XML Parsing

[Sindhu Kodoor]

Hi,

I am having a JMS application , where the publisher-subscriber model is used, and the subscriber is notified when a message comes into the queue, the messages picked up is xml files which are of large size. All that comes out of the subscriber program is the xml file name, which is a good parser to parse this xml?

And also if I am getting the structure of the xml as this :

   <projects>
                       <project scheme="http:\\xxx\xyz\abc\one.html">ONE</project>
                       <project scheme="http:\\xxx\xyz\abc\two.html">TWO</project>
                        <project scheme="http:\\xxx\xyz\abc\three.html">THREE</project>
      
  </projects>
            

If I need to pick up the value of project tag with the condition that the scheme should be "http:\\xxx\xyz\abc\one.html" then how would I write the syntax of the XPath?

I tried this :

   

String expression = "//@scheme='http:\\xxx\xyz\abc\one.html'"
 

this does not work .. please help!!

[Paul Clapham]

All of that business about where the data comes from and how you get it is irrelevant to what parser you should use. What is relevant, however, is the part of your post about XPath expressions. If you plan to use XPath expressions then you should use a parser which supports XPath. As far as I know streaming parsers don't.

As for the expression, I'm amazed that somebody should decide to use identifiers which look sort of like HTTP URL's but use backslashes instead of slashes. What's up with that? Anyway your problem is simply that you're creating a Java string which attempts to include backslash characters but doesn't escape them properly. Nothing to do with XML at all. You need this:

String expression = "//@scheme='http:\\\\xxx\\xyz\\abc\\one.html'"

[Prabhakar Reddy Bokka]

You should use SAX parser to parse the xml.
SAX is event based. So, based on the condition you can get the value of the specific event/tag.