113 lines
3.7 KiB
C++
113 lines
3.7 KiB
C++
#ifndef QUERY_COLUMN_GENERATOR_HPP
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#define QUERY_COLUMN_GENERATOR_HPP
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#include "matador/sql/column.hpp"
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#include "matador/sql/types.hpp"
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#include "matador/utils/access.hpp"
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#include "matador/utils/field_attributes.hpp"
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#include "matador/utils/identifiable.hpp"
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#include "matador/utils/identifier.hpp"
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#include <vector>
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namespace matador::utils {
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enum class cascade_type;
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}
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namespace matador::sql {
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namespace detail {
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class null_identifiable : public utils::identifiable
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{
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public:
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void reset(const utils::identifier &) override {};
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[[nodiscard]] bool has_primary_key() const override { return false; }
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[[nodiscard]] const utils::identifier& primary_key() const override { return id_; }
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utils::identifier& primary_key() override { return id_; }
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[[nodiscard]] utils::identifier create_identifier() const override { return utils::identifier(id_); }
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private:
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utils::identifier id_;
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};
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static null_identifiable null_id;
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}
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class fk_column_generator : public utils::identifier_serializer
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{
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public:
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column generate(const char *id, utils::identifiable &x);
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void serialize(short &i, const utils::field_attributes &attributes) override;
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void serialize(int &i, const utils::field_attributes &attributes) override;
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void serialize(long &i, const utils::field_attributes &attributes) override;
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void serialize(long long int &i, const utils::field_attributes &attributes) override;
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void serialize(unsigned short &i, const utils::field_attributes &attributes) override;
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void serialize(unsigned int &i, const utils::field_attributes &attributes) override;
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void serialize(unsigned long &i, const utils::field_attributes &attributes) override;
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void serialize(unsigned long long int &i, const utils::field_attributes &attributes) override;
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void serialize(std::string &string, const utils::field_attributes &attributes) override;
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void serialize(utils::null_type_t &type, const utils::field_attributes &attributes) override;
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private:
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utils::identifiable &identifiable_{detail::null_id};
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const char *id_{};
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column column_;
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};
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class column_generator
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{
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private:
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explicit column_generator(std::vector<column> &columns);
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public:
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~column_generator() = default;
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template < class Type >
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static std::vector<column> generate()
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{
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std::vector<column> columns;
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column_generator gen(columns);
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Type obj;
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matador::utils::access::process(gen, obj);
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return std::move(columns);
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}
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template < class V >
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void on_primary_key(const char *, V &x, typename std::enable_if<std::is_integral<V>::value && !std::is_same<bool, V>::value>::type* = 0);
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void on_primary_key(const char *id, std::string &pk, size_t size);
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void on_revision(const char *id, unsigned long long &rev);
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template<typename Type>
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void on_attribute(const char *id, Type &x, const utils::field_attributes &attr = utils::null_attributes);
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void on_belongs_to(const char *id, utils::identifiable &x, utils::cascade_type);
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void on_has_one(const char *id, utils::identifiable &x, utils::cascade_type);
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template<class ContainerType>
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void on_has_many(const char *, ContainerType &, const char *, const char *, utils::cascade_type) {}
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template<class ContainerType>
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void on_has_many(const char *, ContainerType &, utils::cascade_type) {}
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private:
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size_t index_ = 0;
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std::vector<column> &columns_;
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fk_column_generator fk_column_generator_;
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};
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template<typename V>
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void column_generator::on_primary_key(const char *id, V &x, typename std::enable_if<std::is_integral<V>::value && !std::is_same<bool, V>::value>::type*)
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{
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on_attribute(id, x, { utils::constraints::PRIMARY_KEY });
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}
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template<typename Type>
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void column_generator::on_attribute(const char *id, Type &x, const utils::field_attributes &attr)
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{
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columns_.emplace_back(id, x, attr);
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}
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}
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#endif //QUERY_COLUMN_GENERATOR_HPP
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