[SOLVED] How converts list objects to JSON in gvnix

How converts list objects to JSON in gvnix

Hi I´m developing new controllers over GVNIX development tool but I don´t understand how it is transforming object list to JSON.

I have seen in the GEO example, the entities list are working with DataTables and the ajax filter it´s working with JSON. The database access are in BatchService that returns object list, but I havent found where the controller get´s this list and returns the JSON.

Can anybody help me to understand how it´s working ?

Thanks

Solution

The conversion is handle by Spring Web MVC based on @RequestMapping and @ResponseBody annotations value through Jaskson Library. (This post talk about it)

In addition, as standard Spring MVC Jackson converter doesn't use the ApplicationConversionService Bean, gvNIX includes a custom converter that uses this bean to serialize and bind some object (as Spring do in standard POST request). You can found this configuration in webmvc-config.xml file:

<bean class="org.gvnix.web.json.Jackson2RequestMappingHandlerAdapter" 
    id="dataBinderRequestMappingHandlerAdapter" p:order="1">
        <property name="objectMapper">
            <bean class="org.gvnix.web.json.ConversionServiceObjectMapper"/>
        </property>
</bean>

Note: Jackson2RequestMappingHandlerAdapter only handles request which @RequestMapping propierties produces and consumes is set to application/json

Good luck!