133 lines
4.2 KiB
C++
133 lines
4.2 KiB
C++
#ifndef QUERY_QUERY_RESULT_IMPL_HPP
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#define QUERY_QUERY_RESULT_IMPL_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/sql/any_type.hpp"
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#include "matador/sql/query_result_reader.hpp"
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#include "matador/sql/record.hpp"
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#include "matador/sql/types.hpp"
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#include <memory>
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#include <string>
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namespace matador::sql {
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namespace detail {
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class pk_reader
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{
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public:
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explicit pk_reader(query_result_reader &reader);
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template<class Type>
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void read(Type &obj, size_t column_index)
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{
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column_index_ = column_index;
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utils::access::process(*this, obj);
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}
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template<typename ValueType>
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void on_primary_key(const char *id, ValueType &value, typename std::enable_if<std::is_integral<ValueType>::value && !std::is_same<bool, ValueType>::value>::type* = 0);
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void on_primary_key(const char *id, std::string &value, size_t size);
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void on_revision(const char * /*id*/, unsigned long long &/*rev*/) {}
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template < class 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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template < class Pointer >
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void on_belongs_to(const char * /*id*/, Pointer &/*x*/, utils::cascade_type) {}
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template < class Pointer >
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void on_has_one(const char * /*id*/, Pointer &/*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 column_index_{};
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query_result_reader &reader_;
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};
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}
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class query_result_impl
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{
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public:
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query_result_impl(std::unique_ptr<query_result_reader> &&reader, record prototype);
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template<typename ValueType>
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void on_primary_key(const char *id, ValueType &value, typename std::enable_if<std::is_integral<ValueType>::value && !std::is_same<bool, ValueType>::value>::type* = 0)
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{
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data_type_traits<ValueType>::read_value(*reader_, id, column_index_++, value);
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}
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void on_primary_key(const char *id, std::string &value, size_t size);
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void on_revision(const char *id, unsigned long long &rev);
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template < class 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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{
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data_type_traits<Type>::read_value(*reader_, id, column_index_++, x);
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}
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void on_attribute(const char *id, char *value, const utils::field_attributes &attr = utils::null_attributes);
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void on_attribute(const char *id, std::string &value, const utils::field_attributes &attr = utils::null_attributes);
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void on_attribute(const char *id, any_type &value, data_type_t type, const utils::field_attributes &attr = utils::null_attributes);
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template < class Pointer >
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void on_belongs_to(const char * /*id*/, Pointer &x, utils::cascade_type)
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{
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if (!x.get()) {
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x.reset(new typename Pointer::value_type);
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}
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pk_reader_.read(*x, column_index_++);
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}
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template < class Pointer >
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void on_has_one(const char * /*id*/, Pointer &x, utils::cascade_type)
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{
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if (!x.get()) {
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x.reset(new typename Pointer::value_type);
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}
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pk_reader_.read(*x, column_index_++);
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}
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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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template<class Type>
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void bind(const Type &) {}
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template<class Type>
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bool fetch(Type &obj)
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{
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column_index_ = 0;
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if (!reader_->fetch()) {
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return false;
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}
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matador::utils::access::process(*this, obj);
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return true;
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}
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[[nodiscard]] const record& prototype() const;
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protected:
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size_t column_index_ = 0;
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record prototype_;
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std::unique_ptr<query_result_reader> reader_;
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detail::pk_reader pk_reader_;
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};
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namespace detail {
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template<typename ValueType>
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void detail::pk_reader::on_primary_key(const char *id, ValueType &value, typename std::enable_if<std::is_integral<ValueType>::value && !std::is_same<bool, ValueType>::value>::type *)
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{
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data_type_traits<ValueType>::read_value(reader_, id, column_index_++, value);
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}
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}
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}
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#endif //QUERY_QUERY_RESULT_IMPL_HPP
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