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// Copyright (C) 2008 Lukas Lalinsky
//
// This program 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.
//
// This program 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.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#ifndef FACTORY_H
#define FACTORY_H
#include <QMap>
#include <QStringList>
#include "singelton.h"
template <typename TI>
class FactoryHelperBase
{
public:
virtual TI *create() = 0;
};
template <typename TI, typename ST>
class FactoryHelper : public FactoryHelperBase<TI>
{
public:
TI *create()
{
return new ST();
}
};
template <typename T, typename TI, typename Helper>
class Factory : public Singelton<T>
{
public:
static TI *create(const QString &key)
{
T *inst = T::instance();
if (!inst->m_map.contains(key))
return NULL;
return inst->m_map[key].create();
}
static QStringList keys()
{
T *inst = T::instance();
return inst->m_map.keys();
}
protected:
template <typename ST> void add() { m_map[ST::staticTypeName()] = Helper<TI, ST>(); }
typedef TI *(*CreateFunc)();
QMap<QString, FactoryHelperBase> m_map;
};
#define FACTORY_ADD_TYPE(ST) add<ST>();
#endif
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