XML/XSD generation with SAX
Hello,
I'd like to generate xsd files from flat files.
I use an org.xml.sax.XMLReader implementation to do so.
My class sets up an org.xml.sax.ContentHandler on which I call
startElement(String namespaceURI,
String localName,
String qName,
Attributes atts)
when needed as well as
endElement(String namespaceURI,
String localName,
String qName)
My problem is that I only want to output elements which hold their values in attributes
like <xsd:enumeration value="YC4"/>.
My parser allways generates <xsd:enumeration value="YC4"></xsd:enumeration>
instead, but I need no end element tag.
The parser does not like ommiting the endElement() method call, at least I did not find out how to manage this. If I omit it, the vm runs out of memory.
Is there a way to handle the parsers behavior so that I get it like <xsd:enumeration value="YC4"/>?
Thanks
Matthias
[1005 byte] By [
fd1380a] at [2007-11-26 19:17:32]
# 2
Hello,
thanks for your feedback.
To your question:
Yes I use sax to generate XML from flat.
All you have to do ist to call the event mehtods of the handler object explcidly when needed.
I wont have access to the code as I am out of the office now for a couple of days, but I will do so on Monday.
Matthias
# 3
Presumably you're talking about the serializer. Parsers read XML and produce internal representations of the data, serializers read internal representations and produce XML.
Anyway there's no difference in XML between the two forms of the empty element. Both are equally acceptable and they are equivalent. Compliant XML parsers do not care which form is used.
Is there a particular reason you care about this?
# 4
> Yes I use sax to generate XML from flat.
> All you have to do ist to call the event mehtods of
> the handler object explcidly when needed.
Interesting. I guess you [url=http://www.javazoom.net/services/newsletter/xmlgeneration.html]can use SAX[/url] plus a JAXP Transformer to generate XML. Ya learn something new every day. :)
To your original question; looking at the [url=http://java.sun.com/j2se/1.5.0/docs/api/javax/xml/transform/OutputKeys.html]javax.xml.transform.OutputKeys[/url] API, I don't see any configuration parameter that will allow you to do this. Perhaps your underlying SAX parser supports this, but it doesn't appear to be part of the JAXP spec.
If your parser can't do this kind of output, you could always post-process the xml you generated with some regular expression to clean up empty elements.
So why is it necessary to have elements output in this format? The long format is still valid xml, albiet, less pretty.
