00001 /* 00002 * Copyright (C) 2008 Patrick Ohly 00003 * 00004 * This program is free software; you can redistribute it and/or modify 00005 * it under the terms of the GNU General Public License version 2 as 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, TITLE, NONINFRINGEMENT or FITNESS FOR A PARTICULAR 00012 * PURPOSE. See the GNU General Public License for more details. 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 00017 * 02111-1307 USA 00018 */ 00019 00020 #ifndef INCL_EVOLUTION_VOLATILE_CONFIG_NODE 00021 # define INCL_EVOLUTION_VOLATILE_CONFIG_NODE 00022 00023 #include "FilterConfigNode.h" 00024 #include "FileConfigNode.h" 00025 00026 /** 00027 * This class can store properties while in memory, but will never 00028 * save them persistently. Implemented by instantiating a FileConfigNode 00029 * with invalid path and never calling its flush() method. 00030 */ 00031 class VolatileConfigNode : public FilterConfigNode { 00032 public: 00033 VolatileConfigNode() : 00034 FilterConfigNode(boost::shared_ptr<ConfigNode>(new FileConfigNode("/dev/null", "dummy.ini"))) 00035 {} 00036 00037 virtual string getName() const { return "intermediate configuration"; } 00038 virtual void flush() {} 00039 }; 00040 00041 #endif