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Awesome Java Newsletter0 Hot0 comments2 min read
New guide: Preparing for Change: Safe Switching over Sealed APIs
Project Amber published a new guide titled 'Preparing for Change: Safe Switching over Sealed APIs,' explaining how exhaustive switch expressions over sealed types interact with API evolution, why using a default case is almost never the right choice, and how API authors and client code can communicate intent around future changes. The mailing list thread discusses the guide's content, including a question about whether there's a formal way for API authors to document expected evolution of sealed types, with Alex Buckley clarifying that an earlier draft considered specific javadoc suggestions but the team decided that explaining the reasoning for sealing a type covers this need, referencing the guide's section 'Sealed types can evolve, and often will.'
Source: https://mail.openjdk.org/archives/list/amber-dev@openjdk.org/thread/IXB3PQ7P5D7VIX4HIUZH4BTDRXX6JFG5. 8 Sync News only summarizes and links out; content copyright belongs to the authors and original sources.
