java - Spring @RequestBody and Enum value

Question

I Have this enum

public enum Reos {

    VALUE1("A"),VALUE2("B"); 

    private String text;

    Reos(String text){this.text = text;}

    public String getText(){return this.text;}

    public static Reos fromText(String text){
        for(Reos r : Reos.values()){
            if(r.getText().equals(text)){
                return r;
            }
        }
        throw new IllegalArgumentException();
    }
}

And a class called Review, this class contains a property of the type enum Reos.

public class Review implements Serializable{

    private Integer id;
    private Reos reos;

    public Integer getId() {return id;}

    public void setId(Integer id) {this.id = id;}

    public Reos getReos() {return reos;}

    public void setReos(Reos reos) {
        this.reos = reos;
    }
}

Finally I have a controller that receives an object review with the @RequestBody.

@RestController
public class ReviewController {

    @RequestMapping(method = RequestMethod.POST, value = "/reviews")
    @ResponseStatus(HttpStatus.CREATED)
    public void saveReview(@RequestBody Review review) {
        reviewRepository.save(review);
    }
}

If I invoke the controller with

{"reos":"VALUE1"}

There is not problem, but when I invoke with

{"reos":"A"}

I get this error

Could not read document: Can not construct instance of com.microservices.Reos from String value 'A': value not one of declared Enum instance names: [VALUE1, VALUE2] at [Source: java.io.PushbackInputStream@23ce847a; line: 1, column: 40] (through reference chain: com.microservices.Review["reos"]); nested exception is com.fasterxml.jackson.databind.exc.InvalidFormatException: Can not construct instance of com.microservices.Reos from String value 'A': value not one of declared Enum instance names: [VALUE1, VALUE2] at [Source: java.io.PushbackInputStream@23ce847a; line: 1, column: 40] (through reference chain: com.microservices.Review["reos"])"

I undertand the problem, but I wanted to know a way to tell Spring that for every object with Reos enum use Reos.fromText() instead of Reos.valueof().

Is this possible?

Answer 1

I've found what I need. http://chrisjordan.ca/post/50865405944/custom-json-serialization-for-enums-using-jackson.

It was 2 steps.

1. Override the toString method of the Reos enum

@Override
public String toString() {
    return text;
}

2. Annotate with @JsonCreator the fromText method of the Reos enum.

@JsonCreator
public static Reos fromText(String text)

And that's all.

I hope this could help others facing the same problem.