rest-binding quickstart - need help with returning response in JSON

[ross.stockman]

I am using the rest-binding quickstart to demo a simple rest service that will return a json response on a GET request but I am not getting the response that I am expecting. First I modified the WarehouseResource class so that the @GET method would return a json result:

@GET

@Path("{itemId}")

@Produces({"application/json"})

public Item getItem(@PathParam("itemId") Integer itemId);

I also added an additional field to the Item class that for the purposes of this demo will always return null:

@XmlAccessorType(XmlAccessType.FIELD)

@XmlRootElement(name = "item")

public class Item {

   @XmlElement(name = "itemId", required = true)

    private Integer _itemId;

    @XmlElement(name = "changedName", required = false)

    private String _name;

    @XmlElement(name = "count", required = false)

    private String _count;

...

}

Then I deploy and call the PUT method: http://localhost:8080/rest-binding/warehouse/1/testing

Then I call the GET method http://localhost:8080/rest-binding/warehouse/1

I get the following response.

    {

       "count": null,

       "itemId": 1,

       "name": "testing"

    }

The two problems I need to solve (#2 being highest priority):

1. the jaxb annotations seem to be ignored when marshalling in json because the "name" field in the response should have been called "changedName" as indicated in the @XmlElement. Is there a way to use jaxb annotations to map the appropriate field names in the json response or is there a way to add a custom marshaller to format the json response?

2. the "count" field is included in the response even though it has a null value. Is there a way to ignore or omit null fields so they are not included in the json response?

FYI - if I set @Produces back to "application/xml" then the field names are being set as expected from the @XmlElement annotations and the null fields are not included in the response as expected.

[ross.stockman]

I found a solution. I am now getting the json response that is fully utilizying the jaxb annotations and is supressing null fields. I added the following dependency to the pom:

<dependency>

                              <groupId>org.jboss.resteasy</groupId>

                              <artifactId>resteasy-jackson-provider</artifactId>

                              <version>2.3.5.Final</version>

                              <scope>provided</scope>

</dependency>

Then add the following @NoJackson annotation to the jaxb annotated classes.

import org.jboss.resteasy.annotations.providers.NoJackson;

...

@XmlAccessorType(XmlAccessType.FIELD)

@XmlRootElement(name = "item")

@NoJackson

public class Item {

   @XmlElement(name = "itemId", required = true)

    private Integer _itemId;

    @XmlElement(name = "changedName", required = false)

    private String _name;

    @XmlElement(name = "count", required = false)

    private String _count;

...

}

[kcbabo]

Thanks for posting your solution back to the forum.