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/*
* Copyright (C) 2005 Tommi Maekitalo
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* As a special exception, you may use this file as part of a free
* software library without restriction. Specifically, if other files
* instantiate templates or use macros or inline functions from this
* file, or you compile this file and link it with other files to
* produce an executable, this file does not by itself cause the
* resulting executable to be covered by the GNU General Public
* License. This exception does not however invalidate any other
* reasons why the executable file might be covered by the GNU Library
* General Public License.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef TNT_SCOPE_H
#define TNT_SCOPE_H
#include <map>
#include <string>
#include <tnt/object.h>
#include <cxxtools/mutex.h>
#include <cxxtools/refcounted.h>
namespace tnt
{
template <typename objectType>
class NullDestroyPolicy
{
public:
static void destroy(objectType*) { }
};
class Scope : public cxxtools::AtomicRefCounted
{
public:
typedef Object::pointer_type pointer_type;
private:
typedef std::map<std::string, pointer_type> container_type;
container_type _data;
mutable cxxtools::Mutex _mutex;
void privatePut(const std::string& key, pointer_type o);
// non-copyable
Scope(const Scope&);
Scope& operator=(const Scope&);
public:
Scope();
virtual ~Scope();
void lock() { _mutex.lock(); }
void unlock() { _mutex.unlock(); }
bool has(const std::string& key) const
{ return _data.find(key) != _data.end(); }
template <typename T> T*
get(const std::string& key)
{
container_type::iterator it = _data.find(key);
return it == _data.end() ? 0 : it->second->cast<T>();
}
/// Put new Object in scope. If key already exists,
/// it is replaced and old Object released.
template <typename T, template <class> class destroyPolicy>
void put(const std::string& key, T* o)
{
try
{
tnt::PointerObject<T, destroyPolicy>* ptr = new tnt::PointerObject<T, destroyPolicy>(o);
privatePut(key, ptr);
}
catch (const std::bad_alloc&)
{
destroyPolicy<T>::destroy(o);
throw;
}
}
template <typename T>
void put(const std::string& key, T* o)
{ put<T, cxxtools::DeletePolicy>(key, o); }
template <typename T>
void put(const std::string& key, T* o, bool transferOwnership)
{
if (transferOwnership)
put<T, cxxtools::DeletePolicy>(key, o);
else
put<T, NullDestroyPolicy>(key, o);
}
void erase(const std::string& key) { _data.erase(key); }
bool empty() const { return _data.empty(); }
void clear() { _data.clear(); }
typedef container_type::const_iterator const_iterator;
typedef container_type::iterator iterator;
typedef container_type::value_type value_type;
const_iterator begin() const { return _data.begin(); }
const_iterator end() const { return _data.end(); }
iterator begin() { return _data.begin(); }
iterator end() { return _data.end(); }
};
}
#endif // TNT_SCOPE_H
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