Subject: Custom XML Validation

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Subject: Custom XML Validation

Subject: Custom XML Validation

2007-08-21 - By Kyle Cunningham

Back
Hi -

I'm writing an XMLValidator tool that first parses a file against the
schema (using Xerces) then runs custom xml checks if the build was
successful. I'm using a SAXBuilder for this and just calling the
build() method to parse the XML document. The additional checks include
things like making sure the content of required elements is present, etc
(I couldn't find a way to specify this in an XML schema).

My problem is that I am not able to determine the line number a
"problem" element lives at within the xml document when I encounter
something in the additional processing routine.

I tried throwing a SAXParseException and calling the getLineNumber()
method, but the exception seems to have no knowledge of the document. I
also read some stuff about using a SAXHandler and setting the document
location, but I couldn't really get my head around it enough to
understand how I could use it. I'm fairly new to JDOM. Is there any
easy way to accomplish this?

Thanks for your time.

Kyle

<html xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas
-microsoft-com:office:word" xmlns="http://www.w3.org/TR/REC-html40">

<head>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii">
<meta name=Generator content="Microsoft Word 11 (filtered medium)">
<style>

</style>

</head>

<body lang=EN-US link=blue vlink=purple>

<div class=Section1>


Hi – <o:p></o:p>


<o:p> </o:p>


I’m writing an
XMLValidator tool that first parses a file against the schema (using Xerces)
then runs custom xml checks if the build was successful.  I’m using a
SAXBuilder for this and just calling the build() method to parse the XML
document.  The additional checks include things like making sure the
content of
required elements is present, etc (I couldn’t find a way to specify this
in an XML schema).<o:p></o:p>


<o:p> </o:p>


My problem is that I am not
able to determine the line number a “problem” element lives at
within the xml document when I encounter something in the additional processing
routine.  <o:p></o:p>


<o:p> </o:p>


I tried throwing a
SAXParseException and calling the getLineNumber() method, but the exception
seems to have no knowledge of the document.  I also read some stuff about
using
a SAXHandler and setting the document location, but I couldn’t really get
my head around it enough to understand how I could use it.  I’m
fairly
new to JDOM.  Is there any easy way to accomplish this?<o:p></o:p>


<o:p> </o:p>


Thanks for your time.<o:p><
/o:p>


<o:p> </o:p>


Kyle<o:p></o:p>


<o:p> </o:p>


 <o:p></o:p>


<o:p> </o:p>


 <o:p></o:p>


<o:p> </o:p>


<o:p> </o:p>

<o:p> </o:p>

</div>

</body>

</html>

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