Examples of com.ibm.icu.util.GlobalizationPreferences

com.ibm.icu.util.GlobalizationPreferences
This convenience class provides a mechanism for bundling together different globalization preferences. It includes:
- A list of locales/languages in preference order
- A territory
- A currency
- A timezone
- A calendar
- A collator (for language-sensitive sorting, searching, and matching).
- Explicit overrides for date/time formats, etc.
The class will heuristically compute implicit, heuristic values for the above based on available data if explicit values are not supplied. These implicit values can be presented to users for confirmation, or replacement if the values are incorrect.
To reset any explicit field so that it will get heuristic values, pass in null. For example, myPreferences.setLocale(null);
All of the heuristics can be customized by subclasses, by overriding getTerritory(), guessCollator(), etc.
The class also supplies display names for languages, scripts, territories, currencies, timezones, etc. These are computed according to the locale/language preference list. Thus, if the preference is Breton; French; English, then the display name for a language will be returned in Breton if available, otherwise in French if available, otherwise in English.
The codes used to reference territory, currency, etc. are as defined elsewhere in ICU, and are taken from CLDR (which reflects RFC 3066bis usage, ISO 4217, and the TZ Timezone database identifiers).
This is at a prototype stage, and has not incorporated all the design changes that we would like yet; further feedback is welcome.
Note:
- to get the display name for the first day of the week, use the calendar + display names.
- to get the work days, ask the calendar (when that is available).
- to get papersize / measurement system/bidi-orientation, ask the locale (when that is available there)
- to get the field order in a date, and whether a time is 24hour or not, ask the DateFormat (when that is available there)
- it will support HOST locale when it becomes available (it is a special locale that will ask the services to use the host platform's values).
@draft ICU 3.6 (retainAll) @provisional This API might change or be removed in a future release.

   * @return the sorted list of ULocale instances
   */
  @SuppressWarnings("unchecked")
  public static List<ULocale> getProcessedLocaleList(String[] locales){
    if (locales == null) return getDefaultLocaleList();
    GlobalizationPreferences prefs = new GlobalizationPreferences();
    
    ArrayList<ULocale> ulocales = new ArrayList<ULocale>();
    for (String locale:locales){
      if (locale != null){
        try {
          ULocale ulocale = ULocale.forLanguageTag(locale);
          if (!ulocale.getLanguage().equals(""))
            ulocales.add(ulocale);
        } catch (Exception e) {
          // There can be intermittent problems with the internal
          // functioning of the ULocale class with some
          // language tags; best to just log these and continue
          _logger.error("icu4j:ULocale.forLanguageTag("+locale+") threw Exception:",e);
        }
      }
    }  
    if (ulocales.isEmpty()) return getDefaultLocaleList();
    prefs.setLocales(ulocales.toArray(new ULocale[ulocales.size()]));
    return prefs.getLocales();
  }

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   * Gets the default locales list
   * @return a list of ULocale instances for the default locale
   */
  @SuppressWarnings("unchecked")
  protected static List<ULocale> getDefaultLocaleList(){
    GlobalizationPreferences prefs = new GlobalizationPreferences();
    return prefs.getLocales();
  }

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  @Test
  public void testProcessElementsByDefaultLocales() {
    // This will hopefully be independent of the real locale where the test
    // is run
    // Determine the "real" locales.
    GlobalizationPreferences prefs = new GlobalizationPreferences();
    ArrayList<ULocale> locales = (ArrayList<ULocale>)prefs.getLocales();
    assertNotNull("Locales array is not null", locales);


    // Set up a dummy list of strings. Last one will be the
    // correct one.
    LocalizedString[] elements = new LocalizedString[4];

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        assertEquals("Hello World", internationalString.getLocalizedString("en").getValue());
    }


    @Test
    public void defaultLocale() {
        GlobalizationPreferences prefs = new GlobalizationPreferences();


        InternationalString internationalString = new InternationalString();
        internationalString.setLocalizedString(new LocalizedString("Hello World", "en"));
        internationalString.setLocalizedString(new LocalizedString("Hallo Wereld", "nl"));
        internationalString.setLocalizedString(new LocalizedString("你好世界", "cn"));


        // The actual test depends on the system default locale
        String defaultLocale = prefs.getLocale(0).toLanguageTag();
        if (defaultLocale.contains("cn"))
            assertEquals("你好世界", internationalString.getDefaultLocalizedString().getValue());
        if (defaultLocale.equals("nl"))
            assertEquals("Hallo Wereld", internationalString.getDefaultLocalizedString().getValue());
        if (defaultLocale.contains("en"))

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     * @return
     */
    public static List<ULocale> getProcessedLocaleList(String[] locales) {
        if (locales == null)
            return getDefaultLocaleList();
        GlobalizationPreferences prefs = new GlobalizationPreferences();


        ArrayList<ULocale> ulocales = new ArrayList<ULocale>();
        for (String locale : locales) {
            if (locale != null) {
                try {
                    ULocale ulocale = ULocale.forLanguageTag(locale);
                    if (!ulocale.getLanguage().equals(""))
                        ulocales.add(ulocale);
                } catch (Exception e) {
                    // There can be intermittent problems with the internal
                    // functioning of the ULocale class with some
                    // language tags; best to just log these and continue
                    _logger.error("icu4j:ULocale.forLanguageTag(" + locale + ") threw Exception:", e);
                }
            }
        }
        if (ulocales.isEmpty())
            return getDefaultLocaleList();
        prefs.setLocales(ulocales.toArray(new ULocale[ulocales.size()]));
        return prefs.getLocales();
    }

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     * Gets the default locales list
     * 
     * @return
     */
    protected static List<ULocale> getDefaultLocaleList() {
        GlobalizationPreferences prefs = new GlobalizationPreferences();
        return prefs.getLocales();
    }

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   * @param locales
   * @return the sorted list of ULocale instances
   */
  public static List<ULocale> getProcessedLocaleList(String[] locales){
    if (locales == null) return getDefaultLocaleList();
    GlobalizationPreferences prefs = new GlobalizationPreferences();
    
    ArrayList<ULocale> ulocales = new ArrayList<ULocale>();
    for (String locale:locales){
      if (locale != null){
        try {
          ULocale ulocale = ULocale.forLanguageTag(locale);
          if (!ulocale.getLanguage().equals(""))
            ulocales.add(ulocale);
        } catch (Exception e) {
          // There can be intermittent problems with the internal
          // functioning of the ULocale class with some
          // language tags; best to just log these and continue
          _logger.error("icu4j:ULocale.forLanguageTag("+locale+") threw Exception:",e);
        }
      }
    }  
    if (ulocales.isEmpty()) return getDefaultLocaleList();
    prefs.setLocales(ulocales.toArray(new ULocale[ulocales.size()]));
    return prefs.getLocales();
  }

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  /**
   * Gets the default locales list
   * @return a list of ULocale instances for the default locale
   */
  protected static List<ULocale> getDefaultLocaleList(){
    GlobalizationPreferences prefs = new GlobalizationPreferences();
    return prefs.getLocales();
  }

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        String baseName = "com.ibm.icu.dev.data.resources.TestDataElements";
        ResourceBundle rb;


        logln("Get a resource bundle " + baseName + 
                " using GlobalizationPreferences initialized by locales - en_GB, en_US");
        GlobalizationPreferences gp = new GlobalizationPreferences();
        ULocale[] locales = new ULocale[2];
        locales[0] = new ULocale("en_GB");
        locales[1] = new ULocale("en_US");
        gp.setLocales(locales);


        try {
            rb = gp.getResourceBundle(baseName);
            String str = rb.getString("from_en_US");
            if (!str.equals("This data comes from en_US")) {
                errln("FAIL: from_en_US is not from en_US bundle");
            }
        } catch (MissingResourceException mre) {
            errln("FAIL: Missing resouces");
        }


        gp.reset();


        logln("Get a resource bundle " + baseName + 
        " using GlobalizationPreferences initialized by locales - ja, en_US_California");


        locales = new ULocale[2];
        locales[0] = new ULocale("ja");
        locales[1] = new ULocale("en_US_California");
        gp.setLocales(locales);
        
        try {
            rb = gp.getResourceBundle(baseName, Thread.currentThread().getContextClassLoader());
            String str = rb.getString("from_en_US");
            if (!str.equals("This data comes from en_US")) {
                errln("FAIL: from_en_US is not from en_US bundle");
            }
        } catch (MissingResourceException mre) {
            errln("FAIL: Missing resouces");
        }


        logln("Get a resource bundle which does not exist");
        boolean bException = false;
        try {
            rb = gp.getResourceBundle("foo.bar.XXX");
        } catch (MissingResourceException mre) {
            logln("Missing resource exception for getting resource bundle - foo.bar.XXX");
            bException = true;
        }
        if (!bException) {

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            errln("FAIL: MissingResourceException must be thrown for RB - foo.bar.XXX");
        }
    }


    public void TestTerritory() {
        GlobalizationPreferences gp = new GlobalizationPreferences();


        // Territory for unsupported language locale
        logln("Set locale - ang");
        gp.setLocale(new ULocale("ang"));
        String territory = gp.getTerritory();
        if (!territory.equals("US")) {
            errln("FAIL: Territory is " + territory + " - Expected: US");
        }


        // Territory for language only locale "fr"
        logln("Set locale - fr");
        gp.setLocale(new ULocale("fr"));
        territory = gp.getTerritory();
        if (!territory.equals("FR")) {
            errln("FAIL: Territory is " + territory + " - Expected: FR");
        }




        // Set explicity territory
        logln("Set explicit territory - CA");
        gp.setTerritory("CA");
        territory = gp.getTerritory();
        if (!territory.equals("CA")) {
            errln("FAIL: Territory is " + territory + " - Expected: CA");
        }


        // Freeze
        logln("Freeze this object");
        gp.freeze();
        
        boolean bFrozen = false;
        try {
            gp.setTerritory("FR");
        } catch (UnsupportedOperationException uoe) {
            logln("setTerritory is blocked");
            bFrozen = true;
        }
        if (!bFrozen) {
            errln("FAIL: setTerritory must be blocked after frozen");
        }
        territory = gp.getTerritory();
        if (!territory.equals("CA")) {
            errln("FAIL: Territory is not CA");
        }


        // Safe clone
        GlobalizationPreferences gp1 = (GlobalizationPreferences)gp.cloneAsThawed();
        territory = gp1.getTerritory();
        if (!territory.equals("CA")) {
            errln("FAIL: Territory is " + territory + " - Expected: CA");
        }


        gp1.reset();
        ULocale[] locales = new ULocale[2];
        locales[0] = new ULocale("ja");
        locales[1] = new ULocale("zh_Hant_TW");
 
        logln("Set locales - ja, zh_Hant_TW");
        gp1.setLocales(locales);


        territory = gp1.getTerritory();
        if (!territory.equals("TW")) {
            errln("FAIL: Territory is " + territory + " - Expected: TW");
        }
    }

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