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#ifndef DataFormats_Provenance_FileID_h
#define DataFormats_Provenance_FileID_h
/*----------------------------------------------------------------------
Holds a unique file identifier in string form.
----------------------------------------------------------------------*/
#include <string>
namespace edm {
class FileID {
public:
FileID() : fid_() {}
explicit FileID(std::string const& id) : fid_(id) {}
bool isValid() const { return !fid().empty(); }
std::string const& fid() const { return fid_; }
private:
std::string fid_;
};
inline bool operator==(FileID const& lh, FileID const& rh) { return lh.fid() == rh.fid(); }
inline bool operator!=(FileID const& lh, FileID const& rh) { return !(lh == rh); }
std::ostream& operator<<(std::ostream& os, FileID const& id);
} // namespace edm
#endif
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