/afs/cern.ch/work/a/aaltunda/public/www/CMSSW_6_2_7/src/RecoBTag/XMLCalibration/src/CalibrationXML.cc

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#include "RecoBTag/XMLCalibration/interface/CalibrationXML.h"

#include "FWCore/MessageLogger/interface/MessageLogger.h"

#include <xercesc/framework/LocalFileFormatTarget.hpp>
#include <xercesc/parsers/XercesDOMParser.hpp>
#include <xercesc/dom/DOM.hpp>
#include <xercesc/dom/DOMWriter.hpp>
#include <xercesc/sax/HandlerBase.hpp>
#include <xercesc/util/XMLString.hpp>
#include <xercesc/util/PlatformUtils.hpp>
#include <iostream>
#include <fstream>
#include <string>

using namespace std;


XERCES_CPP_NAMESPACE_USE

CalibrationXML::CalibrationXML() : errHandler(0), parser(0)
{

}

CalibrationXML::~CalibrationXML()
{
//TODO: delete!!!!      
if(errHandler) delete errHandler;
if(parser)  { 
              delete parser;
              XMLPlatformUtils::Terminate();
            }
}

void CalibrationXML::openFile(const std::string & xmlFileName) 
{
if(errHandler) delete errHandler;
if(parser) { delete parser; XMLPlatformUtils::Terminate(); }

 m_xmlFileName = xmlFileName;
// std::cout << "Opening.." << std::endl;
        // Initialize the XML4C2 system
        try
        {
                XMLPlatformUtils::Initialize();
        }
        catch(const XMLException& toCatch)
        {
                std::cerr << "Error during Xerces-c Initialization.\n"
                     << "  Exception message:"
                     << XMLString::transcode(toCatch.getMessage()) << std::endl;
   abort();
//FIXME         throw GenTerminate("Error during Xerces-c Initialization.");
        }
        parser = new XercesDOMParser;
        parser->setValidationScheme(XercesDOMParser::Val_Auto);
        parser->setDoNamespaces(false);
        parser->setDoSchema(false);
        parser->setValidationSchemaFullChecking(false);
        errHandler = new HandlerBase;
        parser->setErrorHandler(errHandler);
        parser->setCreateEntityReferenceNodes(false);
        //  Parse the XML file, catching any XML exceptions that might propogate out of it.
        bool errorsOccured = false;
        try
        {
                  edm::LogInfo("XMLCalibration") << "Calibration XML: parsing " << m_xmlFileName.c_str() << std::endl;
                parser->parse(m_xmlFileName.c_str());
                int errorCount = parser->getErrorCount();
                if (errorCount > 0) errorsOccured = true;
        }
        catch (const XMLException& e)
        {
                std::cerr << "A DOM error occured during parsing\n   DOMException code: "
                     << (long unsigned int)e.getCode() << std::endl;
                errorsOccured = true;
        }
        // If the parse was successful, build the structure we want to have
        if(errorsOccured) { 
                std::cerr << "An error occured during parsing\n"
                     << "Please check your input with SAXCount or a similar tool.\n Exiting!\n" << std::endl; 
abort();
//FIXME         throw GenTerminate("An error occured during parsing\n Please check your input with SAXCount or a similar tool.\n Exiting!\n");
        }

        doc = parser->getDocument();
        DOMNode* n1 = doc->getFirstChild();

        while(n1)
        {
                if (n1->getNodeType() == DOMNode::ELEMENT_NODE   ) break;
                n1 = n1->getNextSibling();
        }
        
        if(strcmp("Calibration",XMLString::transcode(n1->getNodeName())))
abort();
//FIXME         throw GenTerminate("The root element in the XML Calibration file is not a Calibration element.\n This should be forbidden at the DTD level.");
        else {   edm::LogInfo("XMLCalibration")  << "Calibration found" ; }     

        m_calibrationDOM = (DOMElement *) n1;
    


}

void CalibrationXML::saveFile(const std::string & xmlFileName)
{
    DOMImplementation * theImpl = DOMImplementationRegistry::getDOMImplementation(XMLString::transcode("Core"));
    DOMWriter         *   theSerializer = ((DOMImplementation*)theImpl)->createDOMWriter();
    theSerializer->canSetFeature(XMLUni::fgDOMWRTFormatPrettyPrint, true);
    XMLFormatTarget* myFormTarget = new LocalFileFormatTarget(XMLString::transcode(xmlFileName.c_str()));
    theSerializer->writeNode(myFormTarget, *doc);
     delete myFormTarget;
          
}
DOMElement * CalibrationXML::addChild(DOMNode *dom,const std::string & name)
{ 
          DOMNode *n1 = dom;
          int level=0;
          std::string indent="\n";
          while(n1 && level < 100)
          {
           level++;
           indent+="  ";
           n1 = n1->getParentNode();
          } 
          if(dom->getFirstChild()==0)
             dom->appendChild(dom->getOwnerDocument()->createTextNode(XMLString::transcode(indent.c_str()))); 
         
          DOMElement * child = (DOMElement *)dom->appendChild(dom->getOwnerDocument()->createElement(XMLString::transcode(name.c_str()))); 
          dom->appendChild(dom->getOwnerDocument()->createTextNode(XMLString::transcode(indent.c_str())));           
          return child;
}