Re: [Simple-support] [nbdev] ClassDefNotFoundError

[Wessam A. R. <wes...@gm...>]

hey david,

Thanks for the note. I did what you suggested but still i get this same
error:

java.lang.ClassCastException: com.sun.xml.stream.ZephyrParserFactory cannot
be cast to javax.xml.stream.XMLInputFactory
 at javax.xml.stream.XMLInputFactory.newInstance(XMLInputFactory.java:136)
 at org.simpleframework.xml.stream.NodeBuilder.<clinit>(NodeBuilder.java:48)
Caused: *java.lang.ExceptionInInitializerError
* at org.simpleframework.xml.load.Persister.write(Persister.java:687)
 at org.simpleframework.xml.load.Persister.write(Persister.java:669)
 at org.simpleframework.xml.load.Persister.write(Persister.java:650)
 at org.simpleframework.xml.load.Persister.write(Persister.java:629)
 at org.netbeans.shapesample.GraphSceneImpl.generateXML(GraphSceneImpl.java
:152


Let me tell you what i'm trying to do here. I'm using an external library
called Simple Framework http://simple.sourceforge.net/ for generating the
XML file from the diagram. I created a moudle suite and added to it this
library as a library wrapper and also added a module which contains my
appliction that will use the library. This application is just topcomponent
and graphscene implementation. inside dragndrop accept method, i call a
function that generates xml using this piece of code which i got from a
tutorial on the website of this library :


java.io.File result = new java.io.File("example.xml");

Example example=new Example("Example Message",123);

org.simpleframework.xml.Serializer serializer = new
org.simpleframework.xml.load.Persister();

serializer.write(example, result);

it doesn't work at all inside a module project while it works perfectly and
generates the xml file in a standard java project.

i asked the help of the developer who wrote this library and that was his
reply:


Your NoClassDefFoundError is caused by a failure to

load a suitable StAX implementation from the static

initializer. If you are using Java 5 then you need the

StAX API and a StAX implementation. Both come with the

download in the lib directory.
so what i did is that i wrapped the stax api and implementation inside the
library wrapper i have together with the rest of the library jar file. i
then added this library as a dependency to my application module.

I'm really stuck with this for 3 days and i dunno what else i can do to fix
it. can you help me with it?

Thanks in advance

Wessam




On 8/20/07, David Van Couvering <da...@va...> wrote:
>
> You have to make sure that the package you want to have accessible are
> exported as friends.  You do this through the project's
> Properties->API Versioning, then click on [Add...] under "Public
> Packages"
>
> Then in the module that uses the package, you have to add your module
> as a Library.  You do this thorugh the project's
> Properties->Libraries.  Click on [Add...].  Make sure you click on
> "Show Non-API modules", and then you can type in the name of your
> module to search for it.
>
> David
>
> On 8/20/07, Wessam Abd Rabo <wes...@gm...> wrote:
> > hi toni, i still get the ClassDefNotFoundError exception even after
> creating
> > the library wrapper for my external library. the strange thing is that
> when
> > i add this same library in a java application and not a module project
> it
> > works perefectly. once i try it out in a module, it craches. I call it
> > inside a class implementation of a GraphScene, can this be contributing
> to
> > the problem?
> >
> > thanks again
> > wessam
> >
> >
> >
> >
> > >
> > >
> > > On 8/20/07, Anton Epple <ep...@ge... > wrote:
> > > > Hi Wessam,
> > > >
> > > > create a  library wrapper module for your xml serialization library:
> > > >
> > http://wiki.netbeans.info/wiki/view/DevFaqWrapperModules
> > > >
> > > > then you can find it in the modules list.
> > > >
> > > > best,
> > > > Toni
> > > >
> > > > Wessam Abd Rabo wrote:
> > > >
> > > > > Hi,
> > > > >
> > > > > I'm developing a module in netbeans in which i use an external
> library
> > > > > called simple framework for XML serialization. I just call a
> function
> > > > > inside a class that extends GraphScene class. on exectuting this
> code,
> > > > > a ClassDefNotFountError exception is thrown. I don't include this
> > > > > library in the module dependency cause i don't know how to do this
> if
> > > > > the library is not added to the list of modules of nb. I tried
> putting
> > > > > the jar file of this library in all nb folders but still i cant
> find
> > > > > it in the modules list. so i just added the packages of this
> library
> > > > > to the source packages of my module. I don't know if this
> contibutes
> > > > > to the problem or have nothing to do with it. also a null pointer
> > > > > exception is thrown the 2nd time the function is called. the
> strange
> > > > > thing is when i use this same piece of code in a java application,
> not
> > > > > a module application, it runs perfectly. can anyone help me with
> this?
> > > > >
> > > > > Thanks in advance,
> > > > >
> > > > > Wessam
> > > >
> > > >
> > >
> > >
> >
> >
>