javascript - DartObject not unwrapped when passed into JsObject.callMethod -

i'm writing dart wrapper js library, hitting on problem:

i'm calling js method mediastream (dart)object parameter. problem is, inside js lib, parameter dartobject, , causes error because it's not mediastream anymore.

jsobject.jsify works on maps , lists, there way jsify object js usage?

after few time think problem, solution mirror api. it's possible create jsobject, approach has been create "binding" object make interface between js , dart. mirror api able analyze object instance create dynamicly binding. hope usefull

the dart file :

import 'dart:js'; import 'dart:mirrors';  typedef dynamic oncall(list);  class varargsfunction extends function {   oncall _oncall;    varargsfunction(this._oncall);    call() => _oncall([]);    nosuchmethod(invocation invocation) {     final arguments = invocation.positionalarguments;     return _oncall(arguments);   } }  jsobject tojsobject(var inst) {   instancemirror im = reflect(inst);   classmirror classmirror = im.type;   jsobject jsobj = new jsobject(context["object"]);    classmirror.declarations.values.where((dm) => dm methodmirror && dm.isregularmethod).foreach((methodmirror method) {         jsobj[mirrorsystem.getname(method.simplename)] = new varargsfunction((args) {            return im.invoke(method.simplename, args).reflectee;         });   });   return jsobj; }  class testclass {   string str;     testclass(this.str);    string getstr() {     return this.str;   }    string tostring() {     return '[myclass instance str: "${this.str}"]';   }    jsobject tojs() {     var jsobj = new jsobject(context['object']);     jsobj["getstr"] = this.getstr;     return jsobj;   } }  void main() {     jsobject jsinst = context['jsinst'];     print(jsinst);     testclass tmp = new testclass(jsinst.callmethod("getmyattr"));     tojsobject(tmp);     jsinst.callmethod("printdartobj", [tojsobject(tmp)]); } 

the js file :

function myjsclass() {     this.my_attr = "salut"; }  myjsclass.prototype.getmyattr = function() {     return this.my_attr; }  myjsclass.prototype.printdartobj = function(obj) {     console.log(obj.tostring());     console.log(obj.getstr()); }  var jsinst = new myjsclass(); console.log(jsinst); 

the output :

[object object]

[myclass instance str: "salut"]

salut