[FIXED] Does Jackson serialize getter property for an undefined field?

Issue

I have a class with the following fields and their respective getters, plus an additional method getTotalBalance for which I don't have any field but a custom implementation.

    public class demo{
    private String balance;
    private String blockedBalace;
    private String futureBalance;
    private String availableBalance;
    //getters for previous fields
    public String getTotalBalance(){
    //something..
    }

When I serialize an object of this class I get the following JSON output.

     {
      "balance": "12.30",
      "blockedBalance":"23.45",
      "futureBalance" :"56.22",
      "availableBalance" :"12.30",
      "totalBalance" : "34.11"
     }

Even if I didn't declare a field for totalBalance, I've got this serialized in the end. How is it possible?

Solution

Jackson by default uses the getters for serializing and setters for deserializing.

You can use @JsonIgnore over your getter method to ignore it, OR you can configure your object mapper to use the fields only for serialization/des:

ObjectMapper objectMapper = new ObjectMapper();

objectMapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.NONE);
objectMapper.setVisibility(PropertyAccessor.FIELD, JsonAutoDetect.Visibility.ANY);

Answered By - Bahij.Mik
Answer Checked By - Dawn Plyler (JavaFixing Volunteer)