Dart reflection using the 'dart:mirrors' package

readme.md

Dart Reflection using Dart Mirrors

For background on Reflection with Mirrors in Dart see:

Reflection in Dart with Mirrors: An Introduction - Gilad Bracha (November 2012 (updated November 2013))

Originally created on https://dartpad.dartlang.org as https://dartpad.dartlang.org/53dae7eab07f4fad158e8fed3d62c1d5

Contains no errors and warnings. This code has no associated html or css. It imports the 'dart:mirrors' packages as well.

Find this at dartpad.dartlang.org/?source=c69e51e8-874a-4cda-84c9-a43d0e661cdf.

Created with <3 with dartpad.dartlang.org.

Example output:

HTML OUTPUT CONSOLE

>> [ .SelfPrinting ] - - - - -
>> + Declarations - - - - -
dummyFunc11
dummyFunc12
dummyFunc13
SelfPrinting
>> + Members - - - - -
==
hashCode
toString
noSuchMethod
runtimeType
dummyFunc01
dummyFunc02
dummyFunc11
dummyFunc12
dummyFunc13
>> + Constructor - - - - -
SelfPrinting
>> + Parameters - - - - -
int: arg1

dart_reflection.dart

import 'dart:mirrors' show 
  MirrorSystem, ClassMirror, ParameterMirror, DeclarationMirror, MethodMirror, reflectClass;

class SuperClass { 
  SuperClass(){ /* pass */ }
  dummyFunc01(){ /* pass */ } 
  dummyFunc02(){ /* pass */ } 
} 
  
class SelfPrinting 
  extends SuperClass { 
  SelfPrinting(int arg1){ /* pass */ }
  dummyFunc11(){ /* pass */ } 
  dummyFunc12(){ /* pass */ } 
  dummyFunc13(int i){ /* with arg(s): pass */ }
} 
  
main() { 
  ClassMirror classMirror = reflectClass(SelfPrinting); 
  print(">> [ ${MirrorSystem.getName(classMirror.qualifiedName)} ] - - - - -");
 	print(">> + Declarations - - - - -");
  classMirror.declarations.forEach((symbol, declarationMirror) {
    print(MirrorSystem.getName(symbol));
  });  
  print(">> + Members - - - - -");
  classMirror.instanceMembers.forEach((symbol, methodMirror) {
    print(MirrorSystem.getName(symbol));
  });  
	// find contructors in declarations map
  List<DeclarationMirror> constructors = new List.from(
    classMirror.declarations.values.where((declare) {
      return declare is MethodMirror && declare.isConstructor;
    })
  );  
  // cast DeclarationMirror into MethodMirror and use getter MethodMirror.parameters 
  // to get all parameters of the constructor.
  constructors.forEach((constructor) {
    if (constructor is MethodMirror) {
      print(">> + Constructor - - - - -");
      String name = MirrorSystem.getName(constructor.simpleName);
      print("$name");      
      List<ParameterMirror> parameters = constructor.parameters;
      print(">> + Parameters - - - - -");
      parameters.forEach((parameter) {
        String type = MirrorSystem.getName(parameter.type.simpleName);
        String name = MirrorSystem.getName(parameter.simpleName);
        print("$type: $name");        
      });
    }
  });  
}