Jersey / MOXy任意JSON属性

Question

I have a bean with an arbitrary JsonValue property which I need to marshal/unmarshal from JSON.

public class MyBean {
    public String name;
    public JsonValue data;
}

Since JsonValue is the standard javax.json.JsonValue , I was expecting MOXy to marshal/unmarshal it out of the box, instead I got a plain string:

{
  "name": "foo",
  "data": "{\"some\":\"json\"}"
}

where I was expecting this:

{
  "name": "foo",
  "data": {
    "some": "json"
  }
}

When unmarshalling, data becomes null . How can I use JsonValue s and get MOXy manage them like expected?

(I need to stick with default Jersey/MOXy, so no use of other libraries.)

Answer 1

Note: this is not an answer (solution for the OP). I typed it out before I read "I need to stick with default Jersey/MOXy" . Was going to change to a comment, but there's too much stuff. I'll just leave it up for future readers.

There is a different provider for the javax.json classes. MOXy doesn't know how to handle them the way you expect. Without looking at any source code I would guess that what you are seeing is the value of toString() from the JsonValue instance. This is what will happen if the type can't be handled. You'll just get a toString() call.

Even if you add the dependency I linked to, you still have the problem that different providers don't interact with each other. What would need to happen is that in the middle of MOXy serializing the MyBean instance, if it sees a javax.json object, it tries to look for a different provider to handle it. It just doesn't work like that. Only one provider will be used.

The only solution I can think of is to instead of using MOXy, use Jackson, which has a module that supports javax.json . If you register that module with Jackson, it will know how to handle the javax.json types, "mid-serialization". You can have a look at this answer , which describes the step you should take to make it work with Jackson.