Is it possible to do this kind of transfer ?

Input: { "AA": [ { "A": "10", "B": "20", "C": "90", "D": "10" } ] }

Expected Output: { "AA": [ { "A": "red", "B": "yellow", "C": "black", "D": "red" } ] }

Question: Can we do a logic check in the spec? to get the expected result

• if the value <=10, return red,
• if the value >10, value <90 return yellow
• if the value >=90, return black.

[milosimpson]

Start simple / don’t need a spec driven transform.

This is assuming that the input data is just a single top level map with “A”, “B”, etc as keys.

public class MyTransform implements Transform {

  @Override
  public Object transform(Object input) {
     if ( ! input instanceof Map) {  return input; }

    Map<String, Object> inputMap = (Map<String,Object>) input;

    // psudocode
    int A = Integer.valueOf( inputMap.get("A") );

    if ( A <= 10 ) {
       inputMap.put("A", "red" );
    }
    /// etc
  }
}

[milosimpson]

Yes, but you would have to write it. Implement the Transform Interface.

And then you can call your Transform by using it’s fully qualified class name as the “operation”.

Something like

[
  {
    "operation": "shift",
    "spec": {
      ...
    }
  },
  {
    "operation": "com.example.jolt.RedYellowBlackTransform"
  },
  {
    "operation": "default",
    "spec": {
      ...
    }
  }
]