diff options
Diffstat (limited to 'odb/header.cxx')
| -rw-r--r-- | odb/header.cxx | 321 |
1 files changed, 320 insertions, 1 deletions
diff --git a/odb/header.cxx b/odb/header.cxx index 8e39b75..67e4cc0 100644 --- a/odb/header.cxx +++ b/odb/header.cxx @@ -10,6 +10,297 @@ using namespace std; namespace header { + struct class_: traversal::class_, virtual context + { + virtual void + traverse (type& c) + { + if (!options.at_once () && class_file (c) != unit.file ()) + return; + + if (object (c)) + traverse_object (c); + else if (view (c)) + traverse_view (c); + } + + void + traverse_object (type&); + + void + traverse_view (type&); + + void + traverse_composite (type&); + }; +} + +void header::class_:: +traverse_object (type& c) +{ + using semantics::data_member; + + data_member* id (id_member (c)); + bool auto_id (id && auto_ (*id)); + bool base_id (id && &id->scope () != &c); // Comes from base. + + data_member* optimistic (context::optimistic (c)); + + type* poly_root (polymorphic (c)); + bool poly (poly_root != 0); + bool poly_derived (poly && poly_root != &c); + type* poly_base (poly_derived ? &polymorphic_base (c) : 0); + data_member* discriminator (poly ? context::discriminator (*poly_root) : 0); + + bool abst (abstract (c)); + bool reuse_abst (abst && !poly); + + string const& type (class_fq_name (c)); + + os << "// " << class_name (c) << endl + << "//" << endl; + + // class_traits + // + os << "template <>" << endl + << "struct class_traits< " << type << " >" + << "{" + << "static const class_kind kind = class_object;" + << "};"; + + // object_traits + // + os << "template <>" << endl + << "class access::object_traits< " << type << " >" + << "{" + << "public:" << endl; + + // object_type & pointer_type + // + os << "typedef " << type << " object_type;" + << "typedef " << c.get<string> ("object-pointer") << " pointer_type;" + << "typedef odb::pointer_traits<pointer_type> pointer_traits;" + << endl; + + // polymorphic, root_type, base_type, etc. + // + os << "static const bool polymorphic = " << (poly ? "true" : "false") << ";" + << endl; + + if (poly) + { + os << "typedef " << class_fq_name (*poly_root) << " root_type;"; + + if (poly_derived) + { + os << "typedef " << class_fq_name (*poly_base) << " base_type;" + << "typedef object_traits<root_type>::discriminator_type " << + "discriminator_type;" + << "typedef polymorphic_concrete_info<root_type> info_type;"; + + if (abst) + os << "typedef polymorphic_abstract_info<root_type> " << + "abstract_info_type;"; + + // Calculate our hierarchy depth (number of classes). + // + size_t depth (polymorphic_depth (c)); + + os << endl + << "static const std::size_t depth = " << depth << "UL;"; + } + else + { + semantics::names* hint; + semantics::type& t (utype (*discriminator, hint)); + + os << "typedef " << t.fq_name (hint) << " discriminator_type;" + << "typedef polymorphic_map<object_type> map_type;" + << "typedef polymorphic_concrete_info<object_type> info_type;"; + + if (abst) + os << "typedef polymorphic_abstract_info<object_type> " << + "abstract_info_type;"; + + os << endl + << "static const std::size_t depth = 1UL;"; + } + + os << endl; + } + + // id_type, version_type, etc. + // + if (id != 0) + { + if (base_id) + { + semantics::class_& b ( + dynamic_cast<semantics::class_&> (id->scope ())); + string const& type (class_fq_name (b)); + + os << "typedef object_traits< " << type << " >::id_type id_type;"; + + if (optimistic != 0) + os << "typedef object_traits< " << type << " >::version_type " << + "version_type;"; + + os << endl; + + if (poly_derived) + os << "static const bool auto_id = false;"; + else + os << "static const bool auto_id = object_traits< " << type << + " >::auto_id;"; + } + else + { + { + semantics::names* hint; + semantics::type& t (utype (*id, hint)); + os << "typedef " << t.fq_name (hint) << " id_type;"; + } + + if (optimistic != 0) + { + semantics::names* hint; + semantics::type& t (utype (*optimistic, hint)); + os << "typedef " << t.fq_name (hint) << " version_type;"; + } + + os << endl + << "static const bool auto_id = " << (auto_id ? "true;" : "false;"); + } + + os << endl; + } + else if (!reuse_abst) + { + // Object without id. + // + os << "typedef void id_type;" + << endl + << "static const bool auto_id = false;" + << endl; + } + + // abstract + // + os << "static const bool abstract = " << (abst ? "true" : "false") << ";" + << endl; + + // id () + // + if (id != 0 || !reuse_abst) + { + // We want to generate a dummy void id() accessor even if this + // object has no id to help us in the runtime. This way we can + // write generic code that will work for both void and non-void + // ids. + // + os << "static id_type" << endl + << "id (const object_type&);" + << endl; + } + + if (!reuse_abst) + { + // Cache traits typedefs. + // + if (id == 0) + { + os << "typedef" << endl + << "no_id_pointer_cache_traits<pointer_type>" << endl + << "pointer_cache_traits;" + << endl + << "typedef" << endl + << "no_id_reference_cache_traits<object_type>" << endl + << "reference_cache_traits;" + << endl; + } + else + { + char const* p (session (c) ? "odb::" : "no_op_"); + + if (poly_derived) + { + os << "typedef" << endl + << p << "pointer_cache_traits<" << + "object_traits<root_type>::pointer_type>" << endl + << "pointer_cache_traits;" + << endl + << "typedef" << endl + << p << "reference_cache_traits<root_type>" << endl + << "reference_cache_traits;" + << endl; + } + else + { + os << "typedef" << endl + << p << "pointer_cache_traits<pointer_type>" << endl + << "pointer_cache_traits;" + << endl + << "typedef" << endl + << p << "reference_cache_traits<object_type>" << endl + << "reference_cache_traits;" + << endl; + } + } + + // callback () + // + os << "static void" << endl + << "callback (database&, object_type&, callback_event);" + << endl; + + os << "static void" << endl + << "callback (database&, const object_type&, callback_event);" + << endl; + } + + os << "};"; +} + +void header::class_:: +traverse_view (type& c) +{ + string const& type (class_fq_name (c)); + + os << "// " << class_name (c) << endl + << "//" << endl; + + // class_traits + // + os << "template <>" << endl + << "struct class_traits< " << type << " >" + << "{" + << "static const class_kind kind = class_view;" + << "};"; + + // view_traits + // + os << "template <>" << endl + << "class access::view_traits< " << type << " >" + << "{" + << "public:" << endl; + + // view_type & pointer_type + // + os << "typedef " << type << " view_type;" + << "typedef " << c.get<string> ("object-pointer") << " pointer_type;" + << endl; + + // callback () + // + os << "static void" << endl + << "callback (database&, view_type&, callback_event);" + << endl; + + os << "};"; +} + +namespace header +{ void generate () { @@ -78,6 +369,34 @@ namespace header os << "#include <odb/view-result.hxx>" << endl; } - os << endl; + os << endl + << "#include <odb/details/unused.hxx>" << endl + << endl; + + // Generate common code. + // + traversal::unit unit; + traversal::defines unit_defines; + typedefs unit_typedefs (false); + traversal::namespace_ ns; + class_ c; + + unit >> unit_defines >> ns; + unit_defines >> c; + unit >> unit_typedefs >> c; + + traversal::defines ns_defines; + typedefs ns_typedefs (false); + + ns >> ns_defines >> ns; + ns_defines >> c; + ns >> ns_typedefs >> c; + + os << "namespace odb" + << "{"; + + unit.dispatch (ctx.unit); + + os << "}"; } } |