Access to the java schema object : SchemaGrammar ????

[Jean-Guillaume LALANNE]

Hi,

 

I'd like to know if it is possible to get access to the java schema representation

(Schema Grammar object) by using the xerces parsers (SAX or DOM).

I actually want to use this java object for dynamically creating code, gui and other

stuff...

I don' t like to parse my schema file, and to traverse my schema DOM if already,

it exits a java representation of it...!!

I have tried with the following code to access the SchemaGrammar but I failed ...

 

 

the main of my testing class:

 

WHIPSAXParser parser = new WHIPSAXParser();
    XMLValidator validator = parser.getValidator();
    GrammarResolver gr = new GrammarResolverImpl();
    validator.setGrammarResolver(gr);
    try
    {
        validator.setSchemaValidationEnabled( true );
        validator.setDynamicValidationEnabled( true );
        validator.setNamespacesEnabled( true );
        validator.setValidationEnabled( true );
    }
    catch( Exception e )
    {
      e.printStackTrace();
    }

 

    InputSource source = ...
    try
    {
        parser.setFeature("http://xml.org/sax/features/validation", true);
        parser.setFeature("http://xml.org/sax/features/namespaces", true);
        parser.setFeature("http://apache.org/xml/features/validation/schema", true);
        parser.setFeature("http://apache.org/xml/features/dom/defer-node-expansion", false);
        parser.parse( source );
    }
    catch (SAXNotRecognizedException snre)
    {
        snre.printStackTrace();
    }
    catch (SAXNotSupportedException snse)
    {
        snse.printStackTrace();
    }
    catch( IOException ioe )
    {
        ioe.printStackTrace();
    }
    catch( SAXException saxe )
    {
        saxe.printStackTrace();
    }

 

    String nsKey = null;
    Enumeration enum = gr.nameSpaceKeys();
    while( enum.hasMoreElements() )
    {
        nsKey = (String) enum.nextElement();
        System.out.println( "name space key : " + nsKey );
    }

 

 

 

And my parser wrapper class:

 

 

public class WHIPSAXParser extends SAXParser
 {
   public XMLValidator getValidator()
   {
       return fValidator;
   }
 }

 

 

 

I don't get anything from my XML files ... no namespaces ...

Where am I wrong ?

 

If someone knows how to get the schema grammar object, I very very interested  ...!!!

 

Many thanks

Jean-Guillaume LALANNE

 

ps: another quick question : how to validate a DOM object against a schema (stream) ???

 

 

----- Original Message -----

From: "Umesh Subramanian" <[EMAIL PROTECTED]>

To: <[EMAIL PROTECTED]>

Sent: Thursday, March 15, 2001 3:45 PM

Subject: schema validator caching

> Hi:
> Is it possible (or planned in future releases of xerces) to cache the
> schema validator objects, once the schema is loaded? In my application,
> I expect to validate XML instances of the same schema many times over
> and would like to reduce the overhead of reading the schema file
> everytime.
> Thanks
> -Umesh
>
>
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