建造者模式【BUILDER PATTERN 】

construct.h

/*
 * construct.h
 *
 *  Created on: Sep 20, 2012
 *      Author: hl
 */

#ifndef _CONSTRUCT_H_
#define _CONSTRUCT_H_
#include <string>
#include <vector>

using namespace std;

/**
 * @brief 建造者模式，定义一系列过程，由派生类去实现；同时自己提供一个该一系列过程的结果...
 * 自己调用自己，同时调用的实现由派生类去做；就像父类调用派生类....
 * 然后实现一个定义调用动作顺序的向量。
 */
class Template
{
public:
    Template()
    {
        vecs.empty();
    }
    ~Template()
    {
        vecs.empty();
    }
protected:
    virtual void OpenFire() = 0;
    virtual void Cleanpan() = 0;
    virtual void Cook() = 0;
public:
    void Sequence(string nowDo);    /// < 可以多次调用，实现多种组合；记得如果连续使用，最后清空下！
    void DoFood();
private:
    vector<string> vecs;
};

/**
 * @brief 男孩做饭 - 独家秘方
 */
class Boy : public Template
{
private:
    void OpenFire();
    void Cleanpan();
    void Cook();
};

#endif /* _CONSTRUCT_H_ */

construct.cpp

//============================================================================
// Name        : construct.cpp
// Author      : hl
// Version     :
// Copyright   : Copyright (c) 2012 Tiros
// Description : Constructer Model in C++, Ansi-style
//============================================================================

#include <iostream>
#include "construct.h"
using namespace std;

#define FIRE "Fire"
#define CLEAN "Clean"
#define COOK "Cook"

void Template::Sequence(string nowDo)
{
    if (nowDo.empty())
        return ;
    vecs.push_back(nowDo);
}

void Template::DoFood()
{
    vector<string>::iterator iter = vecs.begin();
    for(; iter != vecs.end(); iter++)
    {
        if (FIRE == *iter)    /// < C++字符串的比较
            OpenFire();
        if (CLEAN == *iter)
            Cleanpan();
        if (COOK == *iter)
            Cook();
    }
}

void Boy::OpenFire()
{
    cout << "打开火" << endl;
}

void Boy::Cleanpan()
{
    cout << "洗锅" << endl;
}

void Boy::Cook()
{
    cout << "烧饭" << endl;
}

int main()
{
    Template * pTemplate = new Boy();
    pTemplate->Sequence(FIRE);
    pTemplate->Sequence(COOK);
    pTemplate->Sequence(CLEAN);
    pTemplate->DoFood();
    delete pTemplate;

    return 0;
}