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#ifndef ParameterSet_ParameterSetEntry_h
#define ParameterSet_ParameterSetEntry_h
/** How ParameterSets are nested inside ParameterSets
The main feature is that they're made persistent
using a ParameterSetID, and only reconstituted as needed,
when the value_ptr = 0;
*/
#include "FWCore/Utilities/interface/atomic_value_ptr.h"
#include "FWCore/Utilities/interface/thread_safety_macros.h"
#include "DataFormats/Provenance/interface/ParameterSetID.h"
namespace cms {
class Digest;
}
namespace edm {
// forward declaration
class ParameterSet;
class ParameterSetEntry {
public:
// default ctor for serialization
ParameterSetEntry();
ParameterSetEntry(ParameterSet const& pset, bool isTracked);
ParameterSetEntry(ParameterSetID const& id, bool isTracked);
explicit ParameterSetEntry(std::string_view rep);
~ParameterSetEntry() = default;
ParameterSetEntry(ParameterSetEntry const&) = default;
ParameterSetEntry(ParameterSetEntry&&) = default;
ParameterSetEntry& operator=(ParameterSetEntry const&) = default;
ParameterSetEntry& operator=(ParameterSetEntry&&) = default;
std::string toString() const;
void toString(std::string& result) const;
void toDigest(cms::Digest& digest) const;
bool isTracked() const { return isTracked_; }
void setIsTracked(bool v) { isTracked_ = v; }
ParameterSetID id() const { return theID_; }
/// returns the PSet
ParameterSet const& pset() const;
ParameterSet& psetForUpdate();
/// reconstitutes the PSet from the registry
void fillPSet() const;
void updateID();
std::string dump(unsigned int indent = 0) const;
friend std::ostream& operator<<(std::ostream& os, ParameterSetEntry const& psetEntry);
private:
bool isTracked_;
// can be internally reconstituted from the ID, in an
// ostensibly const function
CMS_THREAD_SAFE mutable atomic_value_ptr<ParameterSet> thePSet_;
ParameterSetID theID_;
};
} // namespace edm
#endif
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