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103 lines
2.6 KiB
C++
103 lines
2.6 KiB
C++
// This file is part of Glest <https://github.com/Glest>
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//
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// Copyright (C) 2018 The Glest team
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//
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// Glest is a fork of MegaGlest <https://megaglest.org/>
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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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// 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 <https://www.gnu.org/licenses/>
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#ifndef _SHARED_UTIL_FACTORY_
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#define _SHARED_UTIL_FACTORY_
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#include <map>
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#include <string>
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#include <stdexcept>
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#include "platform_util.h"
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#include "leak_dumper.h"
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using std::map;
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using std::string;
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using std::pair;
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using std::runtime_error;
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namespace Shared {
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namespace Util {
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// =====================================================
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// class SingleFactoryBase
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// =====================================================
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class SingleFactoryBase {
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public:
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virtual ~SingleFactoryBase() {
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}
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virtual void *newInstance() = 0;
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};
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// =====================================================
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// class SingleFactory
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// =====================================================
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template<typename T>
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class SingleFactory : public SingleFactoryBase {
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public:
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virtual void *newInstance() {
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return new T();
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}
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};
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// =====================================================
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// class MultiFactory
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// =====================================================
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template<typename T>
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class MultiFactory {
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private:
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typedef map<string, SingleFactoryBase*> Factories;
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typedef pair<string, SingleFactoryBase*> FactoryPair;
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private:
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Factories factories;
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public:
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virtual ~MultiFactory() {
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for (Factories::iterator it = factories.begin(); it != factories.end(); ++it) {
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delete it->second;
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}
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factories.clear();
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}
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template<typename R>
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void registerClass(string classId) {
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factories.insert(FactoryPair(classId, new SingleFactory<R>()));
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}
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T *newInstance(string classId) {
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Factories::iterator it = factories.find(classId);
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if (it == factories.end()) {
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throw game_runtime_error("Unknown class identifier: " + classId);
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}
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return static_cast<T*>(it->second->newInstance());
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}
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bool isClassId(string classId) {
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return factories.find(classId) != factories.end();
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}
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};
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}
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} //end namespace
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#endif
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