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/****************************************************************************
* Copyright (C) 2009-2016 EPAM Systems
*
* This file is part of Indigo toolkit.
*
* This file may be distributed and/or modified under the terms of the
* GNU General Public License version 3 as published by the Free Software
* Foundation and appearing in the file LICENSE.GPL included in the
* packaging of this file.
*
* This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
* WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
***************************************************************************/
#ifndef __multimap__
#define __multimap__
#include "base_cpp/red_black.h"
namespace indigo {
DECL_EXCEPTION(MultiMapError);
template <typename K, typename V> class MultiMap : public NonCopyable {
public:
DECL_TPL_ERROR(MultiMapError);
explicit MultiMap() {}
~MultiMap() {}
const RedBlackSet<K>& keys() const;
const RedBlackSet<V>& get(const K &k) const;
const RedBlackSet<V>& operator[](const K &k) const;
int size() const;
bool find(const K &k, const V &v) const;
void insert(const K &k, const V &v);
void insert(const K &k, const Array<V> &vs);
void insert(const K &k, const RedBlackSet<V> &vs);
bool remove(const K &k);
bool remove(const K &k, const V &v);
void invert(MultiMap<V, K> &target) const;
void copy(MultiMap<K, V> &target) const;
void clear();
protected:
RedBlackSet<V>& _provide_set(const K &k);
template <typename L, typename R>
void _copy(MultiMap<L, R> &target, bool invert) const
{
for (auto i = _map.begin(); i != _map.end(); i = _map.next(i)) {
const RedBlackSet<V> &set = *_sets[_map.value(i)];
for (auto j = set.begin(); j != set.end(); j = set.next(j)) {
K &k = _map.key(i);
V &v = set.key(j);
if (invert) {
target.insert(v, k);
} else {
target.insert(k, v);
}
}
}
}
RedBlackMap<K, int> _map;
RedBlackSet<K> _keys;
PtrArray<RedBlackSet<V>> _sets;
const RedBlackSet<V> _nil;
};
}
#ifdef _DEBUG
#include "assert.h"
#define CHECK_KEYS assert(_map.size() == _keys.size());
#else
#define CHECK_KEYS
#endif
using namespace indigo;
template <typename K, typename V>
bool MultiMap<K, V>::find(const K &k, const V &v) const
{
return get(k).find(v);
}
template <typename K, typename V>
const RedBlackSet<V>& MultiMap<K, V>::get(const K &k) const
{
int *i = _map.at2(k);
if (i) { return *_sets[*i]; }
return _nil;
}
template <typename K, typename V>
void MultiMap<K, V>::insert(const K &k, const V &v)
{
_provide_set(k).insert(v);
}
template <typename K, typename V>
void MultiMap<K, V>::insert(const K &k, const Array<V> &vs)
{
RedBlackSet<V> &set = _provide_set(k);
for (auto i = 0; i < vs.size(); i++) {
set.insert(vs[i]);
}
}
template <typename K, typename V>
void MultiMap<K, V>::insert(const K &k, const RedBlackSet<V> &vs)
{
RedBlackSet<V> &set = _provide_set(k);
for (auto i = vs.begin(); i != vs.end(); i = vs.next(i)) {
set.insert(vs.key(i));
}
}
template <typename K, typename V>
bool MultiMap<K, V>::remove(const K &k)
{
int *i = _map.at2(k);
if (!i) { return false; }
_sets.remove(*i);
_keys.remove(k);
_map.remove(k);
CHECK_KEYS;
return true;
}
template <typename K, typename V>
bool MultiMap<K, V>::remove(const K &k, const V &v)
{
int *i = _map.at2(k);
if (!i) { return false; }
RedBlackSet<V> &set = *_sets[*i];
set.remove(v);
if (set.size() < 1) {
_sets.remove(*i);
_keys.remove(k);
_map.remove(k);
}
CHECK_KEYS;
return true;
}
template <typename K, typename V>
void MultiMap<K, V>::copy(MultiMap<K, V> &target) const
{
_copy(target, false);
}
template <typename K, typename V>
void MultiMap<K, V>::invert(MultiMap<V, K> &target) const
{
_copy(target, true);
}
template <typename K, typename V>
void MultiMap<K, V>::clear()
{
_map.clear();
_keys.clear();
_sets.clear();
}
template <typename K, typename V>
const RedBlackSet<K>& MultiMap<K, V>::keys() const
{
return _keys;
}
template <typename K, typename V>
int MultiMap<K, V>::size() const
{
return _map.size();
}
template <typename K, typename V>
const RedBlackSet<V>& MultiMap<K, V>::operator[](const K &k) const
{
return get(k);
}
template <typename K, typename V>
RedBlackSet<V>& MultiMap<K, V>::_provide_set(const K &k)
{
int *i = _map.at2(k);
if (i) { return *_sets[*i]; }
_keys.insert(k);
_map.insert(k, _sets.size());
CHECK_KEYS;
return _sets.add(new RedBlackSet<V>());
}
#endif
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