public class CustomComparator {

       public static integer compare(Object firstValue, Object secondValue){
             try
                {
             if(firstValue == null || secondValue == null) {
                 return null;
             }
             if(firstValue instanceof Date || secondValue instanceof Date) {

                    Date dateFirstValue = Date.valueOf(firstValue);
                    Date datesecondValue = Date.valueOf(secondValue);

                    if(dateFirstValue > datesecondValue){
                        return 1;
                    }else if(dateFirstValue < datesecondValue){
                        return -1;
                    }
                    return 0;
            }
            if(firstValue instanceof DateTime || secondValue instanceof DateTime) {

                    DateTime dateTimeFirstValue = DateTime.valueOf(firstValue);
                    DateTime dateTimesecondValue = DateTime.valueOf(secondValue);

                    if(dateTimeFirstValue > dateTimesecondValue){
                        return 1;
                    }else if(dateTimeFirstValue < dateTimesecondValue){
                        return -1;
                    }
                    return 0;
            }
             else{

                    Decimal decFirstValue = Decimal.valueOf(String.valueOf(firstValue));
                    Decimal decSecondValue =  Decimal.valueOf(String.valueOf(secondValue));

                    if(decFirstValue > decSecondValue){
                        return 1;
                    }else if(decFirstValue < decSecondValue){
                        return -1;
                    }
                    return 0;
                }
                }
                catch(Exception ex){
                            System.debug('Oh, shi~ Cast error');
                                return null;
                    }
            }
       }