Custom XML Validation

> Hi –
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> 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).
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> 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.
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> 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?
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> Thanks for your time.
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> Kyle
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