Is it possible to map a JSON object to a string with Moxy?

Question

Suppose I have a data model like:

public class MyModel {
    private String someString;
    private String someJson; // Data structure owned by client, persisted as a CLOB
}

I'm serving the model via a REST API (Jersey) to a client. I know that I could marshal/unmarshal that to something like:

{
    "someStrong": "foo",
    "someJson": "{ someClientThing: \"bar\", someOtherClientThing: \"baz\"}"
}

But I'm looking for something cleaner. Is there a way that I can marshal/unmarshal that to JSON like this?

{
    someStrong: "foo",
    someJson: {
        someClientThing: "bar",
        someOtherClientThing: "baz"
    }
}

I don't want the server to have to know about the data model for someJson, as it's owned by the client. I just want the server to handle persistence of it - so the server would pass it back and forth between the client and database.

Note: It doesn't need to map directly to a string - as long as it can map to something unstructured (not statically defined on the server) that can be stringified before persistence (and unstringified back to that unstructured object on retrieval).

Answer 1

It's possible if json doesn't have arrays, as in your example:

{ "someClientThing": "bar", "someOtherClientThing": "baz"}

For such simple case the solution is implementation of bidirectional conversion json-string<->org.w3c.dom.Document instance in own DomHandler. Attach the handler to the field:

@XmlRootElement
@XmlAccessorType(FIELD)
    public class MyModel {
    private String someString;
    @XmlAnyElement(value = SomeJsonHandler.class)
    private String someJson; // Data structure owned by client, persisted as a CLOB
}

Enjoy.

Unfortunately there's a big throuble with arrays, because XML Dom doesn't support theirs. After reconversion below json

{ "someClientThing": "bar", "someOtherClientThing": ["baz1","baz2"]}

you will get something like this

{
   "someClientThing": "bar",
   "someOtherClientThing": {value="baz1"},
   "someOtherClientThing": {value="baz2"}
}

Answer 2

Try like this,maybe can help you

public class MyModel {
    private String someString;
    private Map<String, Object> someJson;
}