DummySelector.h

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#ifndef CommonTools_UtilAlgos_DummySelector_h
#define CommonTools_UtilAlgos_DummySelector_h
/* \class DummySelector
 *
 * Dummy generic selector following the
 * interface proposed in the document:
 *
 * https://twiki.cern.ch/twiki/bin/view/CMS/SelectorInterface
 *
 * \author Luca Lista, INFN
 */
#include "FWCore/Utilities/interface/EDMException.h"

namespace edm { 
  class ParameterSet; 
  class Event;
  class EventSetup;
}

class DummySelector {
public:
  explicit DummySelector(const edm::ParameterSet&) : updated_(false) { }
  void newEvent(const edm::Event&, const edm::EventSetup&) { updated_ = true; }
  template<typename T>
  bool operator()(const T&) { 
    if(!updated_)     
      throw edm::Exception(edm::errors::Configuration)
    << "DummySelector: forgot to call newEvent\n"; 
    return true; 
  }  
private:
  bool updated_;
};

namespace dummy {
  template<typename T>
  inline bool select(const T&) { return true; }
}

EVENTSETUP_STD_INIT(DummySelector);

#endif