Re: JAXB accesors: ClassLoader.defineClass

Hi Jeroen,

Thank you for the quick reply. You're right. JAXB is loading the .class
file as a resource previous to the defineClass call. More specifically, in
the AccessorInjector#tailor method:

    private static byte[] tailor( String templateClassName, String
newClassName, String... replacements ) {
        InputStream resource;
        if(CLASS_LOADER!=null)
            resource =
CLASS_LOADER.getResourceAsStream(templateClassName+".class");
        else
            resource =
ClassLoader.getSystemResourceAsStream(templateClassName+".class");
        if(resource==null)
            return null;

        return
ClassTailor.tailor(resource,templateClassName,newClassName,replacements);
    }

But doesn't IKVM redirect resources to the JAR file? For example, when
loading a WSDL I've seen things like:
INFO: Creating Service {http://blah/blah}Blah_v1 from WSDL:
jar:file:/C:/.virtual-ikvm-home/assembly/my-assembly/resources/my-assembly.jar!/some.wsdl

Kind regards,
Gerardo


On Mon, Mar 24, 2014 at 7:07 PM, Jeroen Frijters <[email protected]> wrote:

> Hi Gerardo,
>
> I think that JAXB is trying to load a .class file from an ikvmc compiled
> assembly and that doesn't really work, because the .class file generated by
> the IKVM runtime is a stub, not the real class.
>
> I'm not sure how to solve this. If the code assumes that .class files can
> always be loaded as a resource, then it isn't really compatible with ikvmc
> (at least, without any manual tweaking).
>
> Regards,
> Jeroen
>
> > -----Original Message-----
> > From: Gerardo Lastra [mailto:[email protected]]
> > Sent: Monday, March 24, 2014 17:38
> > To: [email protected]
> > Subject: [Ikvm-developers] JAXB accesors: ClassLoader.defineClass
> >
> > Hi all,
> >
> > I'm doing some research on the possibility of running a Java SOAP WS
> > client (using Apache CXF and JAXB) on .NET through ikvmc. I've managed
> > to create the .dll so far, but when I'm starting the application (when
> > the JAXB content is starting), I get the following error (names
> > replaced):
> >
> > Mar 24, 2014 5:20:55 PM com.sun.xml.bind.v2.runtime.reflect.opt.Injector
> > inject
> > WARNING: duplicate class definition bug occured? Please report this :
> > a/b/c/ThisIsAJaxbType$JaxbAccessorF_someField
> > java.lang.NoClassDefFoundError:
> > a/b/c/ThisIsAJaxbType$JaxbAccessorF_someField (type not found in my-
> > assembly, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null)
> >         at IKVM.NativeCode.java.lang.ClassLoader.defineClass1(Unknown
> > Source)
> >         at java.lang.ClassLoader.defineClass1(Native Method)
> >         at java.lang.ClassLoader.defineClass(ClassLoader.java:814)
> >         at java.lang.ClassLoader.defineClass(ClassLoader.java:656)
> >         at java.lang.reflect.Method.invoke(Method.java:597)
> >         at
> > com.sun.xml.bind.v2.runtime.reflect.opt.Injector.inject(Injector.java
> > :205)
> >         at
> > com.sun.xml.bind.v2.runtime.reflect.opt.Injector.inject(Injector.java
> > :85)
> >         at
> > com.sun.xml.bind.v2.runtime.reflect.opt.AccessorInjector.prepare(Acce
> > ssorInjector.java:89)
> >         at
> > com.sun.xml.bind.v2.runtime.reflect.opt.OptimizedAccessorFactory.get(
> > OptimizedAccessorFactory.java:167)
> >         at
> > com.sun.xml.bind.v2.runtime.reflect.Accessor$FieldReflection.optimize
> > (Accessor.java:279)
> >         at
> > com.sun.xml.bind.v2.runtime.property.SingleElementLeafProperty.<init>
> > (SingleElementLeafProperty.java:82)
> >         at
> > java.lang.reflect.Constructor.newInstance(Constructor.java:522)
> >         at
> > com.sun.xml.bind.v2.runtime.property.PropertyFactory.create(PropertyF
> > actory.java:124)
> >         at
> > com.sun.xml.bind.v2.runtime.ClassBeanInfoImpl.<init>(ClassBeanInfoImp
> > l.java:179)
> >         at
> > com.sun.xml.bind.v2.runtime.JAXBContextImpl.getOrCreate(JAXBContextIm
> > pl.java:515)
> >
> >  ... stacktrace continues.
> >
> > I think the problem is either JAXB is using the wrong ClassLoader when
> > defining the injected classes, or there's a problem in IKVM itself. Any
> > ideas?
> >
> > Thank you!
> > Gerardo
>

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