Observer.h

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/*
 * This file is a part of the Biology project by eons LLC.
 * Biology (aka Develop Biology) is a framework for approaching software
 * development from a natural sciences perspective.
 *
 * Copyright (C) 2021 Séon O'Shannon & eons LLC
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
 
#pragma once
 
#include "Perspective.h"
#include "bio/common/VirtualBase.h"
#include "bio/common/macros/Macros.h"
 
namespace bio {
namespace physical {
 
template < typename PERSPECTIVE >
class Observer :
    protected VirtualBase
{
public:
    typedef PERSPECTIVE Perspective;
 
    explicit Observer(Perspective* perspective = NULL)
        :
        m_perspective(perspective)
    {
    }
 
    Observer(const Observer& other)
        :
        m_perspective(other.m_perspective)
    {
    }
 
    virtual ~Observer()
    {
    }
 
    virtual void SetPerspective(Perspective* perspective)
    {
        m_perspective = perspective;
    }
 
    virtual 
    Perspective* GetPerspective() const
    {
        return m_perspective;
    }
 
protected:
    virtual void InitializeImplementation(ByteStreams args)
    {
        BIO_SANITIZE(args.size() == 1 && args[0].Is(m_perspective), ,
            return);
        m_perspective = args[0];
    }
 
private:
    Perspective* m_perspective;
};
 
} //physical namespace
} //bio namespace