Enum, How to rename during (de)serialization?

Question

Hi is it possible to change name of ENUM in Java? For example, I have enum -

public enum CloudType {
    AZURE, OPENSTACK
}

And a class -

public class Env{
   private CloudType cloudType;
}

And during JACKSON parsing, if I give -

{
  "cloudType":"AZURE"
}

Or

{
  "cloudType":"azure"
}

It will give me an Env object with cloudType=AZURE ?

One thread is there (Jackson databind enum case insensitive), but really we need to do this much? Or

@XmlEnumValue("azure")
    AZURE("azure"),

will be enough?

That's not changing the name of an enum, is it? It's just assigning a value to an enum variable. — khelwood, Apr 24 '18 at 10:48
Possible duplicate of [Jackson databind enum case insensitive](https://stackoverflow.com/questions/24157817/jackson-databind-enum-case-insensitive) — Michael, Apr 24 '18 at 10:50
Actually I am doing serialization directly from REST request body which is capable of handling both Json & XML — CR Sardar, Apr 24 '18 at 11:10
Hi, kindly please clarify the question, you are asking for more different things, or there are just missing some clues? Eg. How to rename during (de)serialization ? Because the correct answer can be like `Right click in your IDE to enum / class name and choose refactor - change name` ... Kindly please follow [mcve] and [How to ask](https://stackoverflow.com/help/how-to-ask) At this point, its unclear what are you asking for. — xxxvodnikxxx, Apr 24 '18 at 11:20

Thomas Fritsch · Answer 1 · 2018-04-24T18:17:15.917

You can decouple the Java names of the enum instances from their JSON representations.

You should add a @JsonValue-annotated method to your enum CloudType to tell Jackson which value to use when reading/writing JSON. For that you also need a constructor to initialize this value.

Like this:

public enum CloudType {
    AZURE("azure"),
    OPENSTACK("openstack");

    private final String value;

    private CloudType(String value) {
        this.value = value;
    }

    @JsonValue
    public String getValue() {
        return value;
    }
}

Then Jackson will serialize CloudType.AZURE to "azure",
and deserialize "azure" to CloudType.AZURE.

Enum, How to rename during (de)serialization?

1 Answers1