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08_PTRN: Weitere Änderungen am Grundgerüst

This commit is contained in:
Johannes Theiner 2018-12-01 09:44:03 +01:00
parent dd69b74ea2
commit b37de1bd06
8 changed files with 91 additions and 90 deletions
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2
src/08_PTRN/CMakeLists.txt
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@ -1 +1 @@
add_executable(08_PTRN_MP MP/Money.cpp MP/Money.h MP/Currency.cpp MP/Currency.h MP/maín.cpp MP/BankAccount.cpp MP/BankAccount.h MP/Storage.cpp MP/Storage.h)
add_executable(08_PTRN_MP MP/Money.cpp MP/Money.h MP/Currency.cpp MP/Currency.h MP/main.cpp MP/BankAccount.cpp MP/BankAccount.h MP/Storage.cpp MP/Storage.h)

4
src/08_PTRN/MP/BankAccount.cpp
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@ -1,5 +1,7 @@
#include <utility>
#include <utility>
#include "BankAccount.h"
BankAccount::BankAccount(std::string owner, Money money) : owner(std::move(owner)), money(std::move(money)){}
BankAccount::BankAccount(std::string owner, Money money) : owner(std::move(owner)), money(money){}

2
src/08_PTRN/MP/BankAccount.h
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@ -12,7 +12,7 @@ private:
Money money;
public:
BankAccount(std::string owner, Money money);
BankAccount(std::string owner = "none", Money money = Money(0, Storage().USD));
};

1
src/08_PTRN/MP/Currency.h
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@ -10,6 +10,7 @@ public:
float rate;
Currency(std::string name, float rate);
bool operator==(Currency &currency);
};

6
src/08_PTRN/MP/Storage.h
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@ -9,8 +9,12 @@
class Storage {
public:
std::unordered_set<Currency> currencies;
std::unordered_map<std::string, BankAccount> accounts;
static const Currency USD = Currency("US Dollar", 1);
static const Currency EUR = Currency("Euro", 0.879699);
static const Currency GBP = Currency("British Pound", 0.783667);
static const Currency AUD = Currency("Australian Dollar", 1.36962);
static const Currency CAD = Currency("Canadian Dollar", 1.33023);
};

74
src/08_PTRN/MP/main.cpp
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@ -1,71 +1,13 @@
#include "Car.hpp"
#include "Truck.hpp"
#include "Logger.hpp"
#include "VehicleFactory.hpp"
#include <unordered_set>
#include <unordered_map>
#include <iostream>
#include <vector>
#include "Currency.h"
#include "BankAccount.h"
#include "Storage.h"
void workOnCopy_naive(std::vector<Vehicle*> vehicles){
std::vector<Vehicle*> tempVec;
for (int i=0; i<vehicles.size(); i++){
Vehicle * currentVehicle = vehicles[i];
Car* carToCopy = dynamic_cast<Car*>(currentVehicle); // RTTI type check
Truck* truckToCopy = dynamic_cast<Truck*>(currentVehicle);// may be nullptr
if(carToCopy){
tempVec.push_back(new Car(carToCopy->model(), carToCopy->maxWeight())); // type dependency to Car
}else if(truckToCopy){
tempVec.push_back(new Truck(truckToCopy->model(), truckToCopy->payload_kg())); // type dependecy
}else{
// TODO: what do we do here?
// Did someone add a new class to the code base?
return; // BUG: copies aren't free'd
}
}
// work on copies ...
// ...
for(auto vehi : tempVec){
std::cout << vehi->model() << " " << vehi->payload_kg() << " kg" << std::endl;
}
for (int i=0; i<tempVec.size(); i++){
delete tempVec[i];
}
tempVec.clear();
}
Storage storage;
void workOnCopy_smart(std::vector<Vehicle*> vehicles){ // uses RAII, virtual ctor
int main(int argc, char **argv) {
class RAIIvector { // local RAII helper class
public:
std::vector<Vehicle*> tempVec;
~RAIIvector(){
for(auto vehi : tempVec){
delete vehi;
}
tempVec.clear();
}
};
RAIIvector rv;
for(auto vehi : vehicles){
rv.tempVec.push_back(vehi->clone());
}
// work on copies ...
// ...
for(auto vehi : rv.tempVec){
std::cout << vehi->model() << " " << vehi->payload_kg() << " kg" << std::endl;
}
// compiler WILL invoke RAIIvector::~RAIIvector() here
}
int main(int argc, const char * argv[]) {
std::vector<Vehicle*> vehicles;
vehicles.push_back(vehicleForPayload("Volkswagen Golf", 900)); // use factory for construction
vehicles.push_back(vehicleForPayload("Magirus Deutz", 18*1000));
Logger::getInstance()->log("work naively", __FILE__, __LINE__);
workOnCopy_naive(vehicles);
Logger::getInstance()->log("work smartly", __FILE__, __LINE__);
workOnCopy_smart(vehicles);
return 0;
storage.accounts.insert(BankAccount("Max Maier", Money(50, Storage().EUR)));
}

71
src/08_PTRN/MP/main_old.cpp Normal file
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@ -0,0 +1,71 @@
#include "Car.hpp"
#include "Truck.hpp"
#include "Logger.hpp"
#include "VehicleFactory.hpp"
#include <iostream>
#include <vector>
void workOnCopy_naive(std::vector<Vehicle*> vehicles){
std::vector<Vehicle*> tempVec;
for (int i=0; i<vehicles.size(); i++){
Vehicle * currentVehicle = vehicles[i];
Car* carToCopy = dynamic_cast<Car*>(currentVehicle); // RTTI type check
Truck* truckToCopy = dynamic_cast<Truck*>(currentVehicle);// may be nullptr
if(carToCopy){
tempVec.push_back(new Car(carToCopy->model(), carToCopy->maxWeight())); // type dependency to Car
}else if(truckToCopy){
tempVec.push_back(new Truck(truckToCopy->model(), truckToCopy->payload_kg())); // type dependecy
}else{
// TODO: what do we do here?
// Did someone add a new class to the code base?
return; // BUG: copies aren't free'd
}
}
// work on copies ...
// ...
for(auto vehi : tempVec){
std::cout << vehi->model() << " " << vehi->payload_kg() << " kg" << std::endl;
}
for (int i=0; i<tempVec.size(); i++){
delete tempVec[i];
}
tempVec.clear();
}
void workOnCopy_smart(std::vector<Vehicle*> vehicles){ // uses RAII, virtual ctor
class RAIIvector { // local RAII helper class
public:
std::vector<Vehicle*> tempVec;
~RAIIvector(){
for(auto vehi : tempVec){
delete vehi;
}
tempVec.clear();
}
};
RAIIvector rv;
for(auto vehi : vehicles){
rv.tempVec.push_back(vehi->clone());
}
// work on copies ...
// ...
for(auto vehi : rv.tempVec){
std::cout << vehi->model() << " " << vehi->payload_kg() << " kg" << std::endl;
}
// compiler WILL invoke RAIIvector::~RAIIvector() here
}
int main(int argc, const char * argv[]) {
std::vector<Vehicle*> vehicles;
vehicles.push_back(vehicleForPayload("Volkswagen Golf", 900)); // use factory for construction
vehicles.push_back(vehicleForPayload("Magirus Deutz", 18*1000));
Logger::getInstance()->log("work naively", __FILE__, __LINE__);
workOnCopy_naive(vehicles);
Logger::getInstance()->log("work smartly", __FILE__, __LINE__);
workOnCopy_smart(vehicles);
return 0;
}

19
src/08_PTRN/MP/maín.cpp
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@ -1,19 +0,0 @@
#include <unordered_set>
#include <unordered_map>
#include "Currency.h"
#include "BankAccount.h"
#include "Storage.h"
Storage storage;
int main(int argc, char **argv) {
storage.currencies.insert("USD", Currency("US Dollar", 1));
storage.currencies.insert("EUR", Currency("Euro", 0.879699));
storage.currencies.insert("GBP", Currency("British Pound", 0.783667));
storage.currencies.insert("AUD", Currency("Australian Dollar", 1.36962));
storage.currencies.insert("CAD", Currency("Canadian Dollar", 1.33023));
storage.accounts.insert(BankAccount("Max Maier", Money(50, storage.currencies["EUR"])));
}