dropwizard: incorrect json resulting from group of items - json

Question

I am using Dropwizard to deliver a RESTful service. The JSON I EXPECT looks like this:
{"featuredMerchants":
{"featuredMerchant":[
{"browseId":"v1_0_0_1112",
"merchantId":3902,
"priority":1,
"sourceId":"15"},
...,
{"browseId":"v1_0_0_1112",
"merchantId":456,
"priority":4,
"sourceId":"15"}]}}
But the JSON I am GETTING is this:
{"featuredMerchant":[
{"browseId":"v1_0_0_1112",
"merchantId":3902,
"priority":1,
"sourceId":"15"},
...,
{"browseId":"v1_0_0_1112",
"merchantId":456,
"priority":4,
"sourceId":"15"}]}
I have two classes. I have an ApiFeaturedMerchantGroup class that contains a list of ApiFeaturedMerchants.
#JsonRootName("featuredMerchants")
public class ApiFeaturedMerchantGroup {
private List<ApiFeaturedMerchant> apiFeaturedMerchants;
public ApiFeaturedMerchantGroup() {
}
#JsonProperty("featuredMerchant")
public List<ApiFeaturedMerchant> getApiFeaturedMerchants() { return apiFeaturedMerchants; }
public void setApiFeaturedMerchants(List<ApiFeaturedMerchant> apiFeaturedMerchants) { this.apiFeaturedMerchants = apiFeaturedMerchants; }
}
#JsonRootName("featuredMerchant")
public class ApiFeaturedMerchant {
private String browseId;
private int merchantId;
private Integer priority;
private String sourceId;
public ApiFeaturedMerchant() {
}
public String getBrowseId() { return browseId; }
public void setBrowseId(String browseId) { this.browseId = browseId; }
public int getMerchantId() { return merchantId; }
public void setMerchantId(int merchantId) { this.merchantId = merchantId; }
public Integer getPriority() { return priority; }
public void setPriority(Integer priority) { this.priority = priority; }
public String getSourceId() { return sourceId; }
public void setSourceId(String sourceId) { this.sourceId = sourceId; }
}
How do I get the extra level into my JSON, the "featuredMerchants" group that contains the individual "featuredMerchant" items? Do I have the wrong annotations, or am I missing one/some?

Answer 1

It's a setting on ObjectMapperFactory:
ObjectMapperFactory objectMapperFactory = new ObjectMapperFactory();
objectMapperFactory.enable(SerializationFeature.WRAP_ROOT_VALUE);
objectMapper = objectMapperFactory.build();