00001 /**************************************************************************** 00002 Copyright (C)1996 David Jung <opensim@pobox.com> 00003 00004 This program/file is free software; you can redistribute it and/or modify 00005 it under the terms of the GNU General Public License as published by 00006 the Free Software Foundation; either version 2 of the License, or 00007 (at your option) any later version. 00008 00009 This program is distributed in the hope that it will be useful, 00010 but WITHOUT ANY WARRANTY; without even the implied warranty of 00011 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00012 GNU General Public License for more details. (http://www.gnu.org) 00013 00014 You should have received a copy of the GNU General Public License 00015 along with this program; if not, write to the Free Software 00016 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 00017 00018 $Id: CacheFile 1029 2004-02-11 20:45:54Z jungd $ 00019 $Revision: 1.3 $ 00020 $Date: 2004-02-11 15:45:54 -0500 (Wed, 11 Feb 2004) $ 00021 $Author: jungd $ 00022 00023 ****************************************************************************/ 00024 00025 #ifndef _BASE_CACHEFILE_ 00026 #define _BASE_CACHEFILE_ 00027 00028 #include <base/base> 00029 #include <base/VFile> 00030 #include <base/path_not_found> 00031 #include <base/io_error> 00032 00033 00034 #include <string> 00035 00036 namespace base { 00037 00038 class CacheFile : public VFile 00039 { 00040 public: 00041 virtual ~CacheFile(); 00042 00043 virtual String className() const { return String("CacheFile"); } 00044 virtual Object& clone() const { return *NewNamedObj(className()) CacheFile(*this); } 00045 00046 virtual const PathName path() const { return PathName(String()+PathName::separator); } 00047 virtual const PathName pathName() const { return path()+pathname.name(); } 00048 00049 virtual String extension() const { return pathname.extension(); } // the file's extension (e.g. .png) 00050 00051 virtual std::istream& istream() const throw(io_error); 00052 virtual std::ostream& ostream() const throw(io_error); 00053 virtual std::iostream& iostream(std::iostream::openmode mode = (std::iostream::in | std::iostream::out) ) const throw(io_error); 00054 00055 virtual void close() const throw(io_error); // close the file (can be re-opened again via istream/ostream/iostream() ) 00056 00057 protected: 00058 ref<VFile> actualFile; 00059 00060 CacheFile(const CacheFile& f) 00061 : VFile(f), actualFile(f.actualFile) {} 00062 CacheFile(const String& name, ref<VFile> actualFile) 00063 : VFile(PathName(name)), actualFile(actualFile) {} 00064 00065 friend class CacheDirectory; 00066 friend class VFileSystem; 00067 }; 00068 00069 } // base 00070 00071 #endif