[java] edition 2024 Message.getDescriptor() failed in junit @Test

[peterweb2005]

.proto

edition = "2024";
//option features.(pb.java).nest_in_file_class = NO;
// uncomment above will error in protoc: Option pb.JavaFeatures.nest_in_file_class cannot be set on an entity of type `file`

error stacktrace when call Message.getDescriptor()

IllegalStateException: getDescriptor() called before internalInit()
	at com.google.protobuf.GeneratedMessage$GeneratedExtension.getDescriptor(GeneratedMessage.java:1950)
	at com.google.protobuf.ExtensionRegistry.newExtensionInfo(ExtensionRegistry.java:212)
	at com.google.protobuf.ExtensionRegistry.add(ExtensionRegistry.java:203)
	at com.google.protobuf.ExtensionRegistry.add(ExtensionRegistry.java:208)
	at com.google.protobuf.Descriptors.getJavaEditionDefaults(Descriptors.java:97)
	... 33 more

update

related to option "nest_in_file_class", don't know how to make it YES (and works)

[mkruskal-google]

The reason you can't get nest_in_file_class working is because we moved it from a file-level setting to a per-message/enum/service feature (https://protobuf.dev/editions/features/#java-nest_in_file). You need to set it on each individual class you want nested in the file class.

We strongly recommend against overriding this feature except to maintain backwards-compatibility, because it makes future refactorings much more difficult in Java as you get more dependencies over time. The reason we split this up is to handle new messages better by default instead of cargo-culting them inside the file class forever

It sounds like in this case you are trying to maintain backwards compatibility though, and this error looks like you broke some code that was depending on the old location of the message. You would just need to put option features.(pb.java).nest_in_file_class = YES inside your message definition

[peterweb2005]

@mkruskal-google I also want to use latest feature, nest_in_file_class NO, not nested, but has the error, IllegalStateException: getDescriptor() called before internalInit(), in junit @test

previously only stated that when I am trying to make the above error not appear, I had tried to nest_in_file_class YES, but not work, because still generated many data message class files when I put the option inside my root message

summary, turn nest_in_file_class YES or NO both not working, so i opened this issues