设计模式六（建造者模式，采用python实现）

#######################################################
# 
# codes.py
# Python implementation of the Class Builder
# Generated by Enterprise Architect
# Created on:      10-十二月-2012 15:10:15
# 
#######################################################
from __future__ import division
from __future__ import print_function
from __future__ import unicode_literals
from future_builtins import *
import sys

class Builder(object):
    """This class specifies an abstract interface for creating parts of a Product
    object.
    """
    def __init__(self):
        super(Builder,self).__init__()
        pass
    def Builder(self):
        pass

    def BuildPart(self):
        pass

class ConcreteBuilderA(Builder):
    """This class (a) constructs and assembles parts of the product by implementing
    the Builder interface, (b) defines and keeps track of the representation it
    creates, and (c) provides an interface for retrieving the product.
    """
    def __init__(self):
        super(ConcreteBuilderA,self).__init__()
        self.product=Product()
        pass
    def AddBody(self):
        str='get body from export depot'
        self.product.Add(str)
        pass

    def AddCase(self):
        str='get case from export depot'
        self.product.Add(str)        
        pass

    def BuildPart(self):
        self.AddBody();
        self.AddCase();
        self.check()
        pass

    def check(self):
        str='pass for export market'
        self.product.Add(str)        
        pass

    def GetResult(self):
        return self.product
        pass

class ConcreteBuilderB(Builder):
    """This class (a) constructs and assembles parts of the product by implementing
    the Builder interface, (b) defines and keeps track of the representation it
    creates, and (c) provides an interface for retrieving the product.
 
    """
    def __init__(self):
        super(ConcreteBuilderB,self).__init__()
        self.product=Product()        
        pass 
    def AddBody(self):
        str='get body from domestic depot'
        self.product.Add(str)
        pass

    def AddCase(self):
        str='get case from domestic depot'
        self.product.Add(str)        
        pass

    def BuildPart(self):
        self.AddBody();
        self.AddCase();
        self.check()
        pass

    def check(self):
        str='pass for domestic market'
        self.product.Add(str)        
        pass

    def GetResult(self):
        return self.product
        pass

class Director(object):
    """This class constructs an object using the Builder interface.
    """
    m_Builder= Builder()

    def __init__(self):
        super(Director,self).__init__()
        pass
    def Construct(self,builder):
        # for all objects in structure {
        #     builder->BuildPart()
        # }
        self.m_Builder=builder
        self.m_Builder.BuildPart()
        pass

class Product(object):
    """This class (a) represents the complex object under construction.
    ConcreteBuilder builds the product's internal representation and defines the
    process by which it's assembled, and (b) includes classes that define the
    constituent parts, including interfaces for assembling the parts into the final
    result.
    """
    def __init__(self):
        super(Product,self).__init__()
        self.log=list()
    def Add(self,str):
        self.log.append(str)
        pass

    def getLog(self):
        return self.log
        pass
# 客户端：   
if (__name__=="__main__"):
    builder=ConcreteBuilderA()
    director=Director();
    
    director.Construct(builder)
    product=builder.GetResult()
    
    log=product.getLog()
    for i in xrange(len(log)):
        print(log[i])