Hi, I know, this is too late, but I want to share my suggestion: public <T extends AccessibleObject&AnnotatedElement> T reflectAs(Class<? super T> expected, MethodHandles.Lookup lookup)
Member mr = reflectAs(Member.class, MethodHandles.lookup()); AnnotatedElement ae = reflectAs(AnnotatedElement.class, MethodHandles.lookup()); AnnotatedElement am = reflectAs(Member.class, MethodHandles.lookup()); Field fd= reflectAs(Field.class, MethodHandles.lookup()); Constructor cr = reflectAs(Constructor.class, MethodHandles.lookup()); Method md = reflectAs(Method.class, MethodHandles.lookup()); Field fm= reflectAs(Member.class, MethodHandles.lookup()); Constructor cm = reflectAs(Member.class, MethodHandles.lookup()); Method mm = reflectAs(Member.class, MethodHandles.lookup()); Field fa= reflectAs(AnnotatedElement.class, MethodHandles.lookup()); Constructor ca = reflectAs(AnnotatedElement.class, MethodHandles.lookup()); Method ma = reflectAs(AnnotatedElement.class, MethodHandles.lookup()); Member mf= reflectAs(Field.class, MethodHandles.lookup()); Member mc = reflectAs(Constructor.class, MethodHandles.lookup()); Member mrm = reflectAs(Method.class, MethodHandles.lookup()); AnnotatedElement af= reflectAs(Field.class, MethodHandles.lookup()); AnnotatedElement ac = reflectAs(Constructor.class, MethodHandles.lookup()); AnnotatedElement aem = reflectAs(Method.class, MethodHandles.lookup()); Method mdc = reflectAs(Constructor.class, MethodHandles.lookup());//fails Constructor crm = reflectAs(Method.class, MethodHandles.lookup());//fails Constructor cf = reflectAs(Field.class, MethodHandles.lookup());//fails Field fc = reflectAs(Constructor.class, MethodHandles.lookup());//fails AnnotatedElement as = reflectAs(String.class, MethodHandles.lookup());//fails String ss = reflectAs(String.class, MethodHandles.lookup());//fails String sm = reflectAs(Method.class, MethodHandles.lookup());//fails Regards, Ali Ebrahimi On Mon, Nov 11, 2013 at 1:59 AM, Remi Forax <fo...@univ-mlv.fr> wrote: > The is a stupid issue with the signature of MethodHandleInfo.reflectAs, > j.l.r.Field, Method or Constructor implement two interfaces Member and > AnnotatedElement, with the current signature, the code > info.reflectAs(Member.class, lookup) > works but the code > info.reflectAs(AnnotatedElement.class, lookup) > doesn't work. > > Because there is no way to do an 'or' between several bounds of > a type variable, I think that the signature of reflectAs should be > changed from : > public <T extends Member> T reflectAs(Class<T> expected, Lookup lookup); > to > public <T> T reflectAs(Class<T> expected, Lookup lookup); > > and the javadoc should be modified to explain that a Member or > AnnotatedElement are > valid bounds of T. > > As a side effect, the signature of MethodHandles.reflectAs(Class<T>, > MethodHandle) > should be updated accordingly. > > There is a workaround, one can write: > (AnnotatedElement)info.reflectAs(Member.class, lookup) > but it's at best weird. > > cheers, > Rémi > > _______________________________________________ > mlvm-dev mailing list > mlvm-dev@openjdk.java.net > http://mail.openjdk.java.net/mailman/listinfo/mlvm-dev >
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