名稱:Builder
中文名:生成器
類型:創建型
簡介:首先我要說:又一個相似、又一個
充分的OOP多態的利用.
不錯,在體現一個接口多種實現上,
相似於Bridge.然它還有一個最大的
個性:那實現的接口簽名被分解成多步的流程式.
對,就是這裏.這樣的方式有利於複雜對象(產品)
的精細控制.自然,對於較大的工程,對同樣處理
步驟的分離也是指導思想之一.那麼結合
起來講:它通過流程處理簽名
接口能精細的產生不同的複雜對象(產品),並可
自然的複用同處理.
[C#]
// created on 2003-3-14 at 10:13
//member:
//builder + concretebuilder + director + product
/*
interface builder{
string fook_(string m_STR1);
string fook__(string m_STR2);
string fook___(string m_STR3);
}
*/
using System;
class product_{
public string _str;
public product_(){
_str = "product_";
}
}
class builder{
public product_ m_OBJREF;
public builder(){
m_OBJREF = new product_();
}
virtual public product_ getproduct(){
return m_OBJREF;
}
virtual public void fook_(){
m_OBJREF._str = m_OBJREF._str+" bulider_fook_ ";
}
virtual public void fook__(){
m_OBJREF._str = m_OBJREF._str+" builder_fook__ ";
}
virtual public void fook___(){
m_OBJREF._str = m_OBJREF._str+" buidler_fook__ ";
}
}
class concretebuilder1:builder{
override public void fook_(){
m_OBJREF._str = m_OBJREF._str+" concreatebuilder1_fook_ ";
}
override public void fook___(){
m_OBJREF._str = m_OBJREF._str+" concreatebuilder1_fook___ ";
}
override public product_ getproduct(){return m_OBJREF;}
}
class concretebuilder2:builder{
override public void fook_(){
m_OBJREF._str = m_OBJREF._str+" concreatebuilder2_fook_ ";
}
override public void fook___(){
m_OBJREF._str = m_OBJREF._str+" concreatebuilder2_fook___ ";
}
override public product_ getproduct(){return m_OBJREF;}
}
class director{
public void BUILDPROCESS(builder m_OBJREFprocess){
m_OBJREFprocess.fook_();
m_OBJREFprocess.fook__();
m_OBJREFprocess.fook___();
}
}
class builder_test{
public static void Main()
{
director m_OBJdirector = new director();
concretebuilder1 m_OBJ1 = new concretebuilder1();
m_OBJdirector.BUILDPROCESS(m_OBJ1);
product_ m_OBJproduct_ = m_OBJ1.getproduct();
concretebuilder2 m_OBJ2 = new concretebuilder2();
m_OBJdirector.BUILDPROCESS(m_OBJ2);
product_ m_OBJproduct__ = m_OBJ2.getproduct();
Console.WriteLine(m_OBJproduct_._str);
Console.WriteLine(m_OBJproduct__._str);
}
}
簡評:
1.我們建builder時,並未使用interface或者abstract class.
是爲了the same transactor.
2.由Dirctor指導流程.而且Dirctor自己也不知道產生的產品是
什麼.這樣就將產品的信息完全隱藏.
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聲明:本程式重在演示C#基本用法
不考慮在實際環境中應用帶來
其它問題的情況.
如:多線程.
[用設計模式鍛鍊C#系列]之Singleton、Bridge
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