Jython

Hi Michael,

Monday, April 26, 2004, 1:27:18 PM, you wrote:

CM>     Jython 2.1 on java1.3.1_11 (JIT: null)
CM>     Type "copyright", "credits" or "license" for more information.
CM>     >>> import java.lang.reflect.Modifier as Modifier
CM>     >>> Modifier.toString(2)  # should return 'private'
CM>     '2'
CM>     >>>

CM> I expected it to return 'private' but it returned '2' instead. I've
CM> got two questions:
CM>   (1) Why?

 A bug? :-)  I've no idea really!

CM>   (2) How do I fix it?

 While I don't like the practice of accessing static routines via
 instance variables, it does provide a work-around in this case!
 Continuing on from your code above:-

      >>> m = Modifier()
      >>> m
      java.lang.reflect.Modifier@...
      >>> m.toString(2)
      'private'
      >>>

-- 
Best regards,
 Gwyn

> Hi Michael,
> 
> Monday, April 26, 2004, 1:27:18 PM, you wrote:
> 
> CM>     Jython 2.1 on java1.3.1_11 (JIT: null)
> CM>     Type "copyright", "credits" or "license" for more information.
> CM>     >>> import java.lang.reflect.Modifier as Modifier
> CM>     >>> Modifier.toString(2)  # should return 'private'
> CM>     '2'
> CM>     >>>
> 
> CM> I expected it to return 'private' but it returned '2' instead. I've
> CM> got two questions:
> CM>   (1) Why?
> 
>  A bug? :-)  I've no idea really!
> 
> CM>   (2) How do I fix it?
> 
>  While I don't like the practice of accessing static routines via
>  instance variables, it does provide a work-around in this case!
>  Continuing on from your code above:-
> 
>       >>> m = Modifier()
>       >>> m
>       java.lang.reflect.Modifier@...
>       >>> m.toString(2)
>       'private'
>       >>>
> 
> -- 
> Best regards,
>  Gwyn
> 
> 

use:

print Modifier().toString(2)  

Carl

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CK> use:
CK> print Modifier().toString(2)

  Am I missing something here?

     >>> print Modifier.toString(2)
     2

-- 
Best regards,
 Gwyn                            mailto:gwyn@...

> CK> use:
> CK> print Modifier().toString(2)
> 
>   Am I missing something here?
> 
>      >>> print Modifier.toString(2)
>      2
> 

yes:

       >>> print Modifier().toString(2)

       >>> type( Modifier )
       <jclass org.python.core.PyJavaClass at 8331318>
       >>> type( Modifier() )
       <jclass org.python.core.PyJavaInstance at 14869110>

use of a (anonymous) instance rather than the class seems to be ok.

Best Regards

Carl

> -- 
> Best regards,
>  Gwyn                            mailto:gwyn@...
> 
> 
> 
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Tuesday, April 27, 2004, 3:55:29 PM, you wrote:

>> CK> use:
>> CK> print Modifier().toString(2)
>> 
>>   Am I missing something here?
>> 
>>      >>> print Modifier.toString(2)
>>      2
>> 

CK> yes:

  Well, Jeff pointed out I was missing the brackets!

CK>        >>> print Modifier().toString(2)

CK>        >>> type( Modifier )
CK>        <jclass org.python.core.PyJavaClass at 8331318>
CK>        >>> type( Modifier() )
CK>        <jclass org.python.core.PyJavaInstance at 14869110>

CK> use of a (anonymous) instance rather than the class seems to be ok.

  Yes, but I'm not sure that making the instance anonymous rather than
explicit really helps...  Although there's a question there as to
whether my reluctance to use that form is rooted in reality with the
current-generation of garbage collectors...

  I'm still slightly intrigued as to what's going on such that the
static "toString(int mod)" method on the class isn't being called.

  I tried the following to try & help ensure that the correct
type-conversion was occurring, but that made no difference...

>>> import java.lang.Integer as Integer
>>> import java.lang.reflect.Modifier as Modifier

>>> Modifier.toString(Integer.parseInt('2'))
'2'

  My guess is that either there's an conversion (to PyInteger?)
getting in the way somewhere but I've not idea how to either prove or
disprove the guess.

-- 
Best regards,
 Gwyn                            mailto:gwyn@...