Hi all,
since I am experimenting a bit with MethodHandles and invokedynamic
these days on java7b125 I stumbled on some things...
(1) How does the signature of the bootstrap method has too look like?
So far I found (Class,String,MethodType):CallSite and
(Lookup,String,MethodType):CallSite, that both work. But what I could
not get working was a version that takes an Object[] for the presented
arguments. Simply attaching an Object[] or Object... taking parameter in
the signature above did not work. When looking at Remi's named argument
example in
http://weblogs.java.net/blog/forax/archive/2011/01/21/jsr-292-goodness-named-parameters
then I see a bootstrap method that is not usable for me in java7b125.
(2) Since Linkage#registerBootstrapMethod should not be used anymore I
am currently not fully sure as of how to replace it. The documentation
says something but an annotation, which I cannot use, since I generate
the class myself... it talks about marking the method... ok.. but how
actually? From a users perspective I find there a lot of information
that does help me. A simple example would be so much better. Is anyone
able to give me one that then works for b125?
(3) MH#invokeExact as well as MH#invokeGeneric do cause trouble to me in
java7b125. Maybe it is because the program that uses the handles is the
eclipse compiler, but I was not aware that for these we have compiler
magic on work. Anyway, what I get is the handle complaining about the
Object[] produced to store the arguments of the invokeExact and
invokeGeneric. The only version I could get to work in that setup is
MH#withArguments. is that supposed to be like this?
Thanks for the help
bye Jochen
--
Jochen "blackdrag" Theodorou
The Groovy Project Tech Lead
http://blackdragsview.blogspot.com/
For Groovy programming sources visit http://groovy.codehaus.org
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