samoa-api/src/main/java/org/apache/samoa/moa/cluster/Miniball.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.apache.samoa.moa.cluster;

import com.dreizak.miniball.model.PointSet;
import java.util.ArrayList;
import java.util.List;

public class Miniball {

  private int dimension;
  private com.dreizak.miniball.highdim.Miniball mb;
  private PointStorage pointSet;

  public Miniball(int dimension) {
    this.dimension = dimension;
  }

  void clear() {
    this.pointSet = new PointStorage(this.dimension);
  }

  void check_in(double[] array) {
    this.pointSet.add(array);
  }

  double[] center() {
    return this.mb.center();
  }

  double radius() {
    return this.mb.radius();
  }

  void build() {
    this.mb = new com.dreizak.miniball.highdim.Miniball(this.pointSet);
  }

  public class PointStorage implements PointSet {

    protected int dimension;
    protected List<double[]> L;

    public PointStorage(int dimension) {
      this.dimension = dimension;
      this.L = new ArrayList<>();
    }

    public void add(double[] array) {
      this.L.add(array);
    }

    public int size() {
      return L.size();
    }

    public int dimension() {
      return dimension;
    }

    public double coord(int point, int coordinate) {
      return L.get(point)[coordinate];
    }
  }
}