132 lines
4.6 KiB
C++
132 lines
4.6 KiB
C++
#ifndef MATADOR_PRIMARY_KEY_ACCESSOR_HPP
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#define MATADOR_PRIMARY_KEY_ACCESSOR_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/identifier.hpp"
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#include "matador/utils/primary_key_attribute.hpp"
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#include <cstdint>
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#include <string>
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#include <utility>
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namespace matador::utils {
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class foreign_attributes;
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namespace detail {
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class primary_key_setter {
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public:
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template <typename ObjectType>
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void set(ObjectType &obj, const identifier& pk) {
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pk_ = pk;
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access::process(*this, obj);
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}
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template<typename BaseType>
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static void on_base(const BaseType&) {}
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template<typename PrimaryKeyType>
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void on_primary_key(const char * /*id*/, PrimaryKeyType &pk, const primary_key_attribute & = DefaultPkAttributes) {
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const auto value = pk_.convert<PrimaryKeyType>();
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if (!value) {
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// Todo: throw error
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}
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pk = value.value();
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}
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static void on_revision(const char * /*id*/, uint64_t & /*rev*/) {}
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template<typename T>
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static void on_attribute(const char * /*id*/, T &, const field_attributes & = NullAttributes) {}
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template<class P>
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static void on_belongs_to(const char * /*id*/, P &, const foreign_attributes & ) {}
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template<class P>
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static void on_has_one(const char * /*id*/, P &, const foreign_attributes & ) {}
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template<class C>
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static void on_has_many(const char * /*id*/, C &, const char * /*join_column*/, const foreign_attributes & ) {}
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template<class C>
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static void on_has_many_to_many(const char * /*id*/, C &, const char * /*join_column*/, const char * /*inverse_join_column*/, const foreign_attributes & ) {}
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template<class C>
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static void on_has_many_to_many(const char * /*id*/, C &, const foreign_attributes & ) {}
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private:
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identifier pk_{};
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};
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struct pk_unset_checker {
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bool unset{true};
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template<typename BaseType>
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static void on_base(const BaseType&) {}
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template<class PrimaryKeyType>
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void on_primary_key(const char * /*id*/, PrimaryKeyType &pk, const primary_key_attribute & = DefaultPkAttributes) {
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unset = !identifier_type_traits<PrimaryKeyType>::is_valid(pk);
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}
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static void on_revision(const char * /*id*/, uint64_t & /*rev*/) {}
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template<typename T>
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static void on_attribute(const char * /*id*/, T &, const field_attributes & = NullAttributes) {}
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template<class P>
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static void on_belongs_to(const char * /*id*/, P &, const foreign_attributes & ) {}
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template<class P>
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static void on_has_one(const char * /*id*/, P &, const foreign_attributes & ) {}
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template<class C>
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static void on_has_many(const char * /*id*/, C &, const char * /*join_column*/, const foreign_attributes & ) {}
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template<class C>
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static void on_has_many_to_many(const char * /*id*/, C &, const char * /*join_column*/, const char * /*inverse_join_column*/, const foreign_attributes & ) {}
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template<class C>
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static void on_has_many_to_many(const char * /*id*/, C &, const foreign_attributes & ) {}
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};
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struct primary_key_getter {
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std::uint64_t value{0};
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template<typename BaseType>
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static void on_base(const BaseType&) {}
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template<class PrimaryKeyType>
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void on_primary_key(const char * /*id*/, PrimaryKeyType &pk, const primary_key_attribute & = DefaultPkAttributes) {
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pk_ = pk;
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}
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static void on_revision(const char * /*id*/, uint64_t & /*rev*/) {}
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template<typename T>
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static void on_attribute(const char * /*id*/, T &, const field_attributes & = NullAttributes) {}
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template<class P>
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static void on_belongs_to(const char * /*id*/, P &, const foreign_attributes & ) {}
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template<class P>
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static void on_has_one(const char * /*id*/, P &, const foreign_attributes & ) {}
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template<class C>
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static void on_has_many(const char * /*id*/, C &, const char * /*join_column*/, const foreign_attributes & ) {}
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template<class C>
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static void on_has_many_to_many(const char * /*id*/, C &, const char * /*join_column*/, const char * /*inverse_join_column*/, const foreign_attributes & ) {}
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template<class C>
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static void on_has_many_to_many(const char * /*id*/, C &, const foreign_attributes & ) {}
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identifier pk_;
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};
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}
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class primary_key_accessor {
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public:
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template<class Type>
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identifier get(const Type &obj) {
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access::process(pk_getter_, obj);
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return pk_getter_.pk_;
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}
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template<class Type>
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void set(Type &obj, const identifier &pk) {
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pk_setter_.set(obj, pk);
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}
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template<class Type>
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bool is_set(const Type &obj) {
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access::process(pk_unset_checker_, obj);
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return !pk_unset_checker_.unset;
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}
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private:
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detail::primary_key_setter pk_setter_;
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detail::pk_unset_checker pk_unset_checker_;
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detail::primary_key_getter pk_getter_;
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};
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}
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#endif //MATADOR_PRIMARY_KEY_ACCESSOR_HPP
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