adams.gui.visualization.debug.inspectionhandler.WekaEvaluation.java Source code

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Here is the source code for adams.gui.visualization.debug.inspectionhandler.WekaEvaluation.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 3 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, see <http://www.gnu.org/licenses/>.
 */

/**
 * WekaEvaluation.java
 * Copyright (C) 2017 University of Waikato, Hamilton, New Zealand
 */
package adams.gui.visualization.debug.inspectionhandler;

import adams.flow.core.EvaluationStatistic;
import adams.flow.core.Token;
import adams.flow.transformer.WekaEvaluationValues;
import nz.ac.waikato.cms.locator.ClassLocator;
import weka.classifiers.Evaluation;

import java.util.ArrayList;
import java.util.Hashtable;
import java.util.List;

/**
 * Provides further insight into an {@link Evaluation} object.
 *
 * @author  fracpete (fracpete at waikato dot ac dot nz)
 * @version $Revision$
 */
public class WekaEvaluation extends AbstractInspectionHandler {

    /**
     * Checks whether the handler can handle the specified class.
     *
     * @param cls      the class to check
     * @return      true if the handler can handle this type of object
     */
    @Override
    public boolean handles(Class cls) {
        return ClassLocator.isSubclass(Evaluation.class, cls);
    }

    /**
     * Returns further inspection values.
     *
     * @param obj      the object to further inspect
     * @return      the named inspected values
     */
    @Override
    public Hashtable<String, Object> inspect(Object obj) {
        Hashtable<String, Object> result;
        Evaluation eval;
        WekaEvaluationValues values;
        boolean numeric;
        boolean nominal;
        List<EvaluationStatistic> stats;
        String msg;
        Token token;

        result = new Hashtable<>();

        eval = (Evaluation) obj;

        result.put("header", eval.getHeader());
        result.put("predictions", eval.predictions());

        nominal = eval.getHeader().classAttribute().isNominal();
        numeric = eval.getHeader().classAttribute().isNumeric();
        stats = new ArrayList<>();
        for (EvaluationStatistic stat : EvaluationStatistic.values()) {
            if (nominal && stat.isOnlyNominal())
                stats.add(stat);
            else if (numeric && stat.isOnlyNumeric())
                stats.add(stat);
            else if (!stat.isOnlyNumeric() && !stat.isOnlyNominal())
                stats.add(stat);
        }
        values = new WekaEvaluationValues();
        values.setStatisticValues(stats.toArray(new EvaluationStatistic[stats.size()]));
        values.input(new Token(eval));
        msg = values.execute();
        if (msg == null) {
            token = values.output();
            if (token != null)
                result.put("statistics", token.getPayload());
        } else {
            System.err.println(getClass().getName() + ": Failed to extract statistics:\n" + msg);
        }

        return result;
    }
}