/*
* Encog(tm) Core v3.4 - Java Version
* http://www.heatonresearch.com/encog/
* https://github.com/encog/encog-java-core
* Copyright 2008-2016 Heaton Research, Inc.
*
* Licensed 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.
*
* For more information on Heaton Research copyrights, licenses
* and trademarks visit:
* http://www.heatonresearch.com/copyright
*/
package org.encog.ensemble.data.factories;
import java.util.ArrayList;
import java.util.Random;
import org.encog.ensemble.data.EnsembleDataSet;
import org.encog.ml.data.MLDataPair;
public class NonResamplingDataSetFactory extends EnsembleDataSetFactory {
private ArrayList<MLDataPair> elementsLeft = new ArrayList<MLDataPair>();
public NonResamplingDataSetFactory(int dataSetSize) {
super(dataSetSize);
}
@Override
public void reload() {
elementsLeft.clear();
for (MLDataPair dp:dataSource) {
elementsLeft.add(dp);
}
}
@Override
public EnsembleDataSet getNewDataSet() {
Random generator = new Random();
EnsembleDataSet ds = new EnsembleDataSet(dataSource.getInputSize(), dataSource.getIdealSize());
for (int i = 0; i < (int) Math.min(dataSetSize,elementsLeft.size()); i++)
{
int candidate = generator.nextInt(elementsLeft.size());
ds.add(elementsLeft.remove(candidate));
}
return ds;
}
}