added primary key resolver

include/matador/object/primary_key_resolver.hpp

@@ -0,0 +1,64 @@
+#ifndef PRIMARY_KEY_RESOLVER_HPP
+#define PRIMARY_KEY_RESOLVER_HPP
+
+#include "matador/utils/access.hpp"
+#include "matador/utils/field_attributes.hpp"
+#include "matador/utils/foreign_attributes.hpp"
+#include "matador/utils/identifier.hpp"
+
+#include <cstdint>
+#include <string>
+#include <type_traits>
+
+
+namespace matador::object {
+
+struct primary_key_info {
+  std::string column_name;
+  utils::identifier pk;
+};
+
+class primary_key_resolver final {
+public:
+  template <typename Type>
+  primary_key_info resolve() {
+    Type obj;
+
+    return resolve(obj);
+  }
+
+  template <typename Type>
+  primary_key_info resolve(const Type& obj) {
+    access::process(*this, obj);
+
+    return primary_key_info_;
+  }
+
+  template < class Type >
+  void on_primary_key(const char *id, Type &pk, std::enable_if_t<std::is_integral_v<Type> && !std::is_same_v<bool, Type>>* = nullptr) {
+    primary_key_info_.column_name = id;
+    primary_key_info_.pk = pk;
+  }
+
+  void on_primary_key(const char *id, const std::string &pk, size_t size);
+
+  void on_revision(const char * /*id*/, uint64_t &/*rev*/) {}
+  template<typename Type>
+  void on_attribute(const char * /*id*/, Type &/*val*/, const utils::field_attributes &/*attr*/ = utils::null_attributes) {}
+  template<class Pointer>
+  void on_belongs_to(const char * /*id*/, Pointer &/*val*/, const utils::foreign_attributes &/*attr*/) {}
+  template<class Pointer>
+  void on_has_one(const char * /*id*/, Pointer &/*val*/, const utils::foreign_attributes &/*attr*/) {}
+  template<class ContainerType>
+  void on_has_many(const char * /*id*/, ContainerType &/*col*/, const char *, const utils::foreign_attributes &/*attr*/) {}
+  template<class ContainerType>
+  void on_has_many_to_many(const char * /*id*/, ContainerType &/*col*/, 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 &/*col*/, const utils::foreign_attributes &/*attr*/) {}
+
+private:
+  primary_key_info primary_key_info_{};
+};
+
+}
+#endif //PRIMARY_KEY_RESOLVER_HPP

source/core/CMakeLists.txt

@@ -59,6 +59,8 @@ add_library(matador-core STATIC
   utils/types.cpp
   utils/value.cpp
   utils/version.cpp
+  ../../include/matador/object/primary_key_resolver.hpp
+  object/primary_key_resolver.cpp
 )
 
 target_link_libraries(matador-core ${CMAKE_DL_LIBS})

source/core/object/primary_key_resolver.cpp

@@ -0,0 +1,8 @@
+#include "matador/object/primary_key_resolver.hpp"
+
+namespace matador::object {
+void primary_key_resolver::on_primary_key(const char *id, const std::string &pk, size_t /*size*/) {
+  primary_key_info_.column_name = id;
+  primary_key_info_.pk = pk;
+}
+}