Hi Simon,
found a bug in Jersey that causes your problem (see [1]). There is a
workaround however - register JacksonJsonProvider ([2]) in your app as
well and your ObjectMapper should be used:
packages("edu.kit.tm.cm.sc");
register(JsonProvider.class);
register(JacksonJsonProvider.class);
[1]
https://java.net/jira/browse/JERSEY-2335
[2]
https://github.com/FasterXML/jackson-jaxrs-providers/blob/master/json/src/main/java/com/fasterxml/jackson/jaxrs/json/JacksonJsonProvider.java
HTH,
Michal
On 14.01.2014, 01:03 , Simon Herter wrote:
> Hi Michal,
>
> thank you for your response. I followed your instructions and removed
> the dependency on "jersey-media-json-jackson".
> Unfortunately that doesn't change anything. It seems that the default
> Jackson provider is still used and not my own one.
>
> I pushed my changes, could you have another look at it?
> https://github.com/ne0h/proseminar2013/tree/jsonprovider/server/Java/SmartCampusServer/
>
>
> With best thanks
> Simon
>
> Am 13.01.2014 22:21, schrieb Michal Gajdos:
>> 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
>>>
>>
>