pattern-iterator

What problem does it solve?

This Skill keeps traversal logic outside business aggregates by teaching how to sequentially access collection elements without exposing their internal representations, preventing clients from corrupting sensitive domain structures.

Core Features & Use Cases

• Iterator and Collection Interfaces: Define the shared next()/hasNext() contract plus a method for creating iterators, establishing a uniform traversal API.
• Concrete Iterator Implementation: Encapsulate traversal state for specific domain collections, enabling deterministic pagination, filtering, or lazy loading behaviors.
• Use Case: When a club aggregate exposes a roster, apply this pattern to iterate through player entities safely for reporting or batch invitations.

Quick Start

Ask the skill to generate an iterator implementation for your domain collection that keeps the aggregate root’s internal list private while exposing ordered access.