How to create values for map in dagger

Question

In my nano project, I decided to replace big nasty switch statement with map of commands. Now I'm in the process of tiding up my code and i want to create provider which provides me populated map.

I wonder, what will be best practice for that. Initially i was thinking about something like this:

@Provides 
ActionResolver provideActionResolver(Dependency dep1,Dependency dep2) {
  Map<SomeEnum,Action> map = new HashMap<>();
  map.put(SomeEnum.A1,new Action1(dep1);
  map.put(SomeEnum.A2,new Action2(dep2);
  return new ActionResolver(map);
}

I wonder is it right way to go, and what is the best practice for this.

Answer 1

With Map Multibindings, if I'm correct, you could do the following:

@MapKey
@interface SomeEnumKey {
    SomeEnum value();
}

@Provides 
@IntoMap
@SomeEnumKey(SomeEnum.A1)
Action action1(@Named("dep1") Dependency dep1) {
    return new Action1(dep1);
}

@Provides 
@IntoMap
@SomeEnumKey(SomeEnum.A2)
Action action2(@Named("dep2") Dependency dep2) {
    return new Action2(dep2);
}

@Provides 
ActionResolver provideActionResolver(Map<SomeEnum, Action> actions) {
    return new ActionResolver(actions);
}