保持模型与代码同步：面向战术领域驱动设计的往返工程
Keeping Models and Code in Sync: Roundtrip Engineering for Tactical Domain-Driven Design
AI总结：
本文提出面向战术DDD的双向同步工具链JDomInO，可保持Java代码库与领域模型同步，其正向路径已在酒店管场景验证，反向路径通过单元测试，还可作为AI代码助手的精准上下文层。
AI中文摘要：
领域驱动设计（Domain-Driven Design，简称DDD）为团队提供了用于复杂业务逻辑的共享词汇表，但该词汇表仅在模型与代码保持一致时才有用。实践中，二者会逐渐偏离：代码变更速度超过模型，或模型修订从未纳入代码库。本文提出JDomInO，这是一个面向战术DDD的双向同步工具链，通过共享元模型将Java代码库及其领域模型关联，以在系统演进过程中保持二者同步。JDomInO可从领域模型确定性生成Java代码结构（正向路径），并从现有Java代码重构领域模型（反向路径）。正向路径已在酒店管场景中完成全部验证，覆盖元模型的全部12种构建块类型；反向路径的映射逻辑已通过单元测试，端到端验证正在进行中。此外，本文还阐述了JDomInO生成的结构化领域模型如何作为AI代码助手的精准上下文层，帮助其理解原始源代码无法传达的聚合边界与DDD语义。
英文摘要：
Domain-Driven Design gives teams a shared vocabulary for complex business logic, but that vocabulary only stays useful as long as the model and the code agree with each other. In practice, they drift apart: code changes outpace the model, or model revisions never make it into the codebase. This paper presents JDomInO, a bidirectional synchronization toolchain for tactical DDD that keeps a Java codebase and its domain model connected through a shared metamodel, with the goal of keeping the two in sync as the system evolves. JDomInO generates Java code structure deterministically from a domain model (forward path) and reconstructs a domain model from existing Java code (reverse path). The forward path has been fully validated on a Hotel Management scenario covering all 12 building block types in the metamodel; the reverse path's mapping logic has passed unit testing, with end-to-end validation underway. We also outline how the structured domain model produced by JDomInO could serve as a precision context layer for AI code assistants, helping them respect aggregate boundaries and DDD semantics that raw source code alone does not convey.
