package de.hsel.spm.baudas.analysis;

import org.jetbrains.annotations.Nullable;
import weka.core.Instances;
import weka.core.converters.CSVLoader;

import java.io.File;
import java.io.IOException;

/**
 * base interface for analysis
 *
 * @author Johannes Theiner
 * @version 0.1
 * @since 0.1
 * @param <T> Type the chosen analysis returns as a result
 */
public interface Analysis<T> {


    /**
     * loads data from csv file
     *
     * @param file File to analyze
     * @return loaded data in weka format
     */
    @Nullable
    default Instances load(File file) {
        CSVLoader loader = new CSVLoader();
        try {
            loader.setSource(file);
            return loader.getDataSet();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * result of the analysis
     *
     * @return result as T
     */
    T getResult();
}