DBMemento.h

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#ifndef DBMEMENTO_H
#define DBMEMENTO_H
 
#include <stack>
#include <memory>
 
#include "IDBMemento.h"
#include "BlockAccessor.h"
 
class DBMemento : public IDBMemento {
public:
    void takeSnapshot(std::shared_ptr<BlockAccessor> blocks);
 
    void restore(size_t n_steps = 1);
 
    void print_snapshot_content(size_t n = 0);
 
    size_t stack_size();
 
private:
    static void Overwrite(std::shared_ptr<BlockAccessor>& receiver, std::shared_ptr<BlockAccessor> source);
 
    std::stack<std::shared_ptr<BlockAccessor>> snapshots;
};
 
 
#endif // DBMEMENTO_H