XOM API for Processing XML with Java

[Elliotte Rusty Harold <elharo AT metalab.unc.edu>]

At 4:48 PM +0100 3/27/03, luca passani wrote:
> Anyone who knows what this means?
>
> the XML file is the one at:
> http://wurfl.sourceforge.net/wurfl.xml
>
> thank you
>
> luca
>
>
> nu.xom.MalformedURIException: URIs cannot contain 0x25
>         at nu.xom.Verifier.checkURI(Verifier.java:201)
>         at nu.xom.Node.setActualBaseURI(Node.java:169)
>         at nu.xom.Document.setBaseURI(Document.java:259)

Looking at this again, I don't think this is a namespace issue. The 
problem is in the base URI, which the document does have; not a 
namespace URI which it doesn't. That said, I still can't reproduce 
this, even loading it from the web site.

Hypothesis: you were loading it from a local copy and using a URI 
which Java accepted, but XOM did not. How exactly was this document 
loaded into your program? What URI did you use to do that?
--

+-----------------------+------------------------+-------------------+
| Elliotte Rusty Harold | elharo AT metalab.unc.edu | Writer/Programmer |
+-----------------------+------------------------+-------------------+
|           Processing XML with Java (Addison-Wesley, 2002)          |
|              http://www.cafeconleche.org/books/xmljava             |
| http://www.amazon.com/exec/obidos/ISBN%3D0201771861/cafeaulaitA  |
+----------------------------------+---------------------------------+
|  Read Cafe au Lait for Java News:  http://www.cafeaulait.org/      |
|  Read Cafe con Leche for XML News: http://www.cafeconleche.org/    |
+----------------------------------+---------------------------------+
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Date: Sun, 30 Mar 2003 12:01:20 -0500
To: luca passani <passani AT eunet.no>
From: Elliotte Rusty Harold <elharo AT metalab.unc.edu>
Subject: Re: [XOM-interest] 0x25?
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At 12:35 PM +0200 3/30/03, luca passani wrote:
> Could it be "./wurfl.xml" as opposed to simply "wurfl.xml"?

That should work. The period character is legal in URIs. However, the 
problem may be that this is a relative URI. Generally base URIs are 
absolute. In fact. RFC 2396 states:

  The term "relative URI" implies that there exists some absolute "base
   URI" against which the relative reference is applied.  Indeed, the
   base URI is necessary to define the semantics of any relative URI
   reference; without it, a relative reference is meaningless.  In order
   for relative URI to be usable within a document, the base URI of that
   document must be known to the parser.

That seems to be normative so I'm probably checking that the base URI 
is absolute, and that's why the exception is being thrown. However, 
if this is the case then the error message is misleading and should 
be fixed. Looking at the code, though, I don't seem to be checking 
that the base URI is an absolute URI though perhaps I should be.

It's also possible that some other code is mucking up the conversion 
from the relative URL to the absolute URL, and thus causing the 
problem. It's hard to tell without a simple, reproducible test-case 
(hint, hint:-)

> Also, I am moving my first steps with the eclipse IDE and I cannot guarantee
> that the problem is not there.

Possible. Eclipse can be flaky in some environments, including 
problems with relative file URLs.
--

+-----------------------+------------------------+-------------------+
| Elliotte Rusty Harold | elharo AT metalab.unc.edu | Writer/Programmer |
+-----------------------+------------------------+-------------------+
|           Processing XML with Java (Addison-Wesley, 2002)          |
|              http://www.cafeconleche.org/books/xmljava             |
| http://www.amazon.com/exec/obidos/ISBN%3D0201771861/cafeaulaitA  |
+----------------------------------+---------------------------------+
|  Read Cafe au Lait for Java News:  http://www.cafeaulait.org/      |
|  Read Cafe con Leche for XML News: http://www.cafeconleche.org/    |
+----------------------------------+---------------------------------+
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"Elliotte Rusty Harold" <elharo AT metalab.unc.edu>
03/29/2003 11:20 AM


       To:     Nils_Kilden-Pedersen AT Countrywide.Com, 
xom-interest AT lists.ibiblio.org
       cc: 
       Subject:        Re: [XOM-interest] 0x25?


> I'll bring this up over on sax-devel, but I suspect the Sun parser is 
> buggy. Which parser are you using. Crimson?

Xerces 2.4.0