/**
* Copyright (C) 2001-2017 by RapidMiner and the contributors
*
* Complete list of developers available at our web site:
*
* http://rapidminer.com
*
* This program is free software: you can redistribute it and/or modify it under the terms of the
* GNU Affero General Public License as published by the Free Software Foundation, either version 3
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License along with this program.
* If not, see http://www.gnu.org/licenses/.
*/
package com.rapidminer.tools.math.som;
import java.util.BitSet;
import java.util.Random;
import java.util.Vector;
/**
* The RandomDataContainer is an implementation of the KohonenTrainingsData interface, and therefor
* provides examples of data for a KohonenNet. The data is returned to the KohonenNet via an
* iterator, which shuffels the data examples.
*
* @author Sebastian Land
*/
public class RandomDataContainer implements KohonenTrainingsData {
private static final long serialVersionUID = -3565717014239190320L;
private Vector<double[]> data = new Vector<double[]>();
private Random generator;
private BitSet flag;
public void addData(double[] data) {
this.data.add(data);
}
@Override
public int countData() {
return data.size();
}
@Override
public double[] getNext() {
int chosen = -1;
while (chosen < 0) {
int dice = generator.nextInt(data.size());
if (!flag.get(dice)) {
flag.set(dice);
return (data.elementAt(dice));
}
}
return null;
}
@Override
public void reset() {
this.flag = new BitSet(data.size());
}
@Override
public void setRandomGenerator(Random generator) {
this.generator = generator;
}
@Override
public double[] get(int index) {
return data.elementAt(index);
}
}