Groovy-eclipse sees Traits as interfaces and urges to implement its methods

[injecteer]

I have a super-class implementing 2 traits:

class CRUDController<T extends MongoEntity> implements ControllerTrait, I18nTrait {...}

and it's sub-class:

class ScreenController extends CRUDController<Screen> {...}

The Eclipse of Version: 2021-03 (4.19.0) with Eclipse Groovy Development Tools 4.2.0.v202106101948-e2103 complains in a sub-class about not implemented methods and as quick fixes suggests to either make the class abstract or implement the methods:

The traits must supported also in sub-classes as they are compiled by Groovy compiler (ver. 3) just fine.

[eric-milles]

Can you provide a simple and complete example? Traits are supported, although there are some rough edges since they cannot be fully represented in the Java model.

[injecteer]

repro.zip

the class SubClass.groovy demonstrates the behaviour

[eric-milles]

I think this error is in the editor only. Can you confirm that it does not show up in the Problems view and you can compile and test your project successfully?

[injecteer]

Yes, it's in editor only, the errors do not appear in "Problems"

[eric-milles]

ready to test

[injecteer]

Looks much better thanks.

The other problem is, that in Editor for classes with @TypeChecked the trait methods are marked with "not found"

[eric-milles]

Can you update your sample project to demonstrate?

[injecteer]

here you go:

repro.zip

[eric-milles]

ready to test

[injecteer]

I don't get any new snapshots from https://dist.springsource.org/snapshot/GRECLIPSE/e4.19 now

[eric-milles]

You may need to restart eclipse for it to reload the update site metadata.

[injecteer]

it took a while to upgrade eclipse and reinstall Groovy feature 4.19 -> 4.20, but now I don't get any warnings about traits.
Well done!

[eric-milles]

Cheers. And thanks for filing an issue.