CachedId.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) 2022 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 "bio/physical/relativity/Perspective.h"
#include "bio/common/cache/Cached.h"
 
namespace bio {
 
template < typename ID_TYPE >
class CachedId :
    public Cached< ID_TYPE, const Name&, ID_TYPE (physical::Perspective< ID_TYPE >::*)(const Name&) >
{
public:
 
    CachedId(
        const Name& lookup,
        physical::Perspective< ID_TYPE >& perspective
    )
        :
        Cached< ID_TYPE, const Name&, ID_TYPE (physical::Perspective< ID_TYPE >::*)(const Name&) >(
            lookup,
            0,
            &physical::Perspective< ID_TYPE >::GetIdFromName
        ),
        mPerspective(perspective)
    {
        Flush();
    }
 
    virtual ~CachedId()
    {
 
    }
 
    virtual void Flush()
    {
        this->mT = ((*SafelyAccess< physical::Perspective< ID_TYPE > >(&this->mPerspective))->*(this->mLookupFunction))(this->mLookup);
    }
 
    friend ::std::ostream& operator<<(
        std::ostream& out,
        const CachedId& t
    )
    {
        out << t.mT;
        return out;
    }
 
protected:
    physical::Perspective< ID_TYPE >& mPerspective;
};
 
} //bio namespace