[デザインパターン勉強会]FactoryMethodパターン

Seeeeee:Dの夏休み勉強会での資料．

Transcript

1. 'BDUPSZ
   .FUIPE 4FFFFFF%
   ༶໌఩
2.  w'BDUPSZ
   .FUIPEͰ͸ɼΫϥε಺Ͱ࢖͏ΦϒδΣΫτʢΠϯελϯε ͷੜ੒ํ๏ʹ͍ͭͯ޻෉Λߦ͏ɽ
   wॊೈʹΦϒδΣΫτΛੜ੒͢Δ͜ͱ͕ՄೳʹͳΔ
   wܧঝΛར༻͢Δͱ͖ʹ࢖͏σβΠϯύλʔϯ 'BDUPSZ
   .FUIPEͬͯʁ 5FNQMBUF.FUIPEΛ΋͏ͪΐͬͱ࢖͍΍͘͢ʂ
3.  wΠϯελϯεͷੜ੒Λɼந৅Ϋϥεʢ਌Ϋϥεʣʹ͢ΔͷͰ͸ͳ͘ɼα ϒΫϥε ࢠΫϥε ʹߦ͏͜ͱͰɼੜ੒͢ΔΠϯελϯεΛ؆୯ʹมߋ ͢Δ͜ͱ͕Ͱ͖Δɽ
   wΦϒδΣΫτͷੜ੒Λؔ਺Λܦ༝ͯ͠ߦ͏͜ͱͰ࣮૷Ͱ͖Δɽ 'BDUPSZ
   .FUIPEͬͯʁ ࣮૷ͷ޻෉ͷ΍Γ͔ͨ
4. ͡Ό͋۩ମతʹ͸
5.  wࠓճ͸ྉཧͷઃఆͰ࿩ΛਐΊ͍ͯ͘ɽ
   wྉཧ͢Δਓ͸ɼͦΕͧΕϨγϐΛݟͳ͕Βɼʮ੾Δˠম͘ˠࣽΔʯͷߦಈΛशಘ ͍ͯͯ͠ɼௐཧΛߦ͏ɽ
   wϨγϐ͸ɼ$PPLQBE΍ΫϥγϧͳͲಉ͡৯ࡐͰ΋ҟͳΔϨγϐ͕ଘࡏ͢Δɽ ࣮ࡍʹͭͬͯ͘Έͨ ઃఆΛ֬ೝ͍ͯ͘͠Α
6.  ॳ৺ऀ͕ௐཧ͍ͯ͘͠Α /PU
   'BDUPSZ
   .FUIPE ͱΓ͋͑ͣ$PPLQBEΛݟΔ͔ class Shoshinsya_Chouri(metaclass=ABCMeta): @abstractmethod def kiru(self): raise NotImplemented @abstractmethod def yaku(self): raise NotImplemented @abstractmethod def nikomu(self): raise NotImplemented def chouri(self): cookpad = Cookpad(self.shokuzai) self.kiru(cookpad.recipe) self.yaku(cookpad.recipe) self.nikomu(cookpad.recipe) print("Ͱ͖ͨʂ") class Shoshinsya(Shoshinsya_Chouri): def __init__(self, shokuzai): self.shokuzai = shokuzai def kiru(self, cookpad): print(f'{cookpad}Λࢀߟʹͯ͠{self.shokuzai}Λ੾Δͧ') def yaku(self, cookpad): print(f'{cookpad}Λࢀߟʹͯ͠{self.shokuzai}Λম͍͍ͯ͘') def nikomu(self, cookpad): print(f'{cookpad}Λࢀߟʹͯ͠{self.shokuzai}ΛࣽࠐΉΑ') ਌ΦϒδΣΫτͰ
   ϨγϐΛࢦఆͯ͠ ݟ͍ͯΔϨγϐ
7. ผʹ͜ΕͰΑ͘ͳ͍ʁ
8. Α͘ͳ͍Αʂ
9.  w͜ͷ࣮૷ํ๏ͩͱɼॳ৺ऀͷௐཧํ๏Λशಘ͍ͯ͠Δਓ͸ɼ$PPLQBE͔͠Ϩγϐ ΛݟΔ͜ͱ͕Ͱ͖ͳ͘ͳͬͯ͠·͏ɽ
   w$PPLQBEҎ֎΋ݟΔΑͶʁଞͷϨγϐ΋ݟ͍ͨΑͶʁʁ Կ͕ྑ͘ͳ͍ͷ͔ $PPLQBE͔͠Ϩγϐݟͳ͍ͷʁ
10. ਓʹΑͬͯΈΔ
    Ϩγϐҧ͏ΑͶʁ
11.  ͍ΖΜͳϨγϐʹରԠ͠Α͏ 'BDUPSZ
    .FUIPE αϒΫϥεͰϨγϐΛੜ੒͍ͯ͘͠Α class Chukyusha_Chouri(metaclass=ABCMeta): #snip def chouri(self): recipe = self.nanidetsukuru() self.kiru(recipe.recipe) self.yaku(recipe.recipe) self.nikomu(recipe.recipe) print("Ͱ͖ͨʂ") @abstractmethod def nanidetsukuru(self): raise NotImplementedError class Chukyusha(Chukyusha_Chouri): #snip def nanidetsukuru(self): return Kurashiru(self.shokuzai) αϒΫϥεʹ
    ·͔ͤΔ ਌Ϋϥεʹ೚͞Ε ͨϨγϐΛܾΊΔ
12.  wॳڃऀͷௐཧํ๏͔͠ձಘ͍ͯ͠ͳ͍ਓ͸ɼ$PPLQBE͔͠ϨγϐΛݟΔ͜ͱ͕Ͱ ͖ͳ͔ͨɽ
    w͔͠͠ɼதڃऀͷௐཧํ๏Λձಘ͍ͯ͠Δਓ͸$PPLQBEʹͩ͜ΘΒͳ͍ௐཧ͕Ͱ ͖Δɽ
    wதڃऀ͝ͱʹͦΕͧΕࣗ෼͕ݟΔϨγϐ͕ੜ੒͞ΕΔͷͰɼॊೈʹରԠͰ͖Δɽ
    w5FNQMBUF
    NFUIPEͩͱௐཧํ๏ͷΫϥεΛϨγϐ਺͚ͩมߋ͕ೖΔ
    w͔͠͠ɼ'BDUPSZͩͱͨͩαϒΫϥεͰมߋΛՃ͑ΔͷΈʂ 'BDUPSZ
    .FUIPEΛձಘͨ͠ྉཧਓ $PPLQBEҎ֎΋ϨγϐݟΕΔΑ͏ʹͳͬͨΑ
13.  w'BDUPSZ
    .FUIPE͸ɼ5FNQMBUF
    .FUIPEͱҧͬͯɼαϒδΣΫτͷੜ੒͸αϒΫ ϥεʹ೚ͤΔΑ͏ʹ͢Δɽ
    wαϒΫϥε͕ΦϒδΣΫτΛੜ੒͢ΔͷͰɼαϒΫϥεʹࣗ༝౓͕૿ͯ͠৭ʑͰ ͖ΔΑ͏ʹͳΔɽ
    w"CTUSBDU
    'BDUPSZ͸'BDUPSZ
    .FUIPEΛ΋ͬͱந৅తʹͨ͠΋ͷʁ ·ͱΊ 'BDUPSZ
    .FUIPEʹࣗ༝Λ