XOM API for Processing XML with Java

["Galip Aydin" <gaydin AT grids.ucs.indiana.edu>]

Wolfgang,
I was able to compile and run the prototype code, however when I try to 
convert the generated bnux documents back to XML I am getting following 
error, any ideas?

nux.xom.binary.BinaryParsingException: NCNames cannot start with the 
character a
at nux.xom.binary.BinaryXMLCodec.deserialize(BinaryXMLCodec.java:627)
at nux.xom.binary.BinaryXMLCodec.deserialize(BinaryXMLCodec.java:535)
at nux.xom.binary.TestNux.bnux2xml(TestNux.java:46)
at nux.xom.binary.TestNux.main(TestNux.java:60


Here is methods I use:

 public void xml2bnux(InputStream in, OutputStream out) throws Exception {
     //XMLStreamReader reader = StaxUtil.createXMLStreamReader(in, "");
     XMLStreamWriter writer = new 
BinaryXMLCodec().createXMLStreamWriter(out,0);
     XMLInputFactory inputFactory = XMLInputFactory.newInstance();
     XMLStreamReader reader = inputFactory.createXMLStreamReader(in);
     new XMLStreamCopier(reader, writer).copy(false); // performs 
streaming conversion
     reader.close();
     writer.close();
 }

 public void bnux2xml (byte[] bytes)throws Exception{
     BinaryXMLCodec bnuxCodec = new BinaryXMLCodec();
     Document d = bnuxCodec.deserialize(bytes);
     System.out.println(d.toXML());
 }

Thanks,
Galip.

----- Original Message ----- 
From: "Wolfgang Hoschek" <wolfgang.hoschek AT mac.com>
To: "Galip Aydin" <gaydin AT grids.ucs.indiana.edu>
Cc: <xom-interest AT lists.ibiblio.org>
Sent: Monday, July 24, 2006 12:51 AM
Subject: Re: [XOM-interest] BNUX Question


> Galip,
>
> The prototype source code is at
>
> http://dsd.lbl.gov/nux-download/snapshots/bnuxwriter-0.1.tar.gz
>
> The main class is BinaryXMLStreamWriter, instantiated via
>
> XMLStreamWriter writer = BinaryXMLCodec.createXMLStreamWriter(...)
>
> To compile the files into a nux.jar file, copy the unpacked files  into 
> nux/src/nux/xom/binary/
>
> and run
>
> cd nux; ant jar
>
> (Quite a few Stax features aren't implemented, but those aren't  required 
> for copying via XMLStreamCopier from an XMLStreamReader to  an 
> XMLStreamWriter. Of course, turning this class into production  quality 
> code would take a bit more effort.)
>
> Enjoy,
> Wolfgang.
>
> On Jul 23, 2006, at 12:59 PM, Galip Aydin wrote:
>
> > Wolfgang,
> > First, thank you for taking your time this weekend to do the  profiling.
> >
> > [Let me know if you'd like to experiment with the prototype.]
> >
> > Yes I would like that, please let me know how.
> >
> > [As an aside, some of the larger documents appear to consist of N
> > concatenations of a base document. If that's indeed the case, if
> > would be better to use real data throughout, if available. The reason
> > is that binary tokenization schemes can take advantage of such
> > artificial redundancy in manners that are not representative of real
> > world usage.]
> >
> >
> > That is indeed the case, I just wanted to have certain number of 
> > features per doc, so simply did copy/paste. But I will generate a  new 
> > test set from real data.
> >
> > Galip.