eu.linda.analytics.formats.ArffInputFormat.java Source code

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Here is the source code for eu.linda.analytics.formats.ArffInputFormat.java

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/*
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 */

package eu.linda.analytics.formats;

import eu.linda.analytics.model.Analytics;
import eu.linda.analytics.weka.utils.HelpfulFunctionsSingleton;
import java.util.AbstractList;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.rosuda.JRI.Rengine;
import weka.core.Instances;
import weka.core.converters.ConverterUtils;
import weka.filters.Filter;
import weka.filters.unsupervised.attribute.Remove;

/**
 *
 * @author eleni
 */
public class ArffInputFormat extends InputFormat {

    HelpfulFunctionsSingleton helpfulFuncions;

    public ArffInputFormat() {
        helpfulFuncions = HelpfulFunctionsSingleton.getInstance();
    }

    @Override
    public AbstractList importData4weka(String pathToFile, boolean isForRDFOutput, Analytics analytics) {

        helpfulFuncions.nicePrintMessage("import Arff file " + pathToFile);

        Instances data = null;
        //Instances newData = null;
        try {

            data = ConverterUtils.DataSource.read(pathToFile);

            //NominalToString filter1 = new NominalToString();
            //filter1.setInputFormat(data);
            //data = Filter.useFilter(data, filter1);

            /*/first 2 colums are metadata info used for rdf output
            if (excludeMetadataInfo) {
            String[] options = new String[2];
            options[0] = "-R";                                    // "range"
            options[1] = "1,2";                                     // first attribute
            Remove remove = new Remove();                         // new instance of filter
            remove.setOptions(options);                           // set options
            remove.setInputFormat(data);                          // inform filter about dataset **AFTER** setting options
            newData = Filter.useFilter(data, remove);   // apply filter                
            newData.setClassIndex(newData.numAttributes() - 1);
            return newData;
            }*/
            data.setClassIndex(data.numAttributes() - 1);

        } catch (Exception ex) {
            Logger.getLogger(ArffInputFormat.class.getName()).log(Level.SEVERE, null, ex);
        }
        return data;

    }

    @Override
    public Rengine importData4R(String pathToFile, boolean isForRDFOutput, Analytics analytics) {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }

}