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What does code smell mean?
In computer programming, a code smell is any characteristic in the source code of a program that possibly indicates a deeper problem. Determining what is and is not a code smell is subjective, and varies by language, developer, and development methodology.
Can a data class have methods?
A data class refers to a class that contains only fields and crud methods for accessing them (getters and setters). These are simply containers for data used by other classes. These classes do not contain any additional functionality and cannot independently operate on the data that they own.
Is a type of data class?
As noted previously, the purpose of a data type class is to be used as the type of a property, particularly within a class that extends one of the core object classes. The following shows an example object class that has three properties. Each property uses a data type class as its type.
Which is an example of a code smell?
Large Classes: A class contains many methods/lines of code/fields is considered a code smell. Classes usually start as a small one, but over time, they expand as the program grows. To treat this code smell, further refactoring techniques could be done like, extract class, extract subclass, extract interface, duplicate observed data.
How to get rid of the code smell?
Use global or local variables to refactor this code smell. If the data class contains public data, we can use the Encapsulation Method to hide it. Other refactoring techniques to solve this are: Move, Extract, and Remove Methods. Data Clumps: Data that looks similar maybe belongs to the same class.
What does it mean when your program smells like code?
With code smells too, your program might work just fine. They do not prevent the program from functioning or are incorrect. They just signify the weakness in design and might increase the risk of bugs and program failure in the future.
When to write classes to represent complex data?
If your data type is sufficiently complex, write a class to represent it. Avoid classes that passively store data. Classes should contain data and methods to operate on that data, too. If you always see the same data hanging around together, maybe it belongs together. Consider rolling the related data up into a larger class.