Re: Dynamic values in json parsing with GWT

On Wednesday, November 15, 2017 at 11:19:56 AM UTC+1, Jens wrote:

Thanks for the early response. Can you give an example of getData(String key) method.

Sure, assuming your values are only strings you can do

public native String getData(String key) /*-{
  return this.data[key];
}-*/;

If your values can also be number, boolean, JS Object you need additional methods, possibly also doing some type checking. 

Given that JSNI won't work in future GWT I would really take a look at jsinterop.base.JsPropertyMap which is a generic class to work on JavaScript objects.

https://github.com/google/jsinterop-base/blob/master/java/jsinterop/base/JsPropertyMap.java

@JsType(isNative = true, name = "Object", namespace = JsPackage.GLOBAL)
public class Result {
  String[] columns; // or JsArrayLike<String>
  JsPropertyMap<String> data;
}

That should be enough (and much much simpler/shorter than with JSNI).

Migrating a JSNI getData(String):String to JsInterop would be quite easy too:

@JsType(isNative = true, name = "Object", namespace = JsPackage.GLOBAL)
public class Result {
  @JsProperty public native String[] getColumns();
  @JsOverlay public String getData(String key) {
    return getData().get(key);
  }
  @JsProperty private native JsPropertyMap<String> getData();
}

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