ReferenceT.h

/*
 
MIT License
 
Copyright (c) 2017 FMI Open Development / Markus Peura, first.last@fmi.fi
 
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
 
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
 
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
 
*/
/*
Part of Rack development has been done in the BALTRAD projects part-financed
by the European Union (European Regional Development Fund and European
Neighbourhood Partnership Instrument, Baltic Sea Region Programme 2007-2013)
*/
 
 
 
#ifndef DRAIN_REFERENCE_T
#define DRAIN_REFERENCE_T
 
#include "Log.h"
#include "VariableBase.h"
// #include "Castable.h" // not really needed
 
namespace drain {
 
//class Variable;
 
 
template <class T> // =Castable
class ReferenceT : public T {
 
public:
 
    typedef const drain::ReferenceT<T> reference_t;
 
    typedef std::pair<const char *,const drain::ReferenceT<T> > init_pair_t;
 
 
    virtual inline
    bool isLinkable() const {
        return true;
    }
 
 
    template <class T2>
    inline
    ReferenceT & link(ReferenceT<T2> &x){
        this->relink(x);
        return *this;
    }
 
    // "Originals"
    // ReferenceT & link(VariableT<T2> &x){
    //template <class T2>
    // VariableT<VariableInitializer<ReferenceT<VariableBase> > >
 
    inline
    ReferenceT & link(VariableT<ReferenceT<Castable> >  &x){
        this->relink(x);
        return *this;
    }
 
    inline
    ReferenceT & link(VariableT<VariableInitializer<ReferenceT<VariableBase> > > &x){
        if (x.isLinking()){
            //  Valid for 1) FlexibleVariable that is 2) linking external variable.
            // drain::Logger(__FILE__, __LINE__, __FUNCTION__).success<LOG_WARNING>("accessing external data (", x, ") of ", drain::TypeName< VariableT<VariableInitializer<ReferenceT<VariableBase> > > >::str());
            this->relink(x);
        }
        else {
            //drain::Logger(__FILE__, __LINE__, __FUNCTION__).fail(drain::TypeName< VariableT<T2> >::str(), ' ', x, ": linking internal data forbidden");
            drain::Logger(__FILE__, __LINE__, __FUNCTION__).fail("accessing internal data (", x, ") of ", drain::TypeName< VariableT<VariableInitializer<ReferenceT<VariableBase> > > >::str(), " forbidden");
            this->reset();
        }
        return *this;
    }
 
    inline
    ReferenceT & link(VariableT<VariableInitializer<VariableBase> > &x){
        // drain::TypeName<VariableT<ReferenceT > >::str(),
        drain::Logger(__FILE__, __LINE__, __FUNCTION__).fail(drain::TypeName< VariableT<VariableInitializer<VariableBase> > >::str(), ' ', x, ": linking internal data forbidden");
        this->reset();
        return *this;
    }
 
 
 
 
    template <class F>
    inline
    ReferenceT & link(F &p){
        try {
            this->setPtr(p);
        }
        catch (const std::exception & e){
            //Logger(__FILE__, __LINE__, __FUNCTION__).error("unsupported type: ", drain::TypeName<F>::str()); // , " msg:", e.what()
            Logger(__FILE__, __LINE__, __FUNCTION__).error("unsupported type: ", typeid(F).name(), ", value=", p, " msg:", e.what());
            // std::cerr << __FILE__ << ':' << __FUNCTION__ << ": unsupported type: " << typeid(F).name() << std::endl;
            // throw std::runtime_error("unsupported type");
        }
        return *this;
    }
 
 
    template <class F>
    inline
    ReferenceT & link(F *p){
        this->setPtr(p);
        return *this;
    }
 
    inline
    ReferenceT & link(void *p, const std::type_info &t, size_t count=1){
        this->setPtr(p, t);
        this->elementCount = count;
        // Why not this->setPtr(p, t, count); ?
        return *this;
    }
 
    // What about link(void *p){
    inline
    ReferenceT & link(void *p){
        throw std::runtime_error(std::string(__FILE__) + __FUNCTION__ + ": void type unsupported");
        return *this;
    }
 
    //template <class F>
    inline
    ReferenceT & link(Castable &x){
        this->relink(x);
        return *this;
    }
 
    inline
    void unlink(){
        this->reset();
        //this->unlink();
    }
 
protected:
 
    //template <class T2>
    /*
    void init(const ReferenceT<T> & ref) {
        // std::cerr << __FILE__ << ':' << __LINE__ << ':' << __FUNCTION__ << " " << ref << '[' << typeid(T).name() << ']'<< std::endl;
        std::cerr << __FILE__ << ':' << __LINE__ << ':' << __FUNCTION__ << " " << ref << '[' << TypeName< ReferenceT<T> >::str() << ']' <<  '[' << TypeName<T>::str() << ']'<< std::endl;
        this->reset(); // needed?
        //this->link(ref.getPtr(), ref.getType(), ref.getSize());
        this->relink(ref);
 
        //this->assignCastable(value);
    }
    */
 
 
    template <class D>
    void init(D & dst){
        this->link(dst);
    }
 
 
 
    template <class S>
    void init(const S & src){
        std::cerr << __FILE__ << ' ' << __LINE__ << ':' << __FUNCTION__ << " " << src << std::endl;
 
        T::init(src); // Undefined for Castable -> compile time error.
    }
 
 
 
    template <class D>
    void init(D *dst){
        this->link(dst);
    }
 
    inline
    void init(void *p, const std::type_info &t, size_t count=1){
        this->link(p, t, count);
    }
 
 
public:
 
protected:
 
    // Terminal
    inline
    void init(){
    }
 
};
 
template <>
template <class S>
inline
void ReferenceT<VariableBase>::init(const S & src){
    this->assign(src); // Safe for VariableBase
}
 
 
 
 
 
}
 
#endif