file.h

Go to the documentation of this file.

/*
 * SwatDB
 *
 * @authors: See Contributors.doc for code contributors
 *
 * Copyright (c) 2020 Swarthmore College Computer Science Department
 * Swarthmore PA, Professors Tia Newhall, Ameet Soni
 */

#pragma once

#include <string>
#include <vector>
#include "swatdb_types.h"

// too many circular includes
class Catalog;
class BufferManager;
class Schema;

/* The class heirarchy:
 *
 *                      File
 *
 *              /        |          \
 *       HeapFile       Sorted File    IndexFile
 *                                      /      \
 *                                 BTreeIndex  HashIndex
*/

// TODO: not fully implemented
class File {

  public:

     File(Catalog *catalog, BufferManager *buf_mgr, Schema *schema);

    virtual ~File();

    virtual void createHeader() = 0;

    virtual void flushHeader() = 0;

    FileId getMyFid();

    // TODO add this method:  maybe protected with Catalog friend
    // void setMyFID(FileId *file_id);


    Schema* getSchema();

    PageId getHeaderId();

  protected:

    FileId  file_id;

    Catalog *catalog;

    BufferManager *buf_mgr;

    Schema *schema;

    PageId header_id;

    void _setMyFid(FileId file_id);

    friend class Catalog;
    friend class FileManager;
};