72 lines
2.1 KiB
C++
72 lines
2.1 KiB
C++
#include "Car.hpp"
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#include "Truck.hpp"
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#include "Logger.hpp"
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#include "VehicleFactory.hpp"
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#include <iostream>
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#include <vector>
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void workOnCopy_naive(std::vector<Vehicle*> vehicles){
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std::vector<Vehicle*> tempVec;
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for (int i=0; i<vehicles.size(); i++){
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Vehicle * currentVehicle = vehicles[i];
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Car* carToCopy = dynamic_cast<Car*>(currentVehicle); // RTTI type check
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Truck* truckToCopy = dynamic_cast<Truck*>(currentVehicle);// may be nullptr
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if(carToCopy){
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tempVec.push_back(new Car(carToCopy->model(), carToCopy->maxWeight())); // type dependency to Car
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}else if(truckToCopy){
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tempVec.push_back(new Truck(truckToCopy->model(), truckToCopy->payload_kg())); // type dependecy
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}else{
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// TODO: what do we do here?
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// Did someone add a new class to the code base?
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return; // BUG: copies aren't free'd
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}
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}
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// work on copies ...
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// ...
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for(auto vehi : tempVec){
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std::cout << vehi->model() << " " << vehi->payload_kg() << " kg" << std::endl;
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}
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for (int i=0; i<tempVec.size(); i++){
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delete tempVec[i];
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}
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tempVec.clear();
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}
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void workOnCopy_smart(std::vector<Vehicle*> vehicles){ // uses RAII, virtual ctor
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class RAIIvector { // local RAII helper class
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public:
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std::vector<Vehicle*> tempVec;
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~RAIIvector(){
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for(auto vehi : tempVec){
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delete vehi;
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}
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tempVec.clear();
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}
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};
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RAIIvector rv;
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for(auto vehi : vehicles){
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rv.tempVec.push_back(vehi->clone());
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}
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// work on copies ...
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// ...
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for(auto vehi : rv.tempVec){
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std::cout << vehi->model() << " " << vehi->payload_kg() << " kg" << std::endl;
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}
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// compiler WILL invoke RAIIvector::~RAIIvector() here
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}
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int main(int argc, const char * argv[]) {
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std::vector<Vehicle*> vehicles;
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vehicles.push_back(vehicleForPayload("Volkswagen Golf", 900)); // use factory for construction
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vehicles.push_back(vehicleForPayload("Magirus Deutz", 18*1000));
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Logger::getInstance()->log("work naively", __FILE__, __LINE__);
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workOnCopy_naive(vehicles);
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Logger::getInstance()->log("work smartly", __FILE__, __LINE__);
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workOnCopy_smart(vehicles);
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return 0;
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}
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