BlackBerry - read custom ringtone name from address book contact list?

Actually I am assigning custom ringtone with contact number in a custom database contact list. Now I am having problem with the reading to that contact list. If anyone having any idea about this problem pls pls help.

UPDATE

public void showAddressBook() {
    try {
        ContactList contactList = (ContactList) PIM.getInstance()
                .openPIMList(PIM.CONTACT_LIST, PIM.READ_WRITE);
        Enumeration enumx = contactList.items();
        while (enumx.hasMoreElements()) {
            Contact c = (Contact) enumx.nextElement();
            int[] fieldIds = c.getFields();
            System.out.println("SHOW:" + c.EXTENDED_FIELD_MIN_VALUE);
            int id;
            for (int index = 0; index < fieldIds.length; ++index) {
                id = fieldIds[index];
                System.out.println(c.getPIMList().getFieldLabel(id)
                        + "==showAddressBook==" + fieldIds.length);
                if (c.getPIMList().getFieldDataType(id) == Contact.STRING) {
                    for (int j = 0; j < c.countValues(id); ++j) {
                        String value = c.getString(id, j);
                        System.out.println(c.getPIMList().getFieldLabel(id)
                                + "=" + value);
                    }
                }
            }
        }
    } catch (PIMException ex) {
        ex.printStackTrace();
    }
}

From stackoverflow

• There is no reference to Contact Custom Ringtone in RIM API documentation...

  This is not exposed in the Contact or BlackBerryContact class. There is no API to access the ring tone for a contact.
  Mark Sohm
  BlackBerry Development Advisor
  www.BlackBerryDeveloper.com

  BlackBerry Support Community Forums:Java Development:Re: Custom ringtone field in Contacts

  RockOn : Thanks for reply

  Max Gontar : You're welcome!