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Editorial Team
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Asked: 2026-06-15T17:30:29+00:00

Consider the following, simplified class: class Book { string title; Author author; } Simple

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Consider the following, simplified class:

class Book {
   string title;
   Author author;
}

Simple enough. However, when adding methods like getBookFromDatabase(int bookId), should this be placed as a static method in this same class, or rather in a separate (i.e) BookManager–class?

Usage example:

Book b = Book.getBookFromDatabase(42);

vs.

Book b = BookManager.getBookFromDatabase(42);

I do realize that this is somewhat a matter of taste, but what is the optimal following the OOP-guidlines?

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1 Answer

  1. Editorial Team

    Personally, I like the “Manager” class approach. It separates the logic, so that a Book doesn’t have to know anything about how to acquire itself. Also, BookManager can be a singleton here – not instantiated until one actually needs to acquire a Book.

    Furthermore, the BookManager can perform additionaly book-keeping tasks (no pun intended), such as caching, or maybe there are some Book events to subscribe to at a global level.

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