Return List in REST Web Service

How can return List of Strings in REST Web Services

I am using CXF 2.7.8

I have one method as :

    @GET@Path("/items")@Produces(MediaType.APPLICATION_JSON)public List<String> getItems() {    List<String> list = service.getList();    return list;}

I am getting error as "No message body writer has been found for response class ArrayList."

Option 1

I have also tried to use GenericEntity> and got same error as above

Option 2

I have also created Wrapper class for list as

@XmlRootElement(name = "listWarpper")public class ListWarpper implements Serializable {private static final long serialVersionUID = 1L;private List<String> list;public ListWarpper() {}public ListWarpper( List<String> list ) {    this.list = list;}public List<String> getList() {    return list;}public void setList( List<String> list ) {    this.list = list;}

}

and it works fine but only problem with it is when result have just one item into list then returned json is

{ list: "Only one Item"}

instead of `{list : ["Only one Item"]}

My problem is how can I get returning json in form of as follows no matter if list is empty or containing just one element

{ list : [...]}

or {[...]}