private static Locale parseLocale()

in src/main/java/org/apache/commons/lang3/LocaleUtils.java [272:295]

• 24 lines of code
• 13 McCabe index (conditional complexity)

    private static Locale parseLocale(final String str) {
        if (isISO639LanguageCode(str)) {
            return new Locale(str);
        }
        final int limit = 3;
        final char separator = str.indexOf(UNDERSCORE) != -1 ? UNDERSCORE : DASH;
        final String[] segments = str.split(String.valueOf(separator), 3);
        final String language = segments[0];
        if (segments.length == 2) {
            final String country = segments[1];
            if (isISO639LanguageCode(language) && isISO3166CountryCode(country) || isNumericAreaCode(country)) {
                return new Locale(language, country);
            }
        } else if (segments.length == limit) {
            final String country = segments[1];
            final String variant = segments[2];
            if (isISO639LanguageCode(language) &&
                    (country.isEmpty() || isISO3166CountryCode(country) || isNumericAreaCode(country)) &&
                    !variant.isEmpty()) {
                return new Locale(language, country, variant);
            }
        }
        throw new IllegalArgumentException("Invalid locale format: " + str);
    }