See
public void testDecoratedTypes()

{ List<Decorator<?>> decorators = getCurrentManager().resolveDecorators(FooBar.TYPES); assert decorators.size() == 1; assert decorators.get(0).getDecoratedTypes().size() == 3; assert decorators.get(0).getDecoratedTypes().contains(Foo.class); assert decorators.get(0).getDecoratedTypes().contains(Bar.class); assert decorators.get(0).getDecoratedTypes().contains(Baz.class); assert !decorators.get(0).getDecoratedTypes().contains(Serializable.class); assert !decorators.get(0).getDecoratedTypes().contains(FooDecorator.class); assert !decorators.get(0).getDecoratedTypes().contains(AbstractFooDecorator.class); assert !decorators.get(0).getDecoratedTypes().contains(Boo.class); }

But Boo is a superinterface of FooDecorator (not a superclass). And according of JSR-299 8.1 it's a decorated type:

8.1. Decorator beans
A decorator is a managed bean. The set of decorated types of a decorator includes all bean types of the managed bean which are Java interfaces, except for java.io.Serializable.