"""

Factory Method Pattern - A pattern which uses sub classes to generate an

object. This pattern can be considered a more advanced version of the

Simple Factory Pattern but it delegates the creation of components to

the subclasses

Example - The Super Administrator is considered the Creator in the application

He/she is able to create an administrator account, an editor account or just

a normal user account

In this example I use npm:prompt to get user input

"""

class SuperAdministrator(object):

def createUser(self):

return

class AdminCreator(SuperAdministrator):

def createUser(self):

return Admin()

class EditorCreator(SuperAdministrator):

def createUser(self):

return Editor()

class UserCreator(SuperAdministrator):

def createUser(self):

return User()

class User(object):

def __init__(self, privileges=None):

# Default CanView

self.privileges = ["CanView"];

if privileges:

self.privileges.extend(privileges)

def getPrivileges(self):

return self.privileges

class Admin(User):

def __init__(self):

super(Admin, self).__init__(["CanCreate", "CanEdit"])

class Editor(User):

def __init__(self):

super(Editor, self).__init__(["CanEdit"])

userType = raw_input("What kind of user do you wish to create? ['admin', 'editor', 'normal']")

if userType == "admin":

userFactory = AdminCreator()

elif userType == "editor":

userFactory = EditorCreator()

else:

userFactory = UserCreator()

user = userFactory.createUser()

print user.getPrivileges()