How to override Lombok Setter methods

Question

I'm using lombok in my project and generation Setters and Getters using @Setters and @Getters annotations on top of POJO class. I'm trying to override setters method of a property but it's not working

I want to check if JSON property is Empty or Null i want to set default value in Setter method

@Setter
@Getter
@NoArgsConstructor
@AllArgsConstructor
@Accessors(chain = true)
@ToString
public class DefaultModel {


private String name;
@Setter(AccessLevel.NONE)private String age;    

public void setAge(String age) {
     if(age==null||age.trim().isEmpty()||age.equals("null")) {
        this.age="10";
    }else {
        this.age=age;
    }
}

}

Working scenarios:

        {
"name":"some",
"age":null
     }

     {
"name":"some",
"age":"null"
     }

    {
"name":"some",
"age":"  "
     }

Failed Scenario :

    {
"name":"some"
    }

Output:

DefaultModel(name=some, age=null)

And i'm following this as reference also here , but no luck so far

Answer 1

Either you just hit a bug I've never seen or you're testing it wrong.

An annotation like

@Setter(AccessLevel.NONE) private String age;

on the field level indeed stops the setter from being generated. But given that you're defining a setter, you don't even need it. An explicit @Setter stops the generation, too.

I've just tried your example using Eclipse 4.7.3a and Lombok 1.18.0 and your (buggy) setter gets called. I've been using Lombok a lot over a few years and never encountered such a bug.

Most probably the problem is that your JSON deserializer does not use setters at all. I guess, you're testing something like

DefaultModel defaultModel = deserialize("{\"name\":\"some\"}", DefaultModel.class);

instead of testing the setter directly. And that's the problem.

Answer 2

It possible that JSON deserializer uses constructor generated by Lombok (not setters).

Have a look here: Jackson deserialize default values missing