Tuesday, November 21, 2017

Re: JsInterop Shared Model + REST API


If I go with T Broyer's suggestion of making User extend JavaScriptObject then would interop-utils be able to handle an array property User[] users within User for deserialization?
I'm trying to work around the issue of having a list deserialized as its correct type.  Ultimately I'd like to get my User[] back in browser JavaScript and be able to do
var users = ...deserialized User[]
where getValue() is a @JsMethod

I'm realizing now that I can't do that unless @JsType(isNative = false because overlay methods can't be accessed from JavaScript.  Doing that causes a casting issue when using gwt.interop.utils.client.JSON to parse my incoming JSON string.

On Saturday, November 18, 2017 at 7:02:37 AM UTC-5, Paul Stockley wrote:
gwt-interop-utils shows one way of doing it. This assumes you are OK using intermediate collection types.

On Saturday, November 18, 2017 at 3:52:09 AM UTC-5, Chris L wrote:
I'm trying to create a shared model in my GWT 2.8.2 application that I can use both at the server and in GWT client code.

My research/Google Fu tells me that this might be possible with JsInterop but since I'm new to JsInterop I'm just not sure.
I've done some experiments but I've run into a couple of issues with the biggest being that I can't have my model accessor methods if I make the model native.  The compiler tells me that they have to be native or abstract.

What I'd like to do with my model is:
public class User {
    private double id;
    private String code;
    private String name;

    public User() {

    public User(double id, String code, String name) {

        this.id = id;
        this.code = code;
        this.name = name;

    public double getId() {
        return id;

    public double setId(double id) {
        this.id = id;

Then in my GWT application I'd like to do this:

    public class JsTypes {

        public static native <T> T getJsTypeObject(JavaScriptObject result)/*-{
            return result;

    //called after REST response from server
    private void onCallback(String json) {
Console.log("JSON:" + json);
JavaScriptObject result = JsonUtils.safeEval(json);
User user = JsTypes.getJsTypeObject(result);
        //do something with user

Any ideas or suggestions would be greatly appreciated.

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