JAX-RS unmarshal JSON sub property to hash map

Question

I have a REST service endpoint that accepts JSON in the following format:

{
  "name": "example",
  "properties": {
    "key1": "val1",
    "key2": "val2"
  }
}

Then I have this class

class Document {
  private String name;

  private Map<String, String> properties;

  ... setters/getters
}

And my REST service method

logger = Logger.getLogger("logger");

@POST
@Consumes(MediaType.APPLICATION_JSON)
Response addDocument(Document document) {
  logger.info(document);
  return Response.ok(200).build();
}

But whenever I post the JSON above it's not unmarshalling my properties. It is always null. The name property is mapped correctly..

I would gladly accept any help/clues.Thanks!

EDIT: I did not mention that I am using glassfish 4.1 and what comes with it. I don't have any lib dependency for marshal/unmarshal.

Which library are you using to convert the POJO to JSON and vice-versa — Ramachandran.A.G, Aug 29 '16 at 14:48
Not using any specific lib. Using glassfish and using whatever comes with it OOB. I have restricted my app to be very flexible and deployable in any EE complaint container. Currently using glassfish 4.1 via docker — stefo0O0o, Aug 29 '16 at 14:59
Can u post your web.xml? Make sure you you have added com.sun.jersey.api.json.POJOMappingFeature to true — lsiva, Aug 29 '16 at 15:03
I will test with the init-param and let you know. But as it turns out I have missed that one. — stefo0O0o, Aug 29 '16 at 15:08
I tried the init-param, nothing changed.. The properties is still null — stefo0O0o, Aug 29 '16 at 15:12

score 0 · Answer 1 · answered Sep 04 '16 at 14:27

0

I just added Gson and created custom entity provider for JSON. It works now as expected, but I would've been more glad to not handle it myself but let the container do it with whatever is configured for JAXB.

answered Sep 04 '16 at 14:27

stefo0O0o

119
1
11

score 0 · Answer 2 · edited May 23 '17 at 12:01

Your JSON, the Java class the JSON will be parsed into and your JAX-RS resource method look fine:

{
  "name": "example",
  "properties": {
    "key1": "val1",
    "key2": "val2"
  }
}

public class Document {

    private String name;
    private Map<String, String> properties;

    // Getters and setters omitted
}

@POST
@Consumes(MediaType.APPLICATION_JSON)
public Response addDocument(Document document) {
    ...
    return Response.ok(200).build();
}

Instead of using Gson as you mentioned in your answer, you could consider using a JSON provider which integrates with Jersey. Jackson is a good choice and Maps should work fine.

For details on how to use Jackson with Jersey, refer to this answer.

JAX-RS unmarshal JSON sub property to hash map

2 Answers2