Java : Convert Object consisting enum to Json Object

Question

I am using org.json library to convert Object to Json format. Kindly check the below code snippet.

public enum JobStatus implements Serializable{      INCOMPLETE,      INPROGRESS,      ABORTED,      COMPLETED }  public class Job implements Serializable {     private string id;     private JobStatus status;     ... }  ...  // Create Job Object Job job = new Job("12345", JobStatus.INPROGRESS);  // Convert and print in JSON format System.out.println(new JSONObject(job).toString()); 

It shows the output like this :

 {"id":"12345", "status" : {}} 

It shows blank and adds Curly bases. What does it mean? Is anybody gone through this problem?

Answer 1

First of all I highly recommend do not use this library (org.json), this is very old and unsupported (as i know) library. I suggest Jackson or Gson.

But if you really need JSONObject, you can add getter into enum:

 public enum JobStatus implements Serializable{     INCOMPLETE,     INPROGRESS,     ABORTED,     COMPLETED;      public String getStatus() {         return this.name();     } } 

result of serialization:

{"id":"12345","status":{"status":"INPROGRESS"}} 

As I know, JSONObject don't support correct serialization of enums which not have any additional data inside.

Answer 2

ObjectMapper mapper= new ObjectMapper();  new JSONObject(mapper.writeValueAsString(job)); 

would do the trick. Now Enums and DateTime types looks normal and is converted properly in json objects.

I came to this page as a person seeking answer and my research helped me to answer this question.