private boolean matchesEmergencyNumberHelper(String number, String regionCode,
boolean allowPrefixMatch)
{
number = PhoneNumberUtil.extractPossibleNumber(number);
if (PhoneNumberUtil.PLUS_CHARS_PATTERN.matcher(number).lookingAt())
{
// Returns false if the number starts with a plus sign. We don't believe dialing the country
// code before emergency numbers (e.g. +1911) works, but later, if that proves to work, we can
// add additional logic here to handle it.
return(false);
}
PhoneMetadata metadata = MetadataManager.getShortNumberMetadataForRegion(regionCode);
if (metadata == null || !metadata.hasEmergency())
{
return(false);
}
Pattern emergencyNumberPattern =
Pattern.compile(metadata.getEmergency().getNationalNumberPattern());
String normalizedNumber = PhoneNumberUtil.normalizeDigitsOnly(number);
// In Brazil and Chile, emergency numbers don't work when additional digits are appended.
return((!allowPrefixMatch || regionCode == "BR" || regionCode == "CL")
? emergencyNumberPattern.matcher(normalizedNumber).matches()
: emergencyNumberPattern.matcher(normalizedNumber).lookingAt());
}
