如何使用适配器或桥接器将 C++ 框架与其他系统连接

class FileAdapter : public IFile2 {
public:
    FileAdapter(IFile* file) : _file(file) {}

    virtual void Open(const char* filename) override {
        _file->Open(filename);
    }

    virtual void Close() override {
        _file->Close();
    }

    virtual int Read(char* buffer, int length) override {
        return _file->Read(buffer, length);
    }

    virtual int Write(const char* buffer, int length) override {
        return _file->Write(buffer, length);
    }

private:
    IFile* _file;
};

abstract class Shape {
public:
    virtual void Draw() = 0;
};

class Renderer {
public:
    Renderer(Shape* shape) : _shape(shape) {}

    void SetDrawMode(DrawMode mode) {
        _drawMode = mode;
    }

    void Draw() {
        if (_drawMode == FILL) {
            _shape->DrawFill();
        } else if (_drawMode == OUTLINE) {
            _shape->DrawOutline();
        }
    }

private:
    Shape* _shape;
    DrawMode _drawMode;
};

Renderer renderer(new Circle());
renderer.SetDrawMode(FILL);
renderer.Draw(); // 绘制填充圆形
renderer.SetDrawMode(OUTLINE);
renderer.Draw(); // 绘制圆形轮廓