TR: HSSFSerializer / Null Pointer exception

[PLISSON Sébastien (DSIT-XS/I)]

>  -----Message d'origine-----
> De :  PLISSON Sébastien (DSIT-XS/I)  
> Envoyé :      jeudi 1 août 2002 08:11
> À :   [EMAIL PROTECTED]
> Objet :       HSSFSerializer / Null Pointer exception
> 
> 
> Hi,
> 
> When i try to use the HSSFSerializer from java, using an XMLReader,
> i get a NullPointer Exception when i use the parse function.
> 
> I use POI, Xerces and xalan from cocoon 2.0.3 distribution.
> All is deployed on Websphere 3.5.6.
> 
> Any idea how to solve this problem ?
> 
> Thanks.
> Seb
> 
> Here is my code :
> 
> / Output XML to XLS
>               //
>               // Instantiate a TransformerFactory.
>               javax.xml.transform.TransformerFactory tFactory = 
>       
> javax.xml.transform.TransformerFactory.newInstance();
>               // Verify that the TransformerFactory implementation you are
> using
>               // supports SAX input and output (Xalan-Java does!).
>               if
> (tFactory.getFeature(javax.xml.transform.sax.SAXSource.FEATURE) &&
>       
> tFactory.getFeature(javax.xml.transform.sax.SAXResult.FEATURE))
>               {
>                 //System.out.println("sauveXMLToXLS - Debut
> transformation");
>                 // Cast the TransformerFactory to SAXTransformerFactory.
>                 javax.xml.transform.sax.SAXTransformerFactory saxTFactory
> =
>       
> ((javax.xml.transform.sax.SAXTransformerFactory) tFactory);
>                 // Create a Templates ContentHandler to handle parsing of
> the
>                 // stylesheet.
>                 javax.xml.transform.sax.TemplatesHandler templatesHandler
> =
>       
> saxTFactory.newTemplatesHandler();
>               
>                 // Create an XMLReader and set its ContentHandler.
>                 org.xml.sax.XMLReader reader =
>       
> org.xml.sax.helpers.XMLReaderFactory.createXMLReader();
>                 reader.setContentHandler(templatesHandler);
>               
>                 // Parse the stylesheet.
>                 reader.parse(xslFilename);
>               
>                 // Get the Templates object (generated during the parsing
> of the stylesheet)
>                 // from the TemplatesHandler.
>                 javax.xml.transform.Templates templates =
>       
> templatesHandler.getTemplates();
>                 // Create a Transformer ContentHandler to handle parsing
> of
>                 // the XML Source.
>                 javax.xml.transform.sax.TransformerHandler
> transformerHandler
>                                                                =
> saxTFactory.newTransformerHandler(templates);
>                 // Reset the XMLReader's ContentHandler to the
> TransformerHandler.
>                 reader.setContentHandler(transformerHandler);
>               
>                 // Set the ContentHandler to also function as a
> LexicalHandler, which
>                 // can process "lexical" events (such as comments and
> CDATA).
>       
> reader.setProperty("http://xml.org/sax/properties/lexical-handler";,
>       
> transformerHandler);
>               
>                 // Set up a Serializer to serialize the Result to a file.
>                 HSSFSerializer ser = new HSSFSerializer();
>                 ser.setOutputStream(xlsFile);
> 
>                 //org.apache.cocoon.serialization.XMLSerializer ser = new
> org.apache.cocoon.serialization.XMLSerializer();
>                 //ser.setOutputStream(System.out);
>               
>                 // The Serializer functions as a SAX ContentHandler.
>                 javax.xml.transform.Result result =
>                       new
> javax.xml.transform.sax.SAXResult((org.xml.sax.ContentHandler)ser);
>                 transformerHandler.setResult(result);
>                       
>                 // Parse the XML input document.
>                 reader.parse(xmlFilename); // Here i get NullPointer
> Exception
> 
> 
> Sébastien PLISSON
> DSIT XS / Infocentre
> Tél. : 30.13.90
> 

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