Use an interface rather than a class. See the note about castability in the javadoc: https://javadoc.io/doc/com.google.jsinterop/jsinterop-annotations/latest/jsinterop/annotations/JsType.html
Rule of thumb is: use a class only if it maps to a "constructor" in JS, i.e. something you'll either create an instance of, or use in an "instanceof" check; for everything else (generally something you get from another API or "receive" in a callback), use an interface. In this case, I think you could also use name="Object". On Monday, January 13, 2025 at 7:47:28 AM UTC+1 [email protected] wrote: > Overlay types do work, and make it a little better: > > public class CrazyGamesUser extends JavaScriptObject { > protected CrazyGamesUser() {} > public final native String getUserName() /*-{ return this.username; }-*/ > ; > public final native String getProfilePictureUrl() /*-{ return > this.profilePictureUrl; }-*/; > } > > However, it would be great if JsInterop just worked, so I could just do: > > @JsType(isNative = true, namespace = JsPackage.GLOBAL) > public static class CrazyGamesUser { > public String username; > public String profilePictureUrl; > } > > Maybe I'm missing something? > On Monday, 13 January 2025 at 4:02:40 pm UTC+11 Craig Mitchell wrote: > >> I'm calling some existing JS that returns a JS Object which I've >> implemented in JsInterop: >> >> @JsType(isNative = true, namespace = "window.CrazyGames.SDK") >> public static class JsUser { >> public native Promise<CrazyGamesUser> getUser(); >> } >> >> I can happily call it: >> sdk.user.getUser() >> .then(user -> { >> // Do something with the user >> return null; >> }) >> .catch_(error -> { >> return null; >> }); >> >> This issue is I'm struggling to work out how to define the return object >> "CrazyGamesUser". The actual JS object is just this: >> { >> "username": "SingingCheese.TLNU", >> "profilePictureUrl": " >> https://images.crazygames.com/userportal/avatars/4.png"; >> } >> >> If I define it like this: >> >> @JsType(isNative = true, namespace = JsPackage.GLOBAL) >> public static class CrazyGamesUser { >> public String username; >> public String profilePictureUrl; >> } >> >> I get a java.lang.ClassCastException. >> >> So if I set the name to "?": >> >> @JsType(isNative = true, name = "?", namespace = JsPackage.GLOBAL) >> public static class CrazyGamesUser { >> public String username; >> public String profilePictureUrl; >> } >> >> Then I get a compile error: >> '?' can only be used as a name for native interfaces in the global >> namespace. >> >> But if I make it an interface, I can't have the member variables. >> >> If I do remove the member variables, it does work, and I can access them >> via some JSNI: >> >> public static native String getUsername(CrazyGamesUser instance) /*-{ >> return instance.username; >> }-*/; >> >> But that's really ugly. What's the correct approach here? >> >> Thanks. >> > -- You received this message because you are subscribed to the Google Groups "GWT Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion visit https://groups.google.com/d/msgid/google-web-toolkit/f51ee1f0-6254-4b6a-b2b2-50dc9935b993n%40googlegroups.com.
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