RxIterator.h

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// Copyright (C) 2002-2024, Open Design Alliance (the "Alliance"). 
// All rights reserved. 
// 
// This software and its documentation and related materials are owned by 
// the Alliance. The software may only be incorporated into application 
// programs owned by members of the Alliance, subject to a signed 
// Membership Agreement and Supplemental Software License Agreement with the
// Alliance. The structure and organization of this software are the valuable  
// trade secrets of the Alliance and its suppliers. The software is also 
// protected by copyright law and international treaty provisions. Application  
// programs incorporating this software must include the following statement 
// with their copyright notices:
//   
//   This application incorporates Open Design Alliance software pursuant to a license 
//   agreement with Open Design Alliance.
//   Open Design Alliance Copyright (C) 2002-2024 by Open Design Alliance. 
//   All rights reserved.
//
// By use of this software, its documentation or related materials, you 
// acknowledge and accept the above terms.
 
#ifndef _ODRXITERATOR_H_
#define _ODRXITERATOR_H_
 
#include "RxObject.h"
#include "SmartPtr.h"
#ifndef SWIG
#include <iterator>
#endif
 
#include "TD_PackPush.h"

class FIRSTDLL_EXPORT OdRxIterator : public OdRxObject
{
public:
 
  OdRxIterator() {}
 
  ODRX_DECLARE_MEMBERS(OdRxIterator);
  
    virtual bool done() const = 0;

  virtual bool next() = 0;

  virtual OdRxObjectPtr object() const = 0;
};

typedef OdSmartPtr<OdRxIterator> OdRxIteratorPtr;
 
#ifndef SWIG
template<typename I> class OdDbNextIteratorWrap
{
protected:
  OdSmartPtr<I> m_pIterator;
public:
  using difference_type = ptrdiff_t;
  using value_type = const I*;
  using pointer = void;
  using reference = const I*;
  using iterator_category = std::input_iterator_tag;
  OdDbNextIteratorWrap(const OdSmartPtr<I>& i)
  {
    m_pIterator = i;
    if (!!m_pIterator && m_pIterator->done())
      m_pIterator.release();
  }

  reference operator*() const { return m_pIterator.get(); }

  bool operator ==(const OdDbNextIteratorWrap& other) const { return m_pIterator == other.m_pIterator; }

  bool operator !=(const OdDbNextIteratorWrap& other) const { return m_pIterator != other.m_pIterator; }

  const OdDbNextIteratorWrap& operator++()
  {
    if (!!m_pIterator)
    {
      m_pIterator->next();
      if (m_pIterator->done())
        m_pIterator.release();
    }
    return *this;
  }
};
#endif
 
#include "TD_PackPop.h"
 
#endif // _ODRXITERATOR_H_