Benefits from using @Exact

[brandizzi]

Hello, all.

What is the purpose of using the @Exact annotation like below (MyBean being an interface and SpecifcMyBean one implementation of it):

public class ToBeInjected {
    @Inject @Exact(SpecificMyBean.class)
    private MyBean myBean;
}

instead of using the type to define the bean?

public class ToBeInjected {
    @Inject
    private SpecificMyBean myBean;
}

[agori]

The same benefic explained here

Image to inject an object declared as ArrayList instead of List. Then, if you need to change the implementation, you probably have to refactor much of your code. Thanks to @Exact you only need to change the attribute in the annotation.

[brandizzi]

I see the point and it makes sense. Thank you for your answer!