/*
* RapidMiner
*
* Copyright (C) 2001-2008 by Rapid-I and the contributors
*
* Complete list of developers available at our web site:
*
* http://rapid-i.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
* @version $Id: RandomDataContainer.java,v 1.3 2008/05/09 19:23:19 ingomierswa Exp $
*/
public class RandomDataContainer implements KohonenTrainingsData {
private Vector<double[]> data = new Vector<double[]>();
private Random generator;
private BitSet flag;
public void addData(double[] data) {
this.data.add(data);
}
public int countData() {
return data.size();
}
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;
}
public void reset() {
this.flag = new BitSet(data.size());
}
public void setRandomGenerator(Random generator) {
this.generator = generator;
}
public double[] get(int index) {
return data.elementAt(index);
}
}