Question

I have a question regarding Guice. I have got an interface IMyInterface, the class MyClass implements it.

public class MyClass {
   public MyClass(IMyWorker);
}

The interface IMyWorker has two implementaters MyWorker1 and MyWorker2.

The binding I have got is:

    bind(IMyInterface.class).to(MyClass.class);
    bind(IMyWorker.class).annotatedWith(W1.class).to(MyWorker1.class);
    bind(IMyWorker.class).annotatedWith(W2.class).to(MyWorker2.class);

W1 and W2 are defined annotations.

My questions is that: When I create an instance of MyClass, how can I specify which Worker I want to inject into the constructor of MyClass?

Many thanks.

Answer 1

Add the annotation to the constructor of MyClass.

@Inject
public MyClass(@W1 IMyWorker worker) 
{
    ....
}

This way an instance of class MyWorker1 will be injected.