jsinterop

[Eric Nissan]

sorry if this has been answered, I just started using jsinterop in gwt 2.8.  What is the recommended way populate data into a jsinterop javascript object from my server.  Assuming I have Json, do we still use OverlayTypes?  or is there a better way to do it?

Always appreciative,

Eric

[Ümit Seren]

This works:

{'somecollection':['String1','String2'],'somestring':'text'}

@JsType(isNative = true,namespace = JsPackage.GLOBAL,name="Object")
public interface Data {
    @JsProperty
    String[] getSomecollection();
    @JsProperty
    String getSomestring();
}

Data data = JsonUtils.safeEval(json).cast();

[Eric Nissan]

Thanks a ton!  that worked.

followup, how do I set a List<Data>?

I tried to use JsArray but that requires a JavaScriptObject, which Data is not.

Thanks,

Eric

[Ümit Seren]

I think you you have to use a normal array: Data[]

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[Eric Nissan]

I tried that also, but

Data[] thing = JsonUtils.safeEval(response.getText()).cast();

does not compile as Data[] is not a JavaScriptObject

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[Ümit Seren]

AFAIK you can't serialize an array directly. You have to put it into a wrapper object. 

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[Eric Nissan]

I don't know if this is the best way, but I got it to work by making my own implementation of  jsArray.

I changed the generic definition from 

public class JsArray<T extends JavaScriptObject> extends JavaScriptObject {

to 

public class JsArray<T> extends JavaScriptObject

which worked with my jsinterop interface.

the problem I see is that although the documentation says an interface market JsType will be treated as a JavaScriptObject when casting, that does not help for using it in place of a generic.

I don't know what will blow up from this, but it seems to work for me.  If there is a better way to do this, I am all ears :)

Thanks,

Eric

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[Goktug Gokdogan]

On Fri, Mar 4, 2016 at 5:18 AM, Eric Nissan <eric....@gmail.com> wrote:

I tried that also, but

Data[] thing = JsonUtils.safeEval(response.getText()).cast();

does not compile as Data[] is not a JavaScriptObject

Data[] thing =  (Data[])(Object) JsonUtils.safeEval(response.getText());

should work. Also if you choose do define your own Json.parse accessor, you won't need the cast:

@JsMethod(namespace="JSON")

private static native <T> T parse(String text);

 

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[Eric Nissan]

Thank You.  I forgot about that doc you had written.  Helped me tons!

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