** 42 * Build a cluster centered at a specified point. 43 * @param center the point which is to be the center of this cluster 44 */ 45 public Cluster(final T center) { 46 this.center = center; 47 points = new ArrayList<T>(); 48 } 49 50 /** 51 * Add a point to this cluster. 52 * @param point point to add 53 */ 54 public void addPoint(final T point) { 55 points.add(point); 56 } 57 58 /** 59 * Get the points contained in the cluster. 60 * @return points contained in the cluster 61 */ 62 public List<T> getPoints() { 63 return points; 64 } 65 66 /** 67 * Get the point chosen to be the center of this cluster. 68 * @return chosen cluster center 69 */ 70 public T getCenter() { 71 return center; 72 } 73 74} 75