How to use

parts

method

in

com.google.common.net.InternetDomainName

public synchronized String getShortName() {
 if (_shortName == null) {
  String shortHostName;
  try {
   InternetDomainName domainName = InternetDomainName.from(_hostName);
   shortHostName = domainName.parts().get(0);
  } catch (Exception e) {
   shortHostName = _hostName;
  }
  if (_tableType == TableType.OFFLINE) {
   _shortName = shortHostName + SHORT_OFFLINE_SUFFIX;
  } else {
   _shortName = shortHostName + SHORT_REALTIME_SUFFIX;
  }
 }
 return _shortName;
}

/**
 * As per <a href="https://tools.ietf.org/html/rfc952">RFC-952</a> domain names should begin with a letter.
 * That said, <a href="https://tools.ietf.org/html/rfc1123#page-13">RFC-1123</a> updated it say that it may also begin
 * with a digit. Indeed, <a href="http://9292.nl/">this</a> is a valid domain name. Only the top-level domain (i.e. the
 * last portion) has to be non-numeric. More clarification on this matter is in
 * <a href="https://tools.ietf.org/html/rfc3696#section-2">RFC-3696</a>
 *
 * A potentially faster solution is
 *
 * if (first char is a digit) {
 *   it is probably ipv4;
 *   return name;
 * } else {
 *   it could be ipv6 (in which case no dots), or a hostname
 *   return substring before the first dot.
 * }
 *
 * It will fail if there are host names starting with a digit, but will work right otherwise.
 */
private String makeShortHostName(final String name) {
 try {
  InternetDomainName domainName = InternetDomainName.from(name);
  return domainName.parts().get(0);
 } catch (Exception e) {
  return name;
 }
}

String ret = idn.publicSuffix().toString();
if(ret.startsWith("InternetDomainName")) {
 return Joiner.on(".").join(idn.publicSuffix().parts());

 Set<String> nonePublicDomainParts(String uriHost) {
  InternetDomainName fullDomainName = InternetDomainName.from(uriHost);
  InternetDomainName publicDomainName = fullDomainName.publicSuffix();
  Set<String> nonePublicParts = new HashSet<String>(fullDomainName.parts());
  nonePublicParts.removeAll(publicDomainName.parts());
  return nonePublicParts;
}

 public static String getTopLevelDomain(String uri) {

InternetDomainName fullDomainName = InternetDomainName.from(uri);
InternetDomainName publicDomainName = fullDomainName.topPrivateDomain();
String topDomain = "";

Iterator<String> it = publicDomainName.parts().iterator();
while(it.hasNext()){
  String part = it.next();
  if(!topDomain.isEmpty())topDomain += ".";
  topDomain += part;
}
return topDomain;
}

private String extractCompanyFromHostName(String hostname) {
  try {
    InternetDomainName domainName = InternetDomainName.from(hostname);
    return Normalize.brand(domainName.topPrivateDomain().parts().get(0));
  } catch (RuntimeException e) {
    return null;
  }
}

public static String extractPublicSuffixFromHost( String host ) {
  if( host == null ) return null;
  // Parse out the public suffix:
  InternetDomainName domainName;
  try {
    domainName = InternetDomainName.from(host);
  } catch( Exception e ) {
    return null;
  }
  InternetDomainName suffix = null;
  if( host.endsWith(".uk")) {
    ImmutableList<String> parts = domainName.parts();
    if( parts.size() >= 2 ) {
      suffix = InternetDomainName.from(parts.get(parts.size() - 2)
          + "." + parts.get(parts.size() - 1));
    }
  } else {
    suffix = domainName.publicSuffix();
  }
  // Return a value:
  if( suffix == null ) return null;
  return suffix.toString();
}

public static String extractPublicSuffixFromHost( String host ) {
  if( host == null ) return null;
  // Parse out the public suffix:
  InternetDomainName domainName;
  try {
    domainName = InternetDomainName.from(host);
  } catch( Exception e ) {
    return null;
  }
  InternetDomainName suffix = null;
  if( host.endsWith(".uk")) {
    ImmutableList<String> parts = domainName.parts();
    if( parts.size() >= 2 ) {
      suffix = InternetDomainName.from(parts.get(parts.size() - 2)
          + "." + parts.get(parts.size() - 1));
    }
  } else {
    suffix = domainName.publicSuffix();
  }
  // Return a value:
  if( suffix == null ) return null;
  return suffix.toString();
}

  @Override
  public String apply(Endpoint input) {
   if (input.getRegion() != null)
     return input.getRegion();
   String host = input.getPublicURL().getHost();
   if (InternetDomainName.isValid(host)) {
     InternetDomainName domain = InternetDomainName.from(host);
     return domain.parts().get(0);
   }
   return provider;
  }
}

  @Override
  public String apply(Endpoint input) {
   if (input.getRegion() != null)
     return input.getRegion();
   String host = input.getPublicURL().getHost();
   if (InternetDomainName.isValid(host)) {
     InternetDomainName domain = InternetDomainName.from(host);
     return domain.parts().get(0);
   }
   return provider;
  }
}

  @Override
  public String apply(Endpoint input) {
   if (input.getRegion() != null)
     return input.getRegion();
   String host = input.getPublicURL().getHost();
   if (InternetDomainName.isValid(host)) {
     InternetDomainName domain = InternetDomainName.from(host);
     return domain.parts().get(0);
   }
   return provider;
  }
}

  @Override
  public String apply(Endpoint input) {
   if (input.getRegion() != null)
     return input.getRegion();
   String host = input.getPublicURL().getHost();
   if (InternetDomainName.isValid(host)) {
     InternetDomainName domain = InternetDomainName.from(host);
     return domain.parts().get(0);
   }
   return provider;
  }
}

ImmutableList<String> parts = domainName.parts();
if( parts.size() >= 3 ) {
  suffix = InternetDomainName.from(parts.get(parts.size() - 3)

ImmutableList<String> parts = domainName.parts();
if( parts.size() >= 3 ) {
  suffix = InternetDomainName.from(parts.get(parts.size() - 3)

InternetDomainName domainName = InternetDomainName.from(returnhost);
if (domainName.isTopPrivateDomain() || domainName.isUnderPublicSuffix()) {
  topDomain = DOT_JOINER.join(domainName.topPrivateDomain().parts());