// Some national prefixes are a substring of others. If extracting the shorter NDD doesn't result
// in a number we can format, we try to see if we can extract a longer version here.
private boolean ableToExtractLongerNdd()
{
if (nationalPrefixExtracted.length() > 0)
{
// Put the extracted NDD back to the national number before attempting to extract a new NDD.
nationalNumber.insert(0, nationalPrefixExtracted);
// Remove the previously extracted NDD from prefixBeforeNationalNumber. We cannot simply set
// it to empty string because people sometimes incorrectly enter national prefix after the
// country code, e.g. +44 (0)20-1234-5678.
int indexOfPreviousNdd = prefixBeforeNationalNumber.lastIndexOf(nationalPrefixExtracted);
prefixBeforeNationalNumber.setLength(indexOfPreviousNdd);
}
return(!nationalPrefixExtracted.equals(removeNationalPrefixFromNationalNumber()));
}
