XOM API for Processing XML with Java

["Markus Lindner" <marcx AT catbull.com>]

Hello all,

I also encountered OOM-errors using large XML-files (ca. 30 MB), but I
used to set my app like this:

java -Xmx768m -Xms512m -XX:SurvivorRatio=6 -XX:ThreadStackSize=512
-Dfile.encoding="UTF-8" -jar myapp.jar

this way the OOM-error did not rise.
Of course the machine has to have enough RAM to handle this.

cheers,
markus

> Hi All,
>
>
>
> I have downloaded xom-1.1.jar a few weeks ago and getting more and more
> familiar with it. It provides a lot of great features; I ever missed
> when using DOM.
>
>
>
> One of my requirements is to store the content of very large XML files
> in separate files and do some other changes to the XML. Therefore I
> programmed my own NodeFactory and use the Builder to process these
> files.
>
>
>
> If the content is greater than about 50 MB, this fails due to an
> OutOfMemoryError. The reason is that 'makeText(String data)' of the
> underlying NodeFactory provides the content as String, already. This is
> very memory consuming for big contents. To avoid it, I intended to
> handle the problem on SAX level and developed a quick and (sofar) dirty
> solution by overwriting the XOMHandler. The code to use it is this:
>
>
>
> XMLReader    parser =
> XMLReaderFactory.createXMLReader("org.apache.xerces.parsers.SAXParser");
>
>
> Builder     builder = new Builder(parser);
>
> parser.setContentHandler(new MyXOMHandler());
>
> Document     xmlDoc = builder.build(iInputStream);
>
>
>
>
>
> Since 'XOMHandler' is package private, I have had to place
> 'MyXOMHandler' in the package 'nu.xom', either. Even worse, 'Sealed:
> true' must be set for the package in the Manifest file of xom-1.1.jar to
> get it running. As you can see - quick but dirty.
>
>
>
> So I would like to ask, if 'XOMHandler' could be a public class in
> future Versions of XOM or any body out there has a better solution for
> the problem.
>
>
>
> Thanks and best regards,
>
>
>
> Martin
>
>
>
> --
>
> Martin Gsell
>
> Actinium Consulting GmbH
>
> Dammsteggasse 2
>
> D-88131 Lindau
>
>
>
> Bei InnoSysTec:
>
> Tel:   +49 (0)7553 9180-331
>
> Fax:   +49 (0)7553 9180-349
>
> mailto:martin.gsell AT InnoSysTec.de <mailto:martin.gsell AT InnoSysTec.de>
>
>
>
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