RFR: 8292275: javac does not emit SYNTHETIC and MANDATED flags for parameters by default [v3]

[Joe Darcy]

On Tue, 16 Aug 2022 07:17:41 GMT, Hannes Greule <duke at openjdk.org> wrote:

> Sorry, it looks like there is no way to access the synthetic/mandated information using the annotation processing API. Am I missing something?

For reasons of providing a minimal core language model that could be reused, less essential functionality is split in the language model API to be provided by an implementation of javax.lang.model.util.Elements.

So if you subclass JavacTestingAbstractProcessor files that test directory, you could use

eltUtils.getOrigin(elementForParameter)

to see if an element is marked as javax.lang.model.util.Enum Elements.Origin.{MANDATED, SYNTHETIC}.

Many of the annotation processing tests use a pattern of using a runtime-retention annotation to encode what the expected answer is. In this case, I'd recommend a method/constructor annotation to hold the expected origin of the parameters.

(The annotation processing API does filter out some SYNTHETIC constructs, but I don't recall if that is done at a parameter level.)

HTH

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PR: https://git.openjdk.org/jdk/pull/9862