You could use Guice’s Types class to generate the parameterized type:
https://google.github.io/guice/api-docs/latest/javadoc/com/google/inject/util/Types.html#newParameterizedType-java.lang.reflect.Type-java.lang.reflect.Type…-
(https://google.github.io/guice/api-docs/latest/javadoc/com/google/inject/util/Types.html#newParameterizedType-java.lang.reflect.Type-java.lang.reflect.Type...-)
For example:
Types.newParameterizedType( MongoCollection.class, MyDocument.class );
On Sunday, 13 September 2015 at 23:19, Tim Boudreau wrote:
> I'm working on Guice bindings for MongoDB's new async driver. The goal is to
> be able to call, e.g.
>
> mongoModule.bindCollection("myCollection", MyDocument.class)
>
> and then be able to inject
> @Named("myCollection") MongoCollection<MyDocument>
>
> I have this working just fine, but I'm actually implementing the JDK's
> ParameterizedType to do it (code below).
>
> Any reason this is a bad way to go about it, or that this approach might
> explode on some future version of Guice? It appears to work fine - things
> are injected as they should be - but implementing ParameterizedType is a
> little out-there.
>
> I did this for the older MongoDB driver by forcing the caller to pass a
> TypeLiteral, which is a bit ugly since they're also passing the type
> parameter as a Class object. So this results in a nicer API.
>
> Thanks,
>
> Tim
>
>
> MongoTypedCollectionProvider<T> typedProvider = new
> MongoTypedCollectionProvider<T>(dbProvider, collection, type, knownProvider,
> opts, inits);
> Type t = new FakeType<>(type);
> Key<MongoCollection<T>> key = (Key<MongoCollection<T>>)
> Key.get(t, Names.named(bindingName));
> binder.bind(key).toProvider(typedProvider);
>
>
>
> static class FakeType<T> implements ParameterizedType {
>
> private final Class<T> genericType;
>
> public FakeType(Class<T> genericType) {
> this.genericType = genericType;
> }
>
> @Override
> public String getTypeName() {
> return MongoCollection.class.getName();
> }
>
> @Override
> public Type[] getActualTypeArguments() {
> return new Type[]{genericType};
> }
>
> @Override
> public Type getRawType() {
> return MongoCollection.class;
> }
>
> @Override
> public Type getOwnerType() {
> return null;
> }
> }
>
>
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