klips/cpp/patterns/adapter/adapter.hpp

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2021-05-11 20:57:21 +00:00
#ifndef ADAPTER_HPP
#define ADAPTER_HPP
#include <random>
// Target implementation to adapt to a new interface
class Add {
public:
virtual ~Add() = default;
virtual int doMath(const int &a, const int &b) const { return a + b;}
};
// An adaptee with some useful behavior to adapt to our Add target
class RandomNumber {
public:
explicit RandomNumber(const int &max) : maxNum(max) { srand(time(nullptr));}
int getRandom() const { return rand() % maxNum;}
private:
int maxNum;
};
// An adapter that combines behaviors of Add and RandomNumber
class RandomAddAdapter : public Add {
public:
explicit RandomAddAdapter(RandomNumber *random_) : random(random_) {}
int doMath(const int &a, const int &b) const override { return a + b + random->getRandom();}
private:
RandomNumber *random;
};
#endif // ADAPTER_HPP