/afs/cs.wisc.edu/u/n/w/nwilliam/private/workspace/Quut/src/filescan.h

#pragma once

#include <string>
#include "types.h"
#include "page.h"
#include "buffer.h"
#include "file_iterator.h"
#include "page_iterator.h"

namespace badgerdb {

class FileScan
{
 public:

  FileScan(const std::string &name, BufMgr *bufMgr);

  ~FileScan();

  void insertRecord(const std::string &rec, RecordId &outRid);

  void deleteRecord(RecordId rid);

  void startScan(int offset, int length, Datatype type, std::string filter, Operator op);

  void endScan();

  void scanNext(RecordId& outRid);

  std::string getRecord();

  std::string getRandomRecord(RecordId rid);

  void gotoMark(RecordId rid);

  bool matchRec(const std::string &rec);

  void flushFile();

  void markDirty();

 protected:
  BufMgr        *bufMgr;

 private:
  PageFile      *file;
  Page*         curPage;        // data page currently pinned in buffer pool
  FileIterator  filePageIter;   // page number of pinned page
  PageIterator  pageRecordIter; // rid of last record returned
  bool          curDirtyFlag;   // true if page has been updated
  int           offset;         // byte offset of filter attribute
  int           length;         // length of filter attribute
  Datatype      type;           // datatype of filter attribute
  std::string   filter;         // comparison value of filter
  Operator      op;             // comparison operator of filter
};

}