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/*
   FALCON - The Falcon Programming Language.
   FILE: citerator.h

   Base abstract class for generic collection iterators.
   -------------------------------------------------------------------
   Author: Giancarlo Niccolai
   Begin: dom giu 24 2007

   -------------------------------------------------------------------
   (C) Copyright 2004: the FALCON developers (see list in AUTHORS file)

   See LICENSE file for licensing details.
*/

#ifndef flc_citerator_H
#define flc_citerator_H

#include <falcon/setup.h>
#include <falcon/types.h>
#include <falcon/falcondata.h>

namespace Falcon {
class Sequence;
class Garbageable;
class Item;

class FALCON_DYN_CLASS CoreIterator: public FalconData
{
protected:
   CoreIterator();
   CoreIterator( const CoreIterator& other );
   Garbageable* m_creator;
   Sequence* m_creatorSeq;
   
public:
   virtual ~CoreIterator();
   
   virtual bool next() = 0;
   virtual bool prev() = 0;
   virtual bool hasNext() const = 0;
   virtual bool hasPrev() const = 0;
   virtual Item &getCurrent() const = 0;

   virtual bool isValid() const = 0;
   virtual bool isOwner( void *collection ) const = 0;
   virtual bool equal( const CoreIterator &other ) const = 0;
   virtual bool erase() = 0;
   virtual bool insert( const Item &item ) = 0;

   virtual void invalidate() = 0;
   virtual void setOwner( Garbageable *owner );
   virtual void setOwner( Sequence *owner );
   virtual void gcMark( uint32 mark );
};

}

#endif

/* end of citerator.h */

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