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https://github.com/kiwix/libkiwix.git
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0bd5a5ec3b
While it was "ok" to store raw pointer as, in our use case, the library always live longer than object using it; it is not safe to store raw pointer on object than may be deleted. All classes storing a library now store a shared_ptr. Functionr only using the library (as `HumanReadableNameMapper`) continue to use a (const) reference.
82 lines
2.3 KiB
C++
82 lines
2.3 KiB
C++
/*
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* Copyright 2019 Matthieu Gautier <mgautier@kymeria.fr>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*/
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#ifndef KIWIX_NAMEMAPPER_H
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#define KIWIX_NAMEMAPPER_H
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#include <string>
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#include <map>
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#include <memory>
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#include <mutex>
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namespace kiwix
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{
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class Library;
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class NameMapper {
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public:
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virtual ~NameMapper() = default;
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virtual std::string getNameForId(const std::string& id) const = 0;
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virtual std::string getIdForName(const std::string& name) const = 0;
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};
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class IdNameMapper : public NameMapper {
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public:
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virtual std::string getNameForId(const std::string& id) const { return id; };
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virtual std::string getIdForName(const std::string& name) const { return name; };
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};
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class HumanReadableNameMapper : public NameMapper {
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private:
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std::map<std::string, std::string> m_idToName;
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std::map<std::string, std::string> m_nameToId;
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public:
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HumanReadableNameMapper(const kiwix::Library& library, bool withAlias);
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virtual ~HumanReadableNameMapper() = default;
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virtual std::string getNameForId(const std::string& id) const;
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virtual std::string getIdForName(const std::string& name) const;
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};
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class UpdatableNameMapper : public NameMapper {
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typedef std::shared_ptr<NameMapper> NameMapperHandle;
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public:
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UpdatableNameMapper(std::shared_ptr<Library> library, bool withAlias);
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virtual std::string getNameForId(const std::string& id) const;
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virtual std::string getIdForName(const std::string& name) const;
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void update();
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private:
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NameMapperHandle currentNameMapper() const;
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private:
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mutable std::mutex mutex;
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std::shared_ptr<Library> library;
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NameMapperHandle nameMapper;
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const bool withAlias;
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};
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}
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#endif
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