设计模式05——原型模式

//prototype.cpp
//原型模式：用原型实例指定创建对象的种类，并且通过拷贝这些原型创建新的对象

#include "gtest/gtest.h"

class Prototype
{
public:
    Prototype() {}
    virtual ~Prototype() {}
    virtual Prototype* Clone() = 0;
};

class ConcretePrototype1 : public Prototype
{
public:
    ConcretePrototype1() : value(1) 
    {}

    ~ConcretePrototype1() {}

    Prototype* Clone()
    {
        return new ConcretePrototype1(*this);
    };

    int GetValue()
    {
        return value;
    }

private:
    int value;

};

TEST(Prototype,prototype)
{
    Prototype* p1 = new ConcretePrototype1();
    Prototype* p2 = p1->Clone();

    EXPECT_EQ(1,((ConcretePrototype1*)p2)->GetValue());

    delete p1;
    delete p2;
}