refmap.hxx

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#ifndef INCLUDED_OOX_HELPER_REFMAP_HXX
#define INCLUDED_OOX_HELPER_REFMAP_HXX

#include <algorithm>
#include <functional>
#include <map>
#include <memory>

namespace oox {


template< typename KeyType, typename ObjType, typename CompType = std::less< KeyType > >
class RefMap : public std::map< KeyType, std::shared_ptr< ObjType >, CompType >
{
public:
    typedef std::map< KeyType, std::shared_ptr< ObjType >, CompType > container_type;
    typedef typename container_type::key_type                               key_type;
    typedef typename container_type::mapped_type                            mapped_type;
    typedef typename container_type::value_type                             value_type;
    typedef typename container_type::key_compare                            key_compare;

public:
    bool                has( key_type nKey ) const
                        {
                            const mapped_type* pxRef = getRef( nKey );
                            return pxRef && pxRef->get();
                        }

    mapped_type         get( key_type nKey ) const
                        {
                            if( const mapped_type* pxRef = getRef( nKey ) ) return *pxRef;
                            return mapped_type();
                        }

    template< typename FunctorType >
    void                forEach( const FunctorType& rFunctor ) const
                        {
                            std::for_each( this->begin(), this->end(), ForEachFunctor< FunctorType >( rFunctor ) );
                        }

    template< typename FuncType >
    void                forEachMem( FuncType pFunc ) const
                        {
                            forEach( ::std::bind( pFunc, std::placeholders::_1 ) );
                        }

    template< typename FuncType, typename ParamType1, typename ParamType2 >
    void                forEachMem( FuncType pFunc, ParamType1 aParam1, ParamType2 aParam2 ) const
                        {
                            forEach( ::std::bind( pFunc, std::placeholders::_1, aParam1, aParam2 ) );
                        }

    template< typename FuncType, typename ParamType1, typename ParamType2, typename ParamType3 >
    void                forEachMem( FuncType pFunc, ParamType1 aParam1, ParamType2 aParam2, ParamType3 aParam3 ) const
                        {
                            forEach( ::std::bind( pFunc, std::placeholders::_1, aParam1, aParam2, aParam3 ) );
                        }


    template< typename FunctorType >
    void                forEachWithKey( const FunctorType& rFunctor ) const
                        {
                            std::for_each( this->begin(), this->end(), ForEachFunctorWithKey< FunctorType >( rFunctor ) );
                        }

    template< typename FuncType >
    void                forEachMemWithKey( FuncType pFunc ) const
                        {
                            forEachWithKey( ::std::bind( pFunc, std::placeholders::_2, std::placeholders::_1 ) );
                        }


private:
    template< typename FunctorType >
    struct ForEachFunctor
    {
        FunctorType         maFunctor;
        explicit     ForEachFunctor( const FunctorType& rFunctor ) : maFunctor( rFunctor ) {}
        void         operator()( const value_type& rValue ) { if( rValue.second.get() ) maFunctor( *rValue.second ); }
    };

    template< typename FunctorType >
    struct ForEachFunctorWithKey
    {
        FunctorType         maFunctor;
        explicit     ForEachFunctorWithKey( const FunctorType& rFunctor ) : maFunctor( rFunctor ) {}
        void         operator()( const value_type& rValue ) { if( rValue.second.get() ) maFunctor( rValue.first, *rValue.second ); }
    };

    const mapped_type* getRef( key_type nKey ) const
    {
        typename container_type::const_iterator aIt = this->find( nKey );
        return (aIt == this->end()) ? nullptr : &aIt->second;
    }
};


} // namespace oox

#endif

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