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From Baback Elmieh <belm...@ccs.neu.edu>
Subject Stylesheet serialization problem
Date Thu, 03 Aug 2000 22:14:58 GMT
Hi, 

I'm having a problem with the org.apache.xalan.xslt.StylesheetRoot 
class, I noticed that it was a Serializable class so I tried to write a 
simple program to write a compiled stylesheet to file and I seem to be 
bumping into a NotSerializableException. Here is my stack trace:

org.apache.xalan.xpath.xml.StringToStringTable
  java.io.NotSerializableException:
     org.apache.xalan.xpath.xml.StringToStringTable
  void java.io.ObjectOutputStream.writeObject(java.lang.Object)
  void com.winwin.xmlsystem.testSimpleObj.main(java.lang.String[])

My code that produces this bug is as follows (I have made the xsl 
inline just in case it's form is the problem, it is pretty much the 
simplest valid XSL file I could think of) 

import org.apache.xalan.xslt.*;
import java.io.*;

class testSimpleObj
{
  public static void main (String[] args)
  {
    StylesheetRoot compiledXSL = null;

    // some simple xsl
    String xslText = "<?xml version='1.0' encoding='iso-8859-1'?>" +
"<xsl:stylesheet xmlns:xsl='http://www.w3.org/XSL/Transform/1.0'>" +
"<xsl:template match='/'>" +
"<xsl:value-of select='.' />" +
"</xsl:template>" +
"</xsl:stylesheet>";

    try {
      // compile the XSL file as per the Getting Started instructions
      // on Xalan website:

      XSLTProcessor processor = XSLTProcessorFactory.getProcessor();
      InputStream xslis= new ByteArrayInputStream(xslText.getBytes());
      XSLTInputSource xslSource = new XSLTInputSource(xslis);
      compiledXSL = processor.processStylesheet(xslSource);
    }
    catch(org.xml.sax.SAXException e)
    {
      System.err.println(e.getMessage());
      e.printStackTrace();
    }
    if (compiledXSL != null)
    {
      // try to write it if the parse went okay:
      try {
        FileOutputStream os = new FileOutputStream("style.obj");
        ObjectOutputStream bOut = new ObjectOutputStream(os);
        bOut.writeObject(compiledXSL);
      }
      catch (IOException e)
      {
        System.err.println(e.getMessage());
        e.printStackTrace();
      }
    }
  }
}

Could anyone let me know if this is a reproducable bug or if I'm just 
hitting something weird?

Thanks,
- Baback


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