[seam-issues] [JBoss JIRA] Updated: (SOLDER-23) Provide utility to extract type parameter from Instance

Provide utility to extract type parameter from Instance ------------------------------------------------------- Key: SOLDER-23 URL: https://issues.jboss.org/browse/SOLDER-23 Project: Seam Solder Issue Type: Feature Request Components: Reflections Affects Versions: 3.0.0.Beta1 Reporter: Dan Allen Assignee: Dan Allen Priority: Minor Fix For: 3.0.0.Beta3 When discovering injection points, a type of Instance<T> is effectively the same as discovering a type T. You don't want to create a producer method for an Instance, for instance, hence why you want to figure out what T is. Thus, it's common to want to extract the type parameter from Instance. Having a utility would be convenient. Here's an example that collects the actual bean types (extracting from the Instance type parameter if necessary) Set<Type> types = new HashSet<Type>(); for (InjectionPoint ip : event.getInjectionTarget().getInjectionPoints()) { types.add(Reflections.getActualType(ip.Type())); } Here's the utility: private static Type getActualType(Type t) { if (t instanceof ParameterizedType && ((ParameterizedType) t).getRawType().equals(Instance.class)) { return ((ParameterizedType) t).getActualTypeArguments()[0]; } return t; }