Additional Notes
How do sealed classes improve domain modeling?
Track: Java
Topic: Language Upgrades
Focus: Sealed Classes
Java: Sealed Classes
Answer
They enforce structural rules within the codebase.
Sealed classes improve domain modeling by enforcing rules about which classes can appear in a hierarchy. This makes the code more maintainable and predictable. For example, in a checkout flow, you might have a sealed class `Order` that only permits `OnlineOrder` and `InStoreOrder` to extend it. This restriction ensures that other types of orders cannot be inadvertently added, preserving the integrity of the domain model.
Sealed classes improve domain modeling by enforcing rules about which classes can appear in a hierarchy. This makes the code more maintainable and predictable. For example, in a checkout flow, you might have a sealed class `Order` that only permits `OnlineOrder` and `InStoreOrder` to extend it. This restriction ensures that other types of orders cannot be inadvertently added, preserving the integrity of the domain model.
Topics: Java Language Upgrades Sealed Classes