Dart - Get result from a method invoked using reflection-CodePudding

I'm trying to use dart's mirror API to dynamically invoke a function.

How can I obtain the result that's returned from the doWork method when invoking it via an InstanceMirror

class MyData {
  String someString;
}

class MyService {
  Future<MyData> doWork() async {
    print('doing work');
    return await Future(() => MyData()..someString = 'my result');
  }
}
void main() async {
  var instance = MyService();
  var mirrror = reflect(instance);
  var result = mirrror.invoke(#doWork, []);
}

I can see that "doing work" gets printed to the console so I know it's being invoked, but I'm struggling to interpret the result from the invoke function.

CodePudding user response：

The value are inside the InstanceMirror in the property reflectee. So something like this:

import 'dart:mirrors';

class MyData {
  String? someString;
}

class MyService {
  Future<MyData> doWork() async {
    print('doing work');
    return await Future(() => MyData()..someString = 'my result');
  }
}
void main() async {
  var instance = MyService();
  var mirrror = reflect(instance);
  var result = mirrror.invoke(#doWork, <dynamic>[]);
  var resultValue = await (result.reflectee as Future<MyData>);
  print(resultValue.someString); // my result
}