mirror of
https://github.com/MariaDB/server.git
synced 2025-01-23 15:24:16 +01:00
113 lines
3.2 KiB
C++
113 lines
3.2 KiB
C++
/* factory.hpp
|
|
*
|
|
* Copyright (C) 2003 Sawtooth Consulting Ltd.
|
|
*
|
|
* This file is part of yaSSL.
|
|
*
|
|
* yaSSL is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* There are special exceptions to the terms and conditions of the GPL as it
|
|
* is applied to yaSSL. View the full text of the exception in the file
|
|
* FLOSS-EXCEPTIONS in the directory of this software distribution.
|
|
*
|
|
* yaSSL is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
|
|
*/
|
|
|
|
/* The factory header defines an Object Factory, used by SSL message and
|
|
* handshake types.
|
|
*
|
|
* See Desgin Pattern in GoF and Alexandrescu's chapter in Modern C++ Design,
|
|
* page 208
|
|
*/
|
|
|
|
|
|
|
|
#ifndef yaSSL_FACTORY_HPP
|
|
#define yaSSL_FACTORY_HPP
|
|
|
|
#include STL_VECTOR_FILE
|
|
#include STL_PAIR_FILE
|
|
|
|
|
|
namespace STL = STL_NAMESPACE;
|
|
|
|
|
|
// VC60 workaround: it doesn't allow typename in some places
|
|
#if defined(_MSC_VER) && (_MSC_VER < 1300)
|
|
#define CPP_TYPENAME
|
|
#else
|
|
#define CPP_TYPENAME typename
|
|
#endif
|
|
|
|
|
|
namespace yaSSL {
|
|
|
|
|
|
// Factory uses its callback map to create objects by id,
|
|
// returning an abstract base pointer
|
|
template<class AbstractProduct,
|
|
typename IdentifierType = int,
|
|
typename ProductCreator = AbstractProduct* (*)()
|
|
>
|
|
class Factory {
|
|
typedef STL::pair<IdentifierType, ProductCreator> CallBack;
|
|
typedef STL::vector<CallBack> CallBackVector;
|
|
|
|
CallBackVector callbacks_;
|
|
public:
|
|
// pass function pointer to register all callbacks upon creation
|
|
explicit Factory(void (*init)(Factory<AbstractProduct, IdentifierType,
|
|
ProductCreator>&))
|
|
{
|
|
init(*this);
|
|
}
|
|
|
|
// reserve place in vector before registering, used by init funcion
|
|
void Reserve(size_t sz)
|
|
{
|
|
callbacks_.reserve(sz);
|
|
}
|
|
|
|
// register callback
|
|
void Register(const IdentifierType& id, ProductCreator pc)
|
|
{
|
|
callbacks_.push_back(STL::make_pair(id, pc));
|
|
}
|
|
|
|
// THE Creator, returns a new object of the proper type or 0
|
|
AbstractProduct* CreateObject(const IdentifierType& id) const
|
|
{
|
|
typedef typename STL::vector<CallBack>::const_iterator cIter;
|
|
|
|
cIter first = callbacks_.begin();
|
|
cIter last = callbacks_.end();
|
|
|
|
while (first != last) {
|
|
if (first->first == id)
|
|
break;
|
|
++first;
|
|
}
|
|
|
|
if (first == callbacks_.end())
|
|
return 0;
|
|
return (first->second)();
|
|
}
|
|
private:
|
|
Factory(const Factory&); // hide copy
|
|
Factory& operator=(const Factory&); // and assign
|
|
};
|
|
|
|
|
|
} // naemspace
|
|
|
|
#endif // yaSSL_FACTORY_HPP
|