June 2022
Beginner to intermediate
672 pages
17h 23m
Japanese
Content preview from Head Firstデザインパターン 第2版 ―頭とからだで覚えるデザインパターンの基本
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createPizza()
ChicagoPizzaStore
createPizza()
NYPizzaStore
Pizza
NYStyleCheesePizza
NYStyleVeggiePizza
NYStyleClamPizza
NYStylePepperoniPizza
ChicagoStyleVeggiePizza
ChicagoStyleClamPizza
ChicagoStylePepperoniPizza
ChicagoStyleCheesePizza
createPizza()
orderPizza()
PizzaStore
ついに
Factory Method
パターンに対面するときが来た
オブジェクト作成をカプセル化するのがファクトリパターンです。中でも
Factory Method
パターンは、作成するオブ
ジェクトをサブクラスに決定させることによって、オブジェクト作成をカプセル化します。以下のクラス図をよく観察し
て、このパターンの構成要素を確認しましょう。
多くの場合、作成者クラスには抽象製品
に依存するコードが含まれています。抽
象製品はサブクラスによって作成されま
す。作成者クラスはどの具象製品が作成
されたか知ることはありません。
各フランチャイズ店は
PizzaStore
の独自のサブクラスを持ち、
createPizza()
を実装して独自ス
タイルのピザを自由に作ることが
できます。
createPizza()
メソッドは
ファクトリメソッドです。こ
のメソッドは製品を作成しま
す。
これは抽象作成者クラスで
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.