question Re: Jolt transform for moving json message to subset without mapping all the fields one by one in Archives of Support Questions (Read Only)

Jolt transform for moving json message to subset without mapping all the fields one by one

saravanan_sastr — Fri, 17 Aug 2018 03:48:17 GMT

I'm to Jolt transformation. I have a simple requirement to transform a json message, were I have to move the contents of the message to a subset without mapping the filed one by one. Input message: { "primary": { "value": 4 }, "quality": { "value": 3 } } Expected Output: { Data:{ "primary": { "value": 4 }, "quality": { "value": 3 } } }.,HI, I am looking to convert a json message using Jolt. it is a simple transformation, were i have to move the entire json message to a subset without mapping field by field

@Matt Burgess

Re: Jolt transform for moving json message to subset without mapping all the fields one by one

Shu_ashu — Sun, 18 Aug 2019 02:08:10 GMT

@Saravanan Subramanian

Try with below Jolt Spec:

[
  {
    "operation": "shift",
    "spec": {
      "*": "Data.&"
    }
  },
  {
    "operation": "default",
    "spec": {
      "Data": {}
    }
  }
]

Input:

{
  "primary": {
    "value": 4
  },
  "quality": {
    "value": 3
  }
}

Output:

{
  "Data" : {
    "primary" : {
      "value" : 4
    },
    "quality" : {
      "value" : 3
    }
  }
}

Another way of doing this is using Replace Text processor by capturing all the content of flowfile and replacement value as

Search Value

(^.*$)

Replacement Value

{ "Data": $1 }

Character Set

UTF-8

Maximum Buffer Size

1 MB

Replacement Strategy

Regex Replace

Evaluation Mode

Entire text

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Re: Jolt transform for moving json message to subset without mapping all the fields one by one

saravanan_sastr — Sun, 19 Aug 2018 06:40:34 GMT

Thanks very much @Shu for your solution . I managed to find a way which is almost similar to yours.