나는 세 다트에서 수업을 다트

Question

의 모든 서브 클래스를 찾기?

편집 :

감사 알렉산드르 Ardhuin이 솔루션은 완벽하게 작동!

import 'dart:mirrors'; 

class A {} 
class B extends A{} 
class C extends A{} 
class D {} 
class E extends C {} 

bool isParent(String parent,ClassMirror clazz){ 
    var objectParentName = MirrorSystem.getName(clazz.superclass.simpleName); 
    if (objectParentName == "Object"){ 
    return parent == "Object"; 
    } 
    var result = parent == objectParentName; 
    if (!result){ 
    return isParent(parent,clazz.superclass); 
    } 
    return result; 
} 

List<String> findAllSubclasses(String clazz){ 
    var result = []; 
    final ms = currentMirrorSystem(); 
    ms.isolate.rootLibrary.classes.forEach((s,c) { 
    if (isParent(clazz,c)){ 
     result.add(MirrorSystem.getName(c.simpleName)); 
    } 
    }); 
    return result; 
} 


main(){ 
    var result = findAllSubclasses('A'); 
    print(result); 
} 

Answer 1

Mirror library 몇 가지 정보를 정기적으로 제공 할 수 있습니다 :

내가 내가 코드를 편집 한 다트 을 학습하고, 재귀 솔루션을 넣고있어, 살펴

import 'dart:mirrors'; 

class A {} 
class B extends A{} 
class C extends A{} 
class D {} 

main(){ 
    final ms = currentMirrorSystem(); 
    ms.isolate.rootLibrary.classes.forEach((s,c) { 
    final parentClassName = MirrorSystem.getName(c.superclass.simpleName); 
    if (parentClassName == 'A') { 
     final className = MirrorSystem.getName(c.simpleName); 
     print('$className has A as super class'); 
    } 
    }); 
} 

출력 될 것입니다 :

C has A as super class 
B has A as super class 

Answer 2

import 'dart:io'; 
import 'package:reflection/reflection.dart'; 

void main() { 
    var type = FileSystemEntity; 
    var result = findAllSubclasses(typeInfo(type)); 
    var text = result.join("\r"); 
    print("=============================="); 
    print("Subclasses of '${type}'"); 
    print(text); 
} 

List<String> findAllSubclasses(TypeInfo type) { 
    var typeOrig = type.originalDeclaration; 
    var childs = MirrorSystemInfo.current.isolate.libraries.values 
    .select((library) => library.getClasses(BindingFlags.PRIVATE | BindingFlags.PUBLIC).values) 
    .selectMany((clazz) => clazz) 
    .where((clazz) => clazz.isA(type) && clazz.originalDeclaration != typeOrig); 
    return childs.toList(); 
} 

============================== 
Subclasses of FileSystemEntity 
File 
_Link 
Directory 
_File 
_Directory 
Link