Examples of org.jboss.weld.util.reflection.EventObjectTypeResolverBuilder

org.jboss.weld.util.reflection.EventObjectTypeResolverBuilder

Builds a special {@link TypeResolver} capable of resolving type variables by using a combination of two type hierarchies.The special resolver is only necessary for situations where the type of the event object contains an unresolved type variable which cannot be resolved using the selected event type because the selected event type is a subtype of the event object. For example: private Event> event; event.fire(new ArrayList()); The event object type is {@link ArrayList} (raw type due to type erasure) The selected type is ListWe cannot simply infer the correct type (ArrayList) from the runtime type nor from the selected type. What this special resolver does is that it combines the following type variable assignments: L -> E L -> String and resolves E to String. The resolver is capable of doing it recursively for parameterized types. @author Jozef Hartinger

public class EventTypeResolutionTest {


    public static Type resolveType(Type selectedType, Class<?> eventObjectType) {
        HierarchyDiscovery selectedTypeHierarchy = new HierarchyDiscovery(selectedType);
        HierarchyDiscovery eventTypeHierarchy = HierarchyDiscovery.forNormalizedType(eventObjectType);
        TypeResolver resolver = new EventObjectTypeResolverBuilder(selectedTypeHierarchy.getResolver()
                .getResolvedTypeVariables(), eventTypeHierarchy.getResolver().getResolvedTypeVariables()).build();
        return resolver.resolveType(Types.getCanonicalType(eventObjectType));
    }

            /*
             * Examining the hierarchy of the specified type did not help. This may still be one of the cases when combining the
             * event type and the specified type reveals the actual values for type variables. Let's try that.
             */
            Type canonicalEventType = Types.getCanonicalType(event.getClass());
            TypeResolver objectTypeResolver = new EventObjectTypeResolverBuilder(injectionPointTypeHierarchy.getResolver()
                    .getResolvedTypeVariables(), new HierarchyDiscovery(canonicalEventType).getResolver()
                    .getResolvedTypeVariables()).build();
            resolvedType = objectTypeResolver.resolveType(canonicalEventType);
        }
        return resolvedType;

Examples of org.jboss.weld.util.reflection.EventObjectTypeResolverBuilder

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