CODEWITHSUNDEEP
javaenumsannotationsinterface
Alan Mc Kernan
Alan Mc Kernan

Reputation: 763

Abstract enum a annotation attribute type

I have an interface which multiple enums are implementing, i.e

public interface MinorCodes {
    public abstract int code();
    public abstract String description();
}

public enum IdentityMinorCodes implements MinorCodes {
    IDENTITY_UPLOAD_PICTURE_CODE(1, "Error while trying to upload a picture."),
}

Now I want to have a custom annotation which has a value type of one of these concrete enum values, i.e

public @interface PokenService {
    MinorCodes[] exceptions();
}

But of course I cannot return an interface here.

Does anyone know any solution or workaround to this?

Thanks in advance.

Upvotes: 1

Views: 843

Answers (1)

sfussenegger
sfussenegger

Reputation: 36115

You could create an additional enum that wraps all your MinorCodes enum values:

public enum MinorCodesWrapper {
    IDENTITY_UPLOAD_PICTURE_CODE(IdentityMinorCodes.IDENTITY_UPLOAD_PICTURE_CODE),
    SOME_CODE(AnotherMinorCodes.SOME_CODE);

    private final MinorCodes _wrapped;

    MinorCodesWrapper(MinorCodes wrapped) {
        _wrapped = wrapped;
    }

    public MinorCodes getWrapped() {
        return _wrapped;
    }
}

public @interface PokenService {
    MinorCodesWrapper[] exceptions();
}

Not pretty, but works ;)

Upvotes: 2

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