Re: Parsing Using SAX

Hi,

Ive been getting there with this Sax buisness...

Now my handler class is on the way (the problem I had earlier is sorted)

However How do I make comparisons efficently using SAX...I mean when it get
the tag, i need to compare it & find the right variable to assign the
character data too (the data between the tags)

Cheers
Alex


appleGuy wrote:
> 
> Ok,
> 
> Im going to include my code for this problem.
> I get an error when the parse function is called:
> parser->parse(XMLfile)....Ive got no idea why
> 
> Also this was formed from the SaxCount Code included with the Xerces
> distro.
> 
> Currently I dont see it doing anything. I need to be able to change
> variable & containers in the DocumentHandler Class
> 
> Cheers
> Alex
> 
> 
> bool prjLoad::loadXML_prj(char *prj_filename){
>       //Start XML Xerces Framework
>       try {
>             XMLPlatformUtils::Initialize();
>         }
>         catch (const XMLException& toCatch) {
>             char* message = XMLString::transcode(toCatch.getMessage());
>             cout << "Error during initialization! :\n"
>                  << message << "\n";
>             XMLString::release(&message);
>                       return false;
>         }
> 
>               //Create New Parser (SAX)
>         SAXParser* parser = new SAXParser();
> 
>               //File Input Validation
>         parser->setDoValidation(true);    
>         parser->setDoNamespaces(true);   
> 
>               //Create our SAX handler object and install it on the parser 
> (Doc &
> Error Handler)
>               //Using Project as Handler
>               parser->setDocumentHandler(prj);
>               parser->setErrorHandler(prj);
> 
>               //Load File through Xerces
>               XERCES_STD_QUALIFIER ifstream xmlFileHandle;
>         xmlFileHandle.open(prj_filename);
> 
>               //Load Each Line From File To Array xmlFile
>               bool flag = true;
>               while (flag == true)
>     {
>         char token[1000];
>         //Set array to zeros
>         memset(token,0,sizeof(token));
> 
>               //Sequential Search
>               if(!(xmlFileHandle.eof())){
>                       xmlFileHandle.getline(token, sizeof(token));
> 
>                       //Check If Line Contains Anything
>                       if(!(token))
>                               continue;
>                       else {
>                               //Load into New Derived Variable for 
> overloading & Safety
>                               const char *XMLfile = token;
> 
>                               //Debug
>                               cout << "Parsing: " << XMLfile << endl;
> 
>                               //ERROR WIPE -> NEEDS IMPLIMENTING
> 
>                               try {
>                                       parser->parse(XMLfile);
>                               }
>                               catch(int debug /*Use Exception in class*/){
>                                       cout << "ERROR OCCURED" << endl;
>                               }
> 
>                       }
>                       
>               
>               }
>               //ELSE STATEMENT FOR EOF-> Set Flag to false therefore exiting 
> while
> loop
>               else
>                       flag = false;
> 
> 
>       }
> 
>               return true;
> }
> 
> 
> appleGuy wrote:
>> 
>> Its Ok,
>> 
>> I needed to inheirt from the handlerbase class
>> 
>> 
>> Cheers
>> ALEX
>> 
>> 
>> 
>> appleGuy wrote:
>>> 
>>> Hi,
>>> 
>>> Ive finally started to get going using Sax. Now im using the Samples to
>>> help coding my own project.
>>> 
>>> Looking at Sax Count, they seem to have created their own handler class
>>> (saxcounthandler):
>>> 
>>> SAXCountHandlers handler;
>>>     parser->setDocumentHandler(&handler);
>>>     parser->setErrorHandler(&handler);
>>> 
>>> How can they do this as The type needed in setDocumentHandler needs to
>>> be type DocumentHandler.
>>> 
>>> When I try to use my custom class as a handler, it gives an error...what
>>> is special about the SaxCountHandlers..?
>>> 
>>> Ive used pointers,. they have dereferenced an object, surely im doing
>>> the same thing?
>>> 
>>> Many Thanks
>>> Alex
>>> 
>>> p.s: Also by DocumentHandler, what does this do exactly. Im thinking its
>>> the controller for the parsing. I.e you can use the parsed data to
>>> modify the handler and visa-versa
>>> 
>>> 
>>> 
>>> 
>>> 
>> 
>> 
> 
> 

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