SV: SV: [jdom-interest] Line numbers

[Per Norrman]

Well, my interpretation of the original question was that
it was desirable to be able to track *all* elements to their
respective source locations, not just those (the one) that caused
an exception.

A couple of years ago, I did some work for a larger telecom 
company. In this case, all interfaces and interactions between 
their network nodes was defined in a synthesized xml document, and
I were doing the synthesization stuff. I can see, in hindsight, because
of circumstances that I will not comment on here, that it would have
been useful to annotate the synthesized document elements with
original source line numbers.

May be a far fetched use case, but still a use case.

/pmn


> -----Ursprungligt meddelande-----
> Från: jdom-interest-admin at jdom.org 
> [mailto:jdom-interest-admin at jdom.org] För Bradley S. Huffman
> Skickat: den 28 augusti 2003 17:56
> Till: jdom-interest at jdom.org
> Ämne: Re: SV: [jdom-interest] Line numbers 
> 
> 
> So back to the original question, wouldn't this work?
> 
>     int lineNumber = -1;
>     int columnNumber = -1;
>     try {
>         document = builder.build(file);
>     }
>     catch(JDOMException je) {
>         Throwable cause = je;
>         while(cause != null) {
>             cause = je.getCause();
>             if (cause instanceof SAXParseException) {
>                 lineNumber = (SAXParseException 
> cause).getLineNumber();
>                 columnNumber = (SAXParseException 
> cause).getColumnNumber();
>                 break;
>             }
>         }
>     }
> 
> The problem I have with storing line and column info. inside 
> elements is 
> after the first modification to the document the info. 
> probably becomes meaningless.  For example, read in a 
> document, fetch the root element and do something like
> 
>     root.addContent(new Text("\n\n\n"));
> 
> What are the line and column numbers of all of root's descendants?
> 
> Brad
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