LinkInfo.h

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/*
  Copyright (C) 2002-2020 CERN for the benefit of the ATLAS collaboration
*/
 
#ifndef TRIGCOMPOSITEUTILS_LINKINFO_H
#define TRIGCOMPOSITEUTILS_LINKINFO_H
 
#include "xAODTrigger/TrigComposite.h"
#include "AthLinks/ElementLink.h"
#include "AsgMessaging/StatusCode.h"
 
#include <set>
 
namespace TrigCompositeUtils {
  enum ActiveState {
    UNSET, 
    ACTIVE, 
    INACTIVE 
  };
 
  template<typename T>
  struct LinkInfo {
    LinkInfo() = default;
    LinkInfo(
      const Decision* s, const ElementLink<T>& l, ActiveState as = ActiveState::UNSET)
      : source{s}, link{l}, state{as} {
        if (s)
        {
          decisions.insert(s->decisions().begin(), s->decisions().end());
        }
      }
    
    LinkInfo(
      const Decision* s, const ElementLink<T>& l, ActiveState as, const DecisionIDContainer &decisions)
      : source{s}, link{l}, state{as}, decisions(decisions) {}
 
    bool isValid() const {
      return source && link.isValid();
    }
    operator StatusCode () {
      return (isValid() ? StatusCode::SUCCESS : StatusCode::FAILURE);
    }
 
    const Decision* source{nullptr};
    ElementLink<T> link;
    ActiveState state{ActiveState::UNSET};
    DecisionIDContainer decisions;
  };
} //> end namespace TrigCompositeUtils
 
#endif //> !TRIGCOMPOSITEUTILS_LINKINFO_H