Class Structure

Intro

• Clean needs to be well organized inside classes
• Classes must have proper package and namespace structure

Internal Organization(Java)

Attributes

1. Constants (private final static)
2. Static private attributes
3. Private attributes(members)

Methods

1. Public methods => Or logically linked group of methods
2. Private methods that they use
3. Other public methods or group...

Principles

• We aim to read the class just like we would a newspaper
• Sometimes getters/setters go to the end to avoid extra noise
• No public attributes => rare exceptions

Encapsulation

• Prefer private attributes
• There are times where we need to compromise
• Be weary of protected attributes

What it contains?

1. Class should be small
2. It should be even smaller

• It is not measured in terms of LOC(lines of code), rather in terms of responsibilities. Should respect Single Responsibility Principle(SRP)

Class Packaging

Maximize in namespaces and packages

Default package

• Never put classes in a default package

Respect naming conventions

• Proper to the language
• Considers business model, glossary, etc..

Less abbreviations as possible

• They do not mean the same thing to everybody

In logical grouping

• What looks alike sticks together
• Think about dependencies
• Think about code reuse
• Logical arborescence

Separate sub-components

• Should be separated in sub-packages