meka.gui.choosers.ExtensionFileFilterComparator.java Source code

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Here is the source code for meka.gui.choosers.ExtensionFileFilterComparator.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/>.
 */

/**
 * ExtensionFileFilterComparator.java
 * Copyright (C) 2015 University of Waikato, Hamilton, NZ
 */

package meka.gui.choosers;

import weka.gui.ExtensionFileFilter;

import java.io.Serializable;
import java.util.Comparator;

/**
 * Comparator for file filters.
 *
 * @author FracPete (fracpete at waikato dot ac dot nz)
 * @version $Revision$
 */
public class ExtensionFileFilterComparator implements Serializable, Comparator<ExtensionFileFilter> {

    private static final long serialVersionUID = 6579446866620872706L;

    /**
     * Compares the two filters.
     *
     * @param o1        the first filter
     * @param o2        the second filter
     * @return          less than 0, 0, or greater than 0, if the first filter is less than,
     *                  equal, or greater than the second one
     */
    @Override
    public int compare(ExtensionFileFilter o1, ExtensionFileFilter o2) {
        int result;
        int i;

        result = 0;

        for (i = 0; i < o1.getExtensions().length && i < o2.getExtensions().length; i++) {
            result = o1.getExtensions()[i].compareTo(o2.getExtensions()[i]);
            if (result != 0)
                break;
        }

        if ((result == 0) && (o1.getExtensions().length != o2.getExtensions().length))
            result = new Integer(o1.getExtensions().length).compareTo(o2.getExtensions().length);

        return result;
    }
}