Hi Pengfei,
I think it is a config issue on your side.
Have just quickly tried to tweak our jacksonjsonprovider example [1].
I changed the MyObjectMapperProvider.getContext method to:
--8<--
@Override
public ObjectMapper getContext(Class<?> type) {
ObjectMapper result = new ObjectMapper();
result.configure(Feature.WRAP_ROOT_VALUE, true);
AnnotationIntrospector jaxbIntrospector = new
JaxbAnnotationIntrospector();
AnnotationIntrospector jacksonIntrospector = new
JacksonAnnotationIntrospector();
final Pair combinedIntrospector = new
AnnotationIntrospector.Pair(jaxbIntrospector, jacksonIntrospector);
result.getDeserializationConfig().setAnnotationIntrospector(combinedIntrospector);
result.getSerializationConfig().setAnnotationIntrospector(combinedIntrospector);
return result;
}
-->8--
as suggested by [2], and the JAXB annotation value gets reflected by the
output JSON data.
No need for any redundant annotations.
HTH,
~Jakub
[1]
http://download.java.net/maven/2/com/sun/jersey/samples/jacksonjsonprovider/1.8-SNAPSHOT/jacksonjsonprovider-1.8-SNAPSHOT-project.zip
[2]
http://wiki.fasterxml.com/JacksonJAXBAnnotations
On 03/15/2011 08:48 PM, Pengfei Di wrote:
> Hi Tatu,
>
> thanks a lot for the reply. I found an article [1] about the jackson
> annotations, which says that it is possible to configure jackson to
> use name property of @XmlRootElement.
>
> "@link javax.xml.bind.annotation.XmlRootElement Jackson 1.7
> <http://wiki.fasterxml.com/JacksonRelease17> allows this to be
> recognized when root-value wrapping is enabled, and JAXB annotation
> introspector is used."
>
> Now I do have the class name included in the json representation,
> however, it seems the name specified after @xmlRootElement is not
> recognized by jackson.
> What I have done now is using 2 annotations, which of course is not a
> good solution.
>
> @@JsonTypeName( value = "account" )
> @XmlRootElement( name = "account" )
> public class MyAccount
> {
> int x;
> }
>
> Best Regards
> Pengfei
>
> [1] http://wiki.fasterxml.com/JacksonJAXBAnnotations
>
>
>
> On 03/15/2011 06:25 PM, Tatu Saloranta wrote:
>> On Tue, Mar 15, 2011 at 8:54 AM, Pengfei Di<pengfei.di_at_match2blue.com> wrote:
>>> Hello,
>>>
>>> I tried to rename the root element of a jaxb class, that is easy for XML
>>> representation. However, it seems impossible for JSON representation.
>>> 1. put a JAXBContextResolver, as written in the Example5.5 of jersey guide.
>>> 2. add jackson 1.7.0 into the pom.xml. (jackson-core-lgpl 1.7.0 and
>>> jackson-mapper-lgpl 1.7.0)
>>> Did I miss something?
>>>
>>> The JAXB class looks like:
>>> @XmlRootElement( name = "account" )
>>> public class MyAccount
>>> {
>>> int x;
>>> }
>> When using Jackson, there will not be a root element (JSON structure
>> differs from XML), so you might not be using POJO mapping with Jersey?
>> Other json producing methods do add wrapper property.
>>
>> -+ Tatu +-
>
>
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> Pengfei Di
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