Guice And Scala - Injection on Generics Dependencies

You need a TypeLiteral binding like this:

bind(new TypeLiteral[Repository[Domain]] {})
 .annotatedWith(classOf[DomainDependency])
 .to(classOf[DomainRepository])
 .in(Scopes.SINGLETON)

TypeLiteral is a special class that allows you to specify a full parameterized type. Basically, you can't instantiate a class with a generic type parameter.

Also, take a look at this answer.

See "How to inject class with generic type?" in the Guice FAQ.

As David says, you need a TypeLiteral to bind a generic type (remember - generic types are erased to just the class, without the type parameter at run-time).

Another alternative is to something like my Scala Guice library to build the TypeLiterals needed by Guice from Scala's Manifests. If you mix in the ScalaModule trait, you would then be able to do something like:

bind[Repository[Domain]]
 .annotatedWith[DomainDependency]
 .to[DomainRepository]
 .in(Scopes.SINGLETON)