    001    /*
    002     * Licensed to the Apache Software Foundation (ASF) under one or more
    003     * contributor license agreements.  See the NOTICE file distributed with
    004     * this work for additional information regarding copyright ownership.
    005     * The ASF licenses this file to You under the Apache License, Version 2.0
    006     * (the "License"); you may not use this file except in compliance with
    007     * the License.  You may obtain a copy of the License at
    008     *
    009     *      http://www.apache.org/licenses/LICENSE-2.0
    010     *
    011     * Unless required by applicable law or agreed to in writing, software
    012     * distributed under the License is distributed on an "AS IS" BASIS,
    013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    014     * See the License for the specific language governing permissions and
    015     * limitations under the License.
    016     */
    017
    018    package org.apache.commons.math.stat.clustering;
    019
    020    import java.util.Collection;
    021
    022    /**
    023     * Interface for points that can be clustered together.
    024     * @param <T> the type of point that can be clustered
    025     * @version $Revision: 811685 $ $Date: 2009-09-05 19:36:48 +0200 (sam. 05 sept. 2009) $
    026     * @since 2.0
    027     */
    028    public interface Clusterable<T> {
    029
    030        /**
    031         * Returns the distance from the given point.
    032         *
    033         * @param p the point to compute the distance from
    034         * @return the distance from the given point
    035         */
    036        double distanceFrom(T p);
    037
    038        /**
    039         * Returns the centroid of the given Collection of points.
    040         *
    041         * @param p the Collection of points to compute the centroid of
    042         * @return the centroid of the given Collection of Points
    043         */
    044        T centroidOf(Collection<T> p);
    045
    046    }