@JsonInclude(NON_EMPTY)
@JacksonXmlRootElement(localName = "problem", namespace = ProblemDetailJacksonXmlMixin.NAMESPACE)
public interface ProblemDetailJacksonXmlMixin {

	/** RFC 7807 (obsoleted by RFC 9457) namespace. */
	String NAMESPACE = "urn:ietf:rfc:7807";


	@JacksonXmlProperty(namespace = NAMESPACE)
	URI getType();

	@JacksonXmlProperty(namespace = NAMESPACE)
	String getTitle();

	@JacksonXmlProperty(namespace = NAMESPACE)
	int getStatus();

	@JacksonXmlProperty(namespace = NAMESPACE)
	String getDetail();

	@JacksonXmlProperty(namespace = NAMESPACE)
	URI getInstance();

	@JsonAnySetter
	void setProperty(String name, @Nullable Object value);

	@JsonAnyGetter
	@JacksonXmlProperty(namespace = NAMESPACE)
	Map<String, Object> getProperties();

}

@SuppressWarnings("serial")
private static class MyProblemDetail extends ProblemDetail {

	private static final long serialVersionUID = 848059476504348430L;

	public MyProblemDetail(HttpStatus status) {
		super(status.value());
	}
}

@Test
void test() {
	XmlMapper mapper = XmlMapper.builder()
			.addMixIn(ProblemDetail.class, ProblemDetailJacksonXmlMixin.class)
			.build();
	MyProblemDetail problemDetail = new MyProblemDetail(HttpStatus.BAD_REQUEST);
	System.out.println(mapper.writerFor(MyProblemDetail.class).writeValueAsString(problemDetail));
}