93 lines
2.2 KiB
C++
93 lines
2.2 KiB
C++
#ifndef QUERY_FIELD_HPP
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#define QUERY_FIELD_HPP
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#include "matador/utils/value.hpp"
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#include "matador/utils/basic_types.hpp"
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#include <optional>
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#include <string>
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namespace matador::utils {
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enum class constraints : unsigned char;
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}
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namespace matador::sql {
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enum struct field_type {
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Attribute,
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PrimaryKey,
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ForeignKey
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};
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/**
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*
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*/
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class field {
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public:
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explicit field(std::string name);
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template<typename Type>
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field(std::string name, Type value, const field_type type = field_type::Attribute, const size_t size = 0, const int index = -1)
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: name_(std::move(name))
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, type_(type)
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, index_(index)
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, value_(value, size) {}
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field(std::string name, utils::basic_type dt, field_type type = field_type::Attribute, size_t size = 0, int index = -1);
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field(const field &x) = default;
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field& operator=(const field &x) = default;
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field(field &&x) noexcept;
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field& operator=(field &&x) noexcept;
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template<typename Type>
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field& operator=(Type value) {
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value_ = std::move(value);
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return *this;
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}
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[[nodiscard]] const std::string& name() const;
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[[nodiscard]] field_type type() const;
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[[nodiscard]] size_t size() const;
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[[nodiscard]] int index() const;
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template<class Type>
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std::optional<Type> as() const {
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return value_.as<Type>();
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}
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[[nodiscard]] std::string str() const;
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[[nodiscard]] bool is_integer() const;
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[[nodiscard]] bool is_floating_point() const;
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[[nodiscard]] bool is_bool() const;
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[[nodiscard]] bool is_string() const;
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[[nodiscard]] bool is_varchar() const;
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[[nodiscard]] bool is_blob() const;
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[[nodiscard]] bool is_null() const;
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[[nodiscard]] bool is_primary_key() const;
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[[nodiscard]] bool is_foreign_key() const;
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[[nodiscard]] bool is_attribute() const;
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friend std::ostream& operator<<(std::ostream &out, const field &col);
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private:
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static utils::constraints determine_constraint(field_type type);
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template<class Operator>
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void process(Operator &op) {
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op.on_attribute(name_.c_str(), value_, { value_.size(), determine_constraint(type_) } );
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}
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private:
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friend class record;
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std::string name_;
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field_type type_{field_type::Attribute};
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int index_{-1};
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utils::value value_;
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};
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}
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#endif //QUERY_FIELD_HPP
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