Unfortunately handling of TypeIdResolver is quite strongly coupled
with that of `TypeResolverBuilder`, and your best route would probably
be via annotation introspector. Although I actually like your approach
above: did not know it would actually work (I spent some time back in
the day trying to figure out if implementing annotation types via
non-annotation declaration works... didn't think it did).
Anyway, method to override would be
public TypeResolverBuilder<?> findTypeResolver(MapperConfig<?> config,
AnnotatedClass ac, JavaType baseType) { }
and you should be able to just use base implementation, but call
`init(...)` on builder instance if one found, to override default
resolver.
This is not optimal of course.
One more existing facility is method
public ObjectMapper setDefaultTyping(TypeResolverBuilder<?> typer) { ... }
in ObjectMapper. This does let you control all type id aspects,
including type id resolution, but is quite a bit of work.
-+ Tatu +-
On Tue, Nov 29, 2016 at 5:40 AM, Paolo Bazzi <paolo.ba...@gmail.com> wrote:
> Hi,
>
> I have a question regarding a custom TypeIdResolver. Is there a possibility
> to register a custom TypeIdResolver class or instance on the used
> ObjectMapper instance, without having to annotate the serialized beans with
> @JsonTypeIdResolver annotation?
>
> Background information: We use the serialized beans as interface between
> multiple systems and do not wan't to have a dependency to jackson-databind
> on the maven module providing the interface beans. Instead we would prefer
> to have the dependendy to jackson-databind only within the code, which
> actually performs the serialization/deserialization.
>
>
> A rather hacky workaround would be to intercept the AnnotationIntrospector
> as follow. But a programmatic way to register the custom TypeIdResolver
> would be preferred.
>
>
> ObjectMapper mapper = new ObjectMapper();
>
> mapper = mapper.setAnnotationIntrospector(new
> JacksonAnnotationIntrospector() {
> private static final long serialVersionUID = 1L;
>
> @SuppressWarnings("unchecked")
> @Override
> protected <A extends Annotation> A _findAnnotation(Annotated
> annotated, Class<A> annoClass) {
> A annotation = super._findAnnotation(annotated, annoClass);
> if (JsonTypeIdResolver.class.equals(annoClass) && annotation ==
> null) {
> return (A) new JsonTypeIdResolver() {
> @Override
> public Class<? extends Annotation> annotationType() {
> return JsonTypeIdResolver.class;
> }
>
> @Override
> public Class<? extends TypeIdResolver> value() {
> return CustomTypeNameIdResolver.class;
> }
> };
> }
> return annotation;
> }
> });
>
>
> Regards,
> Paolo
>
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