qd_object_map_container.h

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 *
 */

#ifndef QDENGINE_QDCORE_QD_OBJECT_MAP_CONTAINER_H
#define QDENGINE_QDCORE_QD_OBJECT_MAP_CONTAINER_H

#include "common/system.h"

#include "qdengine/qdengine.h"


namespace QDEngine {

template <class T>
class qdObjectMapContainer {
public:
    typedef Std::list<T *> object_list_t;

    qdObjectMapContainer();
    ~qdObjectMapContainer();

    const object_list_t &get_list() const {
        return _object_list;
    }

    T *get_object(const char *name);
    const T *get_object(const char *name) const;

    bool add_object(T *p);
    bool remove_object(T *p);
    bool rename_object(T *p, const char *name);
    bool remove_object(const char *name);
    bool is_in_list(const char *name) const {
        return (get_object(name) != 0);
    }
    bool is_in_list(const T *p) const {
        return (get_object(p->name()) != 0);
    }
    bool clear();

private:

    typedef Common::HashMap<Common::String, T *> object_map_t;

    object_list_t _object_list;
    object_map_t _object_map;
};

template <class T>
bool qdObjectMapContainer<T>::add_object(T *p) {
    typename object_map_t::iterator it = _object_map.find(p->name());
    if (it != _object_map.end())
        return false;

    _object_map[p->name()] = p;
    _object_list.push_back(p);

    return true;
}

template <class T>
const T *qdObjectMapContainer<T>::get_object(const char *name) const {

    typename object_map_t::const_iterator it = _object_map.find(name);
    if (it != _object_map.end())
        return it->_value;

    return NULL;
}

template <class T>
T *qdObjectMapContainer<T>::get_object(const char *name) {
    typename object_map_t::iterator it = _object_map.find(name);
    if (it != _object_map.end())
        return it->_value;

    return NULL;
}

template <class T>
bool qdObjectMapContainer<T>::remove_object(T *p) {
    typename object_list_t::iterator it;
    for (it = _object_list.begin(); it != _object_list.end(); it++) {
        if (*it == p) {
            _object_list.erase(it);
            typename object_map_t::iterator im = _object_map.find(p->name());
            if (im != _object_map.end())
                _object_map.erase(im);

            return true;
        }
    }

    return false;
}

template <class T>
bool qdObjectMapContainer<T>::remove_object(const char *name) {
    T *p = get_object(name);
    if (!p) return false;

    return remove_object(p);
}

template <class T>
bool qdObjectMapContainer<T>::rename_object(T *p, const char *name) {
    typename object_map_t::iterator im = _object_map.find(p->name());
    if (im != _object_map.end()) {
        _object_map.erase(im);
        p->set_name(name);
        _object_map[p->name()] = p;

        return true;
    }
    return false;
}

template <class T>
qdObjectMapContainer<T>::qdObjectMapContainer() {
}

template <class T>
qdObjectMapContainer<T>::~qdObjectMapContainer() {
    clear();
}

template <class T>
bool qdObjectMapContainer<T>::clear() {
    _object_map.clear();

    for (typename object_list_t::iterator it = _object_list.begin(); it != _object_list.end(); ++it)
        delete *it;

    _object_list.clear();

    return true;
}

} // namespace QDEngine

#endif // QDENGINE_QDCORE_QD_OBJECT_MAP_CONTAINER_H