customize jackson objectMapper

[amalagaura]

I wanted to use JacksonMixInAnnotations to customize the serialization of JSON objects which I cannot control via annotations. It means I need access to the objectMapper instance.

Objectmapper is available via the getObjectMapper method implemented by JacksonJsonEngine.

If I want to override it, do I need to duplicate the JacksonBaseEngine code from pippo-jackson and then add another service initializer? I think I cannot include the pippo-jackson jar because it will cause JacksonJsonEngine to be loaded with the default objectMapper?

Thank you,

[decebals]

@gitblit Can you take a look please?

[gitblit]

@amalagaura I would...

1. include the pippo-jackson dependency
2. subclass JacksonJsonEngine and override getObjectMapper()
3. call application.getContentTypeEngines().setContentTypeEngine(new CustomJacksonEngine());

[amalagaura]

Thank you. That was my first thought as well, but I was concerned it would register multiple contentTypeEngines because of the initializers.

But I think you are saying that the pippo-jackson would get initialized and register the default but my code would be in my application therefore since setContentTypeEngine writes to a map it would just get overwritten. (sorry, thinking out loud I guess).

thank you

[ab2971082]

ok, thanks!

[decebals]

Some code from #376:

public class MyApplication extends Application {

    public MyApplication() {
        JacksonJsonEngine customEngine = new JacksonJsonEngine() {

            @Override
            public void init(Application application) {
                super.init(application);

                objectMapper.registerModule(new Jdk8Module());
                objectMapper.registerModule(new GuavaModule());
            }

        };
        customEngine.init(this);
        getContentTypeEngines().setContentTypeEngine(customEngine);
    }

}