xorp

semantic_varrw.hh

00001 // -*- c-basic-offset: 4; tab-width: 8; indent-tabs-mode: t -*-
00002 // vim:set sts=4 ts=8:
00003 
00004 // Copyright (c) 2001-2011 XORP, Inc and Others
00005 //
00006 // This program is free software; you can redistribute it and/or modify
00007 // it under the terms of the GNU General Public License, Version 2, June
00008 // 1991 as published by the Free Software Foundation. Redistribution
00009 // and/or modification of this program under the terms of any other
00010 // version of the GNU General Public License is not permitted.
00011 // 
00012 // This program is distributed in the hope that it will be useful, but
00013 // WITHOUT ANY WARRANTY; without even the implied warranty of
00014 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. For more details,
00015 // see the GNU General Public License, Version 2, a copy of which can be
00016 // found in the XORP LICENSE.gpl file.
00017 // 
00018 // XORP Inc, 2953 Bunker Hill Lane, Suite 204, Santa Clara, CA 95054, USA;
00019 // http://xorp.net
00020 
00021 // $XORP: xorp/policy/semantic_varrw.hh,v 1.11 2008/10/02 21:58:00 bms Exp $
00022 
00023 #ifndef __POLICY_SEMANTIC_VARRW_HH__
00024 #define __POLICY_SEMANTIC_VARRW_HH__
00025 
00026 
00027 
00028 
00029 
00030 #include "policy/common/varrw.hh"
00031 #include "policy/common/element_base.hh"
00032 #include "policy/common/element_factory.hh"
00033 #include "policy/common/policy_exception.hh"
00034 
00035 #include "var_map.hh"
00036 
00048 class SemanticVarRW :
00049     public NONCOPYABLE,
00050     public VarRW
00051 {
00052 public:
00056     class var_error : public PolicyException {
00057     public:
00058         var_error(const char* file, size_t line, const string& init_why = "")   
00059             : PolicyException("var_error", file, line, init_why) {}  
00060     };
00061    
00065     SemanticVarRW(VarMap& vars);
00066     ~SemanticVarRW();
00067 
00078     const Element& read(const Id& id);
00079 
00090     void write(const Id& id, const Element& elem);
00091 
00097     void sync();
00098 
00104     void set_protocol(const string& proto);
00105 
00106 private:
00107     string _protocol;
00108     
00109     VarMap& _vars;
00110     ElementFactory _ef;
00111 
00112     set<Element*> _trash;
00113 };
00114 
00115 #endif // __POLICY_SEMANTIC_VARRW_HH__
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