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Posted to c-dev@xerces.apache.org by Gröndal Daniel <da...@rfv.sfa.se> on 2004/03/16 11:15:00 UTC
SV:Re: SV:HandlerBase problem with SAXXMLREADER
reader
Hi!
Well, that's more or less exactly what I want to do as well. Since I use
SAX2XMLReader my handlerclass inherits from DefaultHandler. DefaultHandler is
used with the SAX2-api and HandlerBase is used with SAX as far as I know from
the docs. Anyway, they both provide an empty implementation for handlers.
My handler class looks something like this:
class TestAppHandler : public DefaultHandler
{
public:
TestAppHandler ();
virtual ~TestAppHandler();
//
// SAX-functions (three over loaded functions. The others are empty
(implemented in DefaultHandler))
//
void startElement(const XMLCh* const uri,
const XMLCh* const localname,
const XMLCh* const qname,
const Attributes& attributes);
void endElement(const XMLCh* const uri,
const XMLCh* const localname,
const XMLCh* const qname);
void characters(const XMLCh *const chars, const unsigned int length);
private:
const XMLCh* functionString;
const XMLCh* argString;
};
and the implementation of endElement() looks like:
void TestAppHandler::endElement(const XMLCh* const uri,
const XMLCh* const localname,
const XMLCh* const qname)
{
std::cout << "TestAppHandler::endElement(): " <<
XMLString::transcode(localname) << std::endl;
if (XMLString::equals(localname, functionString)) {
//
// do something (functionsString is defined in constructor)
//
}
if (XMLString::equals(localname, argString)) {
//
// do something else (argString is defined in constructor)
//
}
}
I use to parse a file with function names and arguments and then call the
correct function with the supplied arguments (for automatic regression tests).
The endElement() really works fine. Whenever an </argument> is encountered an
argument is stored and when </function> is encountered the function is called
with all arguments.
What I am trying to say is that endElement() should be available in
DefaultHandler as well. There must be something else that's wrong.
//daniel
David --- (2004-03-16 10:59):
>Hi daniel,
>For instance I'm using xerces_2_4.
>
>You are using DefaultHandler and I'm trying to use
>handlerbase. The reason for that is the following
>method EndElement. It doesn't display anything in my
>case. However start element display properly all the
>elements.
>My idea is only to display some elements, not all of
>the elements that are found in the file that's why i
>want to modify endElement.
>If I use DefaultHandler it runs but still endElement
>is not displayed. Did you try to display the
>endElement like below?
>
>void Xml::endElement(const XMLElementDecl & elemDecl,
>const unsigned int urlId, const bool isRoot, const
>XMLCh *const elemPrefix)
>{
>
> std::cout << "Found end element:" <<
>XMLString::transcode(elemPrefix) << std::endl;
>
>}
>
>
>--- Gröndal_Daniel <da...@rfv.sfa.se> a écrit
>: > Hi!
>>
>> I'm doing roughly the same thing as you are:
>>
>> ----------------------------------------------
>> class TestAppHandler : public DefaultHandler
>> {
>> public:
>> TestAppHandler ();
>> virtual ~TestAppHandler();
>> void startElement(const XMLCh* const uri,
>> const XMLCh* const localname,
>> const XMLCh* const qname,
>> const Attributes& attributes);
>> void endElement(const XMLCh* const uri,
>> const XMLCh* const localname,
>> const XMLCh* const qname);
>> void characters(const XMLCh *const chars, const
>> unsigned int length);
>> -----------------------------------------------
>>
>> I have no problem over loading the function
>> endElement() and then to register
>> an object of type TestAppHandler as a
>> contenthandler.
>>
>> ---------------------------------------------
>> parser = XMLReaderFactory::createXMLReader();
>> TestAppHandler handler;
>> parser->setContentHandler(&handler);
>> --------------------------------------------
>>
>> I use Xerces 2.3.0 if that should matter?
>>
>> //daniel
>>
>>
>>
>> David --- (2004-03-16 00:17):
>> >Hello,
>> >Going through the doc i noticed that EndElement
>> >requires the implementation of a handlerbase.
>> >However when I use a handlerbase in my code in got
>> an
>> >error while using SAX2XMLREADER. It complains that
>> >setContentHandler requires a contenthandler.
>> However
>> >my XMLhandler is a HandlerBase.
>> >If I use DefaultHandler instead of HandleBase in
>> Xml.h
>> >it works but then the endElement method is not
>> >available. Can anybody help??
>> >
>> >Error at execution:
>> >
>> >david@home:XmlXercesFactory>make
>> >g++ Xml.cpp -c -o Xml.o
>> >g++ SaxParser.cpp -c -o SaxParser.o
>> >SaxParser.cpp: In member function `virtual void
>> >SaxParser::ParseFile(char*)':
>> >SaxParser.cpp:58: error: no matching function for
>> call
>> >to `
>> >
>>
>>xercesc_2_4::SAX2XMLReader::setContentHandler(Xml*)'
>>
>>/usr/local/include/xercesc/sax2/SAX2XMLReader.hpp:304:
>> >error: candidates are:
>> > virtual void
>> >
>>
>>xercesc_2_4::SAX2XMLReader::setContentHandler(xercesc_2_4::ContentHandler*)
>> >make: *** [SaxParser.o] Error 1
>> >>
>> >
>> >#FILES#
>> >
>> >#Xml.h
>> >
>> >
>> >class xml : public HandlerBase {
>> >
>> >public:
>> >Xml()
>> >virtual ~Xml()
>> >
>> >###Here all the handler methods
>> >
>> >}
>> >
>> >#
>> >in SaxParser.cpp
>> >void SaxParser::ParseFile(char *xmlFile)
>> >{
>> > std::cout <<"Trying to parse "<< xmlFile <<
>> "..."
>> ><< std::endl;
>> >
>> > Xml handler;
>> >
>> > c_parser->setErrorHandler(&handler);
>> > c_parser->setContentHandler(&handler);
>> >
>> >
>> > try {
>> > c_parser->parse(xmlFile);
>> > }
>> > catch (XMLException &e){
>> > std::cout << "Error parsing file "<<
>> >Error(e.getMessage()) << std::endl;
>> > exit (-1);
>> > }
>> > ....
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >Yahoo! Mail : votre e-mail personnel et gratuit qui
>> vous suit partout !
>> >Créez votre Yahoo! Mail sur
>> http://fr.benefits.yahoo.com/
>> >
>> >Dialoguez en direct avec vos amis grâce à Yahoo!
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>> Messenger sur http://fr.messenger.yahoo.com
>> >
>>
>>---------------------------------------------------------------------
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>> xerces-c-dev-help@xml.apache.org
>> >
>>
>>
>__________________________________________________________
>> RFV Data/Produktenheten E-post:
>> daniel.grondal@rfv.sfa.se
>> Daniel Gröndal Tfn: 060-187126
>> S:a Järnvägsgatan 41 Mobil: 070-3016517
>> 851 93 Sundsvall Fax: 060-147870
>>
>__________________________________________________________
>>
>>
>>
>>
>---------------------------------------------------------------------
>> To unsubscribe, e-mail:
>> xerces-c-dev-unsubscribe@xml.apache.org
>> For additional commands, e-mail:
>> xerces-c-dev-help@xml.apache.org
>>
>
>
>
>
>
>
>Yahoo! Mail : votre e-mail personnel et gratuit qui vous suit partout !
>Créez votre Yahoo! Mail sur http://fr.benefits.yahoo.com/
>
>Dialoguez en direct avec vos amis grâce à Yahoo! Messenger !Téléchargez Yahoo!
Messenger sur http://fr.messenger.yahoo.com
>
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>
__________________________________________________________
RFV Data/Produktenheten E-post: daniel.grondal@rfv.sfa.se
Daniel Gröndal Tfn: 060-187126
S:a Järnvägsgatan 41 Mobil: 070-3016517
851 93 Sundsvall Fax: 060-147870
__________________________________________________________
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Re: SV:Re: SV:HandlerBase problem with SAXXMLREADER reader
Posted by David --- <da...@yahoo.fr>.
Looking at your code I realized that my endElement
method was badly implemented. Now it works like yours
with DefaultHandler.....
thanks ,
david
--- Gröndal_Daniel <da...@rfv.sfa.se> a
écrit : > Hi!
>
> Well, that's more or less exactly what I want to do
> as well. Since I use
> SAX2XMLReader my handlerclass inherits from
> DefaultHandler. DefaultHandler is
> used with the SAX2-api and HandlerBase is used with
> SAX as far as I know from
> the docs. Anyway, they both provide an empty
> implementation for handlers.
>
> My handler class looks something like this:
>
> class TestAppHandler : public DefaultHandler
> {
> public:
> TestAppHandler ();
> virtual ~TestAppHandler();
> //
> // SAX-functions (three over loaded functions. The
> others are empty
> (implemented in DefaultHandler))
> //
> void startElement(const XMLCh* const uri,
> const XMLCh* const localname,
> const XMLCh* const qname,
> const Attributes& attributes);
> void endElement(const XMLCh* const uri,
> const XMLCh* const localname,
> const XMLCh* const qname);
> void characters(const XMLCh *const chars, const
> unsigned int length);
>
> private:
>
> const XMLCh* functionString;
> const XMLCh* argString;
>
> };
>
> and the implementation of endElement() looks like:
>
> void TestAppHandler::endElement(const XMLCh* const
> uri,
> const XMLCh* const localname,
> const XMLCh* const qname)
> {
>
> std::cout << "TestAppHandler::endElement(): " <<
> XMLString::transcode(localname) << std::endl;
>
> if (XMLString::equals(localname, functionString))
> {
> //
> // do something (functionsString is defined in
> constructor)
> //
> }
>
> if (XMLString::equals(localname, argString)) {
> //
> // do something else (argString is defined in
> constructor)
> //
> }
> }
>
> I use to parse a file with function names and
> arguments and then call the
> correct function with the supplied arguments (for
> automatic regression tests).
>
> The endElement() really works fine. Whenever an
> </argument> is encountered an
> argument is stored and when </function> is
> encountered the function is called
> with all arguments.
>
> What I am trying to say is that endElement() should
> be available in
> DefaultHandler as well. There must be something else
> that's wrong.
>
> //daniel
>
>
> David --- (2004-03-16 10:59):
> >Hi daniel,
> >For instance I'm using xerces_2_4.
> >
> >You are using DefaultHandler and I'm trying to use
> >handlerbase. The reason for that is the following
> >method EndElement. It doesn't display anything in
> my
> >case. However start element display properly all
> the
> >elements.
> >My idea is only to display some elements, not all
> of
> >the elements that are found in the file that's why
> i
> >want to modify endElement.
> >If I use DefaultHandler it runs but still
> endElement
> >is not displayed. Did you try to display the
> >endElement like below?
> >
> >void Xml::endElement(const XMLElementDecl &
> elemDecl,
> >const unsigned int urlId, const bool
> isRoot, const
> >XMLCh *const elemPrefix)
> >{
> >
> > std::cout << "Found end element:" <<
> >XMLString::transcode(elemPrefix) << std::endl;
> >
> >}
> >
> >
> >--- Gröndal_Daniel <da...@rfv.sfa.se> a
> écrit
> >: > Hi!
> >>
> >> I'm doing roughly the same thing as you are:
> >>
> >> ----------------------------------------------
> >> class TestAppHandler : public DefaultHandler
> >> {
> >> public:
> >> TestAppHandler ();
> >> virtual ~TestAppHandler();
> >> void startElement(const XMLCh* const uri,
> >> const XMLCh* const localname,
> >> const XMLCh* const qname,
> >> const Attributes& attributes);
> >> void endElement(const XMLCh* const uri,
> >> const XMLCh* const localname,
> >> const XMLCh* const qname);
> >> void characters(const XMLCh *const chars, const
> >> unsigned int length);
> >> -----------------------------------------------
> >>
> >> I have no problem over loading the function
> >> endElement() and then to register
> >> an object of type TestAppHandler as a
> >> contenthandler.
> >>
> >> ---------------------------------------------
> >> parser = XMLReaderFactory::createXMLReader();
> >> TestAppHandler handler;
> >> parser->setContentHandler(&handler);
> >> --------------------------------------------
> >>
> >> I use Xerces 2.3.0 if that should matter?
> >>
> >> //daniel
> >>
> >>
> >>
> >> David --- (2004-03-16 00:17):
> >> >Hello,
> >> >Going through the doc i noticed that EndElement
> >> >requires the implementation of a handlerbase.
> >> >However when I use a handlerbase in my code in
> got
> >> an
> >> >error while using SAX2XMLREADER. It complains
> that
> >> >setContentHandler requires a contenthandler.
> >> However
> >> >my XMLhandler is a HandlerBase.
> >> >If I use DefaultHandler instead of HandleBase in
> >> Xml.h
> >> >it works but then the endElement method is not
> >> >available. Can anybody help??
> >> >
> >> >Error at execution:
> >> >
> >> >david@home:XmlXercesFactory>make
> >> >g++ Xml.cpp -c -o Xml.o
> >> >g++ SaxParser.cpp -c -o SaxParser.o
> >> >SaxParser.cpp: In member function `virtual void
> >> >SaxParser::ParseFile(char*)':
> >> >SaxParser.cpp:58: error: no matching function
> for
> >> call
> >> >to `
> >> >
> >>
>
>>xercesc_2_4::SAX2XMLReader::setContentHandler(Xml*)'
> >>
>
>>/usr/local/include/xercesc/sax2/SAX2XMLReader.hpp:304:
> >> >error: candidates are:
> >> > virtual void
> >> >
> >>
>
>>xercesc_2_4::SAX2XMLReader::setContentHandler(xercesc_2_4::ContentHandler*)
> >> >make: *** [SaxParser.o] Error 1
> >> >>
> >> >
>
=== message truncated ===
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Re: SV:Re: SV:HandlerBase problem with SAXXMLREADER reader
Posted by da...@us.ibm.com.
Daniel,
Can you please turn off requesting a return receipt when you post to this
list!
Thanks!
Dave
|---------+--------------------------->
| | "Gröndal Daniel"|
| | <daniel.grondal@|
| | rfv.sfa.se> |
| | |
| | 03/16/2004 02:15|
| | AM |
| | Please respond |
| | to xerces-c-dev |
|---------+--------------------------->
>-------------------------------------------------------------------------------------------------------------------------------------------------|
| |
| To: xerces-c-dev@xml.apache.org |
| cc: (bcc: David N Bertoni/Cambridge/IBM) |
| Subject: SV:Re: SV:HandlerBase problem with SAXXMLREADER reader |
>-------------------------------------------------------------------------------------------------------------------------------------------------|
Hi!
Well, that's more or less exactly what I want to do as well. Since I use
SAX2XMLReader my handlerclass inherits from DefaultHandler. DefaultHandler
is
used with the SAX2-api and HandlerBase is used with SAX as far as I know
from
the docs. Anyway, they both provide an empty implementation for handlers.
...
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