meka.gui.explorer.classify.SaveModel.java Source code

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Here is the source code for meka.gui.explorer.classify.SaveModel.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/>.
 */

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

package meka.gui.explorer.classify;

import meka.gui.choosers.MekaFileChooser;
import meka.gui.core.ResultHistoryList;
import weka.core.SerializationHelper;
import weka.gui.ExtensionFileFilter;

import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;

/**
 * Allows the user to save the model.
 *
 * @author FracPete (fracpete at waikato dot ac dot nz)
 * @version $Revision$
 */
public class SaveModel extends AbstractClassifyResultHistoryPlugin {
    private static final long serialVersionUID = -1152575716154907544L;

    /** the key in the session for the filechooser. */
    public final static String KEY_FILECHOOSER = "filechooser";

    /**
     * Returns the group of the plugin. Used for the grouping the menu items.
     *
     * @return          the group
     */
    public String getGroup() {
        return "Model";
    }

    /**
     * Returns the name of the plugin. Used for the menu item text.
     *
     * @return          the name
     */
    @Override
    public String getName() {
        return "Save model...";
    }

    /**
     * Checks whether the current item can be handled. Disables/enables the menu item.
     *
     * @param history   the current history
     * @param index     the selected history item
     * @return          true if can be handled
     */
    @Override
    public boolean handles(ResultHistoryList history, int index) {
        return (history.getPayloadAt(index) != null);
    }

    /**
     * Returns the file chooser to use for the models.
     *
     * @return          the file chooser
     */
    protected MekaFileChooser getFileChooser() {
        MekaFileChooser result;
        ExtensionFileFilter filter;

        if (!hasSessionValue(KEY_FILECHOOSER)) {
            result = new MekaFileChooser();
            filter = new ExtensionFileFilter(".model", "Model file (*.model)");
            result.addChoosableFileFilter(filter);
            result.setFileFilter(filter);
            setSessionValue(KEY_FILECHOOSER, result);
        }

        return (MekaFileChooser) getSessionValue(KEY_FILECHOOSER);
    }

    /**
     * Returns the action lister to use in the menu.
     *
     * @param history   the current history
     * @param index     the selected history item
     * @return          the listener
     */
    @Override
    public ActionListener getActionListener(final ResultHistoryList history, final int index) {
        return new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                int retVal = getFileChooser().showSaveDialog(null);
                if (retVal != MekaFileChooser.APPROVE_OPTION)
                    return;
                File file = getFileChooser().getSelectedFile();
                try {
                    SerializationHelper.writeAll(file.getAbsolutePath(), (Object[]) history.getPayloadAt(index));
                } catch (Exception ex) {
                    String msg = "Failed to write model to '" + file + "'!";
                    System.err.println(msg);
                    ex.printStackTrace();
                    JOptionPane.showMessageDialog(null, msg + "\n" + e);
                }
            }
        };
    }
}