XOM API for Processing XML with Java

[Arjan Huijzer <huijzer AT gmail.com>]

Thanks for all the valuable answers. I am trying out the different
solutions as we speak. Looking good so far :-)


On Thu, 27 Jan 2005 11:23:01 +0000, Steve Loughran
<steve.loughran AT gmail.com> wrote:
> On Thu, 27 Jan 2005 10:51:31 +0100, Arjan Huijzer <huijzer AT gmail.com> wrote:
> > Hi all,
> >
> > I have been adding a validity check to my XML documents and have a
> > couple of questions:
> >
> > 1. Does XOM support validation against an XML schema? So far, I have
> > only been able to validate againt a DTD
> 
> Turn it on in the parser. This is my option set for validating docs
> incoming from somewhat trusted sources where I dont want to enable a
> couple of security risks (entity expansion, doctype redeclaration)
> 
>             xerces.setFeature(
>                     "http://apache.org/xml/features/validation/schema";,
>                     validate);
>             xerces.setFeature(
> 
> "http://apache.org/xml/features/validation/schema-full-checking";,
>                     validate);
>             xerces.setFeature(
>                     
> "http://apache.org/xml/features/standard-uri-conformant";,
>                     true);
>             xerces.setFeature(
>                     "http://apache.org/xml/features/disallow-doctype-decl";,
>                     true);
>             xerces.setFeature(,
>                     "http://xml.org/sax/features/external-general-entities";,
>                     false);
> 
> I also set up my own catalog, for DTD resolution, and get schema res
> by telling xerces the local location of things like this:-
> 
>      parser.setProperty(
> "http://apache.org/xml/properties/schema/external-schemaLocation";,
>       "http: //domain.com/mynamespace mySchema.xsd");
> 
> > 2. Do I have to include a doctype declaration to my XML document or
> > can I also declare in my java code against which DTD the document
> > should be validated.
> 
> -dont know
> 
> 
> >
> > Furthermore, I noticed some odd behaviour. My code to parse an XML
> > document used to be:
> >
> >     Document doc = parser.build("c:/xomtest/books.xml");
> >
> > This worked fine until I switched to Xerces, which bow trows an
> > IOException. I had to modify my code to read:
> >
> >     Document doc = parser.build("file:///c:/xomtest/books.xml");
> 
> well, that is a proper URI at that point. Maybe xerces is fussy.
> 
> If you use  Builder.build(File)  then everything works.
> 
> I would point you to the LGPL source where I do all this, which is in
> smartfrog CVS on sourceforge (
> http://sourceforge.net/projects/smartfrog ), with the caveat that I
> reserve the right to be incompetent (this was my first use of Xom)
> 
> Look at the files in
> http://cvs.sourceforge.net/viewcvs.py/smartfrog/core/components/cddlm/src/org/smartfrog/services/cddlm/cdl/
> 
> There is something there that may be of broader interest: something to
> extract a XOM document from bits of an incoming Axis SOAP message. Its
> an inefficient process, which shows how badly designed JAXRPC is for
> anyone who wants to work with the XML itself, but it does at least
> give you XML you can use.
> 
> -steve
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