使用ContainerResponseFilter中的Moxy进行JSON编组

Question

I'm using Moxy in my Jersey (2.7) project basically just to marshall my objects to JSON when the service issues a response. It works fine, but now I am also using ContainerResponseFilter to make some changes on every response issued and I am not sure how to unmarshall the content of the request body into an object, which is something I need.

Specifically:

• i've just registered Moxy in a ResourceConfig instance: register(MOXyJsonProvider.class)
• a class is using JAXB annotations, so when I set an instance of the class in Response.entity() it gets transformed into JSON properly

• the request body (also JSON) also gets unmarshalled into an object when I set it as a method paramether, for instance:

  @Consumes(MediaType.APPLICATION_JSON) public Response getSomething( MyClass instance ) {

However inside a ContainerResponseFilter I can access the request body like so,

InputStream body = requestContext.getEntityStream()

but I'm not sure if it's possible to have this also automatically converted into an object. The information I need is relatively simple, so I guess I could parse JSON in another way, but I'm curious.

I've tried searching, but I didn't find it.

Answer 1

In your ContainerReponseFilter, you can do something like this:

public class ApplicationResponseFilter implements ContainerResponseFilter {

    @Override
    public void filter(final ContainerRequestContext request,
        final ContainerResponseContext response) throws IOException {

        // your code
        response.getEntity();

    }
}

which converts it to your object with JAXB annotations. I was not doing it in my responseFilter, but I've just debugged it and it works.