Hi Mihael -
I ran in to a similar problem parsing data using the EXPAT XML parser
(this was before the xml-sax opcode). Different parser but the same type
of logic applies. Instead of one handler, I have a procedure for each of
the start, end, and character data events.
The trick for me was to use a stack to keep track of the context. So,
when I hit a start tag event, I'd add that tag to the top of the stack,
and clear my "currentValue" field - this will make more sense later. In
retrospect, it would probably have been better to use the XPath as the
stack element, in case there are tags with the same name but different
parent tags. I had a data structure that contained the data I was
interested in. Using your example (quoted below), suppose I only care
about the Nummer for each Kundenstamm, but not the Name. I also want the
whole address. I'd have something like:
Kundenstamm...
DS qualified
Nummer...
like(NummerField)
Anshrift...
DS qualified
Plz...
like(PlzField)
Ort...
like(OrtField)
Strasse...
like(StrasseField)
Now, each time I have an end tag event, I do this:
currentTag = pop(stack);
select currentTag;
when currentTag = '/kundenstamm/nummer';
Kundenstamm.Nummer = currentValue;
when currentTag = '/kundenstamm/nummer/plz';
Kundenstamm.Anshrift.Plz = currentValue;
... and so on. Of course currentValue has to be either a static variable
or a global variable so that it can accumulate data between calls to the
handler.
HTH,
Adam
Mihael Knezevic wrote on 11/04/2007 10:07:54:
xml document:
<?xml version="1.0" encoding="ISO-8859-15" ?>
<kundenstamm>
<nummer>358</nummer>
<name>Dirk Rossmann GmbH</name>
<anschrift>
<plz>32425</plz>
<ort>Minden</ort>
<strasse>Königswall 314</strasse>
</anschrift>
</kundenstamm>
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