Enum from String

Question

I have an Enum and a function to create it from a String because i couldn't find a built in way to do it

enum Visibility{VISIBLE,COLLAPSED,HIDDEN}  Visibility visibilityFromString(String value){   return Visibility.values.firstWhere((e)=>       e.toString().split('.')[1].toUpperCase()==value.toUpperCase()); }  //used as Visibility x = visibilityFromString('COLLAPSED'); 

but it seems like i have to rewrite this function for every Enum i have, is there a way to write the same function where it takes the Enum type as parameter? i tried to but i figured out that i can't cast to Enum.

//is something with the following signiture actually possible?      dynamic enumFromString(Type enumType,String value){       } 

Answer 1

Mirrors aren't always available, but fortunately you don't need them. This is reasonably compact and should do what you want.

enum Fruit { apple, banana }  // Convert to string String str = Fruit.banana.toString();  // Convert to enum Fruit f = Fruit.values.firstWhere((e) => e.toString() == str);  assert(f == Fruit.banana);  // it worked 

Fix: As mentioned by @frostymarvelous in the comments section, this is correct implementation:

Fruit f = Fruit.values.firstWhere((e) => e.toString() == 'Fruit.' + str);