Modules/src/EmptySource.cc

0001 #include "FWCore/Framework/interface/Frameworkfwd.h"
0002 #include "FWCore/Framework/interface/InputSourceMacros.h"
0003 #include "FWCore/ParameterSet/interface/ConfigurationDescriptions.h"
0004 #include "FWCore/ParameterSet/interface/ParameterSetDescription.h"
0005 #include "FWCore/Framework/interface/InputSource.h"
0006 #include "FWCore/Sources/interface/IDGeneratorSourceBase.h"
0007
0008 namespace edm {
0009   class EmptySource : public IDGeneratorSourceBase<InputSource> {
0010   public:
0011     explicit EmptySource(ParameterSet const&, InputSourceDescription const&);
0012     ~EmptySource() override;
0013     static void fillDescriptions(ConfigurationDescriptions& descriptions);
0014
0015   private:
0016     bool setRunAndEventInfo(EventID& id, TimeValue_t& time, edm::EventAuxiliary::ExperimentType&) override;
0017     void readEvent_(edm::EventPrincipal&) override;
0018   };
0019
0020   EmptySource::EmptySource(ParameterSet const& pset, InputSourceDescription const& desc)
0021       : IDGeneratorSourceBase<InputSource>(pset, desc, false) {}
0022
0023   EmptySource::~EmptySource() {}
0024
0025   bool EmptySource::setRunAndEventInfo(EventID&, TimeValue_t&, edm::EventAuxiliary::ExperimentType&) { return true; }
0026
0027   void EmptySource::readEvent_(edm::EventPrincipal& e) {
0028     doReadEvent(e, [](auto const&) {});
0029   }
0030
0031   void EmptySource::fillDescriptions(ConfigurationDescriptions& descriptions) {
0032     ParameterSetDescription desc;
0033     desc.setComment("Creates runs, lumis and events containing no products.");
0034     IDGeneratorSourceBase<InputSource>::fillDescription(desc);
0035     descriptions.add("source", desc);
0036   }
0037 }  // namespace edm
0038
0039 using edm::EmptySource;
0040 DEFINE_FWK_INPUT_SOURCE(EmptySource);