DbBlockIterator.h

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// Copyright (C) 2002-2017, 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 
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// programs incorporating this software must include the following statement 
// with their copyright notices:
//   
//   This application incorporates Teigha(R) software pursuant to a license 
//   agreement with Open Design Alliance.
//   Teigha(R) Copyright (C) 2002-2017 by Open Design Alliance. 
//   All rights reserved.
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#ifndef ODDBBLOCKITERATOR_H
#define ODDBBLOCKITERATOR_H
 
#include "RxObject.h"
#include "OdArrayPreDef.h"
 
class OdDbObjectId;
class OdDbFilter;
class OdDbBlockTableRecord;
class OdDbBlockIterator;
typedef OdSmartPtr<OdDbBlockIterator> OdDbBlockIteratorPtr;
 
class  TOOLKIT_EXPORT OdDbBlockIterator : public OdRxObject
{
protected: 
  OdDbBlockIterator() {}
public:
  ODRX_DECLARE_MEMBERS(OdDbBlockIterator);
  
    virtual void start() = 0;
  
  virtual OdDbObjectId next() = 0;
  
  virtual OdDbObjectId id() const = 0;
  
    virtual bool seek(
    OdDbObjectId objectId) = 0;
 
  static OdDbBlockIteratorPtr newBlockIterator(
    const OdDbBlockTableRecord* pBtr);
 
  static OdDbBlockIteratorPtr newFilteredIterator(
      const OdDbBlockTableRecord* pBtr, 
      const OdDbFilter* pFilter);
 
  static OdDbBlockIteratorPtr newCompositeIterator(
      const OdDbBlockTableRecord* pBtr, 
      const OdArray<OdSmartPtr<OdDbFilter> >& filters);
 
};
class  TOOLKIT_EXPORT OdDbFilteredBlockIterator : public OdDbBlockIterator
{
protected: 
  OdDbFilteredBlockIterator() {}
public:
  ODRX_DECLARE_MEMBERS(OdDbFilteredBlockIterator);
 
  virtual double estimatedHitFraction() const = 0;
  
  virtual bool accepts(
    OdDbObjectId objectId) const = 0;
    
    virtual bool buffersForComposition() const;
  
  virtual void addToBuffer(
    OdDbObjectId objectId);
};
 
typedef OdSmartPtr<OdDbFilteredBlockIterator> OdDbFilteredBlockIteratorPtr;
 
 
#endif // ODDBBLOCKITERATOR_H