CODEWITHSUNDEEP
design-patterns
user3227126
user3227126

Reputation: 239

What is pluggable adapter design pattern?

I am c++ developer and try to understand the design pattern .In structural pattern there is a specific pattern called adapter pattern.some how i understand this pattern from the GOF book.In this pattern ,there is pluggable adapter pattern,which very confusing and not able to understand it .Googled lot but not able to find a satisfactory answer.Can any one explain what is pluggable adapter design pattern ,with a c++ example ? and also the difference between normal adapter pattern and pluggable adapter pattern. Thanks in advance

Upvotes: 1

Views: 4487

Answers (1)

Mohit
Mohit

Reputation: 2110

The below example fulfill this condition:

adapter should support the adaptees(which are unrelated and have different interfaces) using the same old target interface known to the client.

This example uses C++11 lambda to implement the same functionality like delegates.

  #include <iostream>
  #include <functional>

  //Adaptee 1
  struct CoffeMaker {
    void Brew (double quantity, double temp) const{
     std::cout << "I am brewing " << quantity <<"ml coffee @" << temp <<" degree C" <<std::endl; 
   }
  };

  //Adaptee 2 (having difference interface from Adaptee 2)
  struct  JuiceMaker{
    void Squeeze (double quantity) const{
      std::cout << "I am making " << quantity <<"ml Juice" <<std::endl; 
   }
  };

  // Target
  struct Beverage{
    virtual void getBeverage (int quantity) = 0;
  };

  // Adapter
  class Adapter : public Beverage{
    std::function<void(int)> Request;

  public:
    Adapter(CoffeMaker *cm1){
      Request = [cm1](int quantity){
        cm1->Brew(quantity,80);
      };
      delete cm1;
    }

    Adapter(JuiceMaker *jm1){
      Request = [jm1](int quantity){
        jm1->Squeeze(quantity);
      };
      delete jm1;
    }

    void getBeverage(int quantity){
      Request(quantity);
    }
  };

  //Client
  int main(){
    Adapter adp1(new CoffeMaker());
    adp1.getBeverage(30);
    
    Adapter adp2(new JuiceMaker());
    adp2.getBeverage(40);

  }

Though this example is based on the this article but I have some objections in their pluggable adapter example

Upvotes: 1

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