rapidxml - how do I create an array of xml_document(s)?

Question

I have multiple documents to parse and I need access to all the document objects for the lifetime of the creating class. How do I create an array of xml_document pointers as a member variable?

I've tried creating a single member variable as follows:

private: rapidxml::xml_document<> *m_pDoc; // doesn't compile

error: name followed by "::" must be a class or namespace name

I'm sure this is because the template class isn't well defined but I'm not sure how to properly define the pointer.

Answer 1

That compiles fine for me. The error message implies you've forgotten this, maybe?

#include "rapidxml.hpp"

Answer 2

Rapidxml references to the pointers of your vector buffer every time you pass an xml. So store both your buffers and also the xml_document<> docs.

Put the filepaths of your xml docs

char *XMLFilePaths[numXmlDocs] = {"../PersonDatasetA/xmlFile.xml","../PersonDatasetB/xmlFile.xml"};

Store both the buffers and also the xml documents into arrays

std::array<vector<char>,numXmlDocs> XMLDocBuffers;
std::array<xml_document<>,numXmlDocs> XMLDocs;

//For each xml doc, read and store it in an array
for(int i=0;i<numXmlDocs;i++){      
    //Parse each xml into the buffer array
    char xmlFileName[100] ;
    sprintf(xmlFileName,"%s",XMLFilePaths[i]);
    ifstream theFile (xmlFileName);
    vector<char> buffer((istreambuf_iterator<char>(theFile)), istreambuf_iterator<char>());
    buffer.push_back('\0'); 

    //Store the buffer
    XMLDocBuffers[i] =  buffer; 

    // Parse the buffer usingthe xml file parsing library into doc 
    XMLDocs[i].parse<0>(&(XMLDataset_StringDocs[i][0]));

    xml_node<> *root_node;      // Find the root node
    root_node = (XMLDocs[i]).first_node(typesOfSamples);