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// file : odb/mysql/schema.cxx
// author : Boris Kolpackov <boris@codesynthesis.com>
// copyright : Copyright (c) 2009-2011 Code Synthesis Tools CC
// license : GNU GPL v3; see accompanying LICENSE file
#include <set>
#include <odb/mysql/common.hxx>
#include <odb/mysql/schema.hxx>
using namespace std;
namespace mysql
{
namespace
{
typedef set<string> tables;
struct object_columns: object_columns_base, context
{
object_columns (context& c, string const& prefix = string ())
: object_columns_base (c), context (c), prefix_ (prefix)
{
}
virtual bool
column (semantics::data_member& m, string const& name, bool first)
{
// Ignore inverse object pointers.
//
if (inverse (m))
return false;
if (!first)
os << "," << endl;
os << " `" << name << "` " << column_type (m, prefix_);
if (m.count ("id"))
os << " PRIMARY KEY";
using semantics::class_;
if (class_* c = object_pointer (member_type (m, prefix_)))
{
os << " REFERENCES `" << table_name (*c) << "` (`" <<
column_name (id_member (*c)) << "`)";
}
return true;
}
private:
string prefix_;
};
struct member_create: object_members_base, context
{
member_create (context& c, semantics::class_& object, tables& t)
: object_members_base (c, false, true),
context (c),
object_ (object),
id_member_ (id_member (object)),
tables_ (t)
{
}
virtual void
container (semantics::data_member& m)
{
using semantics::type;
using semantics::data_member;
// Ignore inverse containers of object pointers.
//
if (inverse (m, "value"))
return;
type& t (m.type ());
container_kind_type ck (container_kind (t));
type& vt (container_vt (t));
string const& name (table_name (m, table_prefix_));
if (tables_.count (name))
return;
os << "CREATE TABLE `" << name << "` (" << endl;
// object_id (simple value)
//
string id_name (column_name (m, "id", "object_id"));
os << " `" << id_name << "` " << column_type (id_member_, "ref");
// index (simple value)
//
string index_name;
bool ordered (ck == ck_ordered && !unordered (m));
if (ordered)
{
index_name = column_name (m, "index", "index");
os << "," << endl
<< " `" << index_name << "` " << column_type (m, "index");
}
// key (simple or composite value)
//
if (ck == ck_map || ck == ck_multimap)
{
type& kt (container_kt (t));
os << "," << endl;
if (semantics::class_* ckt = comp_value (kt))
{
object_columns oc (*this);
oc.traverse_composite (m, *ckt, "key", "key");
}
else
{
object_columns oc (*this, "key");
string const& name (column_name (m, "key", "key"));
oc.column (m, name, true);
}
}
// value (simple or composite value)
//
{
os << "," << endl;
if (semantics::class_* cvt = comp_value (vt))
{
object_columns oc (*this);
oc.traverse_composite (m, *cvt, "value", "value");
}
else
{
object_columns oc (*this, "value");
string const& name (column_name (m, "value", "value"));
oc.column (m, name, true);
}
}
// object_id index
//
os << "," << endl
<< " INDEX (`" << id_name << "`)";
// index index
//
if (ordered)
os << "," << endl
<< " INDEX (`" << index_name << "`)";
os << ")";
string const& engine (options.mysql_engine ());
if (engine != "default")
os << endl
<< " ENGINE=" << engine;
os << ";" << endl
<< endl;
tables_.insert (name);
}
private:
semantics::class_& object_;
semantics::data_member& id_member_;
tables& tables_;
};
struct class_create: traversal::class_, context
{
class_create (context& c)
: context (c)
{
}
virtual void
traverse (type& c)
{
if (c.file () != unit.file ())
return;
if (!c.count ("object"))
return;
string const& name (table_name (c));
// If the table with this name was already created, assume the
// user knows what they are doing and skip it.
//
if (tables_.count (name))
return;
os << "CREATE TABLE `" << name << "` (" << endl;
{
object_columns oc (*this);
oc.traverse (c);
}
os << ")";
string const& engine (options.mysql_engine ());
if (engine != "default")
os << endl
<< " ENGINE=" << engine;
os << ";" << endl
<< endl;
// Create tables for members.
//
{
member_create mc (*this, c, tables_);
mc.traverse (c);
}
tables_.insert (name);
}
private:
tables tables_;
};
struct member_drop: object_members_base, context
{
member_drop (context& c, semantics::class_& object, tables& t)
: object_members_base (c, false, true),
context (c),
object_ (object),
tables_ (t)
{
}
virtual void
container (semantics::data_member& m)
{
// Ignore inverse containers of object pointers.
//
if (inverse (m, "value"))
return;
string const& name (table_name (m, table_prefix_));
if (tables_.count (name))
return;
os << "DROP TABLE IF EXISTS `" << name << "`;" << endl;
tables_.insert (name);
}
private:
semantics::class_& object_;
tables& tables_;
};
struct class_drop: traversal::class_, context
{
class_drop (context& c)
: context (c)
{
}
virtual void
traverse (type& c)
{
if (c.file () != unit.file ())
return;
if (!c.count ("object"))
return;
string const& name (table_name (c));
if (tables_.count (name))
return;
os << "DROP TABLE IF EXISTS `" << name << "`;" << endl;
// Drop tables for members.
//
{
member_drop mc (*this, c, tables_);
mc.traverse (c);
}
tables_.insert (name);
}
private:
tables tables_;
};
static char const file_header[] =
"/* This file was generated by ODB, object-relational mapping (ORM)\n"
" * compiler for C++.\n"
" */\n\n";
}
void
generate_schema (context& ctx)
{
ctx.os << file_header;
// Drop.
//
{
traversal::unit unit;
traversal::defines unit_defines;
traversal::namespace_ ns;
class_drop c (ctx);
unit >> unit_defines >> ns;
unit_defines >> c;
traversal::defines ns_defines;
ns >> ns_defines >> ns;
ns_defines >> c;
unit.dispatch (ctx.unit);
}
ctx.os << endl;
// Create.
//
{
traversal::unit unit;
traversal::defines unit_defines;
traversal::namespace_ ns;
class_create c (ctx);
unit >> unit_defines >> ns;
unit_defines >> c;
traversal::defines ns_defines;
ns >> ns_defines >> ns;
ns_defines >> c;
unit.dispatch (ctx.unit);
}
}
}
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