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From "Luca Morandini" <spectrum.morand...@ipzs.it>
Subject R: Strings to SAX events
Date Fri, 08 Nov 2002 10:33:03 GMT
Ludovic,

we're writing a Transformer to produce SVG (and JPEG/PNG optionally) charts.
The idea is having the chart description and associated data in XML as
input, transform them, ending up with a nice SVG to be serialized.

We're using a charting library which doesn't produce a SAX stream, but
outputs the SVG element as a string, hence, the need to insert this XML
elements in the output SAX stream.

I hope this clears the matter :)

Luca Morandini
Istituto Poligrafico e Zecca dello Stato
lmorandini@ieee.org
spectrum.morandini@ipzs.it


> -----Messaggio originale-----
> Da: Ludovic de Beaurepaire [mailto:ludovic.debeaurepaire@axonie.com]
> Inviato: venerdì 8 novembre 2002 11.26
> A: cocoon-users@xml.apache.org
> Oggetto: Re: Strings to SAX events
>
>
> Luca
>
> Sorry if it is NOK, but i didn't understand why you want to add
> XML datas in
> the transformer instead of in your pipeline's generator ?
>
> Ludovic
> ----- Original Message -----
> From: "Luca Morandini" <spectrum.morandini@ipzs.it>
> To: <cocoon-users@xml.apache.org>
> Sent: Friday, November 08, 2002 11:11 AM
> Subject: R: Strings to SAX events
>
>
> > Ludovic,
> >
> > thanks for your kind answer, but we are not in an XSP page
> (we're writing
> a
> > Transformer instead), hence, your suggestion is not truly useful to us.
> >
> > Best regards,
> >
> > Luca Morandini
> > lmorandini@ieee.org
> >
> > > -----Messaggio originale-----
> > > Da: Ludovic de Beaurepaire [mailto:ludovic.debeaurepaire@axonie.com]
> > > Inviato: venerdì 8 novembre 2002 11.02
> > > A: cocoon-users@xml.apache.org
> > > Oggetto: Re: Strings to SAX events
> > >
> > >
> > > Try in a XSP the following, data is your xml string :
> > >
> > > <util:include-expr>
> > > <util:expr><xsp:expr>
> > > data
> > > </xsp:expr></util:expr>
> > > </util:include-expr>
> > >
> > >
> > >
> > > ----- Original Message -----
> > > From: "Luca Morandini" <spectrum.morandini@ipzs.it>
> > > To: <cocoon-users@xml.apache.org>
> > > Sent: Friday, November 08, 2002 10:55 AM
> > > Subject: Strings to SAX events
> > >
> > >
> > > > Folks,
> > > >
> > > >  We're in the process of writing a Transformer, which, of
> > > course, outputs
> > > > SAX
> > > >  events... but, in the midst of this stream , we need to insert an
> > > >  XML element stored in a string.
> > > >
> > > >  To do this we're groping in the dark trying something like this:
> > > >
> > > >   JaxpParser respParser = new JaxpParser();
> > > >   respParser.parse( new InputSource(new StringReader(str)),
> > > >           new EmbeddedXMLPipe(contentHandler));
> > > >
> > > >  Which fails giving this:
> > > >  org.apache.cocoon.ProcessingException: Failed to execute pipeline.:
> > > >  java.lang.ClassCastException
> > > >  ...
> > > >  Caused by: java.lang.ClassCastException
> > > >   at
> > > >
> > > >
> > > com.lucamorandini.charts.ChartTransformer.endElement(ChartTransfor
> > > mer.java:6
> > > > 55)
> > > >   at
> > > >
> > > >
> > > org.apache.cocoon.components.sax.XMLByteStreamInterpreter.parse(XM
> > > LByteStrea
> > > > mInterpreter.java:129)
> > > >   at
> > > >
> > > >
> > > org.apache.cocoon.components.sax.XMLByteStreamInterpreter.deserial
> > > ize(XMLByt
> > > > eStreamInterpreter.java:102)
> > > >   at
> > > >  org.apache.cocoon.components.pipeline.CachingEventPipeline.process
> > > >  (CachingEventPipeline.java:219)
> > > >   ... 44 more
> > > >
> > > >  java.lang.ClassCastException
> > > >   at
> > > >
> > > >
> > > com.lucamorandini.charts.ChartTransformer.endElement(ChartTransfor
> > > mer.java:6
> > > > 55)
> > > >   at
> > > >
> > > >
> > > org.apache.cocoon.components.sax.XMLByteStreamInterpreter.parse(XM
> > > LByteStrea
> > > > mInterpreter.java:129)
> > > >   at
> > > >
> > > >
> > > org.apache.cocoon.components.sax.XMLByteStreamInterpreter.deserial
> > > ize(XMLByt
> > > > eStreamInterpreter.java:102)
> > > >   at
> > > >  org.apache.cocoon.components.pipeline.CachingEventPipeline.process
> > > >  (CachingEventPipeline.java:219)
> > > >   at
> > > >
> > > >
> > > org.apache.cocoon.components.pipeline.CachingStreamPipeline.proces
> > > s(CachingS
> > > > treamPipeline.java:399)
> > > >
> > > >  The classes we use are:
> > > >   org.apache.avalon.excalibur.xml.JaxpParser;
> > > >   org.xml.sax.InputSource;
> > > >   java.io.StringReader;
> > > >   org.apache.cocoon.xml.EmbeddedXMLPipe;
> > > >
> > > >  And the environment is:
> > > >   Solaris 5.8
> > > >   JDK 1.4.1_01
> > > >   Tomcat 4.1.12-LE-jdk14
> > > >   Cocoon 2.0.3
> > > >
> > > >  May someone please help us ?
> > > >
> > > >  Thanks in advance,
> > > >
> > > > Piero De Nicola & Luca Morandini
> > > >
> > > >
> > > >      We are protected from the virus by Norton Antivirus
> > > Corporate Edition
> > > >
> > > >
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