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// file : odb/header.cxx
// copyright : Copyright (c) 2009-2012 Code Synthesis Tools CC
// license : GNU GPL v3; see accompanying LICENSE file
#include <odb/common.hxx>
#include <odb/context.hxx>
#include <odb/generate.hxx>
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 ()
{
context ctx;
ostream& os (ctx.os);
os << "#include <memory>" << endl
<< "#include <cstddef>" << endl; // std::size_t
if (ctx.features.polymorphic_object)
os << "#include <string>" << endl; // For discriminator.
os << endl;
os << "#include <odb/core.hxx>" << endl
<< "#include <odb/traits.hxx>" << endl
<< "#include <odb/callback.hxx>" << endl
<< "#include <odb/wrapper-traits.hxx>" << endl
<< "#include <odb/pointer-traits.hxx>" << endl;
// In case of a boost TR1 implementation, we cannot distinguish
// between the boost::shared_ptr and std::tr1::shared_ptr usage since
// the latter is just a using-declaration for the former. To resolve
// this we will include TR1 traits if the Boost TR1 header is included.
//
if (ctx.features.tr1_pointer)
{
os << "#include <odb/tr1/wrapper-traits.hxx>" << endl
<< "#include <odb/tr1/pointer-traits.hxx>" << endl;
}
else if (ctx.features.boost_pointer)
{
os << "#ifdef BOOST_TR1_MEMORY_HPP_INCLUDED" << endl
<< "# include <odb/tr1/wrapper-traits.hxx>" << endl
<< "# include <odb/tr1/pointer-traits.hxx>" << endl
<< "#endif" << endl;
}
os << "#include <odb/container-traits.hxx>" << endl;
if (ctx.features.session_object)
os << "#include <odb/cache-traits.hxx>" << endl;
else
os << "#include <odb/no-op-cache-traits.hxx>" << endl;
if (ctx.features.polymorphic_object)
os << "#include <odb/polymorphic-info.hxx>" << endl;
if (ctx.options.generate_query ())
{
if (ctx.options.generate_prepared ())
os << "#include <odb/prepared-query.hxx>" << endl;
os << "#include <odb/result.hxx>" << endl;
if (ctx.features.simple_object)
os << "#include <odb/simple-object-result.hxx>" << endl;
if (ctx.features.polymorphic_object)
os << "#include <odb/polymorphic-object-result.hxx>" << endl;
if (ctx.features.no_id_object)
os << "#include <odb/no-id-object-result.hxx>" << endl;
if (ctx.features.view)
os << "#include <odb/view-result.hxx>" << 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 << "}";
}
}
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