Re: RESEND: How to retrieve the xml version string using SAX parser

[Patrick Haggerty <ha...@mindspring.com>]

Funny you should mention this. I was just reading the Java and XML book 
from O'Reilly about just this thing. Their spin on it was that the version 
of the XML document was specifically for the parser and was not for our 
humble eyes.

Here is the way that I got around it. If you look at the documentation on 
the SAXParser class you will find this wonderful method xmlDecl(int 
versionIndex, int encodingIndex, int standaloneIndex)

Looking at the source code you can come up with a little work around. Just 
override the method, get the info and let the parser do it's thing:

import org.apache.xerces.parsers.SAXParser;

public class MySAXParser extends SAXParser
{
   public void xmlDecl(int versionIndex, int encodingIndex, int 
standaloneIndex) throws Exception
   {
     String verInfo = "";
             if (versionIndex != -1)//-1 if it is ommited
                 verInfo += " version='" + 
fStringPool.toString(versionIndex) + "'";
             if (encodingIndex != -1)
                 verInfo += " encoding='" + 
fStringPool.toString(encodingIndex) + "'";
             if (standaloneIndex != -1)
                 verInfo += " standalone='" + 
fStringPool.toString(standaloneIndex) + "'";
             System.out.println("Hey, I got that declaration after 
all:<?xml" + verInfo + "?>");

     super.xmlDecl(versionIndex, encodingIndex, standaloneIndex);
   }
}

notice that the variable xmlInfo has all the information that you need. 
Then in your parsing application, just change the line:
XMLReader parser =
                 XMLReaderFactory.createXMLReader(
                     "org.apache.xerces.parsers.SAXParser");
to use our new parser:
XMLReader parser =
                 XMLReaderFactory.createXMLReader(
                     "MySAXParser");


That should take care of you!

Take care and I will talk to you soon!!!
At 10:28 AM 10/18/2000 -0700, you wrote:
>Hi,
>         How do I retrieve the xml version header from an XML document, i.e.
>the one <? xmlversion......?>.  This is not considered a PI.  Is there any
>method which retrieves the header?.  I am using xerces SAX parser.
>         Please help.
>
>Thanks,
>--Srikanth
>
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Cheers!
Hagg
That's Internet for:
Patrick E. Haggerty, III

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They are just too stupid to know any better