C++设计模式浅识建造者模式

[code]class Builder;

//产品

class Product{

public:

    void AddPart(const char *info){

        m_PartInfoVec.push_back(info);

    }

    void ShowProduct(){

        for(std::vector<const char *>::iterator item = m_PartInfoVec.begin(); item != m_PartInfoVec.end(); ++item){

            std::cout << *item << std::endl;

        }

    }

private:

    std::vector<const char *> m_PartInfoVec;

};

//Builder建造者,统一抽象接口

class Builder{

public:

    virtual void BuildPartA(){}

    virtual void BuildPartB(){}

    virtual Product* GetProduct() { return NULL;}

};

//具体的被创建对象方法

class ConcreteBuilder:public Builder{

public:

    ConcreteBuilder(){ m_Product = new Product(); }

    void BuildPartA(){

        m_Product->AddPart("PartA completed");

    }

    void BuildPartB(){

        m_Product->AddPart("PartB q");

    }

    Product* GetProduct(){

        return m_Product;

    }

private:

    Product *m_Product;

};

//Director控制具体建造对象的创建

class Director{

public:

    Director(Builder *builder) { m_Builder = builder; }

    void CreateProduct(){

        m_Builder->BuildPartA();

        m_Builder->BuildPartB();

    }

private:

    Builder *m_Builder;

};

[code]int main(){

    Builder *builderObj =  new ConcreteBuilder();

    Director directorObj(builderObj);

    directorObj.CreateProduct();

    Product *productObj = builderObj->GetProduct();

    if(productObj == NULL)

    {

        return 0;

    }

    productObj->ShowProduct();

    delete productObj;

    productObj = NULL;

    delete builderObj;

    builderObj = NULL;

}