You can use GSON and just parse your objects into POJOs and access them with dot notation.

In fact, now that I think about it, I wonder if you can rig up your POJOs as Java 8 Option<> and remove some of the null checking. I'll have to look into that.

That's a good place to start. Basing it on the list monad instead of the option monad gives you traversals with monoidal summaries.

AH! That's the missing piece for me. I thought this was all in JS.