That's not the reason. The question was about JSON generation from existing Java types, not about a DSL. Java JSON libraries offer similar conveniences (in fact, you can be much more sophisticated, clear, and convenient than the DSL you've shown), but this particular library, as explicitly described in the JEP, is not intended to be a general-purpose JSON library, of which Java already has several good and popular ones.
replyThat's not what the person I replied to asked at all, arbitrary types weren't mentioned.
replyThey literally asked why they couldn't write JsonObject.of(Map.of(...))
And there's nothing in Java preventing that. In fact, it is trivial to implement that exact API on top of the API proposed in the JEP.
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