Cursor.h

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/*
 * This file is part of KnowRob, please consult
 * https://github.com/knowrob/knowrob for license details.
 */
 
#ifndef KNOWROB_MONGO_CURSOR_H
#define KNOWROB_MONGO_CURSOR_H
 
#include <mongoc.h>
#include <string>
#include <memory>
#include <knowrob/storage/mongo/Collection.h>
 
namespace knowrob::mongo {
    class Cursor {
    public:
        explicit Cursor(const std::shared_ptr<Collection> &collection);
 
        Cursor(const Cursor &) = delete;
 
        ~Cursor();
 
        const auto &id() { return id_; };
 
        void limit(unsigned int limit);
 
        void ascending(const char *key);
 
        void descending(const char *key);
 
        void filter(const bson_t *query_doc);
 
        void aggregate(const bson_t *query_doc);
 
        bool next(const bson_t **doc, bool ignore_empty = false);
 
        bool erase();
 
        const auto *query() const { return query_; }
 
    private:
        std::shared_ptr<Collection> collection_;
        mongoc_cursor_t *cursor_;
        bson_t *query_;
        bson_t *opts_;
        std::string id_;
        bool isAggregateQuery_;
        int64_t limit_;
    };
}
 
#endif //KNOWROB_MONGO_CURSOR_H