xmlreadfile.C File Reference

Detailed Description

Example to read and parse any xml file, supported by TXMLEngine class The input file, produced by xmlnewfile.C macro is used If you need full xml syntax support, use TXMLParser instead

Processing /mnt/build/workspace/root-makedoc-v610/rootspi/rdoc/src/v6-10-00-patches/tutorials/xml/xmlreadfile.C...

#include "TXMLEngine.h"

void DisplayNode(TXMLEngine* xml, XMLNodePointer_t node, Int_t level);

void xmlreadfile(const char* filename = "example.xml")
{
   // First create engine
   TXMLEngine* xml = new TXMLEngine;

   // Now try to parse xml file
   // Only file with restricted xml syntax are supported
   XMLDocPointer_t xmldoc = xml->ParseFile(filename);
   if (xmldoc==0) {
      delete xml;
      return;
   }

   // take access to main node
   XMLNodePointer_t mainnode = xml->DocGetRootElement(xmldoc);

   // display recursively all nodes and subnodes
   DisplayNode(xml, mainnode, 1);

   // Release memory before exit
   xml->FreeDoc(xmldoc);
   delete xml;
}

void DisplayNode(TXMLEngine* xml, XMLNodePointer_t node, Int_t level)
{
   // this function display all accessible information about xml node and its children

   printf("%*c node: %s\n",level,' ', xml->GetNodeName(node));

   // display namespace
   XMLNsPointer_t ns = xml->GetNS(node);
   if (ns!=0)
      printf("%*c namespace: %s refer: %s\n",level+2,' ', xml->GetNSName(ns), xml->GetNSReference(ns));

   // display attributes
   XMLAttrPointer_t attr = xml->GetFirstAttr(node);
   while (attr!=0) {
       printf("%*c attr: %s value: %s\n",level+2,' ', xml->GetAttrName(attr), xml->GetAttrValue(attr));
       attr = xml->GetNextAttr(attr);
   }

   // display content (if exists)
   const char* content = xml->GetNodeContent(node);
   if (content!=0)
      printf("%*c cont: %s\n",level+2,' ', content);

   // display all child nodes
   XMLNodePointer_t child = xml->GetChild(node);
   while (child!=0) {
      DisplayNode(xml, child, level+2);
      child = xml->GetNext(child);
   }
}

Author

Sergey Linev

Definition in file xmlreadfile.C.