Re: AW: [Jython-dev] work in progress

[Samuele P. <pe...@in...>]

Hi.

[Schmidmeier, Arno]
>  Yes they can be different. e.g. py passing
> -Duser.dir=~/something on the commandline of the java VM.
> 	I do not know which should be preferred, but my feeling says me that
> "" eqalsto System.getProperty("user.dir")should be preffered.
> 	However there might be a problem is the access to System.getProperty
> is restricted or if this property is not defined.
> 	I suggest therefore something like:
> 
> 	String FileName=null;
> 	try{
> 		FileName=System.getProperty("user.dir",null);
> 	}catch(SecurityException sec){}
> 	if (FileName==null)
> 		FileName=".";
> 	...
I should admit I had missed these aspects. In any case the expansion
happen when interpreting classpath and sys.path, so "." is preferable.
But I really worry about what happens on a Mac?
Unfortunately I have no access to such a machine and its jvms.

 	[Schmidmeier, Arno]  
> 	I do not understand this topic fully, I want to ask is following
> scenario possible:
> 	I have a java-package X with classes a and b.
> 	on the classpath (sys or jython) there are two distinct entries
> j1.jar and j2.jar. 
> 	j1.jar contains a and j2.jar contains b. Is this possible?
> 	Same for .py filesand directories.

The semantics for py modules will remain as in python, if one not plays with 
__path__ a py packages span over just one directory and its subdirs.
sys.path can contain only dirs (an extension for allowing zips and jars
should be not too difficult but it depends on what happens on CPython side
and for the moment I like to see what happen with the patch and get rid of
old and (hopefully few) new bugs, extending things should be easier
with a clean (so I hope) codebase.
The support for relative imports inside py pkgs should work as in CPython.
This should still be fixed in jythonc.
Concerning java with the patch:
* classpath is virtually extended with sys.path
classpath take over sys.path.
* py pkgs take over java pkgs, but the java classes in the shadowed pkg
 can be accessed through the py package
* dir and from import * for a java package now should really consider
the union of everything that's is in the dirs/jar on classpath and in the
dirs on sys.path.

regards, Samuele