Is there an way to get dynamically the path of object in jsonpath?

Question

What i am trying

I have a configuration object like so:

// set to $.config
{
  "DE": {
    "hello": "hallo"
  },
  "EN": {
    "hello": "hallo"
  },
  "ES": {
    "hello": "hola"
  }
}

which has been set in the variable $.config in a step function and a var $.language set to DE.

Now i would love to select the right key in doing something like:

Next Step:
  Type: Pass
  Parameters:
    localizedHello.$: $.config[$.language].hello
                              ^ this sadly does not work
  ...

Do you know a better way then using a pass step?

What i tried

I know the example below works but it is really a cumbersome approach!

Its is German:
  Type: Pass
  Parameters:
    localizedConfig.$: $.config.DE
  ResultPath: $.selected
  Next: Next Step
Next Step:
  Type: Pass
  Parameters:
    localizedHello.$: $.selected.localizedConfig.hello
  ...

Also there is no Intrinsic Function for it, like:

Next Step:
  Type: Pass
  Parameters:
    localizedHello.$: States.Get(States.Get($.config, $.language), 'hello')
...

Answer 1

Unfortunately, there's not a way to do what you're asking.

Fortunately, we're building a spec for JSON Path now. I've added your use case to a proposal that would support what you're looking for.