DOMRecursive.C

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/// \file
/// \ingroup tutorial_xml
/// \notebook -nodraw
/// ROOT implementation of a XML DOM Parser
///
/// This is an example of how Dom Parser walks the DOM tree recursively.
/// This example will parse any xml file.
///
/// To run this program
/// ~~~{.cpp}
/// .x DOMRecursive.C+
/// ~~~
///
/// Requires: `person.xml`
///
/// \macro_output
/// \macro_code
///
/// \author Sergey Linev

#include <Riostream.h>
#include <TDOMParser.h>
#include <TXMLNode.h>
#include <TXMLAttr.h>
#include <TList.h>


void ParseContext(TXMLNode *node)
{
   for ( ; node; node = node->GetNextNode()) {
      if (node->GetNodeType() == TXMLNode::kXMLElementNode) { // Element Node
         cout << node->GetNodeName() << ": ";
         if (node->HasAttributes()) {
            TList* attrList = node->GetAttributes();
            TIter next(attrList);
            TXMLAttr *attr;
            while ((attr =(TXMLAttr*)next())) {
               cout << attr->GetName() << ":" << attr->GetValue();
            }
         }
     }
     if (node->GetNodeType() == TXMLNode::kXMLTextNode) { // Text node
        cout << node->GetContent();
     }
     if (node->GetNodeType() == TXMLNode::kXMLCommentNode) { //Comment node
        cout << "Comment: " << node->GetContent();
     }

     ParseContext(node->GetChildren());
   }
}


void DOMRecursive()
{
  TDOMParser *domParser = new TDOMParser();
  TString dir = gROOT->GetTutorialsDir();
  domParser->SetValidate(false); // do not validate with DTD
  domParser->ParseFile(dir+"/xml/person.xml");

  TXMLNode *node = domParser->GetXMLDocument()->GetRootNode();

  ParseContext(node);
}