[armedbear-devel] Seamless ABCL / Java integration proposal

[Alan Ruttenberg]

It was 229 I was referring to. I see it is marked as fixed (yeah!).
Sorry for the red herring.
Thanks, Mark!
-Alan

On Sun, Feb 17, 2013 at 12:08 PM, Mark Evenson <evenson at panix.com> wrote:
> On 2/17/13 1:53 AM, Alan Ruttenberg wrote:
>
>>[…] Also I think there's one remaining bug with
>> method look up that we've reported that I don't think is addressed yet.
>
> […]
>
> I think you are referring to [#259][] for which the status is that your
> original form
>
>     (jss:jarray-to-list (java:jnew-array (jclass "int") 40))
>
> has been working for some time.
>
> [#259]: http://trac.common-lisp.net/armedbear/ticket/259
>
> The equivalent form not utilizing JSS, namely
>
>     (jstatic "asList" "java.util.Arrays" (java:jnew-array (jclass "int") 1))
>
> still fails.  The problems stem from how Java-the-language erases
> parametrized type information at runtime, and how the JAVA package
> currently tries to match arguments and how it coerces arrays of
> primitives (it currently doesn't implicitly).
>
> As a workaround, don't use arrays of primitive types, instead using the
> "boxed" Java type:
>
>     (jstatic "asList" "java.util.Arrays" (java:jnew-array (jclass
> "java.lang.Integer") 1))
>
> There should be negligible speed differentials on contemporary JVM
> implementations from what I understand, and if you were that worried
> about memory, you wouldn't be using Java in the first place, now would you?
>
> --
>
> "A screaming comes across the sky.  It has happened before, but there is
> nothing to compare it to now."
>
>