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xubo · Guest

In the object factory document, it always say " the implementation of
product also must register this function with the
productFactory..." for example I have a product named "grape"

// class declairation in grape.h
class grape: public fruit{
private:
.....
public:
__fastcall grape();

};

also, I have a object factory named "productFactory" which is defined as
Singleton.
// class declairation
class productFactory
{
public:
typedef fruit* (*CreateFruitCallBack)();
bool RegisterFruit(int fruitId, CreateFruitCallBack cFruitFn);
bool UnregisterFruit(int fruitId);
fruit* CreateFruit(int fruitId);
private:
.....
protected:
......
}

Now how can i implement the sentence of "the implementation of product also
must register this function with the
productFactory..." ? How can i create concrete product and register it
within class "grape"???
does it means that I should declair a function in the <grape.h> like this:?

class grape: public fruit{
private:
.....
public:
__fastcall grape();

};
fruit* getGrape(void);

???

// in the graph.cpp file
.....
fruit* getGrape()
{
return new grape;
}
......

The problem is still. How can i put the following registration code::::

<productFactory::Instance().RegisterFruit(10,getGrape);> ????

Remy Lebeau (TeamB) · Guest

"xubo" <xu (AT) bbn (DOT) cn> wrote

xubo · Guest

Sorry. my last question is where to put registration code
<productFactory::Instance().RegisterFruit(10,getGrape);> ???

the registration code can't put into function getGrape(void); If it is not
put in getGrape(), how can program execute this part of
code(productFactory::Instance().RegisterFruit(10,getGrape) Wink

??

Remy Lebeau (TeamB) · Guest

"xubo" <xu (AT) bbn (DOT) cn> wrote