ToolHandleHistoHelper.h

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//  -*- c++ -*- 
 
/*
  Copyright (C) 2002-2023 CERN for the benefit of the ATLAS collaboration
*/
 
#ifndef JETMONITORING_TOOLHANDLEHISTOHELPER_H
#define JETMONITORING_TOOLHANDLEHISTOHELPER_H
#include "GaudiKernel/ToolHandle.h"
#include "JetMonitoring/HistoDefinitionTool.h"
 
namespace ToolHandleHistoHelper {
 
 
 
  struct HistoRetriever {
 
    std::string afterlastdot(const std::string& s){
      size_t i = s.find_last_of(".");
      return s.substr( i+1, s.size() );
    }
    
    HistoRetriever(ToolHandleArray<HistoDefinitionTool>& h) : histos(h) {}
 
    HistoDefinitionTool* retrieveTool( const std::string & n){
      for( auto toolH : histos){
        //std::cout << "   xxxx compare   "<< afterlastdot( toolH->name() ) << " to "<< n <<std::endl; 
        if( afterlastdot(toolH->name()) == n ) return toolH.operator->();
      }
      return NULL;
    }
 
    template<typename T >
    T* build(const std::string & n){
      std::string name = "hdef_"; name+=n;
      HistoDefinitionTool* tool = retrieveTool(name);
      if (!tool ) return NULL;
      return tool->build<T>();
  }
    
 
    ToolHandleArray<HistoDefinitionTool>& histos;
  };
 
 
}
 
 
#endif