jython-users

[Jython-users] How do i override a static Java method in Jython ?

[Erlend V <eb...@im...>]

Hi all!

I'm trying to look into using Jython with JUnit

in my Class that extends junit.framework.TestCase, i have

 def suite():
        "@sig public static junit.framework.Test suite()"
        print "suite called"
        return junit.framework.TestSuite("test.SimpleTest")


If I dont specify the "@sig", the static suite method is not overridden, and 
if I add the @sig, I get the problem shown below.

How can a Jython program override a static method?

Erlend
------
[evb@evb unittest]$ jythonc -p test SimpleTest.py
processing SimpleTest

Required packages:
  junit.swingui
  junit.framework
 
Creating adapters:
 
Creating .java files:
  SimpleTest module
    SimpleTest extends junit.framework.TestCase
 
Compiling .java to .class...
Compiling with args: ['/usr/local/ibmjdk1.3/bin/javac', '-classpath', 
'/usr/local/jython-2.0b2/jython.jar:.::/usr/local/ant/ant/lib/ant.jar:/usr/local/JacORB1_1/classes:/usr/local/JacORB1_1/lib/idl.jar:/usr/local/JacORB1_1/lib/jacorb.jar:/usr/local/jython-2.0b2/jython.jar:/usr/local/junit3.4/junit.jar:./jpywork::/usr/local/jython-2.0b2/Tools/jythonc:/home/evb/work/python/unittest/.:/usr/local/jython-2.0b2/Lib', 
'./jpywork/test/SimpleTest.java']
1  ./jpywork/test/SimpleTest.java:158: non-static variable this cannot be 
referenced from a static context
        PyObject inst = Py.jgetattr(this, "suite");
                                    ^
Note: ./jpywork/test/SimpleTest.java uses or overrides a deprecated API.
Note: Recompile with -deprecation for details.
1 error
 
ERROR DURING JAVA COMPILATION... EXITING

Re: [Jython-users] How do i override a static Java method in Jython ?

[D. J. H. <Dj....@ce...>]

In Java, static methods are /not/ virtual.  Overriding will not work the
way you expect if called through a base class method -- the derived static
method can only be called from derived code. =20

I don't have the exact language spec entry at-hand, but I hit this same
exact problem about a year ago (not with Jython, tho).

=09=09=09-=3D- D. J.


On Mon, 15 Jan 2001, Erlend V [iso-8859-1] B=F8e wrote:

> Hi all!
>=20
> I'm trying to look into using Jython with JUnit
>=20
> in my Class that extends junit.framework.TestCase, i have
>=20
>  def suite():
>         "@sig public static junit.framework.Test suite()"
>         print "suite called"
>         return junit.framework.TestSuite("test.SimpleTest")
>=20
>=20
> If I dont specify the "@sig", the static suite method is not overridden, =
and=20
> if I add the @sig, I get the problem shown below.
>=20
> How can a Jython program override a static method?
>=20
> Erlend
> ------
> [evb@evb unittest]$ jythonc -p test SimpleTest.py
> processing SimpleTest
>=20
> Required packages:
>   junit.swingui
>   junit.framework
> =20
> Creating adapters:
> =20
> Creating .java files:
>   SimpleTest module
>     SimpleTest extends junit.framework.TestCase
> =20
> Compiling .java to .class...
> Compiling with args: ['/usr/local/ibmjdk1.3/bin/javac', '-classpath',=20
> '/usr/local/jython-2.0b2/jython.jar:.::/usr/local/ant/ant/lib/ant.jar:/us=
r/local/JacORB1_1/classes:/usr/local/JacORB1_1/lib/idl.jar:/usr/local/JacOR=
B1_1/lib/jacorb.jar:/usr/local/jython-2.0b2/jython.jar:/usr/local/junit3.4/=
junit.jar:./jpywork::/usr/local/jython-2.0b2/Tools/jythonc:/home/evb/work/p=
ython/unittest/.:/usr/local/jython-2.0b2/Lib',=20
> './jpywork/test/SimpleTest.java']
> 1  ./jpywork/test/SimpleTest.java:158: non-static variable this cannot be=
=20
> referenced from a static context
>         PyObject inst =3D Py.jgetattr(this, "suite");
>                                     ^
> Note: ./jpywork/test/SimpleTest.java uses or overrides a deprecated API.
> Note: Recompile with -deprecation for details.
> 1 error
> =20
> ERROR DURING JAVA COMPILATION... EXITING
>=20
> _______________________________________________
> Jython-users mailing list
> Jyt...@li...
> http://lists.sourceforge.net/lists/listinfo/jython-users
>=20