Hello all.
I'm trying to convert from DOM parsing to SAX parsing. The basic code I'm using
is:
DocumentBuilderFactory factory = new
org.apache.xerces.jaxp.DocumentBuilderFactoryImpl();
factory.setValidating(validate);
factory.setNamespaceAware(true);
factory.setAttribute("http://xml.org/sax/features/validation";,
validate);
factory.setAttribute("http://apache.org/xml/features/validation/schema";,
validate);
DocumentBuilder builder = factory.newDocumentBuilder();
Document document = builder.parse(inputStream);
for DOM parsing, and
SAXParserFactory spf = new org.apache.xerces.jaxp.SAXParserFactoryImpl();
spf.setValidating(validate);
spf.setNamespaceAware(true);
spf.setFeature("http://apache.org/xml/features/validation/schema";,
validating);
SAXParser parser = spf.newSAXParser();
parser.parse(inputStream, handler);
for SAX parsing.
Using the same source XML file (that references an XSD, and is about 68 KB),
the SAX parsing runs 10 times slower than the DOM parsing. If I disable the
schema validation, the SAX parsing runs faster than the DOM parsing - but the
objects that are created are missing default attributes specified in the XSD.
(By the way, the same Java objects are created in both scenarios - they have
two constructors: one for DOM and one for SAX.)
Ideally, I would like to configure the SAX parser to just use the XSD to supply
default attribute values, and not use it for validation.
I've Googled and searched the Xerces website for an answer, but I didn't find
one. I need the SAX parsing to run as fast or faster than the DOM parsing with
validation turned on.
Can anyone help me?
-Adrian
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