Be careful when exposing bindings without annotation!!!
Module1: expose(Outer.class) -> Outer.class is now "global" and not
"private"
Module2:
bind(Outer.class).annotatedWith(Names.named("2")).to(Outer.class)
-> the to(Outer.class) actually binds to the exposed binding from
module1!
Note: If you do bind(Outer.class) in Module2 you will get an error.
Cheers
Alen
On Oct 7, 8:00 pm, Christopher Berner <[email protected]>
wrote:
> I have a class A that depends on an implementation of class B, and I'm
> trying to create two private modules that expose a binding for class
> A, but with different bindings for the class B. However, even though I
> exposed one binding with annotation and one without, I'm still getting
> the same implementation of class B in both cases.
>
> I've included some code that demonstrates the problem, if anyone can
> point out what I'm doing wrong I would be very grateful!
>
> import org.junit.Assert;
>
> import com.google.inject.Guice;
> import com.google.inject.Inject;
> import com.google.inject.Injector;
> import com.google.inject.Key;
> import com.google.inject.PrivateModule;
> import com.google.inject.name.Names;
>
> public class Junk {
> public static void main(String[] args) {
> Injector injector = Guice.createInjector(new Module2(), new
> Module1());
>
> Outer outer2 = injector.getInstance(Key.get(Outer.class,
> Names.named("2")));
> Outer outer1 = injector.getInstance(Outer.class);
>
> Assert.assertTrue(outer1.inner instanceof Inner1);
> Assert.assertTrue("Expected Inner2, but got " +
> outer2.inner.getClass(), outer2.inner instanceof Inner2);
> }
>
> }
>
> interface Inner {}
> class Inner1 implements Inner {};
> class Inner2 implements Inner {};
>
> class Outer {
> Inner inner;
>
> @Inject
> Outer(Inner inner) {
> this.inner = inner;
> }
>
> }
>
> class Module1 extends PrivateModule {
> @Override
> protected void configure() {
> binder().requireExplicitBindings();
> bind(Outer.class);
> expose(Outer.class);
> bind(Inner.class).to(Inner1.class);
> }
>
> }
>
> class Module2 extends PrivateModule {
> @Override
> protected void configure() {
> binder().requireExplicitBindings();
>
> bind(Outer.class).annotatedWith(Names.named("2")).to(Outer.class);
> expose(Outer.class).annotatedWith(Names.named("2"));
> bind(Inner.class).to(Inner2.class);
> }
>
>
>
>
>
>
>
> }
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