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/***************************************************************************
* Copyright (C) 2005 by Joris Guisson *
* joris.guisson@gmail.com *
* *
* 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 BTPTRMAP_H
#define BTPTRMAP_H
#include <map>
namespace bt
{
/**
* @author Joris Guisson
* @brief Map of pointers
*
* A Map where the data is a pointer. The PtrMap has an autodeletion feature.
* When autodelete is on, every time we remove something from the map, the data
* will be deleted.
*/
template <class Key,class Data>
class PtrMap
{
bool autodel;
std::map<Key,Data*> pmap;
public:
/**
* Constructor.
* @param auto_del Wether or not to enable auto deletion
*/
PtrMap(bool autodel = false) : autodel(autodel)
{}
/**
* Destructor. Will delete all objects, if auto deletion is on.
*/
virtual ~PtrMap()
{
clear();
}
/**
* Return the number of key data pairs in the map.
*/
unsigned int count() const {return pmap.size();}
/**
* Enable or disable auto deletion.
* @param yes Enable if true, disable if false
*/
void setAutoDelete(bool yes)
{
autodel = yes;
}
typedef typename std::map<Key,Data*>::iterator iterator;
typedef typename std::map<Key,Data*>::const_iterator const_iterator;
iterator begin() {return pmap.begin();}
iterator end() {return pmap.end();}
const_iterator begin() const {return pmap.begin();}
const_iterator end() const {return pmap.end();}
/**
* Remove all objects, will delete them if autodelete is on.
*/
void clear()
{
if (autodel)
{
for (iterator i = pmap.begin();i != pmap.end();i++)
{
delete i->second;
i->second = 0;
}
}
pmap.clear();
}
/**
* Insert a key data pair.
* @param k The key
* @param d The data
* @param overwrite Wether or not to overwrite
* @return true if the insertion took place
*/
bool insert(const Key & k,Data* d,bool overwrite = true)
{
iterator itr = pmap.find(k);
if (itr != pmap.end())
{
if (overwrite)
{
if (autodel)
delete itr->second;
itr->second = d;
return true;
}
else
{
return false;
}
}
else
{
pmap[k] = d;
return true;
}
}
/**
* Find a key in the map and returns it's data.
* @param k The key
* @return The data of the key, 0 if the key isn't in the map
*/
Data* find(const Key & k)
{
iterator i = pmap.find(k);
return (i == pmap.end()) ? 0 : i->second;
}
/**
* Find a key in the map and returns it's data.
* @param k The key
* @return The data of the key, 0 if the key isn't in the map
*/
const Data* find(const Key & k) const
{
const_iterator i = pmap.find(k);
return (i == pmap.end()) ? 0 : i->second;
}
/**
* Check to see if a key is in the map.
* @param k The key
* @return true if it is part of the map
*/
bool contains(const Key & k) const
{
const_iterator i = pmap.find(k);
return i != pmap.end();
}
/**
* Erase a key from the map. Will delete
* the data if autodelete is on.
* @param key The key
* @return true if an erase took place
*/
bool erase(const Key & key)
{
iterator i = pmap.find(key);
if (i == pmap.end())
return false;
if (autodel)
delete i->second;
pmap.erase(i);
return true;
}
};
}
#endif
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