89 lines
2.2 KiB
C++
89 lines
2.2 KiB
C++
// Squawk messenger.
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// Copyright (C) 2019 Yury Gubich <blue@macaw.me>
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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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// (at your option) 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, see <http://www.gnu.org/licenses/>.
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#ifndef CORE_DATABASE_H
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#define CORE_DATABASE_H
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#include <map>
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#include <string>
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#include <QString>
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#include <QStandardPaths>
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#include <QDir>
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#include <lmdb.h>
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class DataBase
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{
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class _Table;
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template<class T>
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class Serializer;
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public:
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template <class K, class V>
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class Table;
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DataBase(const QString& name, uint16_t mapSize = 10);
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~DataBase();
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void open();
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void close();
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bool ready() const;
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bool removeDirectory();
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QString getName() const;
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void drop();
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template <class K, class V>
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Table<K, V>* addTable(const std::string& name);
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template <class K, class V>
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Table<K, V>* getTable(const std::string& name);
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public:
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//exceptions
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class Exception;
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class Directory;
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class Closed;
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class Opened;
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class NotFound;
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class Exist;
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class Unknown;
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private:
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std::string name;
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bool opened;
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uint16_t size;
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MDB_env* environment;
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std::map<std::string, _Table*> tables;
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};
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#include "exceptions.h"
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template <class K, class V>
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DataBase::Table<K, V>* DataBase::addTable(const std::string& p_name) {
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if (opened) {
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throw Opened(name, "add table " + p_name);
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}
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DataBase::Table<K, V>* table = new DataBase::Table<K, V>(p_name, this);
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tables.insert(std::make_pair(p_name, (_Table*)table));
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return table;
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}
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template <class K, class V>
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DataBase::Table<K, V>* DataBase::getTable(const std::string& p_name) {
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return static_cast<DataBase::Table<K, V>*>(tables.at(p_name));
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}
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#endif // CORE_DATABASE_H
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