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#ifndef GENERS_ABSREFERENCE_HH_
#define GENERS_ABSREFERENCE_HH_
#include "Alignment/Geners/interface/ClassId.hh"
#include "Alignment/Geners/interface/SearchSpecifier.hh"
#include <iostream>
#include <memory>
#include <vector>
namespace gs {
class AbsArchive;
class CatalogEntry;
class AbsReference {
public:
AbsReference() = delete;
inline virtual ~AbsReference() {}
inline AbsArchive &archive() const { return archive_; }
inline const ClassId &type() const { return classId_; }
inline const std::string &ioPrototype() const { return ioProto_; }
inline const SearchSpecifier &namePattern() const { return namePattern_; }
inline const SearchSpecifier &categoryPattern() const { return categoryPattern_; }
// Determine if the item in the catalog is compatible for I/O
// purposes with the one referenced here
virtual bool isIOCompatible(const CatalogEntry &r) const;
// Check I/O prototype only allowing for class id mismatch
bool isSameIOPrototype(const CatalogEntry &r) const;
// Are there any items referenced?
bool empty() const;
// Exactly one item referenced?
bool unique() const;
// How many items are referenced?
unsigned long size() const;
// The following function throws gs::IOOutOfRange exception
// if the index is out of range
unsigned long long id(unsigned long index) const;
// Catalog entry retrieval by index in the list of referenced items.
// Throws gs::IOOutOfRange exception if the index is out of range.
std::shared_ptr<const CatalogEntry> indexedCatalogEntry(unsigned long index) const;
protected:
// Use the following constructor to retrieve an item with
// a known id
AbsReference(AbsArchive &ar, const ClassId &classId, const char *ioProto, unsigned long long itemId);
// Use the following constructor to search for items which
// match name and category patterns
AbsReference(AbsArchive &ar,
const ClassId &classId,
const char *ioProto,
const SearchSpecifier &namePattern,
const SearchSpecifier &categoryPattern);
std::istream &positionInputStream(unsigned long long id) const;
private:
friend class AbsArchive;
void initialize() const;
void addItemId(unsigned long long id);
AbsArchive &archive_;
ClassId classId_;
std::string ioProto_;
// The following items will be filled or not,
// depending on which constructor was called
unsigned long long searchId_;
SearchSpecifier namePattern_;
SearchSpecifier categoryPattern_;
// Id for a unique verified item
unsigned long long itemId_;
// The item list in case ids are not unique
std::vector<unsigned long long> idList_;
// We can't talk to the archive from the constructor
// because we need correct "isIOCompatible" which
// can be overriden by derived classes. Therefore,
// we will delay archive searching until the first
// function call.
bool initialized_;
};
} // namespace gs
#endif // GENERS_ABSREFERENCE_HH_
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