How to inject with Guice when there are two different constructors?
dependency-injection, guice
Solution
You can only inject into the one ctor.
Depending on how this class is being used, you could:
- Inject a factory into the client code with two "new" methods.
- Roll all the arguments into one ctor and pass null when not required.
How can a calling class create the one or the other instance?
This suggests that the calling classes will want multiple instances of MyDialog? Then you need to use a hand-rolled factory (Assisted Inject can handle this for you if you only had one ctor). I don't know the details of what you are up to and I'm likely repeating what you already know but as a blanked statement I'd suggest also extracting an interface from MyDialog and have the factory return them. This way you can fake MyDialog in tests.
Problem
Total Guice noob here, have read a few articles and seen the intro video, that's about it. Here's my simplified old code that I'm trying to "guicifiy". Can't quite figure out how to, since (as far as I understand), I can only `@inject`-annotate one of the two constructors? How can a calling class create the one or the other instance? Or will I have to refactor this somehow? ``` public class MyDialog extends JDialog { public MyDialog( JFrame parent, <other parameters...> ) { super( parent ); } public MyDialog( JDialog parent, <other parameters...>) { super( parent ); } } ```