Languages.java

/*******************************************************************************
 * Copyright (c) 2012-present Jakub Kováč, Jozef Brandýs, Katarína Kotrlová,
 * Pavol Lukča, Ladislav Pápay, Viktor Tomkovič, Tatiana Tóthová
 *
 * 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/>.
 ******************************************************************************/
package algvis.internationalization;

import java.util.LinkedList;
import java.util.List;
import java.util.Locale;
import java.util.MissingResourceException;
import java.util.ResourceBundle;

public class Languages {
    private static final int N = 2;
    private static int current_lang;
    private static final Locale[] all_locales = new Locale[N];
    private static final ResourceBundle[] all_msgs = new ResourceBundle[N];
    // private static Locale locale;
    // private static ResourceBundle msg;
    private static final List<LanguageListener> listeners = new LinkedList<LanguageListener>();

    static {
        all_locales[0] = new Locale("en");
        all_msgs[0] = ResourceBundle.getBundle("Messages", all_locales[0]);
        all_locales[1] = new Locale("sk");
        all_msgs[1] = ResourceBundle.getBundle("Messages", all_locales[1]);
    }

    public static void addListener(LanguageListener l) {
        Languages.listeners.add(l);
    }

    static void selectLanguage(int i) {
        if (i < 0 || i >= N) {
            i = 0;
        }
        current_lang = i;
        // locale = all_locales[current_lang];
        // msg = all_msgs[current_lang];
        // notify all listeners
        for (final LanguageListener l : listeners) {
            l.languageChanged();
        }
    }

    public static void selectLanguage(String s) {
        int i;
        if ("sk".equals(s)) {
            i = 1;
        } else {
            i = 0;
        }
        selectLanguage(i);
    }

    public static String getString(String s) {
        try {
            return all_msgs[current_lang].getString(s);
        } catch (final MissingResourceException e) {
            System.err.println(e.getMessage() + ": " + s);
            return "???";
        }
    }

    public static int getCurrentLanguage() {
        return current_lang;
    }
}