#259: JAVA:JSTATIC cannot always be invoked properly --------------------------------------------+------------------------------- Reporter: https://openid.fau.de/eg74yneg | Owner: mevenson Type: defect | Status: accepted Priority: major | Milestone: 1.1.0 Component: abcl-contrib | Version: 1.1.0-dev Keywords: | --------------------------------------------+-------------------------------
Old description:
CL-USER> * #<jarray [B@5719d1 {15F987F}> CL-USER> (jss:jarray-to-list *)
==========
no such method [Condition of type ERROR]
Restarts: 0: [RETRY] Retry SLIME REPL evaluation request. 1: [ABORT] Return to sldb level 1. 2: [RETRY] Retry SLIME REPL evaluation request. 3: [*ABORT] Return to SLIME's top level. 4: [ABORT] Abort thread.
Backtrace: 0: (#<FUNCTION {149EEF3}> #<ERROR {E6942E}> #<FUNCTION {149EEF3}>) 1: (APPLY #<FUNCTION {149EEF3}> (#<ERROR {E6942E}> #<FUNCTION {149EEF3}>)) 2: (SYSTEM::RUN-HOOK SYSTEM::*INVOKE-DEBUGGER-HOOK* #<ERROR {E6942E}> #<FUNCTION {149EEF3}>) 3: (INVOKE-DEBUGGER #<ERROR {E6942E}>) 4: org.armedbear.lisp.Lisp.error(Lisp.java:382) 5: org.armedbear.lisp.Java.jstatic(Java.java:462) 6: org.armedbear.lisp.Java$pf_jstatic.execute(Java.java:512) 7: org.armedbear.lisp.Primitive.execute(Primitive.java:135) 8: (JSS:JARRAY-TO-LIST #<jarray [B@5719d1 {15F987F}>) 9: (SYSTEM::%EVAL (JSS:JARRAY-TO-LIST *)) 10: (EVAL (JSS:JARRAY-TO-LIST *)) 11: (SWANK::EVAL-REGION "(jss:jarray-to-list *) ")
New description:
The following doesn't work
{{{ (jstatic "asList" "java.util.Arrays" (java:jnew-array (jclass "int") 1)) }}}
The question is: should it?
CL-USER> * #<jarray [B@5719d1 {15F987F}> CL-USER> (jss:jarray-to-list *)
==========
no such method [Condition of type ERROR]
Restarts: 0: [RETRY] Retry SLIME REPL evaluation request. 1: [ABORT] Return to sldb level 1. 2: [RETRY] Retry SLIME REPL evaluation request. 3: [*ABORT] Return to SLIME's top level. 4: [ABORT] Abort thread.
Backtrace: 0: (#<FUNCTION {149EEF3}> #<ERROR {E6942E}> #<FUNCTION {149EEF3}>) 1: (APPLY #<FUNCTION {149EEF3}> (#<ERROR {E6942E}> #<FUNCTION {149EEF3}>)) 2: (SYSTEM::RUN-HOOK SYSTEM::*INVOKE-DEBUGGER-HOOK* #<ERROR {E6942E}> #<FUNCTION {149EEF3}>) 3: (INVOKE-DEBUGGER #<ERROR {E6942E}>) 4: org.armedbear.lisp.Lisp.error(Lisp.java:382) 5: org.armedbear.lisp.Java.jstatic(Java.java:462) 6: org.armedbear.lisp.Java$pf_jstatic.execute(Java.java:512) 7: org.armedbear.lisp.Primitive.execute(Primitive.java:135) 8: (JSS:JARRAY-TO-LIST #<jarray [B@5719d1 {15F987F}>) 9: (SYSTEM::%EVAL (JSS:JARRAY-TO-LIST *)) 10: (EVAL (JSS:JARRAY-TO-LIST *)) 11: (SWANK::EVAL-REGION "(jss:jarray-to-list *) ")
--
Comment(by mevenson):
Things seem rather complicated with Java the language generics.
A method that takes an Object[] as an argument {{{ public static void objectArgs(Object[] args) }}}
cannot be invoked on an array of primitive types
{{{ int i[] = {42}; objectArgs(i); // Doesn't compile }}}
But the signature of the method originally in question declares the type of array to extend java.lang.Object:
{{{ public static <T extends Object> List<T> asList(T[] ts) }}}
and *can* be invoked on an array of primitive types
{{{ int i[] = {42}; java.util.Arrays.asList(i); }}}
Need to check exactly what kind of code is generated by javac here, but presumably the compiler somehow transforms the primitive array to wrapped type here?
So, JAVA:JSTATIC cannot make currently make a call that can be made in Java the language. Presumably JAVA:JCALL has the same sort of problem
From experimenting a bit, it would not be enough to fix Java.isApplicableMethod(). We would also at least have to extend Java.javaInstance(Class<?>) to return arrays of primitive types.