jython-users

[Jython-users] Error when attempting to create a Proxied object with a constructor

[Max M. <max...@ma...>]

Hi,
	So I've got the PythonInterpreter running inside my Java app  
(thanks to everyone for the pointers to PyServlet example) and I  
successfully get a Proxied class object from this bit of code  that  
looks something like:

         interpreter().execfile(testFile.getAbsolutePath());
	
	PyObject cls = interpreter().get("Test");

          Object o = cls.__tojava__(Class.class);

	Class testClass = (Class)o;

This testClass is the class object for the Test class file read in  
from this Test.py:

from com.webobjects import appserver

class Test(appserver.WOComponent):

	def testName(self):
		"@sig public String testName()"
		return "Hello World"

	So the catch is that a subclass of WOComponent must be  
created with a one argument constructor, soemthing that would  
normally look like Test t = new Test(aWOContext).  So from the  
created Class object I grab the correct constructor and then attempt  
to create the object at which point I get the following exception:

code:
            wocomponent = constructor.newInstance(new Object[] {  
aWOContext });

Exception:

Traceback (innermost last):
  (no code object) at line 0
ImportError: no module named main

Anyone know offhand? Can you create a proxied object via a  
constructor off of the Class object or have I somehow bungled my  
jython environment?  Thanks for any help.

Regards,
	Max







		

Re: [Jython-users] Error when attempting to create a Proxied object with a constructor

[<bc...@wo...>]

[Max Muller]

>Hi,
>	So I've got the PythonInterpreter running inside my Java app  
>(thanks to everyone for the pointers to PyServlet example) and I  
>successfully get a Proxied class object from this bit of code  that  
>looks something like:
>
>         interpreter().execfile(testFile.getAbsolutePath());
>	
>	PyObject cls = interpreter().get("Test");
>
>          Object o = cls.__tojava__(Class.class);
>
>	Class testClass = (Class)o;

I don't think we ever tested this when the code was create with
exec/execfile. I believe it works when the python code is placed in a
module. The proxy tries to import the module that the code was compiled
from.

Do you really need to call the java Constructor directly? Normally it it
a lot easier to simple call the python class:

  PyObject instance = cls.__call__(Py.java2py(aWOContext));

regards,
finn