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| 1 | +#include <iostream> |
| 2 | +#include <string> |
| 3 | +#include <algorithm> |
| 4 | +/** |
| 5 | + * EN: Adapter Design Pattern |
| 6 | + * |
| 7 | + * Intent: Provides a unified interface that allows objects with incompatible |
| 8 | + * interfaces to collaborate. |
| 9 | + * |
| 10 | + * RU: Паттерн Адаптер |
| 11 | + * |
| 12 | + * Назначение: Позволяет объектам с несовместимыми интерфейсами работать вместе. |
| 13 | + */ |
| 14 | +/** |
| 15 | + * EN: The Target defines the domain-specific interface used by the client code. |
| 16 | + * |
| 17 | + * RU: Целевой класс объявляет интерфейс, с которым может работать клиентский |
| 18 | + * код. |
| 19 | + */ |
| 20 | +class Target |
| 21 | +{ |
| 22 | +public: |
| 23 | + virtual ~Target() = default; |
| 24 | + |
| 25 | + virtual std::string Request() const |
| 26 | + { |
| 27 | + return "Target: The default target's behavior."; |
| 28 | + } |
| 29 | +}; |
| 30 | +/** |
| 31 | + * EN: The Adaptee contains some useful behavior, but its interface is |
| 32 | + * incompatible with the existing client code. The Adaptee needs some adaptation |
| 33 | + * before the client code can use it. |
| 34 | + * |
| 35 | + * RU: Адаптируемый класс содержит некоторое полезное поведение, но его |
| 36 | + * интерфейс несовместим с существующим клиентским кодом. Адаптируемый класс |
| 37 | + * нуждается в некоторой доработке, прежде чем клиентский код сможет его |
| 38 | + * использовать. |
| 39 | + */ |
| 40 | +class Adaptee |
| 41 | +{ |
| 42 | +public: |
| 43 | + std::string SpecificRequest() const |
| 44 | + { |
| 45 | + return ".eetpadA eht fo roivaheb laicepS"; |
| 46 | + } |
| 47 | +}; |
| 48 | +/** |
| 49 | + * EN: The Adapter makes the Adaptee's interface compatible with the Target's |
| 50 | + * interface. |
| 51 | + * |
| 52 | + * RU: Адаптер делает интерфейс Адаптируемого класса совместимым с целевым |
| 53 | + * интерфейсом. |
| 54 | + */ |
| 55 | +class Adapter : public Target |
| 56 | +{ |
| 57 | +private: |
| 58 | + Adaptee *adaptee_; |
| 59 | + |
| 60 | +public: |
| 61 | + Adapter(Adaptee *adaptee) : adaptee_(adaptee) |
| 62 | + { |
| 63 | + } |
| 64 | + std::string Request() const override |
| 65 | + { |
| 66 | + std::string to_reverse = this->adaptee_->SpecificRequest(); |
| 67 | + std::reverse(to_reverse.begin(), to_reverse.end()); |
| 68 | + return "Adapter: (TRANSLATED) " + to_reverse; |
| 69 | + } |
| 70 | +}; |
| 71 | +/** |
| 72 | + * EN: The client code supports all classes that follow the Target interface. |
| 73 | + * |
| 74 | + * RU: Клиентский код поддерживает все классы, использующие целевой интерфейс. |
| 75 | + */ |
| 76 | +void ClientCode(const Target *target) |
| 77 | +{ |
| 78 | + std::cout << target->Request(); |
| 79 | +} |
| 80 | + |
| 81 | +int main() |
| 82 | +{ |
| 83 | + std::cout << "Client: I can work just fine with the Target objects:\n"; |
| 84 | + Target *target = new Target; |
| 85 | + ClientCode(target); |
| 86 | + std::cout << "\n\n"; |
| 87 | + Adaptee *adaptee = new Adaptee; |
| 88 | + std::cout << "Client: The Adaptee class has a weird interface. See, I don't understand it:\n"; |
| 89 | + std::cout << "Adaptee: " << adaptee->SpecificRequest(); |
| 90 | + std::cout << "\n\n"; |
| 91 | + std::cout << "Client: But I can work with it via the Adapter:\n"; |
| 92 | + Adapter *adapter = new Adapter(adaptee); |
| 93 | + ClientCode(adapter); |
| 94 | + std::cout << "\n"; |
| 95 | + |
| 96 | + delete target; |
| 97 | + delete adaptee; |
| 98 | + delete adapter; |
| 99 | + |
| 100 | + return 0; |
| 101 | +} |
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