No access to ImmutableMetadata keys

[MaxFeldman1]

FlagEvaluationDetails contains a member ImmutableMetadata flagMetadata which is effectively a wrapper around a private map and to the client which has just called getObjectDetails or a similar function and wants to look at / log the key,value pairs in flagMetadata it is not known what the keys are. I checked and in the GO sdk one has the ability to loop through the keys of this flag metadata since the entire map is exposed though the current design for the java sdk makes this impossible in java without the client using reflection (generally bad practice).

Link Go SDK documentation of flag metadata

[aepfli]

hey, thank you for reaching out and i can clearly see the inconvenience, but to be sure, that we are not stumbling upon an xy-problem. What is your motivation behind accessing them ;)

Anyways, we already had the same issues for testing in the providers. Our POJO's are currently a mess, we do not have one approach for them, but multiple, often they share different approaches for implementation, and one of our goals for the next major release is a clean up of them.

https://github.com/open-feature/java-sdk-contrib/blob/484b070af0546d371aebd19d8cd41dc113e77e9b/providers/flagd/src/test/java/dev/openfeature/contrib/providers/flagd/e2e/steps/FlagSteps.java#L110-L117

    public void the_resolved_metadata_is_empty() throws NoSuchFieldException, IllegalAccessException {
        ImmutableMetadata flagMetadata = state.evaluation.getFlagMetadata();

        Field metadataField = flagMetadata.getClass().getDeclaredField("metadata");
        metadataField.setAccessible(true);
        Map<String, Object> metadataMap = (Map<String, Object>) metadataField.get(flagMetadata);
        assertThat(metadataMap).isEmpty();
    }

If you want to provide a PR adding accessibility, I am more than happy to guide/review/support you.

[aepfli]

i will give it a shot

[carla-was-not-available]

Hey, I would love to try this.