MonitorXMLParser.h

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#ifndef MonitorXMLParser_h
#define MonitorXMLParser_h

#include <string>
#include <vector>
#include <map>
#include <iostream>

#include <xercesc/dom/DOM.hpp>
#include <xercesc/dom/DOMElement.hpp>
#include <xercesc/parsers/XercesDOMParser.hpp>

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enum { ERROR_ARGS = 1 ,
       ERROR_XERCES_INIT ,
       ERROR_PARSE ,
       ERROR_EMPTY_DOCUMENT
};

// - - - - - - - - - - - - - - - - - - - -

struct DbQuery { std::string query;
                 std::string arg;
                 std::string alias; };

struct DB_ME { std::string type;
               std::string title;
               int xbins; double xfrom; double xto; 
               int ybins; double yfrom; double yto;
               int zbins; double zfrom; double zto;
               unsigned int ncycle;
               unsigned int loop;
               std::vector< DbQuery > queries; };

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class TagNames {

public:
  XMLCh* TAG_DBE;
  XMLCh* TAG_ME;
  XMLCh* TAG_1D;
  XMLCh* TAG_2D;
  XMLCh* TAG_TPROFILE;
  XMLCh* TAG_TPROFILE2D;
  XMLCh* TAG_QUERY;

  XMLCh* ATTR_TITLE;
  XMLCh* ATTR_XBINS;
  XMLCh* ATTR_XFROM;
  XMLCh* ATTR_XTO;
  XMLCh* ATTR_YBINS;
  XMLCh* ATTR_YFROM;
  XMLCh* ATTR_YTO;
  XMLCh* ATTR_ZBINS;
  XMLCh* ATTR_ZFROM;
  XMLCh* ATTR_ZTO;
  XMLCh* ATTR_NCYCLE;
  XMLCh* ATTR_LOOP;
  XMLCh* ATTR_NAME;
  XMLCh* ATTR_ARG;
  XMLCh* ATTR_ALIAS;  

  TagNames() :
    TAG_DBE( xercesc::XMLString::transcode( "dbelements" ) ),
    TAG_ME( xercesc::XMLString::transcode( "me" ) ),
    TAG_1D( xercesc::XMLString::transcode( "th1d" ) ),
    TAG_2D( xercesc::XMLString::transcode( "th2d" ) ),
    TAG_TPROFILE( xercesc::XMLString::transcode( "tprofile" ) ),
    TAG_TPROFILE2D( xercesc::XMLString::transcode( "tprofile2d" ) ),
    TAG_QUERY( xercesc::XMLString::transcode( "query" ) ),

    ATTR_TITLE( xercesc::XMLString::transcode( "title" ) ),
    ATTR_XBINS( xercesc::XMLString::transcode( "xbins" ) ),   
    ATTR_XFROM( xercesc::XMLString::transcode( "xfrom" ) ),
    ATTR_XTO( xercesc::XMLString::transcode( "xto" ) ),
    ATTR_YBINS( xercesc::XMLString::transcode( "ybins" ) ),
    ATTR_YFROM( xercesc::XMLString::transcode( "yfrom" ) ),
    ATTR_YTO( xercesc::XMLString::transcode( "yto" ) ),
    ATTR_ZBINS( xercesc::XMLString::transcode( "ybins" ) ),
    ATTR_ZFROM( xercesc::XMLString::transcode( "yfrom" ) ),
    ATTR_ZTO( xercesc::XMLString::transcode( "yto" ) ),
    ATTR_NCYCLE( xercesc::XMLString::transcode( "ncycle" ) ),
    ATTR_LOOP( xercesc::XMLString::transcode( "loop" ) ),
    ATTR_NAME( xercesc::XMLString::transcode( "name" ) ),
    ATTR_ARG( xercesc::XMLString::transcode( "arg" ) ),
    ATTR_ALIAS( xercesc::XMLString::transcode( "alias" ) )  { 

    return ;

  }


  ~TagNames() noexcept(false){
    
    try{

      xercesc::XMLString::release( &TAG_DBE ) ;
      xercesc::XMLString::release( &TAG_ME ) ;
      xercesc::XMLString::release( &TAG_1D ) ;
      xercesc::XMLString::release( &TAG_2D ) ;
      xercesc::XMLString::release( &TAG_TPROFILE ) ;
      xercesc::XMLString::release( &TAG_TPROFILE2D ) ;
      xercesc::XMLString::release( &TAG_QUERY ) ;
      
      xercesc::XMLString::release( &ATTR_TITLE ) ;
      xercesc::XMLString::release( &ATTR_XFROM ) ;
      xercesc::XMLString::release( &ATTR_XTO ) ;
      xercesc::XMLString::release( &ATTR_XBINS ) ;
      xercesc::XMLString::release( &ATTR_YFROM ) ;
      xercesc::XMLString::release( &ATTR_YTO ) ;
      xercesc::XMLString::release( &ATTR_YBINS ) ;
      xercesc::XMLString::release( &ATTR_NCYCLE ) ;
      xercesc::XMLString::release( &ATTR_LOOP ) ;
      xercesc::XMLString::release( &ATTR_NAME ) ;
      xercesc::XMLString::release( &ATTR_ARG ) ;
      xercesc::XMLString::release( &ATTR_ALIAS ) ;

    }catch( xercesc::XMLException& e ){
   
      char* message = xercesc::XMLString::transcode( e.getMessage() );
   
      std::ostringstream buf ;
      buf << "Error parsing file: " << message << std::flush;
   
      xercesc::XMLString::release( &message );
   
      throw( std::runtime_error( buf.str() ) );
   
    }catch( const xercesc::DOMException& e ){
   
      char* message = xercesc::XMLString::transcode( e.getMessage() );
   
      std::ostringstream buf;
      buf << "Encountered DOM Exception: " << message << std::flush;
   
      xercesc::XMLString::release( &message );
   
      throw( std::runtime_error( buf.str() ) );
   
    }

  } 

}; // class TagNames


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class MonitorXMLParser {

private:
  
  std::vector< DB_ME >      DBMonitoringElements_;
  std::string               xmlFile_;
  xercesc::XercesDOMParser* parser_;
  TagNames*                 tags_;
  void handleElement( xercesc::DOMElement* element );

public:

  MonitorXMLParser( const std::string& fromFile );

  ~MonitorXMLParser() throw();

  const std::vector< DB_ME > & getDB_ME( void ) const { return (DBMonitoringElements_ ); }

  void load() noexcept(false);

}; // class MonitorXMLParser

#endif // MonitorXMLParser_h