factory-pattern-applied

Use a factory pattern when constructors become complex, creation logic is scattered across client code, or external dependencies like pricing and inventory checks are needed to instantiate a valid domain object.

Refactor complex constructors by extracting the instantiation logic into static factory methods or dedicated factory classes, encapsulating dependencies to ensure the domain object is created in a valid, well-formed state.

Encapsulate external dependencies within a dedicated Factory class or static factory method to handle data fetching and invariant validation, ensuring the domain object is returned in a valid state.

Yes, the factory pattern replaces multiple overloaded constructors with explicitly named static factory methods, clarifying object instantiation intent and simplifying client code that creates domain objects.

Yes, static factory methods work for simpler instantiation, but dedicated factory classes are better when complex external dependencies or multiple creation steps are needed to satisfy domain invariants and simplify client code.

Scattered creation logic causes maintenance issues by spreading invariant validation and dependency resolution across client code, making it difficult to ensure domain objects are consistently instantiated in a valid state.