In UglifyJS2 they use Object.prototype.hasOwnProperty.call(obj, prop) to determine if the object has that property defined, others like LessCss use obj.hasOwnProperty(prop) so I was previously able to avoid implementing JSObject and just add a hasOwnProperty method onto my POJO... but in UglifyJS2 they use a for(i in obj) and the prototype call so I figured I had to implement JSObject now I did and ended up finding...
jdk.nashorn.internal.objects.NativeObject.hasOwnProperty(self, v) only accepts a ScriptObject or a wrapped Boolean, Number, Object[], double[], int[], or ArrayData... My guess is this should also support JSObject.hasMember() Searching through NativeObject.java I actually don't find a single reference of JSObject it maybe possible there are a few other area's needing JSObject support. -Art
