Hi Simon,
you have dependency on both Jackson 1.x (via jersey-media-json-jackson)
and Jackson 2.x (directly in your pom.xml). ObjectMapper class doesn't
seem to be in the same package in Jackson 1
(org.codehaus.jackson.map.ObjectMapper) than it is in Jackson 2 (
com.fasterxml.jackson.databind.ObjectMapper). You have created
ContextResolver for the latter (Jackson 2) but it's possible that
Jackson 1 is used to (un)marshall your entities (and ContextResolver is
not found). Try to remove dependency on jersey-media-json-jackson (+
remove registration of JacksonFeature) and run your app again (MBR/MBW
from Jackson 2 will still get registered via META-INF/services mechanism).
Michal
On 13.01.2014, 19:59 , Simon Herter wrote:
> Hi,
>
> I have some problems when using my own @Provider. I'm using Jackson
> for JSON processing and all works well but I can't figure out, how to
> modify the jackson content provider.
>
> I registered my own provider as shown in documentation
> (https://jersey.java.net/documentation/latest/media.html#json.jackson)
> but the output does not change.
>
>
> @Provider
> @Produces(MediaType.APPLICATION_JSON)
> public class JsonProvider implements ContextResolver<ObjectMapper>{
>
> final ObjectMapper om;
>
> public JsonProvider() {
> om = new ObjectMapper();
> om.enable(SerializationFeature.INDENT_OUTPUT);
> }
>
> @Override
> public ObjectMapper getContext(Class<?> type) {
> return om;
> }
> }
>
>
>
> @ApplicationPath("/")
> public class App extends ResourceConfig {
>
> public SmartCampusServer() {
> packages("package");
> register(JsonProvider.class);
> register(JacksonFeature.class);
> }
> }
>
> I'm using recent stable versions of jackson and jersey.
> Full Code is available as maven project on github
> https://github.com/ne0h/proseminar2013/tree/jsonprovider/server/Java/SmartCampusServer/
>
> Simon Herter
>