libbase/NamingPolicy.h

   1 //
   2 //   Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 Free Software
   3 //   Foundation, Inc
   4 //
   5 // This program is free software; you can redistribute it and/or modify
   6 // it under the terms of the GNU General Public License as published by
   7 // the Free Software Foundation; either version 3 of the License, or
   8 // (at your option) any later version.
   9 //
  10 // This program is distributed in the hope that it will be useful,
  11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 // GNU General Public License for more details.
  14 //
  15 // You should have received a copy of the GNU General Public License
  16 // along with this program; if not, write to the Free Software
  17 // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  18 //
  19
  20 #ifndef GNASH_NAMINGPOLICY_H
  21 #define GNASH_NAMINGPOLICY_H
  22
  23 #include "URL.h"
  24 #include "dsodefs.h"
  25
  26 #include <string>
  27
  28 namespace gnash {
  29
  30
  31 class NamingPolicy
  32 {
  33 public:
  34     NamingPolicy() {}
  35     virtual ~NamingPolicy() {}
  36     virtual std::string operator()(const URL&) const
  37     {
  38         return std::string();
  39     }
  40 };
  41
  42
  43 /// Make a non-unique cachefile name from the supplied name.
  44 /// If the directory cannot be created, return an empty string.
  45 class OverwriteExisting : public NamingPolicy
  46 {
  47 public:
  48     virtual std::string operator()(const URL&) const;
  49 };
  50
  51 /// Make a unique cachefile name from the supplied name.
  52 /// If all possible filenames are taken, return an empty string.
  53 class DSOEXPORT IncrementalRename : public NamingPolicy
  54 {
  55 public:
  56     IncrementalRename(const URL& baseURL);
  57     virtual std::string operator()(const URL& url) const;
  58
  59 private:
  60     const URL _baseURL;
  61 };
  62
  63 } // namespace gnash
  64
  65 #endif