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[apt.git] / apt-inst / database.h

diff --git a/apt-inst/database.h b/apt-inst/database.h
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+// -*- mode: cpp; mode: fold -*-
+// Description                                                         /*{{{*/
+// $Id: database.h,v 1.2 2001/02/20 07:03:16 jgg Exp $
+/* ######################################################################
+
+   Data Base Abstraction
+   
+   This class provides a simple interface to an abstract notion of a 
+   database directory for storing state information about the system.
+
+   The 'Meta' information for a package is the control information and
+   setup scripts stored inside the archive. GetMetaTmp returns the name of
+   a directory that is used to store named files containing the control
+   information. 
+   
+   The File Listing is the database of installed files. It is loaded 
+   into the memory/persistent cache structure by the ReadFileList method.  
+   
+   ##################################################################### */
+                                                                       /*}}}*/
+#ifndef PKGLIB_DATABASE_H
+#define PKGLIB_DATABASE_H
+
+#ifdef __GNUG__
+#pragma interface "apt-pkg/database.h"
+#endif
+
+#include <apt-pkg/filelist.h>
+#include <apt-pkg/pkgcachegen.h>
+
+class pkgDataBase
+{
+   protected:
+   
+   pkgCacheGenerator *Cache;
+   pkgFLCache *FList;
+   string MetaDir;
+   virtual bool InitMetaTmp(string &Dir) = 0;
+   
+   public:
+
+   // Some manipulators for the cache and generator
+   inline pkgCache &GetCache() {return Cache->GetCache();};
+   inline pkgFLCache &GetFLCache() {return *FList;};
+   inline pkgCacheGenerator &GetGenerator() {return *Cache;};
+   
+   bool GetMetaTmp(string &Dir);
+   virtual bool ReadyFileList(OpProgress &Progress) = 0;
+   virtual bool ReadyPkgCache(OpProgress &Progress) = 0;
+   virtual bool LoadChanges() = 0;
+
+   pkgDataBase() : Cache(0), FList(0) {};
+   virtual ~pkgDataBase() {delete Cache; delete FList;};
+};
+
+#endif