Using Jaca JsonPath to exclude items from JSON response

Question

I am using the JsonSmartJsonProvider and my JSON looks like this

  {
  "info": {
    "clientCount": 1,
    "compactorVersion": 2,
    "processMonitor": {
      "processList": [
        {
          "name": "java.exe",
          "commandLine": "",
          "pid": 6224
        }
      ]
    }
  }
}

I'm trying to exclude "processList", but keep everything else. I've tried variations on $.info[?(@ noneof ['processMonitor'])], but I always end up with "info" being empty in the response. Is it possible to use JsonPath to do this? The code that is used to do this looks like this:

        DocumentContext document = JsonPath.using(CONFIGURATION).parse(json);
        
        Map<String, Object> result = new HashMap<>();
        paths.forEach((key, value) -> result.put(key, document.read(value)));
        return result;

Answer 1

As mentioned, you are actually looking for a JSON transformation. JOLT is a common library to do just that. A solution can look like this:

import java.util.List;
import com.bazaarvoice.jolt.Chainr;
import com.bazaarvoice.jolt.JsonUtils;
 
public class MyJsonTransformer {
    public static void main(String[] args) throws Exception {
        List<Object> specs = JsonUtils.classpathToList("/spec.json");
        Chainr chainr = Chainr.fromSpec(specs);
 
        Object inputJSON = JsonUtils.classpathToObject("/input.json");
        Object transformedOutput = chainr.transform(inputJSON);
        System.out.println(JsonUtils.toPrettyJsonString(transformedOutput));
    }
}

And a jolt remover spec file like this:

[
  {
    "operation": "remove",
    "spec": {
      "info": {
        "processMonitor": {
          "processList": ""
          }
        }
      }
    }
]

You can try JOLT online with your input and the spec above here. Pretty neat.
The JSON and spec can be defined inline as well. I have not tested this end to end.