Using Jackson, how can a list of known JSON properties be obtained for any arbitrary pojo class?

Question

Ideally, it would look much like this:

List props = objectMapper.getKnownProperties(MyPojo.class);

Alas, there is no such met

Answer 1

Depending on your exact needs, JsonFilter could also work (f.ex see http://www.cowtowncoder.com/blog/archives/2011/09/entry_461.html).

And for more advanced cases, BeanSerializerModifier does give you access to actual list of BeanPropertyWriters, which represent individual properties POJO has. From that, you could write a wrapper that enables/disables output dynamically. Or perhaps you can even combine approaches: modifier to get list of possible property names; then FilterProvider to dynamically add filter. Benefit of this would be that it is a very efficient way of implementing filtering.