How can I check the value in a key-value nested list?

Question

I have created a REST web service.

I have in the response, a nested list with 5 key-value associations in each list. I only want to check if each value has the right format (boolean, string or integer).

So this is the nested list.

{"marches": [
      {
      "id": 13,
      "libelle": "CAS",
      "libelleSite": "USA",
      "siteId": 1,
      "right": false,
      "active": true
   },
      {
      "id": 21,
      "libelle": "MQS",
      "libelleSite": "Spain",
      "siteId": 1,
      "right": false,
      "active": true
   },
      {
      "id": 1,
      "libelle": "ASCV",
      "libelleSite": "Italy",
      "siteId": 1,
      "right": false,
      "active": true
   }]
}

I use the JsonSlurper class to read the groovy response.

import groovy.json.JsonSlurper
def responseMessage = messageExchange.response.responseContent
def json = new JsonSlurper().parseText(responseMessage)

With this following loop, I achieve in getting each block of list.

marches.each { n ->
    log.info "Nested $n \n"
}

I want for instance check if the value associated to the key "id", "13" is well an integer and so on.

Answer 1

You're almost there. Inside of the .each, it represents the nested object:

json.marches.each { 
  assert it.id instanceof Integer  // one way to do it

  //another way
  if( !(it.libelle instanceof String) ){
    log.info "${it.id} has bad libelle"
  } 

  //one more way
  return (it.libelleSite instanceof String) &&
     (it.siteId instanceof Integer) && (it.right instanceof Boolean)
}

If you don't care about the specifics and just want to make sure they're all good, you can also use .every:

assert json.marches.every {
    it.id instanceof Integer &&
    it.libelle instanceof String &&
    it.libelleSite instanceof String &&
    it.active instanceof Boolean  //...and so on
}