apt-inst/database.h

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: database.h,v 1.2 2001/02/20 07:03:16 jgg Exp $
   4 /* ######################################################################
   5
   6    Data Base Abstraction
   7
   8    This class provides a simple interface to an abstract notion of a
   9    database directory for storing state information about the system.
  10
  11    The 'Meta' information for a package is the control information and
  12    setup scripts stored inside the archive. GetMetaTmp returns the name of
  13    a directory that is used to store named files containing the control
  14    information.
  15
  16    The File Listing is the database of installed files. It is loaded
  17    into the memory/persistent cache structure by the ReadFileList method.
  18
  19    ##################################################################### */
  20                                                                         /*}}}*/
  21 #ifndef PKGLIB_DATABASE_H
  22 #define PKGLIB_DATABASE_H
  23
  24 #ifdef __GNUG__
  25 #pragma interface "apt-pkg/database.h"
  26 #endif
  27
  28 #include <apt-pkg/filelist.h>
  29 #include <apt-pkg/pkgcachegen.h>
  30
  31 class pkgDataBase
  32 {
  33    protected:
  34
  35    pkgCacheGenerator *Cache;
  36    pkgFLCache *FList;
  37    string MetaDir;
  38    virtual bool InitMetaTmp(string &Dir) = 0;
  39
  40    public:
  41
  42    // Some manipulators for the cache and generator
  43    inline pkgCache &GetCache() {return Cache->GetCache();};
  44    inline pkgFLCache &GetFLCache() {return *FList;};
  45    inline pkgCacheGenerator &GetGenerator() {return *Cache;};
  46
  47    bool GetMetaTmp(string &Dir);
  48    virtual bool ReadyFileList(OpProgress &Progress) = 0;
  49    virtual bool ReadyPkgCache(OpProgress &Progress) = 0;
  50    virtual bool LoadChanges() = 0;
  51
  52    pkgDataBase() : Cache(0), FList(0) {};
  53    virtual ~pkgDataBase() {delete Cache; delete FList;};
  54 };
  55
  56 #endif