code: private boolean getRelative(int value)
     {
        boolean result;
        if (value < 0 || value >= RELATIVE_MAP.length)
        {
           result = false;
        }
        else
        {
           result = RELATIVE_MAP[value];
        }
  
        return result;
     }
docs: Determine if the exception is relative based on the recurrence type integer value.
  
  @param value integer value
  @return true if the recurrence is relative