Integrating Apache FOP in an Eclipse RCP app gives IncompatibleClassChangeError

[Martin Kristensen-2]

Some parts of this message have been removed. Learn more about Nabble's security policy.

Hi,

 

I’m getting this error when running Apache FOP as part of an Eclipse RCP application.

 

java.lang.IncompatibleClassChangeError: Class org.apache.fop.fo.FOTreeBuilder does not implement the requested interface org.xml.sax.ContentHandler

           at com.sun.org.apache.xml.internal.serializer.ToSAXHandler.startDocumentInternal(Unknown Source)

           at com.sun.org.apache.xml.internal.serializer.SerializerBase.startDocument(Unknown Source)

           at rd_adsml_financials_fo.transform()

           at com.sun.org.apache.xalan.internal.xsltc.runtime.AbstractTranslet.transform(Unknown Source)

           at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(Unknown Source)

           at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(Unknown Source)

           at dk.reklamedata.archive.DocConverter.xmlToPdf(DocConverter.java:64)

 

DocConverter.xmlToPdf is a simple XML to PDF conversion, copied from an official Apache FOP example, which works fine if I run it as a separate class. I have created a separate Eclipse plug-in with all the required Apache FOP jars, which I suppose is the way to do it with the Eclipse platform.

 

Anyone else had similar problems when integrating Apache FOP in an Eclipse RCP app?

 

Best regards,

Martin Kristensen / Developer
Reklamedata A/S · Vordingborggade 18-22 · DK-2100 København Ø
Tel [phone] · Fax [phone] · Web www.reklamedata.dk
Tel Dir [phone] · Mob [phone] · Mail mk@...

The information in this message is confidential. It is intended solely for the addressee. Access to this message by anyone else is unauthorized. If you are not the intended recipient, do not disclose, copy, or distribute the message without express permission from the sender. Please contact the sender if you have recieved this message in error.

 

 

[Jeremias Maerki-2]

FOTreeBuilder does indirectly implement ContentHandler (it's a
DefaultHandler subclass). So what you get here is really strange. I've
never seen this. My only explanation is some kind of class loader
confusion, i.e. the ContentHandler expected by the ToSAXHandler is
a different one from the one accessible in the context of FOP. But since
you seem to be using Sun's own Xalan fork (the JDK default), that seems
somewhat unlikely. Except if something loaded some JAXP classes with a
special class loader that does not consult the system class loader.
Something OSGi-ish maybe? I don't know.

Good luck finding the trouble spot!

On 09.06.2008 15:50:45 Martin Kristensen wrote:

> Hi,
>  
> I'm getting this error when running Apache FOP as part of an Eclipse RCP application.
>  
> java.lang.IncompatibleClassChangeError: Class org.apache.fop.fo.FOTreeBuilder does not implement the requested interface org.xml.sax.ContentHandler
>            at com.sun.org.apache.xml.internal.serializer.ToSAXHandler.startDocumentInternal(Unknown Source)
>            at com.sun.org.apache.xml.internal.serializer.SerializerBase.startDocument(Unknown Source)
>            at rd_adsml_financials_fo.transform()
>            at com.sun.org.apache.xalan.internal.xsltc.runtime.AbstractTranslet.transform(Unknown Source)
>            at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(Unknown Source)
>            at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(Unknown Source)
>            at dk.reklamedata.archive.DocConverter.xmlToPdf(DocConverter.java:64)
>  
> DocConverter.xmlToPdf is a simple XML to PDF conversion, copied from an
> official Apache FOP example, which works fine if I run it as a separate
> class. I have created a separate Eclipse plug-in with all the required
> Apache FOP jars, which I suppose is the way to do it with the Eclipse
> platform.
>  
> Anyone else had similar problems when integrating Apache FOP in an Eclipse RCP app?

<snip/>


Jeremias Maerki


---------------------------------------------------------------------
To unsubscribe, e-mail: fop-users-unsubscribe@...
For additional commands, e-mail: fop-users-help@...

[Fabrice Dubach]

Hi,

I had exactly the same error in the same context. How I solve it :

I have renouced to build a separate plug-in which is supposed to encapsulated Apache FOP libraries.

I have included directly all needed jars in my own RCP application in a simple "lib" folder, than I linked them to my application adding them in the "classpath" section on the "runtime" page of the "plugin.xml" file.

It works great, even when exporting the corresponding "product" that I made from this RCP app.

Hope it's help,

Fabrice Dubach

Martin Kristensen-2 wrote:

Hi,

I'm getting this error when running Apache FOP as part of an Eclipse RCP application.
 java.lang.IncompatibleClassChangeError:
(...)
I have created a separate Eclipse plug-in with all the required Apache FOP jars, which I suppose is the way to do it with the Eclipse platform.

[Martin Kristensen-2]

Thanks for the help, both of you who answered. One of my colleagues
succeeded in doing it by making a plug-in that contains both all the FOP
jars and all the code that accesses them.

Martin


-----Original Message-----
From: Fabrice Dubach [mailto:fabrice92@...]
Sent: 12. juni 2008 12:05
To: fop-users@...
Subject: Re: Integrating Apache FOP in an Eclipse RCP app gives
IncompatibleClassChangeError


Hi,

I had exactly the same error in the same context. How I solve it :

I have renouced to build a separate plug-in which is supposed to
encapsulated Apache FOP libraries.

I have included directly all needed jars in my own RCP application in a
simple "lib" folder, than I linked them to my application adding them in
the
"classpath" section on the "runtime" page of the "plugin.xml" file.

It works great, even when exporting the corresponding "product" that I
made
from this RCP app.

Hope it's help,

Fabrice Dubach


Martin Kristensen-2 wrote:
>
> Hi,
>
> I'm getting this error when running Apache FOP as part of an Eclipse
RCP
> application.
>  java.lang.IncompatibleClassChangeError:
> (...)
> I have created a separate Eclipse plug-in with all the required Apache
FOP
> jars, which I suppose is the way to do it with the Eclipse platform.
>
--
View this message in context:
http://www.nabble.com/Integrating-Apache-FOP-in-an-Eclipse-RCP-app-gives
-IncompatibleClassChangeError-tp17733288p17796549.html
Sent from the FOP - Users mailing list archive at Nabble.com.


---------------------------------------------------------------------
To unsubscribe, e-mail: fop-users-unsubscribe@...
For additional commands, e-mail: fop-users-help@...


---------------------------------------------------------------------
To unsubscribe, e-mail: fop-users-unsubscribe@...
For additional commands, e-mail: fop-users-help@...