设计模式创建型 C++版本

一.Factory Method

http://www.cnblogs.com/Clingingboy/archive/2010/08/26/1809554.html

// 产品抽象类
class CProduct
{
public:
    CProduct()
    {
        theApp.Trace(_T("CProduct 构造"));
    };
    virtual ~CProduct()
    {
        theApp.Trace(_T("CProduct 析构"));
    };
    
    virtual void Operation() = 0;
};

// 创建者抽象类
class CCreator
{
public:
    CCreator()
    {
        theApp.Trace(_T("CCreator 构造"));
    };
    virtual ~CCreator()
    {
        theApp.Trace(_T("CCreator 析构"));
    };

    virtual CProduct* FactoryMethod() = 0;
    void Operation()
    {
        theApp.Trace(_T("CCreator::Operation()"));
        CProduct *pProduct = FactoryMethod();
        ASSERT(NULL != pProduct);
        pProduct->Operation();
        delete pProduct;
        pProduct = NULL;
    };
};

// 具体产品
class CConcreteProduct : public CProduct
{
public:
    CConcreteProduct()
    {
        theApp.Trace(_T("CConcreteProduct 构造"));
    };
    virtual ~CConcreteProduct()
    {
        theApp.Trace(_T("CConcreteProduct 析构"));
    };
    
    virtual void Operation()
    {
        theApp.Trace(_T("CConcreteProduct::Operation()"));
    };
};

// 具体创建者
class CConcreteCreator : public CCreator
{
public:
    CConcreteCreator()
    {
        theApp.Trace(_T("CConcreteCreator 构造"));
    };
    virtual ~CConcreteCreator()
    {
        theApp.Trace(_T("CConcreteCreator 析构"));
    };
    
    virtual CProduct* FactoryMethod()
    {
        return new CConcreteProduct;
    };
};

Test

// 由子类创建对象
CConcreteCreator oCreator;
oCreator.Operation();

二.AbstractFactory

http://www.cnblogs.com/Clingingboy/archive/2010/08/26/1809556.html

// 产品抽象类A
class CAbstractProductA
{
public:
    CAbstractProductA()
    {
        theApp.Trace(_T("CAbstractProductA 构造"));
    };
    virtual ~CAbstractProductA()
    {
        theApp.Trace(_T("CAbstractProductA 析构"));
    };

    virtual void Operation() = 0;
};

// 产品抽象类B
class CAbstractProductB
{
public:
    CAbstractProductB()
    {
        theApp.Trace(_T("CAbstractProductB 构造"));
    };
    virtual ~CAbstractProductB()
    {
        theApp.Trace(_T("CAbstractProductB 析构"));
    };

    virtual void Operation() = 0;
};

// 工厂抽象类
class CAbstractFactory
{
public:
    CAbstractFactory()
    {
        theApp.Trace(_T("CAbstractFactory 构造"));
    };
    virtual ~CAbstractFactory()
    {
        theApp.Trace(_T("CAbstractFactory 析构"));
    };

    virtual CAbstractProductA* CreateProductA() = 0;
    virtual CAbstractProductB* CreateProductB() = 0;
};

// 具体产品A1
class CProductA1 : public CAbstractProductA
{
public:
    CProductA1()
    {
        theApp.Trace(_T("CProductA1 构造"));
    };
    virtual ~CProductA1()
    {
        theApp.Trace(_T("CProductA1 析构"));
    };
    
    virtual void Operation()
    {
        theApp.Trace(_T("CProductA1::Operation()"));
    };
};

// 具体产品A2
class CProductA2 : public CAbstractProductA
{
public:
    CProductA2()
    {
        theApp.Trace(_T("CProductA2 构造"));
    };
    virtual ~CProductA2()
    {
        theApp.Trace(_T("CProductA2 析构"));
    };
    
    virtual void Operation()
    {
        theApp.Trace(_T("CProductA2::Operation()"));
    };
};

// 具体产品B1
class CProductB1 : public CAbstractProductB
{
public:
    CProductB1()
    {
        theApp.Trace(_T("CProductB1 构造"));
    };
    virtual ~CProductB1()
    {
        theApp.Trace(_T("CProductB1 析构"));
    };
    
    virtual void Operation()
    {
        theApp.Trace(_T("CProductB1::Operation()"));
    };
};

// 具体产品B2
class CProductB2 : public CAbstractProductB
{
public:
    CProductB2()
    {
        theApp.Trace(_T("CProductB2 构造"));
    };
    virtual ~CProductB2()
    {
        theApp.Trace(_T("CProductB2 析构"));
    };
    
    virtual void Operation()
    {
        theApp.Trace(_T("CProductB2::Operation()"));
    };
};

// 具体工厂1
class CConcreteFactory1 : public CAbstractFactory
{
public:
    CConcreteFactory1()
    {
        theApp.Trace(_T("CConcreteFactory1 构造"));
    };
    virtual ~CConcreteFactory1()
    {
        theApp.Trace(_T("CConcreteFactory1 析构"));
    };

    virtual CAbstractProductA* CreateProductA()
    {
        theApp.Trace(_T("CConcreteFactory1::CreateProductA()"));
        return new CProductA1;
    };
    virtual CAbstractProductB* CreateProductB()
    {
        theApp.Trace(_T("CConcreteFactory1::CreateProductB()"));
        return new CProductB1;
    };
};

// 具体工厂2
class CConcreteFactory2 : public CAbstractFactory
{
public:
    CConcreteFactory2()
    {
        theApp.Trace(_T("CConcreteFactory2 构造"));
    };
    virtual ~CConcreteFactory2()
    {
        theApp.Trace(_T("CConcreteFactory2 析构"));
    };
    
    virtual CAbstractProductA* CreateProductA()
    {
        theApp.Trace(_T("CConcreteFactory2::CreateProductA()"));
        return new CProductA2;
    };
    virtual CAbstractProductB* CreateProductB()
    {
        theApp.Trace(_T("CConcreteFactory2::CreateProductB()"));
        return new CProductB2;
    };
};

Test

// 创建一族对象
CAbstractProductA *pProductA = NULL;
CAbstractProductB *pProductB = NULL;

CConcreteFactory1 oFactory1;
pProductA = oFactory1.CreateProductA();
pProductB = oFactory1.CreateProductB();
ASSERT(NULL != pProductA && NULL != pProductB);
pProductA->Operation();
pProductB->Operation();
delete pProductA;
pProductA = NULL;
delete pProductB;
pProductB = NULL;

CConcreteFactory2 oFactory2;
pProductA = oFactory2.CreateProductA();
pProductB = oFactory2.CreateProductB();
ASSERT(NULL != pProductA && NULL != pProductB);
pProductA->Operation();
pProductB->Operation();
delete pProductA;
pProductA = NULL;
delete pProductB;
pProductB = NULL;

三.Builder

http://www.cnblogs.com/Clingingboy/archive/2010/08/26/1809558.html

// 生成器抽象类
class CBuilder
{
public:
    CBuilder()
    {
        theApp.Trace(_T("CBuilder 构造"));
    };
    virtual ~CBuilder()
    {
        theApp.Trace(_T("CBuilder 析构"));
    };

    virtual void BuildPart1() = 0;
    virtual void BuildPart2() = 0;
};

// 具体生成器类
class CConcreteBuilder : public CBuilder
{
public:
    CConcreteBuilder()
    {
        theApp.Trace(_T("CConcreteBuilder 构造"));
    };
    virtual ~CConcreteBuilder()
    {
        theApp.Trace(_T("CConcreteBuilder 析构"));
    };
    
    virtual void BuildPart1()
    {
        theApp.Trace(_T("CBuilder::BuildPart1()"));
    };
    virtual void BuildPart2()
    {
        theApp.Trace(_T("CBuilder::BuildPart2()"));
    };
};

// 控制器类
class CDirector
{
public:
    CDirector()
    {
        theApp.Trace(_T("CDirector 构造"));
    };
    virtual ~CDirector()
    {
        theApp.Trace(_T("CDirector 析构"));
    };
    
    void Construct(CBuilder &oBuilder)
    {
        theApp.Trace(_T("CDirector::Construct()"));
        oBuilder.BuildPart1();
        oBuilder.BuildPart2();
    };
};

Test

// 可以用于复杂对象的创建，所谓复杂是指步骤多、条件多等
CConcreteBuilder oBuilder;
CDirector oDirector;
oDirector.Construct(oBuilder);

四.Prototype

http://www.cnblogs.com/Clingingboy/archive/2010/08/26/1809549.html

// 原型抽象类
class CPrototype
{
public:
    CPrototype()
    {
        theApp.Trace(_T("CPrototype 构造"));
    };
    virtual ~CPrototype()
    {
        theApp.Trace(_T("CPrototype 析构"));
    };

    virtual CPrototype* Clone() = 0;
};

// 具体原型类1
class CConcretePrototype1 : public CPrototype
{
public:
    CConcretePrototype1()
    {
        theApp.Trace(_T("CConcretePrototype1 构造"));
    };
    virtual ~CConcretePrototype1()
    {
        theApp.Trace(_T("CConcretePrototype1 析构"));
    };
    
    virtual CPrototype* Clone()
    {
        theApp.Trace(_T("CConcretePrototype1::Clone()"));
        CConcretePrototype1 *pClone = new CConcretePrototype1;
        *pClone = *this;
        return pClone;
    };
};

// 具体原型类2
class CConcretePrototype2 : public CPrototype
{
public:
    CConcretePrototype2()
    {
        theApp.Trace(_T("CConcretePrototype2 构造"));
    };
    virtual ~CConcretePrototype2()
    {
        theApp.Trace(_T("CConcretePrototype2 析构"));
    };
    
    virtual CPrototype* Clone()
    {
        theApp.Trace(_T("CConcretePrototype2::Clone()"));
        CConcretePrototype2 *pClone = new CConcretePrototype2;
        *pClone = *this;
        return pClone;
    };
};

Test

// 通过拷贝创建新对象
CPrototype *pPrototype = new CConcretePrototype1;
CPrototype *pPrototypeClone = pPrototype->Clone();
delete pPrototype;
pPrototype = NULL;
delete pPrototypeClone;
pPrototypeClone = NULL;
CConcretePrototype2 oPrototype;
pPrototypeClone = oPrototype.Clone();
delete pPrototypeClone;
pPrototypeClone = NULL;

五.Singleton

http://www.cnblogs.com/Clingingboy/archive/2010/08/26/1809560.html

// 单件类
class CSingleton  
{
private:
    CSingleton()                                // 私有构造，防止外部创建实例
    {
        theApp.Trace(_T("CSingleton 构造"));
    };

public:
    virtual ~CSingleton() {};

    static CSingleton& GetInstance()            // 全局访问点
    {
        theApp.Trace(_T("CSingleton::GetInstance()"));
        static CSingleton s_oSingleton;            // 静态对象，保证只有一个实例
        return s_oSingleton;
    };

    void Operation()
    {
        theApp.Trace(_T("CSingleton::Operation()"));
    };
};

// 方便外部调用
#define theSingleton (CSingleton::GetInstance())

Test

// 可以取代全局变量，用到的时候才创建对象
theSingleton.Operation();
theSingleton.Operation();