javax.json - Build JsonObject with arraylist and one separated attribute

Question

I have a method that should return a Response with a JsonObject (with arraylist) exactly like the code at the bottem of this article. This is a java @GET method. I know how to build a jsonobject with json.createObjectBuilder like:

 JsonObject jo = Json.createObjectBuilder().add("name", "item").add("user", user.getUser()).build();

But I dont how to build like the code below. So I have to do an add with the name "items", this is an arraylist. Every item has four attributes: id, name, bool and another arraylist reserveItems (reserveItems can be null). After this I have to do an add with name length and value 687.

{
              "items" :[
                           {
                              "id"         : 1,
                              "name"       : "Item1",
                              "bool"       : true,
                              "reserveItems": []
                           },
                           {
                              "id"         : 2,
                              "name"       : "Item2",
                              "bool"       : false,
                              "reserveItem": []
                           }
              ],
              "length"  :687
    }

Answer 1

From the JsonObjectBuilder interface, you can obtain your JsonObject in this way:

                JsonObject value = Json.createObjectBuilder()
                .add("items", Json.createArrayBuilder()
                        .add(Json.createObjectBuilder()
                                .add("id", 1)
                                .add("name", "Item1")
                                .add("bool", true)
                                .add("reserveItems", Json.createArrayBuilder())
                        )
                        .add(Json.createObjectBuilder()
                                .add("id", 2)
                                .add("name", "Item2")
                                .add("bool", false)
                                .add("reserveItems", Json.createArrayBuilder())
                        )
                )
               .add("length", 687)
               .build();

               System.out.println(value);