Web AppBuilder DE - Query a Zipped Shapefile

Question

In Web AppBuilder Developer Edition, is there any way to query a zipped shapefile uploaded by the Add Data widget?

XuanKuai · Accepted Answer

Figured it out myself. Turns out to be simple. Although the feature layer from upload is based on feature collection, hence not possible for server-side query, each feature can still be extracted by the following:

var graphic = this.map.getLayer(layerId).graphics[i];

This contains all the attributes to do a client-side "query".