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

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Here is the source code for adams.gui.visualization.debug.inspectionhandler.WekaInstances.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/>.
 */

/**
 * WekaInstances.java
 * Copyright (C) 2012-2015 University of Waikato, Hamilton, New Zealand
 */
package adams.gui.visualization.debug.inspectionhandler;

import nz.ac.waikato.cms.locator.ClassLocator;
import weka.core.Instance;
import weka.core.Instances;

import java.util.Hashtable;

/**
 * Provides further insight into {@link Instance} and {@link Instances} objects.
 *
 * @author  fracpete (fracpete at waikato dot ac dot nz)
 * @version $Revision$
 */
public class WekaInstances 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.hasInterface(Instance.class, cls) || ClassLocator.isSubclass(Instances.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;
        Instances data;
        Instance inst;

        result = new Hashtable<String, Object>();

        if (obj instanceof Instances) {
            data = (Instances) obj;
            inst = null;
        } else {
            inst = (Instance) obj;
            data = inst.dataset();
        }

        result.put("relation", data.relationName());
        result.put("num attributes", data.numAttributes());
        result.put("class attribute", (data.classIndex() == -1) ? "-none-"
                : ((data.classIndex() + 1) + " (" + data.classAttribute().name() + ")"));
        if (inst == null) {
            result.put("num instances", data.numInstances());
            result.put("instances", data.toArray());
        }

        return result;
    }
}