XOM API for Processing XML with Java

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

> Hallo, I am building a library to be used with JSP and Servlets. The 
> problem seems to be
> with the XOM/Xerces. The msg is:
>
> javax.servlet.ServletException: Cannot inherit from final class
>         at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:249)

Looking at the exception message, I doubt this has anything to do 
with XOM. That's not a class XOM uses or knows about. It may have 
something to do with which classes are loaded form where in the 
CLASSPATH. Servlet environments are tricky that way, and can have 
problems if you're trying to load the same or inherited classes with 
different classloaders.
--

+-----------------------+------------------------+-------------------+
| 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/    |
+----------------------------------+---------------------------------+
> From elharo AT metalab.unc.edu  Sun Apr  6 21:05:36 2003
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Date: Sun, 6 Apr 2003 18:01:57 -0500
To: Laurent Bihanic <laurent.bihanic AT atosorigin.com>,
        XOM-interest <XOM-interest AT lists.ibiblio.org>
From: Elliotte Rusty Harold <elharo AT metalab.unc.edu>
Subject: Re: [XOM-interest] XPath support for XOM
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At 4:16 PM +0100 1/30/03, Laurent Bihanic wrote:
> [Same mail but with the source code attached!]
>
> Hi,
>
> Attached are 2 classes that add XPath support to XOM using the Jaxen path
> engine (1.0 FCS). I ran quick tests including tests on XPath functions and
> namespace support and so far everything seems OK.
>
> I put these classes in a package nu.xom.xpath.jaxen thinking XOM should wrap
> them into an engine-independent XPath class, the way JDOM does. Opinions?

> public class XOMXPath extends BaseXPath
> public class DocumentNavigator extends DefaultNavigator {

Will these work if the classes are non-public? I'd like to hide the 
implementation and keep the JavaDocs as small as possible. I'm 
thinking just a single query method in the Node interface which might 
be backed by Jaxen but not directly expose it.
--

+-----------------------+------------------------+-------------------+
| 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: Mon, 7 Apr 2003 11:53:15 -0400
To: luca passani <passani AT eunet.no>,
        xom <xom-interest AT lists.ibiblio.org>
From: Elliotte Rusty Harold <elharo AT metalab.unc.edu>
Subject: Re: [XOM-interest] loop in loop? xpath?
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At 9:12 PM +0100 3/29/03, luca passani wrote:
> Assuming I have a bit of  XML like the following, what's the best 
> (most efficient) way
> to retrieve the list of capability names and stick them into an ArrayList?
>
> I already have:
>
> Element genericElement = (Element)deviceElementsList.get("generic");
>
> I can only think of nested loops, but maybe there is some XOM 
> shorthand notation?
> What about XPATH?

XPath will eventually be added, but not today. (Today I'm fixing 
bugs. :-) ) You can use nested loops or you can use recursive 
descent, which ever seems more natural to you.

> <device id="generic">
>  <group id="ui">
>     <capability name="proportional_font" value="false"/>
>     <capability name="built_in_back_button_support" value="false"/>
>  </group>
>  <group id="cache">
>    <capability name="total_cache_disable_support" value="false"/>
>    <capability name="time_to_live_support" value="false"/>
>  </group>
> </device>
--

+-----------------------+------------------------+-------------------+
| 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/    |
+----------------------------------+---------------------------------+
> From Nils_Kilden-Pedersen AT Countrywide.Com  Mon Apr  7 14:01:25 2003
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Subject: [XOM-interest] Easy schema validation
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Is there an easy way to validate an XML document (with no schema 
reference) against a schema, in XOM?

Thanks,
Nils