ObjectFactory.h

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/******************************************************************************
*
* Copyright Saab AB, 2023 (http://safirsdkcore.com)
*
* Created by: Lars Hagström / stlrha
*
*******************************************************************************
*
* This file is part of Safir SDK Core.
*
* Safir SDK Core is free software: you can redistribute it and/or modify
* it under the terms of version 3 of the GNU General Public License as
* published by the Free Software Foundation.
*
* Safir SDK Core 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 Safir SDK Core.  If not, see <http://www.gnu.org/licenses/>.
*
******************************************************************************/
 
#pragma once
 
#include <memory>
#include <Safir/Dob/Typesystem/Defs.h>
#include <Safir/Dob/Typesystem/Exceptions.h>
#include <mutex>
 
namespace Safir
{
namespace Dob
{
namespace Typesystem
{
    //forward declaration since we would rather not include dots_object.h (Object.cpp includes this file...)
    class Object;
 
    typedef std::shared_ptr<Object> ObjectPtr;
 
    class DOTS_CPP_API ObjectFactory
    {
    public:
        static ObjectFactory & Instance();
 
        ObjectPtr CreateObject(const TypeId typeId) const;
 
        typedef ObjectPtr (*CreateObjectCallback)(Int64 handle);
 
        bool RegisterClass(const TypeId typeId, const Int64 checksum, CreateObjectCallback createFunction);
 
        ObjectPtr CreateObject(char const * const blob) const;
 
        std::vector<std::pair<TypeId, Int64>> GetRegisteredTypes() const;
 
    private:
        ObjectFactory();
        ~ObjectFactory();
        ObjectFactory(const ObjectFactory&) = delete;
        ObjectFactory& operator=(const ObjectFactory&) = delete;
 
        class Impl;
 
        Impl* m_impl;
 
        struct SingletonHelper
        {
        private:
            friend ObjectFactory& ObjectFactory::Instance();
 
            static ObjectFactory& Instance();
            static std::once_flag m_onceFlag;
        };
    };
}
}
}