EventObserverBase.cc

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#include "art/Framework/Core/EventObserverBase.h"

#include "art/Framework/Core/detail/parse_path_spec.h"
#include "art/Framework/Services/Registry/ServiceHandle.h"
#include "art/Framework/Services/System/TriggerNamesService.h"
#include "fhiclcpp/ParameterSet.h"
#include "fhiclcpp/ParameterSetID.h"

#include <string>
#include <vector>

using namespace std;

using fhicl::ParameterSet;

namespace art {

  EventObserverBase::EventObserverBase(vector<string> const& paths,
                                       fhicl::ParameterSet const& pset)
    : selector_config_id_{pset.id()}
  {
    init_(paths);
  }

  EventObserverBase::EventObserverBase(ParameterSet const& pset)
    : selector_config_id_{pset.id()}
  {
    auto const& paths = pset.get<vector<string>>("SelectEvents", {});
    init_(paths);
  }

  void
  EventObserverBase::init_(vector<string> const& paths)
  {
    ServiceHandle<TriggerNamesService const> TNS;
    process_name_ = TNS->getProcessName();
    vector<string> const& trigPaths = TNS->getTrigPaths();
    if (paths.empty()) {
      // No event selection criteria given, we want all events.
      wantAllEvents_ = true;
      selectors_.setupDefault(trigPaths);
      return;
    }
    // Parse the event selection criteria into
    // (process, trigger name list) pairs.
    vector<pair<string, string>> PPS(paths.size());
    for (size_t i = 0; i < paths.size(); ++i) {
      detail::parse_path_spec(paths[i], PPS[i]);
    }
    selectors_.setup(PPS, trigPaths, process_name_);
  }

} // namespace art