Re: [castor-dev] Validating XML documents and namespaces

[Clive Hughes]

Thanks Erik, however...

I removed the namespace prefix problem using the 
xsi:noNameSpaceSchemaLocation attribute in the XML document e.g.:

<AccCard xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; 
xsi:noNamespaceSchemaLocation="AccCard.xsd">
...
</AccCard>

castor.properties has the following set:

org.exolab.castor.parser.validation=true
org.exolab.castor.parser.namespaces=true
org.exolab.castor.marshalling.validation=true
# Comma separated list of SAX 2 features that should be enabled
# for the default parser.
#
org.exolab.castor.features=http://xml.org/sax/features/validation,http://apache.org/xml/features/validation/schema
Now I get an org.xml.sax.SAXException: Parsing Error : Document is invalid: 
no grammar found.

which suggests it cannot find a DTD or XSD.  However, the SAX 2 features 
have been set telling SAX to use schema validation in the pipeline, right?.  
I am confused.  BTW: I am using Xerces 2.5 which I check using 
org.apache.xerces.impl.Version.

Thanks again for any help
Clive


From: "Ostermueller, Erik" <[EMAIL PROTECTED]>
Reply-To: [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Subject: Re: [castor-dev] Validating XML documents and namespaces
Date: Tue, 2 Sep 2003 08:47:10 -0500


      > -----Original Message-----
      > From: Clive Hughes [mailto:[EMAIL PROTECTED]
      > Sent: Monday, September 01, 2003 11:43 AM
      > To: [EMAIL PROTECTED]
      > Subject: [castor-dev] Validating XML documents and namespaces
      >
      >
      > I am using Castor 0.9.5 and am only interested in
      > unmarshalling at the
      > moment.  I can correctly unmarshal an XML document that
      > is not validated or
      > has no namespace details.
      > However, moving on to validate and to handle
      > namespaces, I run into
      > difficulty.  Sample of the XML below:
      >
      > <?xml version="1.0" encoding="UTF-8"?>
      > <AccCard>
      >   <Header>
      >     <Filename>abc.xml</Filename>
      >     <UserID>fred_bloggs</UserID>
      >   </Header>
      > </AccCard>
      >
      > Firstly assume the submitted document is not validated.
      >  How can I prompt
      > Castor to validate it against, say, AccCard.xsd on my
      > local filesystem.
Look at the castor.properties files.  Here is a snippet:
# True if xml documents should be validated by the SAX Parser
#
org.exolab.castor.parser.validation=false
org.exolab.castor.parser.namespaces=false
If you use .java files generated by the SourceGenerator,
you can use Castor schema validatoin, which is a lot faster than the 
parser's validation.
Use this property from the same file:
# True if all documents should be validated by the marshalling framework
#
org.exolab.castor.marshalling.validation=true

      >
      > Secondly how would I get Castor to handle the case
      > where a user submits this
      > document with namespace information e.g.
Look at the nspackages attribute in the castorbuilder.properties file:
# XML namespace mapping to Java packages
#
#org.exolab.castor.builder.nspackages=\
  http://www.xyz.com/schemas/project=com.xyz.schemas.project,\
  http://www.xyz.com/schemas/person=com.xyz.schemas.person
Again, this is if you use the SourceGenerator.
If you don't, the mapping file can help.


      >
      > <?xml version="1.0" encoding="UTF-8"?>
      > <p:AccCard xmlns:p="urn:nmspace.co.uk"
      > xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
      > xsi:schemaLocation="urn:nmspace.co.uk ChargeCard.xsd ">
      >   <p:Header>
      >     <p:Filename>abc.xml</p:Filename>
      >     <p:UserID>fred_bloggs</p:UserID>
      >   <p:/Header>
      > <p:/AccCard>
      >
      > i.e. how do I handle (ignore) the xmlns attributes and
      > p: namespace
      > prefixes?  My current mapping (which works fine without
      > the p: prefix)
      > doesn't handle this.
      >
      > Any help is appreciated, thanks
      >
      > Clive
      >
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