/**
* Tries to load the bundle for a given locale, also loads the backup locales with the same
* language.
*
* @param baseName the raw bundle name, without locale qualifiers
* @param locale the locale
* @param classLoader the classloader
* @param wantBase whether a resource bundle made only from the base name (with no locale
* information attached) should be returned.
* @return the resource bundle if it was loaded, otherwise the backup
*/
private static ResourceBundle tryBundle(
String baseName, Locale locale, ClassLoader classLoader, boolean wantBase) {
String language = locale.getLanguage();
String country = locale.getCountry();
String variant = locale.getVariant();
int baseLen = baseName.length();
// Build up a CPStringBuilder containing the complete bundle name, fully
// qualified by locale.
CPStringBuilder sb = new CPStringBuilder(baseLen + variant.length() + 7);
sb.append(baseName);
if (language.length() > 0) {
sb.append('_');
sb.append(language);
if (country.length() > 0) {
sb.append('_');
sb.append(country);
if (variant.length() > 0) {
sb.append('_');
sb.append(variant);
}
}
}
// Now try to load bundles, starting with the most specialized name.
// Build up the parent chain as we go.
String bundleName = sb.toString();
ResourceBundle first = null; // The most specialized bundle.
ResourceBundle last = null; // The least specialized bundle.
while (true) {
ResourceBundle foundBundle = tryBundle(bundleName, classLoader);
if (foundBundle != null) {
if (first == null) first = foundBundle;
if (last != null) last.parent = foundBundle;
foundBundle.locale = locale;
last = foundBundle;
}
int idx = bundleName.lastIndexOf('_');
// Try the non-localized base name only if we already have a
// localized child bundle, or wantBase is true.
if (idx > baseLen || (idx == baseLen && (first != null || wantBase)))
bundleName = bundleName.substring(0, idx);
else break;
}
return first;
}
