Re: How to parse using DOM

Alberto Massari Thu, 29 Nov 2007 09:27:49 -0800

Javier,
these errors are strictly MSVC, Xerces is not involved.

Is your "content" class declared in a separate DLL? In this case thispage could be right:http://msdn2.microsoft.com/en-us/library/ms235590(vs.80).aspxYou should specify __cdecl in the class declaration, as the /clr switchautomatically assumes __clrcall.


Alberto

PS: BTW, does you "contents" class have a copy constructor?

Javier Gálvez Guerrero wrote:

The two constructors are declared in content.h:

content(void);
content(string ident);

and defined in content.cpp:

content::content(void){
}

content::content(string ident){
    id = ident;
}

Then, in contents_manager.cpp:

content contents_manager::get_content(string id){
    content c;

    for(int i=0;  i<size; i++){
        c = contents_list.at(i); // contents_list is a vector<content>
        if(c.id == id)
            return c;
    }
    return NULL;
}

The only thing I think can cause this is the line in red, according to what
is said here
<http://msdn2.microsoft.com/en-us/library/c6kkh778%28VS.80%29.aspx>vector.at(i)
returns a reference so, why can't I do this? Compiling there is no error...

I don't know if what is happening has anything to do with Xerces or is only
because my C++ programing "knowledge"...sorry.

2007/11/29, Alberto Massari <[EMAIL PROTECTED]>:

Javier Gálvez Guerrero wrote:

I have just created my main method. I am creating the "parser" class in

my

project, so this is not the final project yet. I create a class and test

it

with a corresponding main when I have compiled without errors (well,

with

the only one that there is no main). Now there are 8 errors (with the

main

defined).

See the quoted text, please.

2007/11/29, Alberto Massari <[EMAIL PROTECTED]>:

[...]

Ventana Resultados

Vinculando...
contents_manager.obj : warning LNK4248: símbolo (token) de typeref sin
resolver (01000019) para 'xercesc_2_8.XMLValidator'; no se puede
ejecutar la imagen
contents_manager.obj : warning LNK4248: símbolo (token) de typeref sin
resolver (0100001A) para 'xercesc_2_8.XMLGrammarPool'; no se puede
ejecutar la imagen

I guess you meant writing xercesc_2_8::XMLGrammarPool (i.e. "::"

instead

of ".")

I have only copied what the Visual C++ 2005 has given as an output when
compiling the project. It appears xercesc_2.8.XMLGrammarPool, dot and

not a

colon. Actually, I have not used this on my project. I've only created a
parser and worked with the DOMNode API:

In this case it could be caused by the various "using namespace"
directives, that under /clr have a different separator. I think the only
way you have to fix this is by removing the XERCES_CPP_NAMESPACE_USE and
add a XERCES_CPP_NAMESPACE_QUALIFIER before any Xerces class (like in
XERCES_CPP_NAMESPACE_QUALIFIER XMLPlatformUtils::Initialize(); )

// contents_manager.cpp

#include "../include/gincludes.h"
#include "contents_manager.h"

//...

void contents_manager::load_guide(string xml_path){

    XMLPlatformUtils::Initialize();
    XercesDOMParser* parser = new XercesDOMParser();

    parser->parse(xml_path.c_str());
    DOMNode* root = parser->getDocument();
    DOMNode* child_aux1, *child_aux2, *child_aux3, *child_aux4,

*child_aux5,

*child_aux6, *child_aux7;

    // Check that the XML file defines the content guide
    if(XMLString::transcode(root->getNodeName()) == "contents"){

Beware, this test is wrong; transcode returns a pointer, so you are
comparing two pointers, and not two strings. Either use strcmp, or
XMLString::equals, or build two std::string objects. And don't forget to
call XMLString::release on the pointer returned by transcode, or you'll
leak memory.

        for(child_aux1 = root->getFirstChild(); child_aux1 != NULL;
child_aux1 = child_aux1->getNextSibling()){
            char* child1_name =
XMLString::transcode(child_aux1->getNodeName());
//...

    delete parser;

    XMLPlatformUtils::Terminate();
}

That is the only I have done in my class regarding Xerces. In the header
file I have included these:


//contents_manager.h

#include "../include/gincludes.h"
#include "../content/content.h"
#include <xercesc/dom/DOM.hpp>
#include <xercesc/dom/DOMImplementation.hpp>
#include <xercesc/dom/DOMImplementationLS.hpp>
#include <xercesc/dom/DOMWriter.hpp>
#include <xercesc/util/PlatformUtils.hpp>
#include <xercesc/parsers/XercesDOMParser.hpp>
#include <xercesc/dom/DOM.hpp>
#include <xercesc/sax/HandlerBase.hpp>
#include <xercesc/util/XMLString.hpp>
#include <xercesc/util/PlatformUtils.hpp>

using namespace System;
using namespace System::Runtime::InteropServices;
using namespace std;

XERCES_CPP_NAMESPACE_USE

class contents_manager {
//...


So that's all.

Sorry, I extracted the wrong symbol from the spanish description: it
complains that contents_manager::get_content is using two constructors
for the "content" class that cannot be
found,content::content(std::string) and content::content(void). Double
check if you have implemented them, or just declared in the header file.

Alberto

Re: How to parse using DOM

Reply via email to