Jolt 在转换后返回 null，但在 http://jolt-demo.appspot.com/#inception 上同样有效

Question

I am trying to transform the below JSON:

From:

{
  "id": 123,
  "name": {
    "firstName": "shiva",
    "lastName": "kumar"
  },
  "dateOfBirth": "11/09/2012",
  "emailId": "mymail@gmail.com",
  "address": {
    "addressLine1": "blr",
    "addressLine2": "KA"
  },
  "salary": 12334
}

to:

{
  "id": 123,
  "email": "mymail@gmail.com",
  "salary": 12334,
  "fullname": {
    "firstName": "shiva",
    "lastName": "kumar"
  },
  "fullAdress": "blr KA"
}

Code: The below code just return null .

    private JSONObject tranformRequest(String json, String specFile){
    
            URI uri = Thread.currentThread().getContextClassLoader().getResource(specFile).toURI();
            String jsonSpec = Files.readAllLines(Paths.get(uri)).stream().collect(Collectors.joining());
            JSONArray jsonArray = new JSONArray(jsonSpec);
            List<Map<String, Object>> list = new ArrayList<>();
            for(int i = 0 ; i < jsonArray.length();i++){
                list.add(jsonArray.getJSONObject(i).toMap());
            }
            Chainr chainr = Chainr.fromSpec(list);//  JsonUtils.classpathToList( "/path/to/chainr/spec.json" );
    
            Object output = chainr.transform( json );
    
            return (JSONObject) output;
        }

pom.xml

         <dependency>
            <groupId>com.bazaarvoice.jolt</groupId>
            <artifactId>jolt-core</artifactId>
            <version>0.1.7</version>
        </dependency>

[

Answer 1

If jolt failed to convert your input JSON return null . So it can be for jolt specification.

Let's use the demo version of the site. Maybe the problem is solved.

Please update your package with version 0.1.1 like the jolt-demo website, and use the below code.

[
  {
    "operation": "shift",
    "spec": {
      "id": "&",
      "name": "fullname",
      "emailId": "email",
      "salary": "salary",
      "address": {
        "*": "&1"
      }
    }
  },
  {
    "operation": "modify-overwrite-beta",
    "spec": {
      "*": "=join(' ',@0)"
    }
  }
]

If you have any problem please say in the comment.