diff options
Diffstat (limited to 'odb/odb/semantics/relational/elements.txx')
| -rw-r--r-- | odb/odb/semantics/relational/elements.txx | 215 |
1 files changed, 215 insertions, 0 deletions
diff --git a/odb/odb/semantics/relational/elements.txx b/odb/odb/semantics/relational/elements.txx new file mode 100644 index 0000000..2362d48 --- /dev/null +++ b/odb/odb/semantics/relational/elements.txx @@ -0,0 +1,215 @@ +// file : odb/semantics/relational/elements.txx +// license : GNU GPL v3; see accompanying LICENSE file + +namespace semantics +{ + namespace relational + { + // nameable + // + template <typename N> + typename nameable<N>::parser_map nameable<N>::parser_map_; + + template <typename N> + template <typename T> + void nameable<N>:: + parser_impl (xml::parser& p, scope_type& s, graph& g) + { + name_type n (p.attribute ("name", name_type ())); + T& x (g.new_node<T> (p, s, g)); + g.new_edge<names_type> (s, x, n); + } + + template <typename N> + nameable<N>:: + nameable (nameable const& n, graph&) + : id_ (n.id_), named_ (0) + { + } + + template <typename N> + nameable<N>:: + nameable (xml::parser&, graph&) + // : id_ (p.attribute<string> ("id")) + : named_ (0) + { + // The name attribute is handled in parser_impl(). + } + + template <typename N> + void nameable<N>:: + serialize_attributes (xml::serializer& s) const + { + // Omit empty names (e.g., a primary key). + // + name_type const& n (name ()); + if (!n.empty ()) + s.attribute ("name", n); + + //s.attribute ("id", id_); + } + + // scope + // + + template <typename N> + template <typename T, typename S> + T* scope<N>:: + lookup (name_type const& name) + { + if (T* r = find<T> (name)) + return r; + + if (scope* b = base ()) + { + if (find<S> (name) == 0) + return b->lookup<T, S> (name); + } + + return 0; + } + + template <typename N> + template <typename T> + T* scope<N>:: + find (name_type const& name) + { + typename names_map::iterator i (names_map_.find (name)); + return i != names_map_.end () + ? dynamic_cast<T*> (&(*i->second)->nameable ()) + : 0; + } + + template <typename N> + typename scope<N>::names_iterator scope<N>:: + find (name_type const& name) + { + typename names_map::iterator i (names_map_.find (name)); + + if (i == names_map_.end ()) + return names_.end (); + else + return i->second; + } + + template <typename N> + typename scope<N>::names_const_iterator scope<N>:: + find (name_type const& name) const + { + typename names_map::const_iterator i (names_map_.find (name)); + + if (i == names_map_.end ()) + return names_.end (); + else + return names_const_iterator (i->second); + } + + template <typename N> + typename scope<N>::names_iterator scope<N>:: + find (names_type const& e) + { + typename names_iterator_map::iterator i (iterator_map_.find (&e)); + return i != iterator_map_.end () ? i->second : names_.end (); + } + + template <typename N> + typename scope<N>::names_const_iterator scope<N>:: + find (names_type const& e) const + { + typename names_iterator_map::const_iterator i (iterator_map_.find (&e)); + return i != iterator_map_.end () ? i->second : names_.end (); + } + + template <typename N> + scope<N>:: + scope (scope const& s, scope* base, graph& g) + : first_key_ (names_.end ()), + first_drop_column_ (names_.end ()), + alters_ (0) + { + // Set the alters edge for lookup. + // + if (base != 0) + g.new_edge<alters> (*this, *base); + + for (names_const_iterator i (s.names_begin ()); + i != s.names_end (); ++i) + { + nameable_type& n (i->nameable ().clone (*this, g)); + g.new_edge<names_type> (*this, n, i->name ()); + } + } + + template <typename N> + scope<N>:: + scope (xml::parser& p, scope* base, graph& g) + : first_key_ (names_.end ()), + first_drop_column_ (names_.end ()), + alters_ (0) + { + // Set the alters edge for lookup. + // + if (base != 0) + g.new_edge<alters> (*this, *base); + + using namespace xml; + p.content (content::complex); + + for (parser::event_type e (p.peek ()); + e == parser::start_element; + e = p.peek ()) + { + typename nameable_type::parser_map::iterator i ( + nameable_type::parser_map_.find (p.name ())); + + if (p.namespace_ () != xmlns || i == nameable_type::parser_map_.end ()) + break; // Not one of our elements. + + p.next (); + i->second (p, *this, g); + p.next_expect (parser::end_element); + } + } + + template <typename N> + void scope<N>:: + serialize_content (xml::serializer& s) const + { + for (names_const_iterator i (names_begin ()); i != names_end (); ++i) + i->nameable ().serialize (s); + } + + class column; + class primary_key; + + template <typename N> + void scope<N>:: + add_edge_left (names_type& e) + { + name_type const& name (e.name ()); + + typename names_map::iterator i (names_map_.find (name)); + + if (i == names_map_.end ()) + { + typename names_list::iterator i (names_.insert (names_.end (), &e)); + names_map_[name] = i; + iterator_map_[&e] = i; + } + else + throw duplicate_name (*this, (*i->second)->nameable (), e.nameable ()); + } + + template <typename N> + void scope<N>:: + remove_edge_left (names_type& e) + { + typename names_iterator_map::iterator i (iterator_map_.find (&e)); + assert (i != iterator_map_.end ()); + + names_.erase (i->second); + names_map_.erase (e.name ()); + iterator_map_.erase (i); + } + } +} |