Python设计模式之抽象工厂模式原理与用法详解

#!/usr/bin/env python
# -*- coding:utf-8 -*-
__author__ = 'Andy'
"""
大话设计模式
设计模式——抽象工厂模式
抽象工厂模式(Abstract Factory Pattern):提供一个创建一系列相关或相互依赖对象的接口，而无需指定它们的类
"""
import sys
#抽象用户表类
class User(object):
  def get_user(self):
    pass
  def insert_user(self):
    pass
#抽象部门表类
class Department(object):
  def get_department(self):
    pass
  def insert_department(self):
    pass
#操作具体User数据库类-Mysql
class MysqlUser(User):
  def get_user(self):
    print 'MysqlUser get User'
  def insert_user(self):
    print 'MysqlUser insert User'
#操作具体Department数据库类-Mysql
class MysqlDepartment(Department):
  def get_department(self):
    print 'MysqlDepartment get department'
  def insert_department(self):
    print 'MysqlDepartment insert department'
#操作具体User数据库-Orcal
class OrcaleUser(User):
  def get_user(self):
    print 'OrcalUser get User'
  def insert_user(self):
    print 'OrcalUser insert User'
#操作具体Department数据库类-Orcal
class OrcaleDepartment(Department):
  def get_department(self):
    print 'OrcalDepartment get department'
  def insert_department(self):
    print 'OrcalDepartment insert department'
#抽象工厂类
class AbstractFactory(object):
  def create_user(self):
    pass
  def create_department(self):
    pass
class MysqlFactory(AbstractFactory):
  def create_user(self):
    return MysqlUser()
  def create_department(self):
    return MysqlDepartment()
class OrcaleFactory(AbstractFactory):
  def create_user(self):
    return OrcaleUser()
  def create_department(self):
    return OrcaleDepartment()
if __name__ == "__main__":
  db = sys.argv[1]
  myfactory = ''
  if db == 'Mysql':
    myfactory = MysqlFactory()
  elif db == 'Orcal':
    myfactory = OrcaleFactory()
  else:
    print "不支持的数据库类型"
    exit(0)
  user = myfactory.create_user()
  department = myfactory.create_department()
  user.insert_user()
  user.get_user()
  department.insert_department()
  department.get_department()