Desktop Qt based XMPP messenger https://macaw.me
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/*
* Squawk messenger.
* Copyright (C) 2019 Yury Gubich <blue@macaw.me>
*
* 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 ORDER_H
#define ORDER_H
#include <map>
#include <list>
#include "exception.h"
namespace W
{
template <typename data_type, typename comparator = std::less<data_type>>
class Order
{
public:
class Duplicates:
public Utils::Exception
{
public:
Duplicates():Exception(){}
std::string getMessage() const{return "Inserting element duplicates existing";}
};
class NotFound:
public Utils::Exception
{
public:
NotFound():Exception(){}
std::string getMessage() const{return "Erasing element haven't been found";}
};
protected:
typedef std::list<data_type> List;
public:
typedef typename List::size_type size_type;
typedef typename List::const_iterator const_iterator;
typedef typename List::iterator iterator;
protected:
typedef std::map<data_type, const_iterator, comparator> Map;
typedef typename Map::const_iterator m_const_itr;
typedef typename Map::iterator m_itr;
public:
Order():
order(),
r_map()
{}
~Order() {};
size_type size() const {
return order.size();
}
void push_back(data_type element) {
m_const_itr m_itr = r_map.find(element);
if (m_itr != r_map.end()) {
throw Duplicates();
}
const_iterator itr = order.insert(order.end(), element);
r_map.insert(std::make_pair(element, itr));
}
void erase(data_type element) {
m_const_itr itr = r_map.find(element);
if (itr == r_map.end()) {
throw NotFound();
}
order.erase(itr->second);
r_map.erase(itr);
}
void clear() {
order.clear();
r_map.clear();
}
void insert(const_iterator pos, data_type element) {
m_const_itr m_itr = r_map.find(element);
if (m_itr != r_map.end()) {
throw Duplicates();
}
const_iterator itr = order.insert(pos, element);
r_map.insert(std::make_pair(element, itr));
}
void insert(iterator pos, data_type element) {
m_const_itr m_itr = r_map.find(element);
if (m_itr != r_map.end()) {
throw Duplicates();
}
const_iterator itr = order.insert(pos, element);
r_map.insert(std::make_pair(element, itr));
}
const_iterator find(data_type element) const {
m_const_itr itr = r_map.find(element);
if (itr == r_map.end()) {
return end();
} else {
return itr->second;
}
}
const_iterator begin() const {
return order.begin();
}
const_iterator end() const {
return order.end();
}
iterator begin() {
return order.begin();
}
iterator end() {
return order.end();
}
private:
List order;
Map r_map;
};
}
#endif // ORDER_H