You need to have as few or as many modules as needed to declare all items that
are depended-upon, or asked-for from the injector
The exception is if you are using just-in-time binding and haven't forbidden
no-arg constructors, and in that case, any object with an explicit or implicit
no-arg constructor could be instantiated by the injector to satisfy a
dependency.
But other than the above, yes, you must have BarDep bound in some module
somewhere that is passed to createInjector() or install()ed in another module.
Christian.
On Jul 5, 2012, at 12:06 PM, google-gu...@googlecode.com wrote:
> Comment by zxy1256:
>
> I have a related question: When create an injector to create Foo, do we need
> a BarDepModule, which is a module for Bar's dependency?
>
> {{{
> public class Foo {
> private Bar bar;
>
> @Inject
> public Foo(Bar bar) {
> this.bar = bar;
> }
>
> public static void main(String[] argv) {
> Injector injector = Guice.getInjector(new BarModule());
> Foo foo = injector.getInstance(Foo.class);
> }
> }
> //=====================
> public interface Bar {}
>
> public class BarImp {
> private BarDep barDep; // Dependency of Bar
>
> @Inject
> public Bar(BarDep barDep) {
> this.barDep = barDep;
> }
> }
> //=====================
>
> }}}
>
> For more information:
> http://code.google.com/p/google-guice/wiki/InjectOnlyDirectDependencies
>
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