[Jython-users] Import error on class/package name clash

[John D. <Joh...@qs...>]

Folks

I'm writing a script to load all the classes in a java application, and have
struck a problem when a subpackage has the same name (but with different
case) as a class.

For example, in package QSI.Payment we have sub-package cardenquiry, and
class CardEnquiry.  Then, when I try to import the class, I get the
following stack trace:

//c/src/server-release-1-2-patches$ jython
Jython 2.1a3 on java1.3.1 (JIT: null)
Type "copyright", "credits" or "license" for more information.
>>> import QSI.Payment.cardenquiry.CardNumberEnquiry
Traceback (innermost last):
  File "<console>", line 1, in ?
java.lang.NoClassDefFoundError: QSI/Payment/cardenquiry (wrong name:
QSI/Payment/CardEnquiry)
        at java.lang.ClassLoader.defineClass0(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:486)
        at
java.security.SecureClassLoader.defineClass(SecureClassLoader.java:111)
        at java.net.URLClassLoader.defineClass(URLClassLoader.java:248)
        at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:297)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:286)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:253)
        at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:313)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:120)
        at
org.python.core.SyspathJavaLoader.loadClass(SyspathJavaLoader.java)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:253)
        at org.python.core.Py.findClassEx(Py.java)
        at
org.python.core.SysPackageManager.findClass(SysPackageManager.java)
        at org.python.core.PackageManager.findClass(PackageManager.java)
        at
org.python.core.SysPackageManager.findClass(SysPackageManager.java)
        at org.python.core.PyJavaPackage.__findattr__(PyJavaPackage.java)
        at org.python.core.PyObject.impAttr(PyObject.java)
        at org.python.core.imp.import_next(imp.java)
        at org.python.core.imp.import_logic(imp.java)
        at org.python.core.imp.import_name(imp.java)
        at org.python.core.imp.importName(imp.java)
        at org.python.core.ImportFunction.load(__builtin__.java)
        at org.python.core.ImportFunction.__call__(__builtin__.java)
        at org.python.core.PyObject.__call__(PyObject.java)
        at org.python.core.__builtin__.__import__(__builtin__.java)
        at org.python.core.imp.importOne(imp.java)
        at org.python.pycode._pyx1.f$0(<console>:1)
        at org.python.pycode._pyx1.call_function(<console>)
        at org.python.core.PyTableCode.call(PyTableCode.java)
        at org.python.core.PyCode.call(PyCode.java)
        at org.python.core.Py.runCode(Py.java)
        at org.python.core.Py.exec(Py.java)
        at org.python.util.PythonInterpreter.exec(PythonInterpreter.java)
        at
org.python.util.InteractiveInterpreter.runcode(InteractiveInterpreter.java)
        at
org.python.util.InteractiveInterpreter.runsource(InteractiveInterpreter.java
)
        at
org.python.util.InteractiveInterpreter.runsource(InteractiveInterpreter.java
)
        at org.python.util.InteractiveConsole.push(InteractiveConsole.java)
        at
org.python.util.InteractiveConsole.interact(InteractiveConsole.java)
        at org.python.util.jython.main(jython.java)

java.lang.NoClassDefFoundError: java.lang.NoClassDefFoundError:
QSI/Payment/cardenquiry (wrong name:
 QSI/Payment/CardEnquiry)
>>>

It appears that jython is trying to import each of the packages first.  Can
anyone point me in the right direction on this?  Am I missing something
simple?

Cheers ............... JohnD

    do { nothing() } while ( ! hearFromMe ); 

John Dickson
Architect

QSI Payments, Inc

Ph:      +61-7-3224 9806
Fax:     +61-7-3210 2566
Email:   mailto:joh...@qs...
URL:     http://www.qsipayments.com/
_____________________________________________
QSI Payments, Inc
Level 22
300 Adelaide Street
BRISBANE, QLD, AUSTRALIA 4000

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