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mirror of https://github.com/OpenNebula/one.git synced 2024-12-22 13:33:52 +03:00
one/include/EnumString.h
Tino Vázquez 05d147c524
M #-: Bump version 6.10.0
Also bump copyright year to 2024
2024-07-29 14:27:11 +02:00

82 lines
2.6 KiB
C++

/* -------------------------------------------------------------------------- */
/* Copyright 2002-2024, OpenNebula Project, OpenNebula Systems */
/* */
/* Licensed under the Apache License, Version 2.0 (the "License"); you may */
/* not use this file except in compliance with the License. You may obtain */
/* a copy of the License at */
/* */
/* http://www.apache.org/licenses/LICENSE-2.0 */
/* */
/* Unless required by applicable law or agreed to in writing, software */
/* distributed under the License is distributed on an "AS IS" BASIS, */
/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. */
/* See the License for the specific language governing permissions and */
/* limitations under the License. */
/* -------------------------------------------------------------------------- */
#ifndef ENUM_STRING_H
#define ENUM_STRING_H
#include <map>
#include <algorithm>
#include <assert.h>
#include <typeinfo>
#include <sstream>
/**
* Converts string to enum and back
*/
template <typename T>
class EString
{
public:
/**
* Constructor
* @param _em map with string associations
* @param check_sanity check that all enums have a string representation
* Works only for continuous enums starting with zero
* Last enum must be ENUM_MAX
*/
EString(const std::map<std::string, T>&& _em, bool check_sanity = true)
: enum_map(_em)
{
if (check_sanity && (int)T::ENUM_MAX != enum_map.size())
{
std::ostringstream oss;
oss << " EString: Not all strings defined for enum "
<< typeid(T).name();
throw std::runtime_error(oss.str());
}
}
T _from_str(const std::string& sv) const
{
const auto it = enum_map.find(sv);
if ( it == enum_map.end() )
{
return T::UNDEFINED;
}
return it->second;
}
const std::string& _to_str(T ev) const
{
const auto it = std::find_if(enum_map.begin(), enum_map.end(),
[ev](const std::pair<std::string, T> & t) -> bool
{
return t.second == ev;
});
return it->first;
}
private:
const std::map<std::string, T> enum_map;
};
#endif /*ENUM_STRING_H*/