initial matador ng commit

2025-02-02 20:37:12 +01:00
parent 19de5714f4
commit ded3daceb3
378 changed files with 14913 additions and 13431 deletions
@@ -0,0 +1,172 @@
+#ifndef QUERY_QUERY_RESULT_IMPL_HPP
+#define QUERY_QUERY_RESULT_IMPL_HPP
+
+#include "matador/utils/access.hpp"
+#include "matador/utils/field_attributes.hpp"
+#include "matador/utils/foreign_attributes.hpp"
+#include "matador/utils/default_type_traits.hpp"
+
+#include "matador/sql/interface/query_result_reader.hpp"
+
+#include "matador/sql/column_definition.hpp"
+
+#include <memory>
+#include <string>
+
+namespace matador::utils {
+class value;
+}
+
+namespace matador::sql {
+
+namespace detail {
+class pk_reader
+{
+public:
+  explicit pk_reader(query_result_reader &reader);
+
+  template<class Type>
+  void read(Type &obj, const size_t column_index)
+  {
+    column_index_ = column_index;
+    access::process(*this, obj);
+  }
+
+  template<typename ValueType>
+  void on_primary_key(const char *id, ValueType &value, std::enable_if_t<std::is_integral_v<ValueType> && !std::is_same_v<bool, ValueType>>* = nullptr);
+  void on_primary_key(const char *id, std::string &value, size_t size);
+  void on_revision(const char * /*id*/, unsigned long long &/*rev*/) {}
+
+  template < class Type >
+  void on_attribute(const char * /*id*/, Type &/*x*/, const utils::field_attributes &/*attr*/ = utils::null_attributes) {}
+  template < class Pointer >
+  void on_belongs_to(const char * /*id*/, Pointer &/*x*/, const utils::foreign_attributes &/*attr*/) {}
+  template < class Pointer >
+  void on_has_one(const char * /*id*/, Pointer &/*x*/, const utils::foreign_attributes &/*attr*/) {}
+
+  template<class ContainerType>
+  void on_has_many(const char * /*id*/, ContainerType &, const char *, const utils::foreign_attributes &/*attr*/) {}
+  template<class ContainerType>
+  void on_has_many_to_many(const char *id, ContainerType &c, const char *join_column, const char *inverse_join_column, const utils::foreign_attributes &/*attr*/) {}
+  template<class ContainerType>
+  void on_has_many_to_many(const char *id, ContainerType &c, const utils::foreign_attributes &/*attr*/) {}
+
+private:
+  size_t column_index_{};
+  query_result_reader &reader_;
+};
+
+}
+
+class query_result_impl
+{
+public:
+  query_result_impl(std::unique_ptr<query_result_reader> &&reader, std::vector<column_definition> &&prototype, size_t column_index = 0);
+  query_result_impl(std::unique_ptr<query_result_reader> &&reader, const std::vector<column_definition> &prototype, size_t column_index = 0);
+
+  template<typename ValueType>
+  void on_primary_key(const char *id, ValueType &value, std::enable_if_t<std::is_integral_v<ValueType> && !std::is_same_v<bool, ValueType>>* = nullptr)
+  {
+    utils::data_type_traits<ValueType>::read_value(*reader_, id, column_index_++, value);
+  }
+  void on_primary_key(const char *id, std::string &value, size_t size);
+  void on_revision(const char *id, uint64_t &rev);
+
+  template < class Type >
+  void on_attribute(const char *id, Type &x, const utils::field_attributes &/*attr*/ = utils::null_attributes)
+  {
+    utils::data_type_traits<Type>::read_value(*reader_, id, column_index_++, x);
+  }
+  void on_attribute(const char *id, char *value, const utils::field_attributes &attr = utils::null_attributes);
+  void on_attribute(const char *id, std::string &value, const utils::field_attributes &attr = utils::null_attributes);
+  void on_attribute(const char *id, utils::value &val, const utils::field_attributes &attr = utils::null_attributes);
+
+  template < class Pointer >
+  void on_belongs_to(const char * /*id*/, Pointer &x, const utils::foreign_attributes &attr)
+  {
+    if (x.empty()) {
+      x = new typename Pointer::value_type;
+    }
+    if (attr.fetch() == utils::fetch_type::LAZY) {
+      pk_reader_.read(*x, column_index_++);
+    } else {
+      access::process(*this, *x);
+    }
+  }
+  template < class Pointer >
+  void on_has_one(const char * /*id*/, Pointer &x, const utils::foreign_attributes &attr)
+  {
+    if (x.empty()) {
+      x = new typename Pointer::value_type;
+    }
+    if (attr.fetch() == utils::fetch_type::LAZY) {
+      pk_reader_.read(*x, column_index_++);
+    } else {
+      access::process(*this, *x);
+    }
+  }
+
+  template<class ContainerType>
+  void on_has_many_to_many(const char *, ContainerType &, const char * /*join_column*/, const char * /*inverse_join_column*/, const utils::foreign_attributes &/*attr*/) {}
+  template<class ContainerType>
+  void on_has_many_to_many(const char *, ContainerType &, const utils::foreign_attributes &/*attr*/) {}
+  template<class ContainerType>
+  void on_has_many(const char * /*id*/, ContainerType &cont, const char * /*join_column*/, const utils::foreign_attributes &attr) {
+      if ( attr.fetch() == utils::fetch_type::LAZY ) {
+          // pk_reader_.read(*id, column_index_++);
+      } else {
+          auto obj = std::make_unique<typename ContainerType::value_type::value_type>();
+          // typename ContainerType::value_type x(new typename ContainerType::value_type::value_type);
+          access::process(*this, *obj);
+          auto ptr = typename ContainerType::value_type(obj.release());
+          const auto pk = ptr.primary_key();
+          if (ptr.primary_key().is_valid()) {
+              cont.push_back(ptr);
+          }
+      }
+  }
+  template<class ContainerType>
+  void on_has_many(const char *, ContainerType &, const utils::foreign_attributes &/*attr*/) {}
+
+  template<class Type>
+  void bind(const Type &obj)
+  {
+    reader_->bind(obj);
+  }
+
+  template<class Type>
+  bool fetch(Type &obj)
+  {
+    column_index_ = reader_->start_column_index();
+    auto fetched = reader_->fetch();
+    if (!fetched.is_ok()) {
+      return false;
+    }
+    if (!*fetched) {
+      return false;
+    }
+    access::process(*this, obj);
+    return true;
+  }
+
+  [[nodiscard]] const std::vector<column_definition>& prototype() const;
+
+protected:
+  size_t column_index_ = 0;
+  std::vector<column_definition> prototype_;
+  std::unique_ptr<query_result_reader> reader_;
+  detail::pk_reader pk_reader_;
+};
+
+namespace detail {
+
+template<typename ValueType>
+void detail::pk_reader::on_primary_key(const char *id, ValueType &value, std::enable_if_t<std::is_integral_v<ValueType> && !std::is_same_v<bool, ValueType>> *)
+{
+  utils::data_type_traits<ValueType>::read_value(reader_, id, column_index_++, value);
+}
+
+}
+}
+
+#endif //QUERY_QUERY_RESULT_IMPL_HPP