Re: [Jscheme-user] errors in jscheme with java-1.5-beta

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On Apr 26, 2004, at 1:47 PM, Ken Anderson wrote:

> This looks like quasi quote is ultimately invoking  (.append  
> stringBuffer ...)
> and we try to invoke a method on java.lang.AbstractStringBuffer .
>
> Can you do a simple test, like:
>
> (define x 4)
> {x + 3 = [(x + 3)]}
>
> This should cause the problem.  This might be a method lookup problem.
I just downloaded java 1.5 and I also found the problem is in .append:

 > (define z (java.lang.StringBuffer.))
 > (.append z "abc")
   .... this gives a "Bad method application from a private class" error

You can get arround this temporarily using the "hack"

    (set! .append .append#)

But we may need to do some deeper work to incorporate the
new "generic" type system with the Jscheme javadot notation.
Make this leap will probably solve these invocation errors
but will require an extension of javadot to generic types....

---Tim---

>
> There is another problem with the class Object[] too...
>
> k
> At 02:08 PM 4/20/2004 -0400, Timothy John Hickey wrote:
>> Hi David,
>>
>> Does this only happen when you load in the elf/classpath.scm
>> or does it happen more generally (e.g. for any javadot call,
>> for any private javadot call, etc....) I haven't downloaded the
>> preview version of Java on any of my machines yet, but I'll try
>> to download a version over the weekend and look into the problem....
>>
>> Thanks for the bug report,
>> Sorry I have to wait a few days before tackling it.....
>>
>> ----Tim---
>> On Apr 19, 2004, at 1:01 PM, david wrote:
>>
>>>
>>> I am getting errors  modifying the classpath
>>> in the new java from sun. This works fin with
>>> the 1.4 jvm
>>> --------------------------------------------------------------------- 
>>> -
>>> newport:~$
>>> newport:~$ java -jar /usr/share/davud/jscheme.jar
>>>
>>> JScheme 6.3 4/5/04 http://jscheme.sourceforge.net
>>>
>>>> (load "elf/classpath.scm")
>>> (map (lambda (u) (addClasspathUrl u))
>>>     '("/opt/postgresql-7.4/share/java/postgresql.jar"
>>>       "/mnt/hda3/download/napkinlaf.jar"
>>>       "/mnt/hda3/download/CLooks_120.jar"))
>>>
>>>
>>> #t
>>>> (#null #null #null)
>>>
>>>
>>> ----------------------------------------------------------
>>>
>>>> newport:~$ /mnt/hda1/j2sdk1.5.0/bin/java -jar  
>>>> /usr/share/davud/jscheme.jar
>>>
>>> JScheme 6.3 4/5/04 http://jscheme.sourceforge.net
>>>
>>>> (load "elf/classpath.scm")
>>> (map (lambda (u) (addClasspathUrl u))
>>>     '("/opt/postgresql-7.4/share/java/postgresql.jar"
>>>       "/mnt/hda3/download/napkinlaf.jar"
>>>       "/mnt/hda3/download/CLooks_120.jar"))
>>> ** WARNING: Error during load (lineno 10): jsint.BacktraceException[
>>>
>>> (.append sb (U.stringify (car args )#f ))
>>>  args = ("\nThe class loader used by Jscheme can be accessed  
>>> with\n(Import.getClassLoader) and (Import.setCl...
>>>  sb =
>>>  loop = (lambda !{}~1 (args sb)...)
>>>  args= = ("\nThe class loader used by Jscheme can be accessed  
>>> with\n(Import.getClassLoader) and (Import.setCl...
>>>  sb= =
>>>  args = ("\nThe class loader used by Jscheme can be accessed  
>>> with\n(Import.getClassLoader) and (Import.setCl...
>>>
>>>  ====================================
>>> SchemeException: Bad method application from a private class: ,  
>>> "(java.lang.IllegalAccessException: Class jsint.Invoke can not  
>>> access a member of class java.lang.AbstractStringBuilder with  
>>> modifiers \"public\" public java.lang.AbstractStringBuilder  
>>> java.lang.AbstractStringBuilder.append(java.lang.String) #(\nThe  
>>> class loader used by Jscheme can be accessed  
>>> with\n(Import.getClassLoader) and  
>>> (Import.setClassLoader).\n\n(replaceClassLoaders) creates a new  
>>> class loader and resets Jscheme's\nint...
>>>
>>> (.append sb (U.stringify (car args )#f ))
>>>  args = ("\nThe class loader used by Jscheme can be accessed  
>>> with\n(Import.getClassLoader) and (Import.setCl...
>>>  sb =
>>>  loop = (lambda !{}~1 (args sb)...)
>>>  args= = ("\nThe class loader used by Jscheme can be accessed  
>>> with\n(Import.getClassLoader) and (Import.setCl...
>>>  sb= =
>>>  args = ("\nThe class loader used by Jscheme can be accessed  
>>> with\n(Import.getClassLoader) and (Import.setCl...
>>>
>>>  ====================================
>>> SchemeException: Bad method application from a private class: ,  
>>> "(java.lang.IllegalAccessException: Class jsint.Invoke can not  
>>> access a member of class java.lang.AbstractStringBuilder with  
>>> modifiers \"public\" public java.lang.AbstractStringBuilder  
>>> java.lang.AbstractStringBuilder.append(java.lang.String) #(\nThe  
>>> class loader used by Jscheme can be accessed  
>>> with\n(Import.getClassLoader) and  
>>> (Import.setClassLoader).\n\n(replaceClassLoaders) creates a new  
>>> class loader and resets Jscheme's\ninternal caches, so that classes  
>>> can be recompiled and tested easily.\n))"
>>> ** WARNING: Can't define-method (iterate (items Object[]) action)  
>>> classes (Object[]) do not exist.
>>> #t
>>>> (#null #null #null)
>>>
>>>
>>>
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>>
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