org.gcaldaemon.gui.Messages.java Source code

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Here is the source code for org.gcaldaemon.gui.Messages.java

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//
// GCALDaemon is an OS-independent Java program that offers two-way
// synchronization between Google Calendar and various iCalalendar (RFC 2445)
// compatible calendar applications (Sunbird, Rainlendar, iCal, Lightning, etc).
//
// Apache License
// Version 2.0, January 2004
// http://www.apache.org/licenses/
// 
// Project home:
// http://gcaldaemon.sourceforge.net
//
package org.gcaldaemon.gui;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.util.Arrays;
import java.util.Enumeration;
import java.util.LinkedList;
import java.util.Locale;
import java.util.MissingResourceException;
import java.util.PropertyResourceBundle;
import java.util.ResourceBundle;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * Message bundle handler.
 * 
 * Created: Apr 16, 2007 12:50:56 PM
 * 
 * @author Andras Berkes
 */
public class Messages {

    // --- BUILT-IN RESOURCE BUNDLE ---

    private static final String BUNDLE_NAME = "org.gcaldaemon.gui.messages"; //$NON-NLS-1$
    private static final ResourceBundle DEFAULT_RESOURCE_BUNDLE = ResourceBundle.getBundle(BUNDLE_NAME);

    // --- SELECTED RESOURCE BUNDLE ---

    private static ResourceBundle userResourceBundle;
    private static Locale userLocale = Locale.ENGLISH;

    // --- LOGGER ---

    private static final Log log = LogFactory.getLog(Messages.class);

    // --- PRIVATE CONSTRUCTOR ---

    private Messages() {
    }

    // --- GLOBAL MESSAGE HANDLER ---

    public static final String getString(String key) {
        if (userResourceBundle != null) {
            try {
                return userResourceBundle.getString(key);
            } catch (MissingResourceException ignored) {
            }
        }
        try {
            return DEFAULT_RESOURCE_BUNDLE.getString(key);
        } catch (MissingResourceException undefined) {
            return '!' + key + '!';
        }
    }

    public static final boolean setUserLocale(Locale locale) {
        try {
            userResourceBundle = null;
            String programDir = System.getProperty("gcaldaemon.program.dir", "/Progra~1/GCALDaemon");
            File langDir = new File(programDir, "lang");
            if (!langDir.isDirectory()) {
                langDir.mkdir();
                return false;
            }
            File msgFile = new File(langDir, "messages-" + locale.getLanguage().toLowerCase() + ".txt");
            if (!msgFile.isFile()) {
                return false;
            }
            InputStream in = new BufferedInputStream(new FileInputStream(msgFile));
            userResourceBundle = new PropertyResourceBundle(in);
            in.close();
            userLocale = locale;
            Locale.setDefault(locale);
            return true;
        } catch (Exception ignored) {
            log.error("Unable to load messages!", ignored);
        }
        return false;
    }

    public static final Locale getUserLocale() {
        return userLocale;
    }

    public static final Locale[] getAvailableLocales() {
        LinkedList list = new LinkedList();
        list.addLast(Locale.ENGLISH);
        try {
            Locale[] availables = Locale.getAvailableLocales();
            String programDir = System.getProperty("gcaldaemon.program.dir", "/Progra~1/GCALDaemon");
            File langDir = new File(programDir, "lang");
            if (langDir.isDirectory()) {
                String[] names = langDir.list();
                String name;
                int s, e;
                for (int i = 0; i < names.length; i++) {
                    name = names[i];
                    if (name.equals("messages-en.txt")) {
                        continue;
                    }
                    s = name.indexOf('-');
                    e = name.indexOf('.', s);
                    if (s != -1 && e != -1) {
                        name = name.substring(s + 1, e);
                        Locale locale = null;
                        for (s = 0; s < availables.length; s++) {
                            if (name.equals(availables[s].getCountry().toLowerCase())) {
                                locale = availables[s];
                                break;
                            }
                        }
                        if (locale == null) {
                            locale = new Locale(name);
                        }
                        list.add(locale);
                    }
                }
            }
        } catch (Exception ignored) {
            log.warn(ignored);
        }
        Locale[] array = new Locale[list.size()];
        list.toArray(array);
        return array;
    }

    public static final String[][] getTranslatorTable(Locale locale) {
        Enumeration keyEnumerator = DEFAULT_RESOURCE_BUNDLE.getKeys();
        LinkedList list = new LinkedList();
        while (keyEnumerator.hasMoreElements()) {
            list.addLast(keyEnumerator.nextElement());
        }
        String[] keys = new String[list.size()];
        list.toArray(keys);
        Arrays.sort(keys, String.CASE_INSENSITIVE_ORDER);
        String[][] data = new String[keys.length][3];
        PropertyResourceBundle localeBundle = null;
        try {
            String programDir = System.getProperty("gcaldaemon.program.dir", "/Progra~1/GCALDaemon");
            File langDir = new File(programDir, "lang");
            if (!langDir.isDirectory()) {
                langDir.mkdir();
            } else {
                File msgFile = new File(langDir, "messages-" + locale.getLanguage().toLowerCase() + ".txt");
                if (msgFile.isFile()) {
                    InputStream in = new BufferedInputStream(new FileInputStream(msgFile));
                    localeBundle = new PropertyResourceBundle(in);
                    in.close();
                }
            }
        } catch (Exception ignored) {
            log.warn("Unable to load messages!", ignored);
        }
        for (int i = 0; i < keys.length; i++) {
            data[i][0] = keys[i];
            data[i][1] = DEFAULT_RESOURCE_BUNDLE.getString(keys[i]);
            if (localeBundle != null) {
                try {
                    data[i][2] = localeBundle.getString(keys[i]);
                } catch (Exception ignored) {
                }
            }
            if (data[i][2] == null) {
                data[i][2] = data[i][1];
            }
        }
        return data;
    }

}