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Re: [Classpathx-xml] xmlwriter and xmlfilter

From: Nic Ferrier
Subject: Re: [Classpathx-xml] xmlwriter and xmlfilter
Date: 24 Jan 2003 22:49:53 +0000

Luca Dall'Olio <address@hidden> writes:

> I am on thesis on archiving *huge* quantities of xml-signed data.
> Among other things I have to write a single xml file more than 4 Gb size
> (1 dvd) so I decided to use Sax.
> Since the Xerces default content handler does not have a flush() method
> (it keeps everything in memory until the endDocument() method call), I
> changed to Dom4j XmlWriter and then I changed again to Gnu Jaxp
> XmlWriter, because Dom4j does not produce canonalized output.
> Now I would like to send the canonalized sax events to a digester in
> order to produce the document hash and then prettyprint the sax events
> into an outputstream (the final file).
> First question:
> Do you think that I chose the right approach?

Broadly, yes.

> Second one:
> How can I send the XmlWriter events through an XmlFilter (I would prefer
> not to use the Gnu Jaxp pipeline package: I would like to write
> implementation independent code as far as possible), since XmlWriter
> does not implement the XmlReader interface? Should I extend the
> XmlWriter to do implement it?

Why can't you filter the events before they get to the XmlWriter?
using an ordinary SAX chain?


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