I got the solution resolved.....i am parsing over 11,000 different
file types...it is going slow using the DOM Xml Parser...any ideas on
how to improve performance?
I cannot think of any other way to parse it
On Oct 14, 10:40 am, Jeffrey Chimene <jchim...@gmail.com> wrote:
> On 10/14/2011 7:00 AM, coffeMan wrote:
>
> > I am retrieving XML from a servlet and parsing through it. the xml
> > code is one large XML file but on through the servlet. I can parse
> > through it easy and get my results but i am not sure when to stop it.
> > I keep getting NullPointerException that kicks off when it reaches the
> > end. I never know when its going to end because every file that i
> > parse through is different in length.
>
> > I am using the DOM parser. Document messageDom =
> > XMLParser.parse(srv.getXmlObject());
>
> > string name =
> > messageDom.getElementsByTagName("name").item(n).getFirstChild().getNodeValu
> > e();
> > - n being a variable that is an integer value that increases after
> > each loop
>
> A couple of questions come to mind:
>
> 1) Are you sure the document is valid? Does there exist an XML schema
> against which you can test this document instance? If not, you might
> consider creating an XML schema, a sample document, and running the pair
> through a validating parser such as xmllint. Such validation tests can
> be a useful part of your overall product verification/validation regime.
>
> 2) Have you considered using GQuery to produce nodelists? For complex,
> valid documents it can be a useful tool.
>
> 3) Consider using loops controlled by NodeList.length() instead of using
> the builder pattern to process the tree. In my experience, using loops
> instead of the builder pattern yields fewer surprises at runtime. I
> realize there's a "cool factor" to chaining those method calls, but it
> usually results in issues such as the one you're now trying to resolve.
>
> Bueno Suerte,
> jec
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