Flyweight模式在C ++ [英] Flyweight Pattern in C++

问题描述

创建flyweight模式时，通常如何存储超浅对象。让我说我创建一架飞机。

When creating a flyweight pattern, how does one usually store superflous objects. Lets say I create an Aircraft.

class Aircraft
{
private:
    char make[32];
    char model[32];
    double cruiseSpeed;
    double cruiseAltitude;
    double climbRate;
    double wingspan;
    double fuselageLength;

    AircraftType craftType;

public:

    Aircraft(void);
    Aircraft(AircraftType);
    ~Aircraft(void);

    void setMake(char*);
    void setModel(char*);
    void setCruiseSpeed(double);
    void setCruiseAltitude(double);
    void setClimbRate(double);
    void setWingSpan(double);
    void setFuselageLength(double);

    char* getMake();
    char* getModel();
    double getCruiseSpeed();
    double getCruiseAltitude();
    double getClimbRate();
    double getWingSpan();
    double getFuselageLength();    
};

还说我在从许多飞机上阅读一个xml数据表，所以我想只是创建一个这些对象并将其余信息存储在某处。我会创建另一个类来管理飞重量信息，然后可能传递一个关键与飞机对象输入到唯一的实例一次？

Lets also say I'm reading in many aircrafts from an xml data sheet, so I want to just create one one these objects and store the rest of the information somewhere. Would I create another class that manages the flyweight information, then maybe pass it a key with the Aircraft object to input into the only instance one at a time? Or would you just bypass putting the information in the object instance at all?

对于这种类型的对象，在不创建多个实例时获得的唯一效率是get和

For this type of object, would the only efficiency gained in not creating multiple instance be the get and sets?

推荐答案

如果你不想使用boost，在这种情况下使用boost。

If you don't want to use boost, use boost in such case.

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