Trying to embed gnu.xml.dom.DomDocumentBuilderFactory

[Mohsen Saboorian]

I filled a bug report:
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31647

Andrew, newing DomDocumentBuilderFactory workaround didn't work for
me. Do you know any other workaround ;)?

Thanks.

On 4/20/07, Andrew Haley <aph@littlepinkcloud.com> wrote:
> Mohsen Saboorian writes:
>  > Thanks,
>  > There was no DomDocumentBuilderFactory entry in the output of command:
>  > nm --demangle=java myapp.exe
>  > even when I explicitly imported and did "new
>  > DomDocumentBuilderFactory()" in the code.
>  >
>  > I extracted a portion of libgcj-4.2.0.jar (the whole content of
>  > gnu.xml.* package), say gcj-dom.jar, and compiled and linked it with
>  > my application. The result executable has DomDocumentBuilderFactory
>  > but this time I'm facing with NoClassDefFoundError for
>  > gnu.xml.dom.DomImpl.
>  > Again I put the trivial code new DomImpl() and linked the app. This
>  > time again I'm facing with:
>  >
>  > java.lang.NoClassDefFoundError: gnu.xml.dom.DomImpl
>  > java.lang.Class.initializeClass(zekr_static_olpc.exe)
>  > gnu.xml.dom.ImplementationSource.<clinit>(zekr_static_olpc.exe)
>  > java.lang.Class.initializeClass(zekr_static_olpc.exe)
>  > java.lang.Class.newInstance(zekr_static_olpc.exe)
>  > org.w3c.dom.bootstrap.DOMImplementationRegistry.newInstance(zekr_static_olpc.exe)
>  > gnu.xml.dom.DomDocumentBuilderFactory.<init>(zekr_static_olpc.exe)
>  > net.sf.zekr.engine.xml.XmlReader.<init>(zekr_static_olpc.exe)
>  > net.sf.zekr.common.config.ApplicationConfig.extractLangProps(zekr_static_olpc.exe)
>  > ...
>  >
>  > It's strange that although there exists some entry for gnu.xml.dom.DomImpl with:
>  > nm --demangle=java myapp.exe
>  > it gives me that error.
>  >
>  > I should also say that I tried to embed xercesImpl.jar with my app, setting:
>  > javax.xml.parsers.DocumentBuilderFactory=org.apache.xerces.jaxp.DocumentBuilderFactoryImpl
>  > so that it uses xerces instead of gnu.xml.*. It gives me again a
>  > NoClassDefFoundError.
>  >
>  > It seems that even when a class file is embedded in a static binary,
>  > class loader (java.lang.Class.initializeClass()) cannot load that.
>
> I think this is a bug in libgcj.  The NoClassDefFoundError is
> reporting the wrong missing class.  It's actually one of
> DomDocumentBuilderFactory's dependencies that isn't being found.  If
> you use "jcf-dump -v" on the class you'll see what its dependencies
> are.
>
> I'm sorry this is turning into such a PITA.
>
> Andrew.
>