Thank you, Thomas.  That worked well and immediately.

On Monday, September 19, 2016 at 9:29:50 AM UTC-4, Thomas Broyer wrote:
>
> You need to require the Map<String,String>, not the raw Map class.
>
>  requireBinding(Key.get(new TypeLiteral<Map<String,String>>(){}, MyMap))
>
> On Monday, September 19, 2016 at 3:25:03 PM UTC+2, Steve Storck wrote:
>>
>> Some of my modules require a binding from another module.  I want to set 
>> up a requireBinding in the dependent modules' configure() method, but it 
>> doesn't seem to be working for me.  Here is an example of what I am doing:
>>
>> @BindingAnnotation
>> @Target([FIELD, PARAMETER, METHOD])
>> @Retention(RUNTIME)
>> @interface MyMap {
>> }
>>
>> class ModuleA extends AbstractModule {
>>     protected void configure() {
>>     }
>>
>>     @Provides
>>     @Singleton
>>     @MyMap
>>     static def Map<String, String> myMap() {
>>         ImmutableMap.copyOf(
>>                 [A: 'val1',
>>                  B: 'val2']
>>         )
>>     }
>> }
>>
>> class ModuleB extends AbstractModule {
>>     protected void configure() {
>>         requireBinding(Key.get(Map, MyMap))
>>         bind Foo
>>     }
>> }
>>
>> class ModuleIT extends Specification {
>>     def 'Test module configuration'() {
>>         setup:
>>         def injector = Guice.createInjector new ModuleA(), new ModuleB()
>>
>>         when:
>>         def result = injector.getInstance Foo
>>
>>         then:
>>         result instanceof Foo
>>         result.someMap instanceof Map<String, String>
>>     }
>> }
>>
>> This results in an error when createInjector is called:
>> com.google.inject.CreationException: Unable to create injector, see the 
>> following errors:
>> 1) No implementation for java.util.Map annotated with interface 
>> a.b.c.MyMap was bound.
>>
>> On the other hand, it works fine if I don't specify requreBinding.  
>> However, since this dependent module has no notion of the map that is 
>> bound, I want to ensure that the binding is present when the dependent 
>> module is created.
>>
>

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