streamdctrain.h

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/*

Copyright (c) 2003, Cornell University
All rights reserved.

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modification, are permitted provided that the following conditions are met:

   - Redistributions of source code must retain the above copyright notice,
       this list of conditions and the following disclaimer.
   - Redistributions in binary form must reproduce the above copyright
       notice, this list of conditions and the following disclaimer in the
       documentation and/or other materials provided with the distribution.
   - Neither the name of Cornell University nor the names of its
       contributors may be used to endorse or promote products derived from
       this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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*/

// -*- C++ -*-

#ifndef _STREAMDCTRAIN_H
#define _STREAMDCTRAIN_H

#include "dctraingen.h"
#include <iostream>
#include "general.h"

using namespace std;

namespace CLUS
{

class StreamDCTrainingData : public DCTrainingData
{

protected:
    istream& in;
    
public:
    StreamDCTrainingData(istream& In, int M, int Ddims, int Cdims,
                         Vector<int>& DDomainSize) :
            DCTrainingData(M,Ddims,Cdims,DDomainSize), in(In)
    {
        int d_dims = NumDiscreteCols();
        int c_dims = NumCols();
        for (int i=0; i<M; i++)
        {
            // read first the discrete variables and check the range
            int* d_data = DTable[i];
            for (int j=0; j<d_dims; j++)
            {
                in >> d_data[j];
                assert(d_data[j]>=0);
                //cerr << dDomainSize[j] << endl;
                assert( d_data[j] < dDomainSize[j]);
                // check if out of the domain
                ExitIf ( (d_data[j] < 0 || d_data[j] >= dDomainSize[j]), "Discrete value out of bounds" );
            }
            // read the continuous part
            double* data=Table[i];
            for(int j=0; j<c_dims; j++)
                in >> data[j];
            in.ignore(BIG_NR,'\n'); // ignore the rest of the line
        }
    }
};

StreamDCTrainingData* CreateStreamDCTrainingDataFromFile(char* filename)
{
    /* The file looks like:
       # M d_dims c_dims
       # d1 d2 d3 ... d_{d_dims}
       .....
    */

    StreamDCTrainingData* data;
    ifstream in(filename);
    int M, d_dims, c_dims;

    string sharp;

    in >> sharp;
    ExitIf( (sharp!="#"), "Incorrect file format" );

    in >> M;
    in >> d_dims;
    in >> c_dims;

    Vector<int> dDomainSize(d_dims);

    if (d_dims > 0)
    {
        in >> sharp;
        ExitIf( (sharp!="#"), "Incorrect file format" );

        for (int i=0; i<d_dims; i++)
            in >> dDomainSize[i];
    }

    data = new StreamDCTrainingData(in,M,d_dims,c_dims,dDomainSize);
    return data;
}

}

#endif // _STREAMDCTRAIN_H

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