internal static NumberingSystem LookupInstanceByLocale(LocaleLookupData localeLookupData)
{
ULocale locale = localeLookupData.locale;
ICUResourceBundle rb;
try
{
rb = (ICUResourceBundle)UResourceBundle.GetBundleInstance(ICUData.IcuBaseName, locale);
rb = rb.GetWithFallback("NumberElements");
}
catch (MissingManifestResourceException)
{
return(new NumberingSystem());
}
string numbersKeyword = localeLookupData.numbersKeyword;
string resolvedNumberingSystem = null;
for (; ;)
{
try
{
resolvedNumberingSystem = rb.GetStringWithFallback(numbersKeyword);
break;
}
catch (MissingManifestResourceException)
{ // Fall back behavior as defined in TR35
if (numbersKeyword.Equals("native") || numbersKeyword.Equals("finance"))
{
numbersKeyword = "default";
}
else if (numbersKeyword.Equals("traditional"))
{
numbersKeyword = "native";
}
else
{
break;
}
}
}
NumberingSystem ns = null;
if (resolvedNumberingSystem != null)
{
ns = GetInstanceByName(resolvedNumberingSystem);
}
if (ns == null)
{
ns = new NumberingSystem();
}
return(ns);
}
/// <summary>
/// Returns the default numbering system for the specified <see cref="ULocale"/>.
/// </summary>
/// <stable>ICU 4.2</stable>
public static NumberingSystem GetInstance(ULocale locale)
{
// Check for @numbers
bool nsResolved = true;
string numbersKeyword = locale.GetKeywordValue("numbers");
if (numbersKeyword != null)
{
foreach (string keyword in OTHER_NS_KEYWORDS)
{
if (numbersKeyword.Equals(keyword))
{
nsResolved = false;
break;
}
}
}
else
{
numbersKeyword = "default";
nsResolved = false;
}
if (nsResolved)
{
NumberingSystem ns = GetInstanceByName(numbersKeyword);
if (ns != null)
{
return(ns);
}
// If the @numbers keyword points to a bogus numbering system name,
// we return the default for the locale.
numbersKeyword = "default";
}
// Attempt to get the numbering system from the cache
string baseName = locale.GetBaseName();
// TODO: Caching by locale+numbersKeyword could yield a large cache.
// Try to load for each locale the mappings from OTHER_NS_KEYWORDS and default
// to real numbering system names; can we get those from supplemental data?
// Then look up those mappings for the locale and resolve the keyword.
string key = baseName + "@numbers=" + numbersKeyword;
LocaleLookupData localeLookupData = new LocaleLookupData(locale, numbersKeyword);
return(cachedLocaleData.GetOrCreate(key, (k) => LookupInstanceByLocale(localeLookupData)));
}
