Lombok @Builder interferes with Jackson @JsonUnwrapped

Springfox version [2.8.0] com.fasterxml.jackson version [2.9.2] Spring 1.5.9

Language {JAVA}

A combination of Lombok @Builder and the request sample in swagger-ui makes the Jackson @JsonUnwrapped annotation not be followed

A Spring resource class with the following method

    @ApiResponses({
            @ApiResponse(code = 201, message = "A new jill is initiated",
                    response = Jill.class),
            @ApiResponse(code = 400, message = "Wrong data")
    })
    @PostMapping(
            value="/jill",
            produces = MediaType.APPLICATION_JSON_UTF8_VALUE,
            consumes = MediaType.APPLICATION_JSON_VALUE,
            headers = "Accept=application/json"
    )
    @ResponseBody
    @ResponseStatus(HttpStatus.CREATED)
    public Jill jill(@ApiParam(value = "data", required = true)
                    @Valid @RequestBody Jack jack) {
        return Jill.builder()
                .amt(ParentType.builder()
                        .parent(ChildType.builder()
                                .value("one")
                                .currency("EUR")
                                .build())
                        .build())
                .build();
    } 

and Data classes “request” Jack.class:

@Data
@Builder
public class Jack {

    @JsonUnwrapped
    @JsonProperty("amount")
    private ParentType amt;

    @JsonUnwrapped
    public void setAmt(ParentType amt) {
        this.amt = amt;
    }

    @JsonUnwrapped
    public ParentType getAmt() {
        return amt;
    }

}

ParentType.class

@Data
@Builder
public class ParentType {

    @JsonProperty("parent")
    private ChildType parent;
}

ChildType.class

@Data
@Builder
public class ChildType {

    @JsonProperty("value")
    private String value;

    @JsonProperty("currency")
    private String currency;

}

Response Jill.Class that apparently works:

@Data
@Builder
public class Jill {

    @JsonUnwrapped
    @JsonProperty("amount")
    private ParentType amt;

}

swagger-ui outputs in the “request” example field:

{
  "amount": {
    "parent": {
      "value": "string",
      "currency": "string"
    }
  }
}

and the “response” example:

{
  "parent": {
    "value": "string",
    "currency": "string"
  }
}

I can remove the @Builder from the request Jack.class and it will output the correct json model with the correct unwrapped object

I tried to overwrite the inner Builder class in the Jack.clas but I failed to succeed.

[gnespolino]

Following workaround seems to work:

@Getter
@Builder
@RequiredArgsConstructor // Jackson will deserialize using this and then invoking setter
@AllArgsConstructor(onConstructor = @__(@JsonIgnore)) // lombok's builder will use this
public class Parent {

    @Setter(PRIVATE) // to keep immutability
    @JsonUnwrapped
    private Child child;
    private final String anotherField;

}

[dilipkrish]

Im not very familiar with how lombok serialization works, great you found a workaround, sorry I couldnt be of much help