pythonでFlyweightパターン

コード

#!/usr/bin/env python

# -*- coding: utf-8 -*-

import sys
class Stamp:

    type = ""

    def __init__(self, type):

        self.type = type

    def execute(self):

        if self.type is not "":

            print(self.type)

    

class StampFactory:

    pool = ""

    def __init__(self):

        self.pool = {None:Stamp}

    def get(self, type):

        self.pool[type] = Stamp(type)

        stamp = self.pool[type]

        if stamp is None:

            stamp = {type:Stamp(type)}

        return stamp
class FlyweightTest:

    def main(*args):

        sf = StampFactory()

        stamps = []

        stamps.append(sf.get(u"て"))

        stamps.append(sf.get(u"す"))

        stamps.append(sf.get(u"と"))

        stamps.append(sf.get(u"し"))

        stamps.append(sf.get(u"て"))

        stamps.append(sf.get(u"み"))

        stamps.append(sf.get(u"た"))

        stamps.append(sf.get(u"て"))

        stamps.append(sf.get(u"す"))

        stamps.append(sf.get(u"と"))

        

        print("POOL DATA-------------------------------")

        for i in sf.pool: 

            if i is not None:

                print i

        

        print("OUTPUT DATA-----------------------------")

        for v in stamps: v.execute()
if __name__ == "__main__":

    try:

        FlyweightTest().main(sys.argv)

    except Exception,e:

        print(e)

実行結果

mochi@mochi-server:~/src/GoF/python$ ./Flyweight.py

POOL DATA-------------------------------

て

と

た

し

す

み

OUTPUT DATA-----------------------------

て

す

と

し

て

み

た

て

す

と

こんな感じかな？

参照サイト
http://ja.wikipedia.org/wiki/Flyweight_%E3%83%91%E3%82%BF%E3%83%BC%E3%83%B3