I have below input json and my goal is to write a jolt mapper that will just remove the null from the input json and print all other values as is.

Input:

{
  "accounts": {
    "cust": [
      {
        "Num": [
          "2",
          "5"
        ],
        "Type": "AB"
      },
      {
        "Num": [
          "2",
          "5"
        ],
        "Type": "CD"
      },
      null
    ]
  }
}

Expected Output:

{
  "accounts" : {
    "cust" : [ {
      "Num" : [ "2", "5" ],
      "Type" : "AB"
    }, {
      "Num" : [ "2", "5" ],
      "Type" : "CD"
    }]
  }
}

I tried following mapper, it removes null however it prints the values twice.

Mapper:

[
  {
    "operation": "shift",
    "spec": {
      "accounts": {
        "cust": {
          "*": {
            "*": {
              "@1": "accounts.cust"
            }
          }
        }
      }
    }
}
]

Actual Output:

{
  "accounts" : {
    "cust" : [ {
      "Num" : [ "2", "5" ],
      "Type" : "AB"
    }, {
      "Num" : [ "2", "5" ],
      "Type" : "AB"
    }, {
      "Num" : [ "2", "5" ],
      "Type" : "CD"
    }, {
      "Num" : [ "2", "5" ],
      "Type" : "CD"
    } ]
  }
}

Any help would be appreciated. Thanks!