PoolItem.h

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#ifndef ZYPP_POOLITEM_H
#define ZYPP_POOLITEM_H

#include <iosfwd>
#include <functional>

#include "zypp/base/PtrTypes.h"
#include "zypp/ResObject.h"
#include "zypp/ResStatus.h"

namespace zypp
{ 

  //
  //    CLASS NAME : PoolItem_Ref
  //
  class PoolItem_Ref
  {
    friend std::ostream & operator<<( std::ostream & str, const PoolItem_Ref & obj );

  public:
    class Impl;

  public:
    PoolItem_Ref();

    explicit
    PoolItem_Ref( ResObject::constPtr res_r );

    PoolItem_Ref( ResObject::constPtr res_r, const ResStatus & status_r );

    ~PoolItem_Ref();

  public:
    ResStatus & status() const;

    ResObject::constPtr resolvable() const;

  public:
    operator ResObject::constPtr() const
    { return resolvable(); }

    ResObject::constPtr operator->() const
    { return resolvable(); }

    operator ResObject::constPtr::unspecified_bool_type() const
    { return resolvable(); }

  private:
    RW_pointer<Impl> _pimpl;

  private:
    friend class PoolItemSaver;
    void saveState() const;
    void restoreState() const;
    bool sameState() const;
  };

  typedef PoolItem_Ref PoolItem;

  std::ostream & operator<<( std::ostream & str, const PoolItem_Ref & obj );

  inline bool operator==( const PoolItem_Ref & lhs, const PoolItem_Ref & rhs )
  { return lhs.resolvable() == rhs.resolvable(); }

  inline bool operator==( const PoolItem_Ref & lhs, const ResObject::constPtr & rhs )
  { return lhs.resolvable() == rhs; }

  inline bool operator==( const ResObject::constPtr & lhs, const PoolItem_Ref & rhs )
  { return lhs == rhs.resolvable(); }


  inline bool operator!=( const PoolItem_Ref & lhs, const PoolItem_Ref & rhs )
  { return ! (lhs==rhs); }

  inline bool operator!=( const PoolItem_Ref & lhs, const ResObject::constPtr & rhs )
  { return ! (lhs==rhs); }

  inline bool operator!=( const ResObject::constPtr & lhs, const PoolItem_Ref & rhs )
  { return ! (lhs==rhs); }

} // namespace zypp
namespace std
{ 

  template<>
    inline bool less<zypp::PoolItem_Ref>::operator()( const zypp::PoolItem_Ref & lhs, const zypp::PoolItem_Ref & rhs ) const
    { return lhs.resolvable() < rhs.resolvable(); }

} // namespace zypp
#endif // ZYPP_POOLITEM_H

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