RESTEasy + Spring + Jackson + Jaxb - jaxb

Question

I am trying to serialize JAXB annotated class with Jackson using RESTEasy. By default ResteasyJacksonProvider is configured to use JACKSON annotation only. Is there a way to configure ResteasyJacksonProvider to use JAXB annotation using spring? There are couple of programmatic ways but would prefer if there is some spring configuration.
Couple of ways I am thinking of
Use ContextResolver for ObjectMapper type to return ObjectMapper configured to use JaxbAnnotationIntrospector instead of JacksonAnnotationIntrospector.
Extend ResteasyJacksonProvider and pass JAXB annotation during construction.
Any other way?

Answer 1

Well the first option of using ContextResolver works but I still think there should be an easier way to do this just by some configuration.

Answer 2

You can get this from the configuration only, no need to program anything special.
Here's how to:
First set your configuration right, I use Jackson + JAXB, both set under ContentNegotiatingViewResolver bean:
<bean class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">
<property name="order" value="1"/>
<property name="mediaTypes">
<map>
<entry key="xml" value="application/xml" />
<entry key="json" value="application/json" />
</map>
</property>
<property name="defaultViews">
<list>
<bean class="org.springframework.web.servlet.view.xml.MarshallingView">
<property name="marshaller">
<oxm:jaxb2-marshaller id="marshaller">
<oxm:class-to-be-bound name="com.shay.dashboard.data.structure.page.PageObject" />
<oxm:class-to-be-bound name="com.shay.dashboard.data.structure.tab.TabObject" />
<oxm:class-to-be-bound name="com.shay.dashboard.data.structure.section.SectionObject" />
<oxm:class-to-be-bound name="com.shay.dashboard.data.structure.element.nonembedded.ElementObject"/>
<oxm:class-to-be-bound name="com.shay.dashboard.data.structure.element.embedded.EmbeddedElementObject"/>
<oxm:class-to-be-bound name="com.shay.dashboard.data.structure.chart.common.ChartManager"/>
</oxm:jaxb2-marshaller>
</property>
</bean>
<bean class="org.springframework.web.servlet.view.json.MappingJacksonJsonView"/>
</list>
</property>
</bean>
Notice that under the marshaller I set the oxm:class-to-be-bound - those are the classes to be bound by JAXB.
Now for the module, I used ordinary annotation package (javax.xml.bind.annotation), non marshaller specific. Jackson Json and JAXB both know how to read it.
For example:
#XmlAccessorType(XmlAccessType.NONE)
#XmlRootElement(name="page")
public class PageObject implements ComponentTypeObject{
#XmlAttribute(name="name")
private String name;
#XmlAttribute(name="id",required=true)
private String id;
#XmlElements({#XmlElement(name="tab", type=TabXmlAdapter.class)})
private List<TabXmlAdapter> tabRef;
Finally the controller for your MVC needs to return a model and view:
#RequestMapping(value="/get_page", method = RequestMethod.GET)
public ModelAndView initPage()
{
ModelAndView mav = null;
try
{
PageObject myPage = (PageObject) Utilities.getUtilities().loadObjectFromFile(XmlComponentType.page);
mav = new ModelAndView("page","page",myPage);
}
catch (Exception e)
{
e.getMessage();
}
return mav;
}
Now while calling your URL ending with .json you'd get the JSON representation, and with .xml - and XML. Both are translated by the viewer, provided you gave the correct mapping when annotating the module.