LinkInfo.h

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/*
  Copyright (C) 2002-2025 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 <optional>
#include <unordered_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.emplace(s->decisions().begin(), s->decisions().end());
    }
 
    LinkInfo(const Decision* s, const ElementLink<T>& l, ActiveState as, const DecisionIDContainer &decisionIDs)
      : source{s}, link{l}, state{as} {
      decisions.emplace(decisionIDs.begin(), decisionIDs.end());
    }
 
    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};
    std::optional<std::unordered_set<DecisionID>> decisions;
  };
} //> end namespace TrigCompositeUtils
 
#endif //> !TRIGCOMPOSITEUTILS_LINKINFO_H