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OrderedMap.hpp
/*
Copyright 2014 Statoil ASA.
This file is part of the Open Porous Media project (OPM).
OPM 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.
OPM 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 OPM. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef OPM_ORDERED_MAP_HPP
#define OPM_ORDERED_MAP_HPP
#include <algorithm>
#include <cctype>
#include <cstddef>
#include <functional>
#include <iterator>
#include <set>
#include <stdexcept>
#include <string>
#include <string_view>
#include <unordered_map>
#include <utility>
#include <vector>
namespace Opm {
namespace OrderedMapDetail {
template<class T, class A>
std::string
findSimilarStrings(std::string str,
const std::vector<std::pair<std::string, T>,A>& storage)
{
auto toUpper = [](const char c){ return std::toupper(c);};
std::transform(str.begin(), str.end(), str.begin(), toUpper);
std::set<std::string> alternatives;
for(const auto& entry: storage)
{
std::string upper = entry.first;
std::transform(upper.begin(), upper.end(), upper.begin(),
toUpper);
if(upper.find(str) != std::string::npos || str.find(upper) != std::string::npos)
{
alternatives.insert(entry.first);
}
}
if (alternatives.empty())
{
return {};
}
std::string concatedStr;
for (const auto& alt : alternatives) {
concatedStr += alt;
concatedStr += ", ";
}
return concatedStr.substr(0, concatedStr.size()-2);
}
template<std::string_view::size_type MAX_CHARS>
class TruncatedStringHash
{
public:
std::size_t operator()(std::string_view key) const
{
return hasher(key.substr(0, MAX_CHARS));
}
private:
std::hash<std::string_view> hasher;
};
template<>
class TruncatedStringHash<std::string_view::npos> : public std::hash<std::string_view>
{};
template<std::string_view::size_type MAX_CHARS>
struct TruncatedStringEquals
{
bool operator()(std::string_view str1, std::string_view str2) const
{
return str1.substr(0, MAX_CHARS) == str2.substr(0, MAX_CHARS);
}
};
template<>
struct TruncatedStringEquals<std::string::npos> : public std::equal_to<std::string>
{};
} // end namespace OrderedMapDetail
template <typename T, std::string_view::size_type MAX_CHARS = std::string_view::npos>
class OrderedMap {
public:
using storage_type = std::vector<std::pair<std::string, T>>;
using index_type = std::unordered_map<std::string, typename storage_type::size_type,
OrderedMapDetail::TruncatedStringHash<MAX_CHARS>,
OrderedMapDetail::TruncatedStringEquals<MAX_CHARS>>;
using iter_type = typename storage_type::iterator;
using const_iter_type = typename storage_type::const_iterator;
private:
index_type m_map;
storage_type m_vector;
public:
OrderedMap() = default;
OrderedMap(const index_type& index, const storage_type& storage)
: m_map(index)
, m_vector(storage)
{
}
const index_type& getIndex() const { return m_map; }
const storage_type& getStorage() const { return m_vector; }
std::size_t count(const std::string& key) const {
return this->m_map.count(key);
}
T& operator[](const std::string& key) {
if (this->count(key) == 0)
this->insert( std::make_pair(key, T()));
return this->at(key);
}
std::size_t erase(const std::string& key) {
if (this->count(key) == 0)
return 0;
const std::size_t idx = this->m_map.at(key);
this->m_map.erase(key);
this->m_vector.erase(this->m_vector.begin() + idx);
for (const auto& index_pair : this->m_map) {
auto target_index = index_pair.second;
if (target_index > idx) {
--target_index;
}
this->m_map[index_pair.first] = target_index;
}
return 1;
}
void insert(std::pair<std::string,T> key_value_pair) {
if (this->count(key_value_pair.first) > 0) {
auto iter = m_map.find( key_value_pair.first );
const std::size_t idx = iter->second;
m_vector[idx] = key_value_pair;
} else {
const std::size_t idx = m_vector.size();
this->m_map.emplace(key_value_pair.first, idx);
this->m_vector.push_back(std::move(key_value_pair));
}
}
T& get(const std::string& key) {
auto iter = m_map.find( key );
if (iter == m_map.end())
{
using namespace std::string_literals;
auto startsWithSame = OrderedMapDetail::findSimilarStrings(key, m_vector);
if (!startsWithSame.empty())
{
startsWithSame = " Similar entries are "s +
startsWithSame + "."s;
}
throw std::invalid_argument("Key "s + key + " not found."s
+ startsWithSame);
}
else {
const std::size_t idx = iter->second;
return iget(idx);
}
}
T& iget(std::size_t index) {
if (index >= m_vector.size())
throw std::invalid_argument("Invalid index");
return m_vector[index].second;
}
const T& get(const std::string& key) const {
const auto& iter = this->m_map.find( key );
if (iter == m_map.end())
{
auto startsWithSame = OrderedMapDetail::findSimilarStrings(key, m_vector);
if (!startsWithSame.empty())
{
startsWithSame = std::string(" Similar entries are ") +
startsWithSame + std::string(".");
}
using namespace std::string_literals;
throw std::invalid_argument("Key "s + key + " not found."s
+ startsWithSame);
}
else {
const std::size_t idx = iter->second;
return iget(idx);
}
}
const T& iget(std::size_t index) const {
if (index >= m_vector.size())
{
using namespace std::string_literals;
throw std::invalid_argument("Invalid index "s +
std::to_string(index) +
" is larger than container size"s);
}
return m_vector[index].second;
}
const T& at(std::size_t index) const {
return this->iget(index);
}
const T& at(const std::string& key) const {
return this->get(key);
}
T& at(std::size_t index) {
return this->iget(index);
}
T& at(const std::string& key) {
return this->get(key);
}
std::size_t size() const {
return m_vector.size();
}
const_iter_type begin() const {
return m_vector.begin();
}
const_iter_type end() const {
return m_vector.end();
}
iter_type begin() {
return m_vector.begin();
}
iter_type end() {
return m_vector.end();
}
iter_type find(const std::string& key) {
const auto map_iter = this->m_map.find(key);
if (map_iter == this->m_map.end())
return this->m_vector.end();
return std::next(this->m_vector.begin(), map_iter->second);
}
const_iter_type find(const std::string& key) const {
const auto map_iter = this->m_map.find(key);
if (map_iter == this->m_map.end())
return this->m_vector.end();
return std::next(this->m_vector.begin(), map_iter->second);
}
template<std::size_t n>
bool operator==(const OrderedMap<T,n>& data) const {
return this->getIndex() == data.getIndex() &&
this->getStorage() == data.getStorage();
}
template<class Serializer>
void serializeOp(Serializer& serializer)
{
serializer(m_map);
serializer(m_vector);
}
};
}
#endif
Opm::OrderedMapDetail::TruncatedStringHash
Definition OrderedMap.hpp:76
Opm::Serializer
Class for (de-)serializing.
Definition Serializer.hpp:94
Opm
This class implements a small container which holds the transmissibility mulitpliers for all the face...
Definition Exceptions.hpp:30
Opm::OrderedMapDetail::TruncatedStringEquals
Definition OrderedMap.hpp:93