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Diffstat (limited to 'odb/instance.hxx')
| -rw-r--r-- | odb/instance.hxx | 296 |
1 files changed, 0 insertions, 296 deletions
diff --git a/odb/instance.hxx b/odb/instance.hxx deleted file mode 100644 index 3706a07..0000000 --- a/odb/instance.hxx +++ /dev/null @@ -1,296 +0,0 @@ -// file : odb/instance.hxx -// copyright : Copyright (c) 2009-2019 Code Synthesis Tools CC -// license : GNU GPL v3; see accompanying LICENSE file - -#ifndef ODB_INSTANCE_HXX -#define ODB_INSTANCE_HXX - -#include <map> -#include <string> -#include <cstddef> // std::size_t -#include <typeinfo> - -#include <odb/option-types.hxx> -#include <odb/context.hxx> - -#include <odb/traversal/elements.hxx> -#include <odb/traversal/relational/elements.hxx> - -// -// Dynamic traversal instantiation support. -// - -template <typename B> -struct factory -{ - static B* - create (B const& prototype) - { - std::string kind, name; - database db (context::current ().options.database ()[0]); - - switch (db) - { - case database::common: - { - name = "common"; - break; - } - case database::mssql: - case database::mysql: - case database::oracle: - case database::pgsql: - case database::sqlite: - { - kind = "relational"; - name = kind + "::" + db.string (); - break; - } - } - - if (map_ != 0) - { - typename map::const_iterator i; - - if (!name.empty ()) - i = map_->find (name); - - if (i == map_->end ()) - i = map_->find (kind); - - if (i != map_->end ()) - return i->second (prototype); - } - - return new B (prototype); - } - -private: - template <typename> - friend struct entry; - - static void - init () - { - if (factory<B>::count_++ == 0) - factory<B>::map_ = new typename factory<B>::map; - } - - static void - term () - { - if (--factory<B>::count_ == 0) - delete factory<B>::map_; - } - - typedef B* (*create_func) (B const&); - typedef std::map<std::string, create_func> map; - static map* map_; - static std::size_t count_; -}; - -template <typename B> -typename factory<B>::map* factory<B>::map_; - -template <typename B> -std::size_t factory<B>::count_; - -struct entry_base -{ - static std::string - name (std::type_info const&); -}; - -template <typename D> -struct entry: entry_base -{ - typedef typename D::base base; - - entry () - { - factory<base>::init (); - (*factory<base>::map_)[name (typeid (D))] = &create; - } - - ~entry () - { - factory<base>::term (); - } - - static base* - create (base const& prototype) - { - return new D (prototype); - } -}; - -template <typename B> -struct instance -{ - typedef typename B::base base_type; - typedef ::factory<base_type> factory_type; - - ~instance () - { - delete x_; - } - - instance () - { - base_type prototype; - x_ = factory_type::create (prototype); - } - - template <typename A1> - instance (A1& a1) - { - base_type prototype (a1); - x_ = factory_type::create (prototype); - } - - template <typename A1> - instance (A1 const& a1) - { - base_type prototype (a1); - x_ = factory_type::create (prototype); - } - - template <typename A1, typename A2> - instance (A1& a1, A2& a2) - { - base_type prototype (a1, a2); - x_ = factory_type::create (prototype); - } - - template <typename A1, typename A2> - instance (A1 const& a1, A2 const& a2) - { - base_type prototype (a1, a2); - x_ = factory_type::create (prototype); - } - - template <typename A1, typename A2, typename A3> - instance (A1& a1, A2& a2, A3& a3) - { - base_type prototype (a1, a2, a3); - x_ = factory_type::create (prototype); - } - - template <typename A1, typename A2, typename A3> - instance (A1 const& a1, A2 const& a2, A3 const& a3) - { - base_type prototype (a1, a2, a3); - x_ = factory_type::create (prototype); - } - - template <typename A1, typename A2, typename A3, typename A4> - instance (A1& a1, A2& a2, A3& a3, A4& a4) - { - base_type prototype (a1, a2, a3, a4); - x_ = factory_type::create (prototype); - } - - template <typename A1, typename A2, typename A3, typename A4> - instance (A1 const& a1, A2 const& a2, A3 const& a3, A4 const& a4) - { - base_type prototype (a1, a2, a3, a4); - x_ = factory_type::create (prototype); - } - - template <typename A1, typename A2, typename A3, typename A4, typename A5> - instance (A1& a1, A2& a2, A3& a3, A4& a4, A5& a5) - { - base_type prototype (a1, a2, a3, a4, a5); - x_ = factory_type::create (prototype); - } - - template <typename A1, typename A2, typename A3, typename A4, typename A5> - instance (A1 const& a1, A2 const& a2, A3 const& a3, A4 const& a4, - A5 const& a5) - { - base_type prototype (a1, a2, a3, a4, a5); - x_ = factory_type::create (prototype); - } - - template <typename A1, typename A2, typename A3, typename A4, typename A5, - typename A6> - instance (A1& a1, A2& a2, A3& a3, A4& a4, A5& a5, A6 a6) - { - base_type prototype (a1, a2, a3, a4, a5, a6); - x_ = factory_type::create (prototype); - } - - template <typename A1, typename A2, typename A3, typename A4, typename A5, - typename A6> - instance (A1 const& a1, A2 const& a2, A3 const& a3, A4 const& a4, - A5 const& a5, A6 const& a6) - { - base_type prototype (a1, a2, a3, a4, a5, a6); - x_ = factory_type::create (prototype); - } - - instance (instance const& i) - { - // This is tricky: use the other instance as a prototype. - // - x_ = factory_type::create (*i.x_); - } - - base_type* - operator-> () const - { - return x_; - } - - base_type& - operator* () const - { - return *x_; - } - - base_type* - get () const - { - return x_; - } - -private: - instance& operator= (instance const&); - -private: - base_type* x_; -}; - -template <typename T> -inline traversal::edge_base& -operator>> (instance<T>& n, traversal::edge_base& e) -{ - n->edge_traverser (e); - return e; -} - -template <typename T> -inline traversal::relational::edge_base& -operator>> (instance<T>& n, traversal::relational::edge_base& e) -{ - n->edge_traverser (e); - return e; -} - -template <typename T> -inline traversal::node_base& -operator>> (traversal::edge_base& e, instance<T>& n) -{ - e.node_traverser (*n); - return *n; -} - -template <typename T> -inline traversal::relational::node_base& -operator>> (traversal::relational::edge_base& e, instance<T>& n) -{ - e.node_traverser (*n); - return *n; -} - -#endif // ODB_INSTANCE_HXX |