Deserialization fails with `XmlMapper` and `DeserializationFeature.UNWRAP_ROOT_VALUE`

Simple Test case: https://github.com/dewarim/jackson-xml-debug

Using jackson-dataformat-xml version 2.10.1 @ Java 11

Given: a POJO:

@JacksonXmlRootElement(localName = "Root")
@JsonRootName("Root")
public class Root {

    @JsonProperty("id")
    String id;

    public Root(String id) {
        this.id = id;
    }

    public Root() {
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }
        Root root = (Root) o;
        return Objects.equals(id, root.id);
    }

    @Override
    public int hashCode() {
        return Objects.hash(id);
    }
}

When trying to do

        ObjectMapper mapper = new XmlMapper();
       mapper.enable(DeserializationFeature.UNWRAP_ROOT_VALUE);
        Root deserializedRoot = mapper.readValue(value, Root.class);

I get: com.fasterxml.jackson.databind.exc.MismatchedInputException: Root name ‘id’ does not match expected (‘Root’) for type [simple type, class test.debug.Root] at [Source: (StringReader); line: 1, column: 7] (through reference chain: test.debug.Root[“id”])

[cowtowncoder]

Note: as per #485 the behavior WILL CHANGE for 2.13.0 so that:

• Deserializer WILL AGAIN unwrap root element, but
• Serializer STILL DOES NOT add wrapping

Second issue may be addressed with a later version (2.14 or later) but first we will want to get back to 2.11 baseline compatibility.

[ionel-sirbu-crunch]

@ionel-sirbu-crunch Unwrapping in XML has different semantics than with JSON so that feature does nothing with XML. Fix is to prevent attempts for unwrapping since that will not work the way databind would try to apply it.

For your specific problem, please file a new issue with reproduction (showing what specifically you think is failing) and include information on versions where things appeared to work.

Created https://github.com/FasterXML/jackson-dataformat-xml/issues/485 for that matter. Thank you!