source: trunk/CrossPare/src/de/ugoe/cs/cpdp/loader/ARFFLoader.java @ 14

package de.ugoe.cs.cpdp.loader;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;

import weka.core.Instances;

/**
 * Loads ARFF files and chooses the last attribute as class attribute.
 * 
 * @author Steffen Herbold
 */
public class ARFFLoader implements SingleVersionLoader {

        /*
         * (non-Javadoc)
         * 
         * @see de.ugoe.cs.cpdp.loader.SingleVersionLoader#load(java.io.File)
         */
        @Override
        public Instances load(File file) {
                BufferedReader reader;
                Instances data;
                try {
                        reader = new BufferedReader(new FileReader(file));
                        data = new Instances(reader);
                        reader.close();
                } catch (IOException e) {
                        throw new RuntimeException("error reading file: " + file.getName(), e);
                }

                // setting class attribute
                data.setClassIndex(data.numAttributes() - 1);

                return data;
        }

        /*
         * (non-Javadoc)
         * 
         * @see
         * de.ugoe.cs.cpdp.loader.SingleVersionLoader#filenameFilter(java.lang.String
         * )
         */
        @Override
        public boolean filenameFilter(String filename) {
                return filename.endsWith(".arff");
        }

}