I'm writing my simple database which reads the Person class fields from a csv file and writes them to a vector. But if in the future I want to add new fields to the Person class, I will have to redo the class constructor, in the function of reading and writing the csv file, I will also have to change the constructor. Is it possible to somehow add fields to the Person class with minimal code changes?
Person class:
person::person(unsigned int _id, std::string &_fullname, std::string &_occupation)
: id(_id), fullname(_fullname), occupation(_occupation) {
}
unsigned int person::getId() const {
return id;
}
const std::string &person::getFullname() const {
return fullname;
}
const std::string &person::getOccupation() const {
return occupation;
}
void person::setOccupation(std::string &_occupation) {
person::occupation = _occupation;
}
person_csv_converter class:
person_csv_converter::person_csv_converter(const std::string &_csvFilename) {
in.open(_csvFilename);
if (in.is_open()) {
std::cout << "CSV file was found!";
} else {
throw file_not_found_exception("File was not found or file type is incorrect!");
}
}
person_csv_converter::~person_csv_converter() {
in.close();
}
std::vector<std::string> person_csv_converter::readLines() {
std::string line;
std::vector<std::string> lines;
while (std::getline(in, line)) {
lines.push_back(line);
}
return lines;
}
std::vector<person> person_csv_converter::convert(const std::vector<std::string> &_csvLines) {
std::vector<person> persons;
//pseudo code:
/*
* for i in range(_csvLines.size()) {
* vector.append(new person(_csvLines.split(",")))
* }
*/
}
As a solution, I can suggest using a map instead of fields, which will contain <field, value> pairs, and at the time of reading the csv file, instead of the constructor, call the setter. Maybe there is something else?
