lib_dispatcher.h

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/*****************************************************************************
* Multiscale Universal Interface Code Coupling Library                       *
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* Copyright (C) 2019 Y. H. Tang, S. Kudo, X. Bian, Z. Li, G. E. Karniadakis  *
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#ifndef LIB_DISPATCHER_H_
#define LIB_DISPATCHER_H_
 
#include "../general/util.h"
#include "../general/exception.h"
#include <unordered_map>
 
namespace mui
{
 
template<
    typename UUID,
    class    FPTR,
    class    EXCEPTION=exception_segv>
struct dispatcher
{
    FPTR dispatch( const UUID &id ) {
        auto i = dtable_.find(id);
        if ( i == dtable_.end() ) EXCEPTION();
        return i->second;
    }
    bool exist( const UUID &id ) {
        return dtable_.find(id) != dtable_.end();
    }
    FPTR operator [] ( const UUID &id ) {
        return dispatch(id);
    }
    bool link( const UUID &id, FPTR parser ) {
        return dtable_.insert( std::make_pair(id,parser) ).second;
    }
    bool unlink( const UUID &id ) {
        return dtable_.erase(id) == 1;
    }
protected:
    using assoc_table = std::unordered_map<UUID,FPTR>;
    assoc_table dtable_;
};
 
}
 
#endif /* LIB_DISPATCHER_H_ */