private static PrefixTimeZonesMap loadPrefixTimeZonesMapFromFile(String path) {
InputStream source = PhoneNumberToTimeZonesMapper.class.getResourceAsStream(path);
ObjectInputStream in = null;
PrefixTimeZonesMap map = new PrefixTimeZonesMap();
try {
in = new ObjectInputStream(source);
map.readExternal(in);
} catch (IOException e) {
LOGGER.log(Level.WARNING, e.toString());
} finally {
close(in);
}
return map;
}
/**
* Returns the list of time zones corresponding to the country calling code of {@code number}.
*
* @param number the phone number to look up
* @return the list of corresponding time zones or a single element list with the default unknown
* time zone if no other time zone was found
*/
private List<String> getCountryLevelTimeZonesforNumber(PhoneNumber number) {
List<String> timezones = prefixTimeZonesMap.lookupCountryLevelTimeZonesForNumber(number);
return Collections.unmodifiableList(timezones.isEmpty() ? UNKNOWN_TIME_ZONE_LIST : timezones);
}