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diff --git a/include/HEJ/RivetAnalysis.hh b/include/HEJ/RivetAnalysis.hh
index 147dff3..7c4d1bd 100644
--- a/include/HEJ/RivetAnalysis.hh
+++ b/include/HEJ/RivetAnalysis.hh
@@ -1,72 +1,72 @@
/** \file
* \brief HEJ 2 interface to rivet analyses
*
* \authors The HEJ collaboration (see AUTHORS for details)
* \date 2019
* \copyright GPLv2 or later
*/
#pragma once
#include <memory>
#include <string>
#include <vector>
#include "LHEF/LHEF.h"
#include "HEJ/Analysis.hh"
#include "HEJ/optional.hh"
namespace Rivet {
class AnalysisHandler;
}
namespace YAML {
class Node;
}
namespace HEJ {
/**
* @brief Class representing a Rivet analysis
*
* This class inherits from Analysis and can therefore be used
* like any other HEJ 2 analysis.
*/
class RivetAnalysis: public HEJ::Analysis {
public:
static std::unique_ptr<Analysis> create(
YAML::Node const & config, LHEF::HEPRUP const & heprup);
//! Constructor
/**
* @param config Configuration parameters
* @param heprup General run informations
*
* config["rivet"] should be the name of a single Rivet analysis or
* a list of Rivet analyses. config["output"] is the prefix for
* the .yoda output files.
*/
RivetAnalysis(YAML::Node const & config, LHEF::HEPRUP const & heprup);
~RivetAnalysis();
//! Pass an event to the underlying Rivet analysis
void fill(HEJ::Event const & event, HEJ::Event const &) override;
bool pass_cuts(HEJ::Event const &, HEJ::Event const &) override
{return true;} //!< no additional cuts are applied
void finalise() override;
private:
std::vector<std::string> analyses_names_;
- const std::string output_name_;
+ std::string output_name_;
LHEF::HEPRUP heprup_;
/// struct to organise the infos per rivet run/scale setting
struct rivet_info;
std::vector<rivet_info> rivet_runs_;
/**
* \internal
* @brief Calculates the scale variation from the first event for the output
* file
*/
void init(HEJ::Event const & event);
bool first_event_;
};
} // namespace HEJ
diff --git a/src/RivetAnalysis.cc b/src/RivetAnalysis.cc
index 8aa0825..7a8b392 100644
--- a/src/RivetAnalysis.cc
+++ b/src/RivetAnalysis.cc
@@ -1,164 +1,184 @@
/**
* \authors The HEJ collaboration (see AUTHORS for details)
* \date 2019
* \copyright GPLv2 or later
*/
#include "HEJ/RivetAnalysis.hh"
#ifdef HEJ_BUILD_WITH_RIVET
#include <ostream>
#include <stddef.h>
#include "yaml-cpp/yaml.h"
#include "Rivet/AnalysisHandler.hh"
#include "Rivet/Config/RivetConfig.hh"
#ifdef RIVET_ENABLE_HEPMC_3
#include "HepMC3/GenEvent.h"
#include "HEJ/HepMC3Interface.hh"
#else // rivet with HepMC 2
#include "HepMC/GenEvent.h"
#include "HEJ/HepMC2Interface.hh"
#endif
#include "HEJ/Event.hh"
#include "HEJ/exceptions.hh"
#endif
namespace HEJ{
std::unique_ptr<Analysis> RivetAnalysis::create(
YAML::Node const & config, LHEF::HEPRUP const & heprup
){
return std::make_unique<RivetAnalysis>(config, heprup);
}
}
#ifdef HEJ_BUILD_WITH_RIVET
namespace HEJ {
#ifdef RIVET_ENABLE_HEPMC_3
using HepMCInterface=HepMC3Interface;
#else
using HepMCInterface=HepMC2Interface;
#endif
struct RivetAnalysis::rivet_info {
rivet_info(std::unique_ptr<Rivet::AnalysisHandler> && h,
std::string && s, HEJ::HepMCInterface && m):
handler{std::move(h)}, name{std::move(s)}, hepmc{std::move(m)}
{}
// AnalysisHandler doesn't allow a copy constructor -> use ptr
std::unique_ptr<Rivet::AnalysisHandler> handler;
std::string name;
HEJ::HepMCInterface hepmc;
};
RivetAnalysis::RivetAnalysis(YAML::Node const & config,
LHEF::HEPRUP const & heprup
):
- output_name_{config["output"].as<std::string>()},
heprup_{heprup},
first_event_(true)
{
+
+ // assert that only supported options are provided
+ if(!config.IsMap()) throw invalid_type{"Rivet config has to be a map!"};
+ for(auto const & entry: config){
+ const auto name = entry.first.as<std::string>();
+ if(name != "output" && name != "rivet")
+ throw unknown_option{"Unknown option \'"+name+"\' provided to rivet."};
+ }
+
+ // get output name
+ if(!config["output"])
+ throw std::invalid_argument{
+ "No output was provided to rivet. "
+ "Either give an output or deactivate rivet."
+ };
+ if(!config["output"].IsScalar())
+ throw invalid_type{
+ "Output for rivet must be a scalar."
+ };
+ output_name_ = config["output"].as<std::string>();
+
// read in analyses
const auto & name_node = config["rivet"];
switch(name_node.Type()){
case YAML::NodeType::Scalar:
analyses_names_.push_back(name_node.as<std::string>());
break;
case YAML::NodeType::Sequence:
for(YAML::const_iterator it = name_node.begin(); it != name_node.end(); ++it){
analyses_names_.push_back(it->as<std::string>());
}
break;
default:
throw std::invalid_argument{
- "No Analysis was provided to rivet. "
+ "No analysis was provided to rivet. "
"Either give an analysis or deactivate rivet."
};
}
}
// it is a bit ugly that we can't do this directly in `initialise`
void RivetAnalysis::init(Event const & event){
#ifdef HEJ_USE_RIVET2
rivet_runs_.reserve(event.variations().size()+1);
#else
(void) event; // shut up compiler
#endif
rivet_runs_.emplace_back( std::make_unique<Rivet::AnalysisHandler>(),
std::string(""), HepMCInterface(heprup_)
);
rivet_runs_.back().handler->addAnalyses(analyses_names_);
#ifdef HEJ_USE_RIVET2
//! scale variation in rivet 2 through multiple analyses
if( !event.variations().empty() ){
for(auto const & vari : event.variations()){
rivet_runs_.emplace_back( std::make_unique<Rivet::AnalysisHandler>(),
"."+to_simple_string(*vari.description), HepMCInterface(heprup_)
);
rivet_runs_.back().handler->addAnalyses(analyses_names_);
}
}
#endif
}
void RivetAnalysis::fill(Event const & event, Event const &){
if(first_event_){
first_event_=false;
init(event);
}
auto hepmc_event(rivet_runs_.front().hepmc(event));
rivet_runs_.front().handler->analyze(hepmc_event);
#ifdef HEJ_USE_RIVET2
for(size_t i = 1; i < rivet_runs_.size(); ++i){
auto & run = rivet_runs_[i];
run.hepmc.set_central(hepmc_event, event, i-1);
run.handler->analyze(hepmc_event);
}
#endif
}
void RivetAnalysis::finalise(){
for(auto & run: rivet_runs_){
run.handler->finalize();
run.handler->writeData(output_name_+run.name+std::string(".yoda"));
}
}
} // namespace HEJ
#else // no rivet => create empty analysis
namespace Rivet {
class AnalysisHandler {};
}
namespace HEJ {
struct RivetAnalysis::rivet_info{};
RivetAnalysis::RivetAnalysis(YAML::Node const &, LHEF::HEPRUP const &){
throw std::invalid_argument(
"Failed to create RivetAnalysis: "
"HEJ 2 was built without rivet support"
);
}
void RivetAnalysis::init(Event const &){}
void RivetAnalysis::fill(Event const &, Event const &){}
void RivetAnalysis::finalise(){}
} // namespace HEJ
#endif
namespace HEJ {
RivetAnalysis::~RivetAnalysis() = default;
}

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