JSON or XML with single element not coming as array problem solution through Jolt Transform?

Question

Problem Statement :

While mapping XML or Json through Jackson or other Java libraries then arrays are incorrectly serialized in certain cases. i.e

When an array has more than 1 entry, it is serialized correctly

{
  "Car": {
    "data": [
      {
        "car": "Toyota"
      },
      {
        "car": "Maruti"
      }
    ]
  }
}

but when the array has only 1 entry, it is serialized not as an array, but as a single object.

{
  "Car": {
    "data": {
      "car": "Maruti"
    }
  }
}

Solution through Jolt Transform?

Answer 1

Figured out the solution for this problem through JOLT :

INPUT 1 :

{
  "Car": {
    "data": [
      {
        "car": "Toyota"
      },
      {
        "car": "Maruti"
      }
    ]
  }
}

INPUT 2:

{
  "Car": {
    "data": [
      {
        "car": "Toyota"
      }
    ]
  }
}

JOLT SPEC :

[
  {
    "operation": "cardinality",
    "spec": {
      "Car": {
        "data": "MANY"
      }
    }
  }
]