attrproj.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 AttrProj (attribute projection) class.
 */

/*
  $Id: AttrProj.h,v 1.5 1996/07/31 19:33:42 wenger Exp $

  $Log: AttrProj.h,v $
  Revision 1.5  1996/07/31 19:33:42  wenger
  Added AttrProj member functions for reading entire records (no projection).

  Revision 1.4  1996/05/14 15:34:51  wenger
  Added GetDataSize method to AttrProj class; removed vector.o from
  AttrProjLib.o; various cleanups.

  Revision 1.3  1996/05/01 16:19:35  wenger
  Initial version of code to project attributes now working.

  Revision 1.2  1996/04/30 15:31:52  wenger
  Attrproj code now reads records via TData object; interface to Birch
  code now in place (but not fully functional).

  Revision 1.1  1996/04/25 19:25:23  wenger
  Attribute projection code can now parse a schema, and create the
  corresponding TData object.

 */

#ifndef _AttrProj_h_
#define _AttrProj_h_


#include "DeviseTypes.h"
#include "RecId.h"
#include "VectorArray.h"
#include "ProjectionList.h"

class TData;

class AttrProj
{
public:
        AttrProj(char *schemaFile, char *attrProjFile, char *dataFile);
        ~AttrProj();

        /* Get the first and last record ID for the data. */
        DevStatus FirstRecId(RecId &recId);
        DevStatus LastRecId(RecId &recId);

        /* Get information about the number, cardinality, and size (in bytes)
         * of the records that will be returned when data is read. */
        DevStatus GetDataSize(int &projCount, const int *&attrCounts,
                const int *&projSizes);

        /* Get the number of attributes and total size of an entire record. */
        DevStatus GetWholeRecSize(int &attrCount, int &recSize);

        /* Create a VectorArray properly set up to hold the attribute projections
         * specified in the attribute projection file. */
        DevStatus CreateRecordList(VectorArray *&vecArray);

        /* Read a record from the data, projecting its attributes onto all
         * of the combinations specified in the attribute projection file.
         * vecArray must have already been set up. */
        DevStatus ReadRec(RecId recId, VectorArray &vecArray);

        /* Read an entire record (not its projections). */
        DevStatus ReadWholeRec(RecId recId, Vector &vector);

private:
        DevStatus ParseProjection(char *attrProjFile);

        TData *         _tDataP;

        char *          _recBuf;
        int                     _recBufSize;

        ProjectionList  _projList;
        int *           _attrCounts;    // For GetDataSize.
        int *           _projSizes;             // For GetDataSize.
};


#endif /* _AttrProj_h_ */

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