ParticlePrinterModule.cc

/**************************************************************************
 * basf2 (Belle II Analysis Software Framework)                           *
 * Author: The Belle II Collaboration                                     *
 *                                                                        *
 * See git log for contributors and copyright holders.                    *
 * This file is licensed under LGPL-3.0, see LICENSE.md.                  *
 **************************************************************************/
 
// Own header.
#include <analysis/modules/ParticlePrinter/ParticlePrinterModule.h>
 
// framework aux
#include <framework/logging/Logger.h>
 
// dataobjects
#include <analysis/VariableManager/Manager.h>
 
using namespace std;
using namespace Belle2;
 
//-----------------------------------------------------------------
//                 Register module
//-----------------------------------------------------------------
 
REG_MODULE(ParticlePrinter);
 
//-----------------------------------------------------------------
//                 Implementation
//-----------------------------------------------------------------
 
ParticlePrinterModule::ParticlePrinterModule() : Module()
 
{
  setDescription("Prints specified variables for all particles in the specified particle list to screen (useful for debugging).\n"
                 "Event-based variables can be printed by not specifying the particle list (empty string).");
  setPropertyFlags(c_ParallelProcessingCertified);
 
  // Add parameters
  addParam("listName", m_listName, "name of ParticleList", string(""));
  addParam("fullPrint", m_fullPrint, "execute Particle's internal print() function", true);
  vector<string> defaultVariables;
  addParam("variables", m_variables, "names of variables to be printed (see Variable::Manager)", defaultVariables);
 
}
 
void ParticlePrinterModule::initialize()
{
  if (!m_listName.empty()) {
    m_plist.isRequired(m_listName);
 
    // obtain the input and output particle lists from the decay string
    bool valid = m_decaydescriptor.init(m_listName);
    if (!valid)
      B2ERROR("ParticlePrinterModule::initialize Invalid input DecayString: " << m_listName);
 
    int nProducts = m_decaydescriptor.getNDaughters();
    if (nProducts > 0)
      B2ERROR("ParticlePrinterModule::initialize Invalid input DecayString " << m_listName
              << ". DecayString should not contain any daughters, only the mother particle.");
  }
}
 
void ParticlePrinterModule::event()
{
  bool includingVars = !(m_variables.empty());
 
  // print event based variables (particle list is empty)
  if (m_listName.empty() && includingVars) {
    printVariables(nullptr);
    return;
  }
 
  // Print variables for all particles in the list
  if (!m_plist) {
    B2ERROR("ParticleList " << m_listName << " not found");
    return;
  }
 
  if (!m_listName.empty() && m_plist->getListSize() == 0) return;
 
  B2INFO("[ParticlePrinterModule] START ------------------------------");
 
  m_plist->print();
 
  for (unsigned i = 0; i < m_plist->getListSize(); i++) {
    const Particle* particle = m_plist->getParticle(i);
    if (m_fullPrint) {
      particle->print();
    }
    if (includingVars) {
      B2INFO(" - " << particle->getArrayIndex() << " = " << particle->getPDGCode() << "[" << i << "]");
      if (particle->getParticleSource() == Particle::EParticleSourceObject::c_Composite) {
        std::string s;
        for (int idx : particle->getDaughterIndices())
          s += " " + std::to_string(idx);
        B2INFO("     o) daughter indices =" << s);
      }
      printVariables(particle);
    }
  }
  B2INFO("[ParticlePrinterModule] END   ------------------------------");
}
 
 
void ParticlePrinterModule::printVariables(const Particle* particle) const
{
  Variable::Manager& manager = Variable::Manager::Instance();
 
  for (auto& varName : m_variables) {
    auto var = manager.getVariable(varName);
    if (var == nullptr) {
      B2ERROR("ParticlePrinter: Variable::Manager doesn't have variable" << varName);
    } else {
      Variable::Manager::VarVariant result = var->function(particle);
      if (std::holds_alternative<double>(result)) {
        double value = std::get<double>(result);
        B2INFO("     o) " << varName << " = " << value);
      } else if (std::holds_alternative<int>(result)) {
        int value = std::get<int>(result);
        B2INFO("     o) " << varName << " = " << value);
      } else if (std::holds_alternative<bool>(result)) {
        bool value = std::get<bool>(result);
        B2INFO("     o) " << varName << " = " << value);
      }
    }
  }
}