projectionlist.h

数据挖掘经典的hierarchial clustering algorithm

/*
  ========================================================================
  DEVise Data Visualization Software
  (c) Copyright 1992-1996
  By the DEVise Development Group
  Madison, Wisconsin
  All Rights Reserved.
  ========================================================================

  Under no circumstances is this software to be copied, distributed,
  or altered in any way without prior permission from the DEVise
  Development Group.
*/

/*
  Header file for ProjectionList class.
 */

/*
  $Id: ProjectionList.h,v 1.1 1996/06/17 19:14:58 wenger Exp $

  $Log: ProjectionList.h,v $
  Revision 1.1  1996/06/17 19:14:58  wenger
  Somehow the ProjectionList stuff never got committed before -- committing
  it now.

 */

#ifndef _ProjectionList_h_
#define _ProjectionList_h_


#include "DeviseTypes.h"


/* Holds the list of attributes for a particular projection. */
struct Projection
{
        int             attrCount;
        int *   attrList;
};

const int       illegalAttr = -1;

class ProjectionList
{
public:
        ProjectionList();
        ~ProjectionList();

        /* Add a new projection to the list (note that the _pointer_ to the
         * attrList array is copied; attrList will be deleted in the
         * destructor). */
        DevStatus AddProjection(Projection &proj);

        /* Get the first projection in the list. */
        Projection *GetFirstProj();

        /* Get the next projection in the list (call GetFirstProj() before
         * calling GetNextProj()). */
        Projection *GetNextProj();

        /* Get the number of projections in the list. */
        int GetProjCount();

private:
        struct ProjListNode
        {
                Projection              proj;
                ProjListNode *  next;
        };

        int                             _projCount;
        ProjListNode    _projList;              // Dummy node.
        ProjListNode *  _currentNodeP;  // For GetNextProj().
        ProjListNode *  _lastNodeP;             // For AddProjection().
};


#endif /* _ProjectionList_h_ */

/*============================================================================*/