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#ifndef FDPROV_H
#define FDPROV_H
#include "dataProvider.h"
#include "easylogging++.h"
#include <string>
#include <iostream>
#include <fstream>
// Rank qid features
class FileDP:public DataProvider
{
private:
std::string fname;
std::ifstream fin;
public:
FileDP(std::string fn=""):fname(fn){};
virtual int getDataSet(DataList &out);
virtual void getAllDataSet(RidList &out){ LOG(FATAL)<<"getAllDataSet for normal FileDP not implemented";};
virtual int open(){fin.open(fname); eof=false;return 0;};
virtual int close(){fin.close();return 0;};
};
// label features
class RidFileDP:public DataProvider
{
private:
std::string fname;
std::ifstream fin;
DataList d;
bool read;
int pos;
int qid;
public:
RidFileDP(std::string fn=""):fname(fn){read=false;};
void readEntries();
int getfSize() { if(!read) readEntries(); return d.getfSize();};
int getpSize();
void shuffle(std::vector<DataEntry*> &dat);
virtual void getAllDataSet(RidList &out);
virtual int getDataSet(DataList &out);
virtual int open(){fin.open(fname); eof=false;return 0;};
virtual int close(){fin.close(); d.clear();return 0;};
void take(int n,std::vector<DataEntry*> &a,std::vector<DataEntry*> &b);
void getRidVector(std::vector<DataEntry*> &rid){
if (!read)
readEntries();
rid.clear();
std::vector<DataEntry*> &dat = d.getData();
for (int i=0;i<dat.size();++i)
rid.push_back(dat[i]);
}
};
#endif
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