entity.DatasetFileManager.java Source code

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Here is the source code for entity.DatasetFileManager.java

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/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package entity;

import weka.core.Instances;
import weka.core.converters.ConverterUtils.DataSource;

/**
 * This class manages the creation of weka Instances from a dataset file (arff or csv)
 * NOTE: the last attribute is (must be) the classification one (buggy/nonbuggy)
 * 
 * @author Edoardo Varasi
 * @email edoardo.varasi@gmail.com
 *
 */
public class DatasetFileManager {

    private boolean verbose = false;

    public Instances generateWekaInstancesForDataset(String datasetFilePath) {

        // datasource creation from file
        DataSource datasource = null;
        try {
            datasource = new DataSource(datasetFilePath);
        } catch (Exception e) {
            e.printStackTrace();
        }

        Instances instances = null;

        // instances creation from datasource
        try {
            instances = datasource.getDataSet();
        } catch (Exception e) {
            e.printStackTrace();
        }
        // last attribute is for classification
        instances.setClassIndex(instances.numAttributes() - 1);

        if (verbose)
            System.out.println("\nDataset:\n");
        if (verbose)
            System.out.println(instances);

        return instances;
    }

}