July 2024
Beginner to intermediate
272 pages
5h 40m
Japanese
Content preview from アーキテクトの教科書 価値を生むソフトウェアのアーキテクチャ構築
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// src/main/java/sample/chap02/isp/after/IssueTicket.java
public class IssueTicket implements Ticket {
// 実装は省略
}
estimate
メソッドと
record
メソッドを
Ticket
インターフェースから
分離し、
Estimatable
インターフェースを新しく作りました。これは、
バグチケットやストーリーチケットのように見積もりと実績記録を行う
ことができる役割を表すインターフェースです。
結果として、
BugTicket
および
StoryTicket
は
Ticket
と
Estimatable
の両インターフェースを、
IssueTicket
は
Ticket
インターフェースのみ
を実装するように変わりました。
インターフェースが分離されたので、もし見積もりと実績記録に関わ
る仕様変更が発生して
Estimatable
インターフェースが変更されたとし
ても、
IssueTicket
クラスやそのクライアントコードは影響を受けるこ
とはありません。
同じような話をどこかでしましたね。そう、ISPはSRPとの関連性が
強い原則なのです。
DIP：依存関係逆転の原則
a. 上位のモジュールは下位のモジュールに依存してはならない。
どちらのモジュールも「抽象」に依存すべきである。
b. 「抽象」は実装の詳細に依存してはならない。実装の詳細が「抽
象」に依存すべきである。
※7
DIPは、SOLIDの他の四原則よりも抽象レベルを上げて考える必要 ...
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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.
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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.