Disable Jackson mapper for a particular annotation

Question

With Jackson, it's easy to disable all annotations for a given ObjectMapper. Is there a way to only disable one given annotation?

// disable all
ObjectMapper mapper = new ObjectMapper()
mapper.disable(MapperFeature.USE_ANNOTATIONS);

// disable one?
ObjectMapper mapper = new ObjectMapper()
mapper.disable(@JsonIgnore);

Using @JacksonAnnotationsInside, I've defined a custom Jackson annotation and I only want it to be used in certain circumstances.

Answer 1

This the best I've come across. I think I saw it on the Jackson user group forums somewhere.

Essentially it makes a custom annotation introspector, which returns null if it sees that it has a specific annotation (in this case JsonTypeInfo)

JacksonAnnotationIntrospector ignoreJsonTypeInfoIntrospector = new JacksonAnnotationIntrospector() {
            @Override
            protected TypeResolverBuilder<?> _findTypeResolver(
                    MapperConfig<?> config, Annotated ann, JavaType baseType) {
                if (!ann.hasAnnotation(JsonTypeInfo.class)) {
                    return super._findTypeResolver(config, ann, baseType);
                }
                return null;
            }
        };

        mapper.setAnnotationIntrospector(ignoreJsonTypeInfoIntrospector);