XmlMapper serializes jsonAppend property twice

[stepince]

XmlMapper is serializing jsonAppend virtual property twice. ObjectMapper for json works correctly.

jackson version: 2.14.1

`
public class VirtualBeanPropertyWriterTest {
@test
public void testJsonAppend() throws Exception {
ObjectMapper mapper = new XmlMapper();
String xml = mapper.writeValueAsString(new Pojo("foo"));
assertEquals("foobar",xml);
}

@JsonAppend(props = @JsonAppend.Prop(name = "virtual", value = MyVirtualPropertyWriter.class))
public static class Pojo {
    private final String name;

    public Pojo(String name) {
        this.name = name;
    }
    public String getName() {
        return name;
    }
}

public static class MyVirtualPropertyWriter extends VirtualBeanPropertyWriter {
    public MyVirtualPropertyWriter() {}

    protected MyVirtualPropertyWriter(BeanPropertyDefinition propDef, Annotations contextAnnotations,
                                      JavaType declaredType) {
        super(propDef, contextAnnotations, declaredType);
    }

    @Override
    protected Object value(Object bean, JsonGenerator jgen, SerializerProvider prov) throws Exception {
        return "bar";
    }

    @Override
    public VirtualBeanPropertyWriter withConfig(MapperConfig<?> config, AnnotatedClass declaringClass,
                                                BeanPropertyDefinition propDef, JavaType type) {

        return new MyVirtualPropertyWriter(propDef, declaringClass.getAnnotations(), type);
    }
}

}
`

output
org.opentest4j.AssertionFailedError:
Expected :<Pojo><name>foo</name><virtual>bar</virtual></Pojo>
Actual :<Pojo><name>foo</name><virtual>bar</virtual><virtual>bar</virtual></Pojo>

[cowtowncoder]

Why discussion? This sounds like a bug report. Also, wrong repo; will transfer, then convert.

EDIT: created issue FasterXML/jackson-dataformat-xml#578 for follow up.

[stepince]

Hi,
I just wanted to verify it was a bug. I wanted to see if there is a work around.
Steve

[cowtowncoder]

It definitely sounds like one, hence bug report. It is ok to file issues even if not 100% certain something is a flaw, if it seems it could well be.
Thanks!