Re: Passive caching of grammars

[K. Venugopal]

Hi Isamail,


Ismail Nalwala wrote:

Venu,
When I attempt to parse the an instance document of an uncached grammar
using the SAXParser, I am unable to pick up fixed optional attributes using
passive caching.

I am able to do that .Not sure what is going wrong on your side. Please post your xml and xsd files.
Regards.
venu

 However, when I actively preparse the grammar, I am able
to pick up the optional attributes that are resident in my schema(xsd)
files. Besides the parsing takes place significantly faster, telling me
that the schemas are not being referenced.

To preparse the grammar I was the code from the XMLGrammarBuilder sample.
The sample uses the XMLGrammarPreparser class as follows..

thanks in advance,
Ismail


 XMLGrammarPreparser preparser = new XMLGrammarPreparser(sym);
preparser.registerPreparser(XMLGrammarDescription.XML_SCHEMA, null);
preparser.setProperty(GRAMMAR_POOL, grammarPool);
preparser.setFeature(NAMESPACES_FEATURE_ID, true);
preparser.setFeature(VALIDATION_FEATURE_ID, false);
preparser.setFeature(SCHEMA_VALIDATION_FEATURE_ID, true);
Grammar g = preparser.preparseGrammar(XMLGrammarDescription.XML_SCHEMA,
stringToXIS(fileName));



                                                                                                                            
                      "K. Venugopal"                                                                                        
                      <[EMAIL PROTECTED]        To:       [EMAIL PROTECTED]                                       
                      com>                     cc:                                                                          
                                               Subject:  Re: Passive caching of grammars                                    
                      07/08/2003 11:09                                                                                      
                      PM                                                                                                    
                      Please respond to                                                                                     
                      xerces-j-user                                                                                         
                                                                                                                            
                                                                                                                            




Hi Ismail ,

What exactly is the problem you are facing , what makes you say that
passive caching is not working ?

Regards,
venu


Ismail Nalwala wrote:

  

Hi,
I am trying to use xni to cache xml schema grammars. The xerces
documentation mentions that active and passive caching of schemas are both
possible, as long as there is an an instance of the XMLGrammarPool object
associated with the parser. The sample code and documentation describes
    

how
  

to preparse schema grammars to acheive active caching and preventing
unwanted grammars from entering the grammar pool. However I am unable to
get passive caching to work. I do not want to pre-detrmine all the
    

grammars
  

that I may need, however I still want to maintain a cache of all the
grammars that are needed by my application.
I have tried doing the following with no luck. Any thoughts or guidance
will be greatly appreciated.

thanks
Ismail.

  SymbolTable sym = new SymbolTable(BIG_PRIME);

   XMLGrammarPoolImpl grammarPool = new XMLGrammarPoolImpl();
   grammarPool.unlockPool();
   XMLGrammarCachingConfiguration parserConfiguration = new
XMLGrammarCachingConfiguration (sym, grammarPool);
   parserConfiguration.unlockGrammarPool();
   parserConfiguration.setFeature(NAMESPACES_FEATURE_ID, true);
   parserConfiguration.setFeature(VALIDATION_FEATURE_ID, false);
   parserConfiguration.setFeature(SCHEMA_VALIDATION_FEATURE_ID, true);
   parserConfiguration.setProperty(GRAMMAR_POOL,grammarPool);

   XMLReader reader = new SAXParser(parserConfiguration);


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