Association.h

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/*
 *  Copyright (C) 2010 - 2015 Leonid Kostrykin
 *
 *  Chair of Medical Engineering (mediTEC)
 *  RWTH Aachen University
 *  Pauwelsstr. 20
 *  52074 Aachen
 *  Germany
 *
 */

#ifndef ASSOCIATION_H_6014714286
#define ASSOCIATION_H_6014714286

#include <Carna/Carna.h>
#include <Carna/base/noncopyable.h>

namespace Carna
{

namespace base
{



// ----------------------------------------------------------------------------------
// Association
// ----------------------------------------------------------------------------------

template< typename AssociatedObjectType >
class Association
{

    NON_COPYABLE

public:

    virtual ~Association()
    {
    }

    AssociatedObjectType* get() const
    {
        return associatedObject;
    }

    AssociatedObjectType* operator->() const
    {
        return this->get();
    }

    AssociatedObjectType& operator*() const
    {
        return *this->get();
    }
    
    operator bool() const
    {
        return this->get() != nullptr;
    }

    void forget()
    {
        associatedObject = 0;
    }

protected:

    explicit Association( AssociatedObjectType* associatedObject = nullptr )
        : associatedObject( associatedObject )
    {
    }

private:

    AssociatedObjectType* associatedObject;

}; // Association



}  // namespace Carna :: base

}  // namespace Carna



template< typename AssociatedObjectType >
bool operator==( const Carna::base::Association< AssociatedObjectType >& l, const Carna::base::Association< AssociatedObjectType >& r )
{
    return l.get() == r.get();
}



#endif // ASSOCIATION_H_6014714286